Category: rent-control

What Is Oregon's Rent Increase Cap?

Oregon has one of the nation's strictest rent increase caps. Under ORS 90.323(2), the maximum allowable annual rent increase is tied directly to the Consumer Price Index (CPI) published by the U.S. Bureau of Labor Statistics.

This is not a percentage you set. It is not negotiable. It is not a guideline. It is a hard legal ceiling. Any rent increase that exceeds the CPI percentage is unenforceable under Oregon law, and tenants can challenge the increase in court or before the Bureau of Labor and Industries (BOLI).

The statute reads: "The owner of a rental unit may not increase rent in an amount that exceeds the percentage change in the Consumer Price Index for All Urban Consumers (CPI-U) for the Portland-Salem-Eugene area." This language is absolute. There are no exceptions for market conditions, property improvements, or increased operating costs (outside of utilities covered under separate utility billing arrangements).

Unlike some states that allow a flat percentage increase (e.g., 3% annually) or tie increases to inflation with a cap-and-floor formula, Oregon's approach is inflation-only with zero guaranteed increase. If CPI is negative (deflation), you cannot raise rent at all. If CPI is 0.5%, you cannot raise rent by 1%.

Understanding the CPI-U and the Correct Index to Use

Many landlords make a critical error: they use the national Consumer Price Index instead of the Portland-Salem-Eugene regional index, or they use the wrong month's data. Both mistakes create legal exposure.

You must use the CPI-U (Consumer Price Index for All Urban Consumers) for the Portland-Salem-Eugene, Oregon metropolitan area.

The Bureau of Labor Statistics publishes CPI data monthly, but Oregon's statute requires use of the specific regional index. The Portland-Salem-Eugene area includes Multnomah, Washington, Clackamas, Marion, Polk, and Yamhill counties. If your rental property is outside this region, you still use this index under ORS 90.323(2)—the statute does not carve out exceptions for rural areas or other Oregon regions.

The critical timing rule: The CPI figure you must use is published on or about the 31st of July each year. This figure represents the 12-month change in the index ending in June. You use this annual July release to calculate increases that take effect on or after August 1st of that year.

For example:

• The July 31, 2026 CPI-U release shows a 2.8% increase in the Portland-Salem-Eugene index for the 12-month period ending June 2026.
• You can notify tenants on or after August 1, 2026 that their rent will increase by up to 2.8%.
• The increase takes effect no sooner than 90 days after notice (minimum November 1, 2026).
• You cannot use the July 31, 2025 CPI figure (even if it was higher at 3.1%) to justify a 3.1% increase in November 2026.

You can access the correct CPI figure from the Bureau of Labor Statistics website (bls.gov) or request historical data. Many landlord associations and property management platforms publish the annual Oregon CPI figure shortly after the July 31st release to help landlords comply.

Step-by-Step: How to Calculate Your Rent Increase Correctly

Step 1: Determine Your Notice Timing and the Correct CPI Figure

Before you calculate anything, establish when you want the increase to take effect. This determines which CPI figure you must use.

Rule: You must provide written notice at least 90 days before the first rent payment at the increased amount is due.

If you want an increase effective November 1, 2026, your notice must be delivered by August 1, 2026 at the latest. The CPI figure applicable to that increase is the one published on July 31, 2026 (covering the 12-month period ending June 2026).

If you miss the August 1 deadline, you cannot use that CPI figure for a November 1 increase. You must wait until you can give proper 90-day notice using the next available CPI figure (published July 31, 2027).

Step 2: Locate the Correct CPI-U Figure for Portland-Salem-Eugene

Visit the BLS website and navigate to their CPI tables for Portland-Salem-Eugene, Oregon (Series ID APUS49A74714): All items in U.S. city average, not seasonally adjusted. Look at the annual average for the most recent 12-month period.

Example data (hypothetical for illustration):

Period	CPI-U Index Value	Percentage Change
June 2025 (12-month)	315.7	—
June 2026 (12-month)	324.1	2.66%

The BLS website typically calculates and displays this percentage change for you. Record this figure accurately—rounding errors matter.

Step 3: Calculate the New Rent Amount

Multiply the current monthly rent by the CPI percentage increase (expressed as a decimal).

Formula: New Rent = Current Rent × (1 + CPI percentage)

Example:

• Current rent: $1,400/month
• CPI percentage: 2.66%
• Calculation: $1,400 × (1 + 0.0266) = $1,400 × 1.0266 = $1,437.24
• New rent: $1,437.24/month

You may round to the nearest penny, but you cannot round up beyond what the formula produces. If the calculation yields $1,437.24, you cannot charge $1,437.50 or $1,438. Rounding that increases the effective percentage above CPI violates ORS 90.323(2).

Step 4: Prepare Written Notice

The notice must be in writing and must include:

• The current rent amount
• The new rent amount
• The effective date (no sooner than 90 days from delivery of notice)
• Clear statement that this is a rent increase under ORS 90.323(2)
• The CPI percentage used (optional but recommended for transparency and compliance documentation)

Oregon law does not prescribe a specific notice form, but your notice must be clear and unambiguous. Avoid language that could be interpreted as a conditional increase or one tied to other factors (e.g., "increased costs" or "market rates"). State only the increase amount and effective date.

Recommended language: "This is notice of a rent increase under Oregon Revised Statute 90.323(2). Effective [date], your rent will increase from $[current] to $[new] per month. This increase reflects the Consumer Price Index increase published by the U.S. Bureau of Labor Statistics."

Step 5: Deliver Notice and Maintain Proof of Delivery

Deliver the notice in writing. Oregon law permits delivery by:

• Hand delivery (in person)
• Certified mail or first-class mail to the tenant's address on file
• Email (if the tenant has agreed to electronic notice)
• Door posting (if the tenant cannot be located after reasonable efforts)

Proof of delivery is critical. If a tenant later disputes whether they received proper notice, you bear the burden of proving timely delivery. Keep:

• A signed delivery receipt (for hand delivery)
• USPS mail tracking (for certified mail)
• Email read receipts or delivery confirmations
• Photos showing posted notice with date stamp
• Your own dated records of when notice was sent

Without proof, a tenant can claim you failed to give 90 days' notice, which voids the increase entirely.

Critical Compliance Rules You Cannot Violate

No Increases in the First Year

Under ORS 90.323(3), you cannot increase rent during the first year of a tenancy. This applies even if the tenant has been there for 11 months and CPI is rising. The prohibition is strict: "During the first year that a tenant occupies a rental unit, the owner may not increase the rent."

The first year runs from the commencement date of the tenancy (the date the tenant takes occupancy), not from the lease signing date. If a tenant moves in on March 15, 2026, the first-year prohibition ends on March 15, 2027. You cannot raise rent until the first increase takes effect on or after March 15, 2027 (with 90 days' notice).

The 90-Day Notice Requirement Is Non-Negotiable

ORS 90.323(2) requires notice "at least 90 days before the rent increase takes effect." This is not 90 days before you can *propose* an increase or 90 days before you *intend* to increase. It is 90 days before the tenant's rent payment at the new amount is due.

If rent is due on the 1st of each month:

• To increase rent effective November 1, 2026, notice must be delivered by August 1, 2026.
• Notice delivered on August 2, 2026 allows the increase to take effect no earlier than November 2, 2026 (91 days later).
• Notice delivered on August 2, 2026 for a November 1, 2026 effective date is insufficient and voids the increase.

Do not rely on informal notices, text messages, or verbal conversations. Written notice is mandatory. Do not assume a tenant understood an increase because you mentioned it in passing.

No Increases Above the CPI Percentage

You cannot justify an increase above CPI by citing property improvements, increased property taxes, insurance costs, or market conditions. ORS 90.323(2) is a ceiling. There are no exceptions.

If a tenant makes significant improvements to the unit (e.g., adds a built-in bookshelf at their own expense), you still cannot increase rent above CPI.

If your property taxes increase by 15% in a given year, you still cannot increase rent above CPI.

The only exception is for utilities. If you provide utilities and the cost increases, you may adjust the rent to reflect the increased utility cost, separately and in addition to the CPI increase, under ORS 90.320(15). This requires a written addendum and specific documentation of utility costs. Do not assume you can bundle a utility adjustment into the CPI increase; they are separate calculations.

What Happens If You Violate the Rent Increase Rules

The Increase Is Void

If you increase rent in violation of ORS 90.323, the increase is not enforceable. You cannot collect the higher rent amount. A tenant can refuse to pay the increased amount, and a court will not order them to do so.

Tenant Claims for Damages

A tenant can file a claim against you for:

• Unjust enrichment: The difference between what you illegally collected and what you should have collected, refunded in full.
• Statutory damages: Some Oregon courts have awarded tenants penalties under ORS 90.100 (civil remedies for landlord violations).
• Attorney fees: If a tenant retains a lawyer to challenge an illegal increase and prevails, you may be ordered to pay their attorney fees.

Oregon courts interpret ORS 90.323 strictly in favor of tenants. Ignorance of the law is not a defense.

BOLI Complaints and Administrative Action

A tenant can file a complaint with the Oregon Bureau of Labor and Industries (BOLI), which enforces landlord-tenant law. BOLI can investigate, mediate disputes, and issue cease-and-desist orders. Repeat violations can result in BOLI referring cases to the Oregon Attorney General for civil enforcement.

Eviction Risk If You Attempt Collection

If you attempt to evict a tenant for non-payment of an illegally increased rent, the tenant can raise the illegality as a defense. An Oregon court will dismiss the eviction, and you may face a counterclaim for damages. Attempting to evict based on an illegal rent increase is a form of retaliatory conduct under ORS 90.385.

2026 CPI Data and Practical Examples

As of July 2026, Oregon landlords should use the CPI-U figure published on July 31, 2026, covering the 12-month period ending June 2026. (At the time of this article's publication in July 2026, the exact percentage is available through the BLS website.)

For planning purposes, here are scenarios showing how the calculation works:

Current Rent	CPI: 2.0%	CPI: 2.5%	CPI: 3.0%
$1,200	$1,224	$1,230	$1,236
$1,500	$1,530	$1,537.50	$1,545
$2,000	$2,040	$2,050	$2,060

These examples illustrate why precision matters. If you own 20 units and misunderstand the CPI figure by 0.5%, you could be collecting illegally increased rent from dozens of tenants simultaneously.

Compliance Checklist: Before You Issue a Rent Increase Notice

Use this checklist to avoid violations:

• ☐ Verify the tenant's first-year status: Is this tenant past the 12-month mark of their tenancy? If not, stop. No increase is allowed.
• ☐ Obtain the correct CPI-U figure: Have I retrieved the Portland-Salem-Eugene CPI-U from the BLS website for the correct month (July publication date)? Have I recorded the exact percentage change?
• ☐ Calculate the new rent amount: Have I used the formula: Current Rent × (1 + CPI%)? Have I checked my math twice?
• ☐ Determine the effective date: Will the new rent take effect at least 90 days after I deliver notice?
• ☐ Draft written notice: Have I prepared a clear, written notice (not verbal, not email without confirmation of receipt)? Does it state the current rent, new rent, and effective date?
• ☐ Deliver notice properly: Have I delivered the notice by a method that creates proof (certified mail, hand delivery with receipt, email with read receipt)?
• ☐ Document everything: Have I retained a copy of the notice, proof of delivery, the CPI figure used, and my calculation worksheet?
• ☐ Wait the full 90 days: Have I counted forward from the delivery date to confirm the effective date is at least 90 days away?

How Compliance Software Can Prevent Costly Errors

Many self-managing landlords rely on spreadsheets, email, or memory to track rent increase deadlines and calculations. This approach creates risk. One missed deadline, one rounding error, one tenant dispute—and you're facing a legal claim.

A compliance-aware platform like LeaseBase's rent payment tools can automate the tracking of when tenants become eligible for increases (first-year block), store the correct CPI-U data for your state, calculate increases precisely, and alert you when the 90-day notice window opens. The system generates compliant notice templates and logs delivery proof.

Paired with LeaseBase's compliance engine, you can verify that each increase adheres to Oregon law before it takes effect. This removes guesswork and gives you confidence that you're not exposing yourself to tenant claims or BOLI complaints.

For landlords managing multiple units, this automation is not a convenience—it is essential. One illegal increase across 10 units could cost you thousands in refunds and legal fees.

FAQ: Oregon Rent Increase Calculation

Q1: Can I increase rent by a flat amount instead of a percentage (e.g., $50 per month)?

No. ORS 90.323(2) explicitly limits increases to the CPI percentage. You cannot offer a choice between a percentage and a flat amount, and you cannot increase by any amount the statute does not permit. Flat-dollar increases are void under Oregon law, even if the tenant agrees to them.

Q2: If CPI is negative (deflation), can I leave rent flat instead of decreasing it?

Yes, with a critical caveat. Oregon law does not permit you to increase rent above CPI, but it also does not require you to decrease rent if CPI is negative. You may maintain the current rent. However, once you establish a rent amount, you are bound by it until the next annual increase opportunity. You cannot argue that you "would have decreased rent if deflation had continued"—the choice is binary: increase within the CPI ceiling, or maintain current rent.

Q3: What if the tenant disputes the CPI figure I used? Who bears the burden of proof?

You do. If a tenant challenges an increase as exceeding CPI, you must prove that you used the correct Portland-Salem-Eugene CPI-U figure from the BLS and that your calculation is accurate. You should retain documentation: screenshots of the BLS website showing the figure, your calculation worksheet, and the date you obtained the data. Without this proof, a court will likely invalidate the increase and award damages to the tenant.

Q4: Can I increase rent if the tenant hasn't paid utilities, and I'm trying to recover those costs?

Not through the standard CPI increase. Utility cost recovery is a separate mechanism under ORS 90.320(15). If you provide utilities and costs increase, you must calculate a utility adjustment separately from the CPI increase. The utility adjustment must be supported by documentation of actual utility cost increases. It is not included in the CPI increase amount. Mixing the two is a violation.

Q5: If I own properties in multiple Oregon counties, do I use different CPI figures for each?

No. ORS 90.323(2) requires use of the "Portland-Salem-Eugene area" CPI-U regardless of where the rental unit is located. Even if you own a property in Bend or Klamath Falls, you use the Portland-Salem-Eugene figure. Oregon has not established separate CPI benchmarks by region.

Key Dates and Deadlines for July–December 2026

Date	Action
July 31, 2026	BLS publishes CPI-U for Portland-Salem-Eugene (12-month period ending June 2026). Landlords can now use this figure for increases effective November 1, 2026 or later.
August 1, 2026	Deadline to deliver notice for November 1, 2026 increases (90 days before effective date).
November 1, 2026	First rent increase based on July 2026 CPI figure takes effect (for notices delivered by August 1).
December 1, 2026	Last possible effective date for increases using July 2026 CPI figure (notices must be delivered by September 1, 2026).

Resources for Accurate CPI Data

• U.S. Bureau of Labor Statistics (BLS): bls.gov — Search "Portland-Salem-Eugene" CPI-U data. Series ID: APUS49A74714.
• Oregon Bureau of Labor and Industries (BOLI): oregon.gov/boli — Enforcement agency; file complaints or request guidance on compliance.
• Oregon State Bar Lawyer Referral Service: oregonstatebar.org — Find an attorney for questions specific to your property or tenancy.
• LeaseBase Compliance Engine: LeaseBase.com — Oregon-specific rent increase calculator and notice templates.

Bottom Line: Compliance Is Mandatory, Not Optional

Oregon's rent increase law is strict. There is no room for approximation, rounding discretion, or "close enough" calculations. You must use the correct CPI figure, provide 90 days' written notice, respect the first-year ban, and calculate the increase to the penny.

Violations expose you to tenant claims for unjust enrichment, attorney fees, and potential agency complaints. The cost of getting it wrong—in refunds, legal fees, and lost rent—far exceeds the modest increases Oregon law allows.

Take the time to do it correctly. Verify the CPI figure directly from the BLS, double-check your math, prepare a clear written notice, and retain proof of delivery. Document your compliance process. If you manage multiple units, use a system that automates these calculations and logs compliance steps.

Compliance is not a burden—it is the foundation of predictable, defensible rent management.

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Disclaimer: This article is for informational purposes only and does not constitute legal advice. Consult a qualified attorney for guidance specific to your situation, property location, tenancy details, or disputes. Oregon landlord-tenant law is complex and subject to administrative interpretations. This article reflects the law as of July 2026 and may not account for subsequent legislative or judicial changes.

What Are Individual Apartment Improvements (IAI) Under New York Rent Stabilization?

Individual Apartment Improvements (IAI) are capital improvements made to a rent-stabilized apartment that benefit only that specific unit—not the entire building. Under New York's Housing Stability and Tenant Protection Act of 2019 (HSTPA), landlords can request rent increases to recover the cost of these improvements, but the increase is strictly capped by law.

The statute that governs this is New York Revised Penal Law (RSL) §2522.4(a)(13), which establishes the formula for calculating permissible IAI rent increases. This statute is one of the most frequently misunderstood provisions in rent stabilization law, and violations can expose self-managing landlords to significant liability.

Unlike major capital improvements (MCIs)—which affect the entire building and are approved by the Rent Guidelines Board—IAI increases are technically allowed without RGB approval. However, this does not mean you can charge whatever you want. The law imposes strict caps that many landlords inadvertently exceed, leading to tenant complaints and enforcement actions by the Division of Housing and Community Renewal (DHCR).

The HSTPA 2019 Rule Change: Everything You Need to Know

Before June 14, 2019, New York's rent stabilization law allowed landlords to pass through up to 1/84th of the cost of a major capital improvement (MCI) or individual apartment improvement (IAI) as a permanent rent increase. Under the pre-HSTPA rule, a $50,000 improvement could justify a rent increase of $595 per month indefinitely.

The Housing Stability and Tenant Protection Act of 2019 fundamentally changed this formula for apartments in buildings that became subject to rent stabilization on or after June 14, 2019. The new cap is significantly more restrictive:

Post-HSTPA IAI Cap (effective June 14, 2019 onward):

The annual rent increase is limited to the lesser of:

• 1/40th of the cost of the improvement, divided over the remaining useful life of the component (minimum 10 years), OR
• 2.5% of the tenant's current rent

This means that even if you spend $10,000 on a kitchen renovation, the maximum annual rent increase you can pass through is 2.5% of what the tenant currently pays—even though 1/40th of $10,000 is $250 per month.

Buildings that became subject to stabilization before June 14, 2019 continue to operate under the older formula, which allows increases of up to 1/84th of the improvement cost (with no 2.5% cap). However, even pre-HSTPA apartments are subject to the "super-stabilization" rules that apply in buildings with six or more units in New York City.

The $2,500 Threshold: What Improvements Qualify?

Not every repair or upgrade to a rent-stabilized apartment triggers IAI rights. Section 2522.4(a)(13) requires that the improvement meet the definition of a "capital improvement"—which means it must cost at least $2,500 per apartment.

The DHCR interprets this threshold strictly. If you replace a tenant's toilet, sink, and bathroom vanity for $1,800, that does not qualify as an IAI even if you document the expense. Similarly, minor cosmetic work, paint, or repairs of existing systems do not qualify.

Examples of qualifying improvements (typically $2,500+):

• Kitchen renovation (cabinets, countertops, appliances)
• Bathroom renovation (tub, tiles, fixtures)
• Flooring replacement (hardwood, tile, or carpet in multiple rooms)
• Window replacement (entire apartment)
• HVAC system replacement
• Electrical system upgrade
• Plumbing system replacement
• Installation of new security system or intercom
• Roofing (apportioned to individual units)

Examples of non-qualifying improvements:

• Paint, wallpaper, or cosmetic finishes
• Minor repairs to existing systems
• Appliance repair (not replacement)
• Light fixture replacement
• Cabinet hardware or door knobs
• Installation of air conditioning units in a single room

How to Calculate IAI Increases Correctly

The calculation process requires precision. Mistakes here will expose you to penalties. Follow this step-by-step approach:

Step 1: Document All Qualifying Costs

Collect itemized invoices and receipts from contractors. The cost must be objectively documented. You cannot estimate or rely on informal quotes. The DHCR will request these documents if a tenant disputes your increase, and they must be available for at least six years.

Include only the direct cost of the improvement itself. Do not include overhead, profit markups, or your own labor costs (unless you are a licensed contractor and can document the hourly rate you would charge an unrelated third party).

Step 2: Confirm the Tenant's Current Regulated Rent

The increase is calculated as a percentage of the tenant's current regulated rent—not the market rate or what you wish you could charge. This is the rent the tenant is currently paying under their lease.

Step 3: Apply the Post-HSTPA Formula (if applicable)

For buildings that became subject to rent stabilization on or after June 14, 2019:

Maximum Annual Increase = Lesser of:

• (Total Improvement Cost ÷ 40) ÷ Useful Life (minimum 10 years), OR
• 2.5% of Current Regulated Rent

Example: A tenant's current regulated rent is $1,200/month. You complete a $6,000 kitchen renovation in a post-HSTPA building.

• 1/40th formula: ($6,000 ÷ 40) ÷ 10 years = $15/month or $180/year
• 2.5% cap: $1,200 × 0.025 = $30/month or $360/year
• Permissible increase: $15/month (the lesser amount)

In this scenario, even though the tenant received a $6,000 benefit, you can only increase their rent by $15/month. This is why IAI increases are rarely worth pursuing unless the improvement is very expensive.

Step 4: Determine the Useful Life of the Component

The useful life is how long the improvement is expected to last before requiring replacement. The DHCR has published guidelines for common improvements:

Improvement Type	Useful Life (Years)
Kitchen cabinets & countertops	10
Flooring	10
Windows	20
HVAC system	15
Plumbing/electrical system	20
Bathroom fixtures	10
Roofing	20

If no useful life is specified by the DHCR for your type of improvement, use 10 years as the default minimum.

Step 5: Document and Notify the Tenant in Writing

Before implementing any IAI increase, you must provide written notice to the tenant that includes:

• Description of the improvement(s) made
• Total cost of the improvement
• The calculation methodology used
• The amount of the rent increase
• The effective date of the increase
• Citation to RSC §2522.4(a)(13)
• A copy of the invoices or receipts documenting the cost

This notice must be provided at least 30 days before the increase takes effect. Failure to provide proper notice is a violation that can result in the tenant winning a court case against you, even if your calculation was correct.

Pre-HSTPA Buildings: The Legacy IAI Rules

If your building became subject to rent stabilization before June 14, 2019, the rules are different—and generally more favorable to landlords.

For pre-HSTPA apartments, the allowable increase is:

• 1/84th of the improvement cost (in most buildings), OR
• 1/120th of the improvement cost (in buildings in which the owner received tax benefits under the J-51 or 421-a programs)

There is no 2.5% cap on pre-HSTPA IAI increases. This means a $50,000 renovation could justify a $595/month permanent increase.

However, pre-HSTPA buildings in New York City are also subject to "super-stabilization" limits, which cap annual increases regardless of the formula. As of 2026, this remains one of the most complex intersection points in New York rent stabilization law.

If your building is pre-HSTPA, consult the DHCR's building registration file to confirm the exact rules that apply to your property. LeaseBase's compliance engine can help you track which rule applies to each apartment.

Vacancy Bonuses and IAI: Do They Stack?

Many landlords ask whether they can combine a vacancy bonus (the increase allowed when a rent-stabilized tenant vacates and a new tenant moves in) with an IAI increase.

The answer is no. Under HSTPA §2522.4(a)(13), you must choose one adjustment mechanism per lease renewal. You cannot apply both a vacancy bonus and an IAI increase in the same lease cycle.

This means if you perform a $5,000 kitchen renovation and the tenant vacates six months into their renewal, you do not get both the IAI increase and the vacancy bonus for the new tenant. Choose the option that provides the largest increase.

The $2,500 Per-Apartment Rule: Critical for Multi-Unit Buildings

The statute specifies that the $2,500 minimum applies per apartment. If you perform a hallway renovation or common area upgrade that benefits multiple apartments, you cannot divide the cost across units to qualify for IAI treatment.

However, if you renovate individual apartments as part of a larger project, each apartment's portion must meet the $2,500 threshold independently. For example, if you renovate five apartments at $1,800 each for electrical upgrades, none of them qualify because each is below $2,500. If you renovate two apartments at $3,500 each, both qualify.

Penalties for IAI Violations

The consequences of overcharging under IAI are severe. RSC §2523.5 provides for treble damages plus attorney fees:

Illegal Overcharges = Three Times the Overcharge Amount + Attorney Fees + Court Costs

Example: You charged a tenant a $50/month IAI increase that should have been capped at $15/month. The overcharge is $35/month. If the tenant pays for 24 months before filing a complaint, the total overcharge is $840. The tenant can recover $2,520 (treble damages) plus attorney fees, which typically range from $2,000 to $10,000+ depending on the complexity and length of litigation.

Additionally, the DHCR can order:

• Refund of all overcharges with interest
• Rent reduction order that lowers the tenant's regulated rent going forward
• Penalty against your broker license (if applicable)
• Administrative fines up to $2,500 for willful violations

Tenants do not need to wait for a DHCR decision. They can file suit directly in housing court under Article 7 of the Real Property Actions and Proceedings Law (RPAPL). Once a tenant establishes that you overcharged, the burden shifts to you to prove the calculation was correct.

Documentation Requirements: What You Must Keep

The DHCR and courts will request extensive documentation if a tenant disputes your IAI increase. Here is what you must retain for at least six years:

• Original invoices and receipts — itemized, showing exactly what was purchased or installed
• Contractor licenses and insurance — proof that work was performed by qualified professionals
• Contracts or work orders — signed agreements specifying scope and cost
• Permit approvals — if the work required DOB or HPD approval
• Before-and-after photographs — visual evidence of the work completed
• Payment records — cancelled checks, wire transfer confirmations, credit card statements
• Tenant notification letters — proof that you provided 30-day notice with all required information
• Lease renewal documents — the actual lease showing the increased rent amount

Disorganized or incomplete documentation is treated as evidence that the improvement may not have qualified. If you cannot produce an itemized invoice, the DHCR will assume the cost was inflated or the work was not completed as claimed.

Compliance Checklist for IAI Rent Increases

Use this checklist before implementing any IAI increase:

• ☐ Verify that the building became subject to rent stabilization on or after June 14, 2019 (or confirm the pre-HSTPA rules if before)
• ☐ Confirm that the improvement cost is at least $2,500 per apartment
• ☐ Collect itemized invoices and receipts from contractor(s)
• ☐ Calculate the permissible increase using both the 1/40th formula and the 2.5% cap
• ☐ Apply the lesser amount as the maximum permissible increase
• ☐ Determine the useful life of the improvement component (use DHCR guidelines or 10-year minimum)
• ☐ Divide the annual increase by the useful life to establish the first-year amount
• ☐ Prepare written notice including all required disclosures and cost documentation
• ☐ Provide notice at least 30 days before the increase takes effect
• ☐ Include the 30-day notice in the lease renewal or amendment
• ☐ Store all documentation (invoices, photos, notices, lease) for at least 6 years
• ☐ Do not combine the IAI increase with a vacancy bonus in the same lease cycle

Recent DHCR Guidance and Enforcement Trends (2025-2026)

In 2025 and early 2026, the DHCR has taken a strict stance on IAI compliance, particularly regarding:

Contractors' Markups: The DHCR has questioned whether general contractor markups of 15-25% are allowable as part of the "cost" of the improvement. The agency's position is evolving, but it tends to allow reasonable overhead (10-15%) while scrutinizing amounts above that. Always request a detailed cost breakdown from your contractor.

Landlord Labor Costs: Self-managing landlords often perform some work themselves and claim it as part of the improvement cost. The DHCR allows this only if you can document the hourly rate you would charge an unrelated third party for the same work. Casual labor rates or inflated owner-labor claims are frequently rejected.

Partial Renovations: Tenants have increasingly challenged whether partial kitchen or bathroom work qualifies as an "improvement." For example, replacing only the cabinet fronts without the full cabinet system may not meet the capital improvement threshold. The DHCR considers the functional upgrade, not just the cost.

Utility Installation: Adding new utilities or appliances (such as an air conditioning unit or dishwasher) where none existed before is generally qualifying, but replacing existing appliances is not. Documentation of the "before" condition is essential.

Frequently Asked Questions

Q: Can I use the IAI increase if the tenant requested the improvement?

A: Not without strict adherence to the law. If a tenant requests an improvement, you can still charge an IAI increase—but only up to the statutory cap. You cannot negotiate a higher increase in exchange for performing the work. Any agreement promising the tenant they will accept a larger increase in exchange for the improvement is void and unenforceable. The tenant always has the right to refuse the IAI increase and request a DHCR review of your calculation.

Q: What if the improvement was performed in a prior year but I'm only now increasing the rent?

A: You must implement the increase in the first lease renewal after the improvement is substantially completed. If you wait multiple years, you forfeit the right to the increase. You cannot perform work in 2024 and charge an increase starting in 2026. The statute does not authorize retroactive increases. The 30-day notice requirement starts when you inform the tenant, and the increase takes effect at the next lease renewal opportunity after that notice.

Q: Does the DHCR have to approve my IAI increase before I implement it?

A: No. Unlike major capital improvements (MCIs), which require Rent Guidelines Board approval, IAI increases do not require DHCR pre-approval. However, you are responsible for calculating the increase correctly. If a tenant disputes it, the burden is on you to prove the calculation complied with §2522.4(a)(13). There is no "approval" shield; the law applies regardless.

Q: If I own a 3-unit building, do the super-stabilization rules apply to my IAI increases?

A: Super-stabilization rules (which impose additional caps on rent increases) apply only to buildings of six or more units in New York City. In buildings with fewer than six units outside NYC, the standard HSTPA IAI rules apply without the super-stabilization overlay. Check your local laws if your building is outside New York City; some municipalities have their own rent stabilization statutes with different IAI rules.

Q: What happens if the tenant moves out before the IAI increase takes effect?

A: If you provided notice that the increase would take effect on a specific date, but the tenant moves out before that date, the increase does not carry over to the next tenant. IAI increases are tenant-specific. When a new tenant moves in, you start fresh with their lease. However, if the improvement was completed and you properly documented it, you can offer to include an IAI increase in the new tenant's lease if they are moving in after the improvement and it meets the $2,500 threshold. The new tenant would receive the disclosure and 30-day notice required by law.

Technology and IAI Compliance Tracking

Self-managing landlords often track IAI costs in spreadsheets, which creates compliance risk. A single calculation error, misplaced invoice, or missed notification deadline can expose you to significant liability.

LeaseBase's compliance engine automatically flags when an improvement may qualify for an IAI increase, prompts you to enter documented costs, calculates the permissible increase based on your building's status (pre- or post-HSTPA), and generates the required tenant notification letter with all statutory disclosures. This reduces the risk of calculation errors and ensures documentation is retained for audit purposes.

For portfolios managing multiple buildings or properties in different jurisdictions, the platform's portfolio management tools allow you to track which buildings are subject to HSTPA rules and which fall under legacy rent stabilization law, ensuring the correct formula is applied to each apartment.

What Happens if You Make a Mistake?

If you implement an IAI increase that exceeds the statutory cap, the remedies are:

Option 1: Proactive Correction — Notify the tenant in writing that you made a calculation error, provide a revised lease showing the corrected (lower) increase, and offer to refund any overpayment for prior periods. This does not shield you from liability, but it demonstrates good faith and may reduce damages if the tenant still files a complaint.

Option 2: DHCR Complaint — The tenant files a complaint with the DHCR, which reviews your documentation and calculation. If the DHCR finds an overcharge, it orders a refund with interest (typically 6% per year) and may issue a rent reduction order that lowers the tenant's rent going forward.

Option 3: Housing Court Litigation — The tenant sues in housing court for overcharges plus treble damages and attorney fees. This is the most costly outcome for the landlord.

In all scenarios, you will owe back the overcharge. The only variable is whether the tenant also recovers treble damages and attorney fees, which depends on whether you acted willfully or reasonably but mistakenly.

Conclusion: Compliance Requires Precision

Individual apartment improvements are one of the most litigated provisions in New York rent stabilization law because the calculation is mathematically precise but easily misunderstood. A $10,000 renovation does not justify a $250/month increase just because it cost $10,000. The 2.5% cap on post-HSTPA IAI increases means you must be selective about which improvements you pursue for rent increases.

The key to compliance is:

• Know whether your building is pre- or post-HSTPA (this changes the entire calculation)
• Document costs meticulously with itemized invoices
• Calculate using both the cost formula and the percentage cap, then apply the lower amount
• Provide 30-day written notice with all statutory disclosures before implementing any increase
• Retain all documentation for six years
• Never overcharge, even slightly

Self-managing landlords with 2-75 units can use lease operations tools to standardize this process and reduce errors. The cost of compliance software is minimal compared to the exposure of a single tenant lawsuit.

Disclaimer: This article is for informational purposes only and does not constitute legal advice. Consult a qualified attorney for guidance specific to your situation. Rent stabilization law is complex and varies by building registration date, property location, and other factors. Always verify the specific rules that apply to your property with the DHCR or a licensed attorney in New York.