Oregon's security deposit law looks generous to landlords at first glance. There's no statewide cap on how much you can collect, and you don't even have to actually make a repair before charging a tenant for it. Read a little further and the balance shifts hard.

Miss the 31-day accounting deadline by a single day and you may owe the tenant twice the amount you held. Oregon appellate courts have held that judges don't have discretion to reduce that statutory recovery, which means there's no "we were only two days late, your honor" defense worth making.

That combination, wide latitude on the front end and an unforgiving clock on the back end, is what makes Oregon deposits a documentation problem rather than a legal one. This guide covers what you can collect, what you can deduct, exactly how the 31-day clock runs, what the written accounting has to contain, and the local rules that make Portland a different game entirely.

Quick answer: Oregon sets no statutory cap on residential security deposits, but under ORS 90.300 a landlord must give the tenant a written accounting stating the specific basis for any claim, and return the unclaimed balance, within 31 days after the tenancy terminates and the tenant delivers possession. Missing that deadline can expose the landlord to twice the amount withheld.

Key takeaways

• Oregon has no statewide cap on security deposit amounts, though local ordinances (notably Portland) impose their own limits.

• A landlord generally cannot require a new or increased deposit during the first year of a tenancy.

• The 31-day clock starts only when both conditions are met: the tenancy has terminated and the tenant has delivered possession.

• "Security deposit" includes a last month's rent deposit, but prepaid rent requires its own separate accounting.

• Deductions are limited to unpaid rent and other defaults, plus tenant-caused damage beyond ordinary wear and tear.

• Failing to provide a written accounting, or withholding in bad faith, can mean liability for twice the amount.

Oregon security deposit rules at a glance

This table summarizes the general statewide rules. Local ordinances can be stricter, and specific facts control. Confirm the current statute for your situation.

How much can you collect? The no-cap rule and its limits

Oregon is one of the states that doesn't set a statutory ceiling on residential security deposits. The statute simply permits a landlord to require one. In practice, market conditions and local ordinances do the limiting, not ORS 90.300.

That said, "no cap" doesn't mean "no rules." Three constraints matter operationally.

First, timing. A landlord generally may not change the rental agreement to require a new or increased security deposit during the first year after the tenancy begins. There's a narrow exception: if the landlord and tenant agree to modify the rental agreement (to permit a pet, for instance, or for other cause) and the additional deposit relates to that modification, it's permitted. The rule also doesn't stop you from collecting a deposit the original agreement provided for but that went unpaid at move-in.

Second, installments. If you require a new or increased deposit after the first year, you must give the tenant at least three months to pay it.

Third, documentation. A written rental agreement has to list the security deposit, and you must give the tenant a receipt for any deposit paid. These are small requirements that are easy to skip and awkward to explain later.

Two more limits worth knowing: you cannot charge a pet security deposit for a service animal or companion animal that a tenant with a disability requires as a reasonable accommodation under fair housing law, and you cannot require a tenant to forfeit a deposit for failing to stay a minimum number of months in a month-to-month tenancy.

What counts as a security deposit in Oregon

This trips people up, so it's worth being precise. Under ORS 90.300, "security deposit" includes any last month's rent deposit. So the money you're calling last month's rent is legally part of the deposit framework, not a separate category you can handle informally.

Last month's rent deposits carry their own rule: you must apply that money to the rent due for the last month of the tenancy when either party gives a notice of termination under the chapter (other than a termination for nonpayment of rent), when both parties agree to terminate, or when a term tenancy ends according to the written rental agreement. Any portion you don't apply that way has to be accounted for and refunded like a deposit.

Prepaid rent is different again. When the tenancy ends, you must account for and refund the unused balance of prepaid rent, and you may claim from it only what's reasonably necessary to cover unpaid rent. Critically, the statute requires a separate accounting for security deposits and for prepaid rent. Lumping them into one statement is a common and avoidable error.

One structural protection worth understanding: the tenant's claim to a deposit or prepaid rent takes priority over the claims of the landlord's creditors, including a bankruptcy trustee, and deposits in the landlord's possession are not garnishable property. Deposit money is held for the tenant, not banked as working capital.

The 31-day clock: when it actually starts

Here's the detail that decides most Oregon deposit disputes. The 31-day period runs from the point at which both things have happened: the tenancy has terminated, and the tenant has delivered possession. Not one or the other. Keys back and tenancy over.

Within those 31 days you have to do two things: give the tenant a written accounting stating specifically the basis or bases of any claim you're making, and return the deposit or the portion you're not claiming.

Delivery method matters too. The statute allows the accounting or the refund to be delivered personally, by first class mail, or by email where that's permitted under the notice-service rules. Returning funds electronically to the tenant's bank account is allowed only if both parties agreed to it in an addendum executed after the tenancy began and after the tenant occupied the premises. You can't bury electronic return in the original lease.

If a tenant hasn't given you a forwarding address, that doesn't pause the clock. Send the accounting to the last known address and keep proof you sent it.

What the written accounting has to say

"A written accounting that states specifically the basis or bases of the claim" is the statutory language, and Oregon case law has read the word specifically seriously. In one long-standing appellate decision, a landlord's message that the tenant could come by the landlord's home to get an accounting was held insufficient to satisfy the duty. The obligation is to affirmatively provide a specific written accounting, not to make one available on request.

Practically, that means each deduction needs to be identified and explained, not summarized as "cleaning and repairs, $600." Invoices, receipts, contractor quotes, and dated photos aren't required by the statute in most of the state, but they're what makes a deduction survive a small claims challenge.

If your deductions exceed the deposit, you still owe the accounting inside 31 days. You then bill the former tenant separately for the balance and pursue it like any other debt.

What you can and cannot deduct

Oregon narrows deductions to two categories: the amount reasonably necessary to remedy the tenant's defaults under the rental agreement (including but not limited to unpaid rent), and the amount reasonably necessary to repair damage to the premises caused by the tenant, not including ordinary wear and tear.

Two features of this are unusually landlord-friendly and worth knowing.

You are not required to actually perform the repair in order to claim its cost against the deposit. The statute says so directly. The claim is for the reasonable cost of the damage, not for a receipt you've already paid.

You may also charge for your own labor at a reasonable hourly rate, and any labor costs you assess for cleaning or repairs must be based on a reasonable hourly rate. "Reasonable" is the operative constraint, and it's where inflated charges get struck down.

You can additionally claim for loss of use of the unit during necessary cleaning or repairs the tenant is responsible for, but only if that work is performed in a timely manner. Sitting on a vacant unit for six weeks and then billing the departed tenant for the downtime won't hold.

What you can't touch: ordinary wear and tear, which is the single most litigated line in any deposit dispute. Faded paint, minor carpet flattening in traffic paths, and normal aging of fixtures are the landlord's cost of doing business.

The carpet-cleaning rule most landlords get wrong

Oregon spells out carpet cleaning as its own conditional deduction, and all three conditions must be satisfied. You may deduct for carpet cleaning (beyond the use of a common vacuum) only if:

1. The cleaning is done with a machine specifically designed for cleaning or shampooing carpets;

2. The carpet was cleaned or replaced after the previous tenancy, or after the most recent significant use of the carpet, and before this tenant took possession; and

3. The written rental agreement provides that the landlord may deduct the cost of carpet cleaning regardless of whether the tenant cleans the carpet before delivering possession.

Condition three is the one that quietly disqualifies a lot of otherwise legitimate charges. If your lease is silent on carpet cleaning, the deduction is vulnerable no matter how dirty the carpet is. This is a five-minute lease amendment that prevents a recurring category of dispute, and it's worth auditing your template for it today.

Double damages: Oregon's enforcement teeth

If a landlord fails to comply with the return requirement, or in bad faith fails to return all or part of a deposit or prepaid rent, the tenant may recover twice the amount withheld without a written accounting, or twice the amount withheld in bad faith.

Two things make this sharper than similar provisions elsewhere. First, the trigger isn't only bad faith. Simply failing to provide the written accounting within the window can expose you to the doubled amount. Second, Oregon appellate decisions have held that a court does not have discretion to reduce the recovery the statute prescribes. A sympathetic explanation for being late doesn't shrink the number.

The practical translation for anyone managing more than a handful of units: the deposit accounting is not a task that can afford to sit in someone's inbox. A missed 31-day deadline converts a routine move-out into a defined financial loss, and it's the one deposit risk that is entirely within your control.

Move-outs cluster, which is exactly why they slip. End-of-month turnover produces several simultaneous 31-day clocks, each with its own start date depending on when keys actually came back, while the same team is coordinating cleaning, repairs, and re-leasing. The failure mode isn't a landlord deciding to keep money they shouldn't. It's a move-out date that never got recorded anywhere, so nobody knew day 31 had arrived. Whatever system you use, the non-negotiable is that possession dates and deadlines live somewhere visible rather than in memory. The same discipline that keeps repair requests from disappearing applies here, and RIOO's guide to managing maintenance requests covers the timestamped documentation habits that make turnover repair charges defensible when a tenant challenges them.

Portland's stricter local rules

If your property is in Portland, the statewide picture above is only the floor. Portland City Code 30.01.087 layers on substantially tighter requirements, and the differences are significant enough that a statewide playbook will put you out of compliance.

Portland does cap deposits. If the deposit includes last month's rent, the landlord may not collect more than an additional one-half of one month's rent as deposit. If last month's rent isn't required, the cap is one month's rent. A conditionally approved applicant may be asked for an additional one-half month, payable in installments over up to three months.

Portland also requires segregation of funds: within two weeks of receipt, deposit and last-month's-rent funds must go into a financial institution account separate from the landlord's personal and business operating accounts, with the institution named in the rental agreement. If the account bears interest, that interest generally belongs to the tenant, subject to a limited administrative deduction.

On deductions, Portland is narrower than the state. Deposit funds may be applied only to fixtures, appliances, equipment, or personal property identified in the rental agreement; routine maintenance, ordinary wear and tear, and costs reimbursed by insurance or warranty are excluded. Flooring repair or replacement is limited to the discrete impacted area rather than the whole unit, and interior painting generally can't be charged except for specific tenant damage or unpermitted painting.

Portland also mandates condition reports with photographs at move-in (shared with the tenant), a tenant addendum window, a final inspection within a week of termination with at least 24 hours' notice, photo documentation of any damage claimed, supporting documentation for labor charges over $200, and a written notice of tenant rights delivered alongside the ORS 90.300 accounting. Noncompliance carries per-violation damages plus actual damages and attorney fees.

Note also that while state law doesn't require a separate trust account for landlords generally, Portland does require segregation, and licensed property managers may have additional trust-account obligations under Oregon real estate licensing rules. If you're licensed, check those separately.

What changed in 2026: holding deposits under HB 3521

One recent change is worth flagging because it's easy to conflate with security deposits, and it isn't one.

House Bill 3521 (2025) amended ORS 90.297, which governs deposits and fees charged in connection with entering a rental agreement, commonly called holding deposits. The changes apply to deposits received on or after January 1, 2026. Broadly, the law tightened when a holding deposit may be collected and how quickly it must be refunded when a landlord doesn't follow through, with a five-day repayment window and a penalty for untimely repayment.

The distinction that matters: a holding deposit paid by an approved applicant to reserve a unit before the lease is signed lives under ORS 90.297, while the security deposit you hold during the tenancy lives under ORS 90.300. Different statute, different rules, different clocks. If your application process collects money before lease signing, review that workflow against the current text of ORS 90.297 rather than assuming the 31-day framework covers it.

Because this is a recent amendment, confirm the current statutory language before relying on any summary, including this one.

Common mistakes checklist

The recurring failures in Oregon deposit disputes are procedural, not philosophical.

• Counting the 31 days from the lease end date instead of from possession actually being delivered

• Providing a vague accounting ("cleaning and repairs") instead of a specific, itemized basis for each claim

• Combining security deposit and prepaid rent into a single accounting

• Charging for carpet cleaning when the lease doesn't authorize it

• Deducting for ordinary wear and tear

• Charging labor at an unreasonable hourly rate, or with no rate documented at all

• Requiring a new or increased deposit inside the first year of the tenancy

• Returning funds electronically without a qualifying addendum signed after occupancy began

• Applying statewide rules to a Portland property

How Oregon's deposit rules should shape your operations

Two habits neutralize almost all of the risk above.

The first is documenting condition at both ends of the tenancy. Oregon doesn't require a move-in condition report statewide (Portland does), but a dated, photographed record of the unit's condition at move-in is what converts an arguable wear-and-tear dispute into a straightforward one. It costs twenty minutes at the start of a tenancy and it's the single highest-return habit in deposit management. That documentation naturally begins at intake, alongside the tenant screening and verification process that already establishes the file for a new tenancy.

The second is keeping the money side clean. Because unpaid rent is a permitted deduction, and because last month's rent and prepaid rent each require their own treatment and their own accounting, your ledger has to be able to distinguish these categories cleanly at move-out. A tidy record of what was owed, what was prepaid, and what was applied when is what a 31-day accounting is built from, which is where a dedicated rent collection and payments system earns its keep at exactly the moment the clock is running.

Oregon's deposit framework rewards landlords who are organized and punishes those who are merely well-intentioned. There's no cap on what you collect, real latitude on what you charge, and no forgiveness at all on when you account for it. Get the possession date recorded, itemize specifically, keep the deposit and prepaid rent separate, and send it inside 31 days. Everything else is detail.

Frequently asked questions

1. Is there a limit on security deposits in Oregon?
Not under state law. ORS 90.300 sets no statutory cap on the amount of a residential security deposit. Local ordinances can impose limits, and Portland does cap deposits, so check the rules for your city before setting an amount.

2. How long does an Oregon landlord have to return a security deposit?
31 days. The landlord must provide a written accounting of any amounts claimed and return the unclaimed balance within 31 days after the tenancy terminates and the tenant delivers possession. Both conditions have to be met before the clock starts.

3. What happens if a landlord misses the 31-day deadline in Oregon?
The tenant may recover twice the amount withheld without a written accounting, or twice any amount withheld in bad faith. Oregon appellate decisions have held that courts lack discretion to reduce this statutory recovery, so being slightly late is not a defense.

4. Does a landlord have to itemize security deposit deductions in Oregon?
Yes. The written accounting must state specifically the basis or bases of the claim. Case law has treated vague or merely available accountings as insufficient, so each deduction should be identified and explained rather than summarized in a lump sum.

5. What can an Oregon landlord deduct from a security deposit?
Only the amount reasonably necessary to remedy the tenant's defaults under the rental agreement, including unpaid rent, and to repair damage caused by the tenant beyond ordinary wear and tear. Landlords may also claim for loss of use during necessary repairs if the work is done in a timely manner.

6. Can an Oregon landlord charge for carpet cleaning?
Only if three conditions are met: the cleaning uses a machine designed for cleaning or shampooing carpets, the carpet was cleaned or replaced before this tenant took possession, and the written rental agreement expressly allows the deduction regardless of whether the tenant cleaned the carpet. If the lease is silent, the charge is vulnerable.

7. Does a landlord have to actually make the repair to charge for it?
No. Oregon's statute expressly provides that a landlord is not required to repair tenant-caused damage in order to claim the cost of that repair against the deposit. Any labor charged must still be based on a reasonable hourly rate.

8. Is last month's rent the same as a security deposit in Oregon?
Legally, a last month's rent deposit is included within the definition of "security deposit," but it has its own application rules and prepaid rent requires a separate accounting from the security deposit. Treat them as distinct line items in your records.

9. Can a landlord increase a security deposit during the tenancy?
Generally not during the first year of the tenancy, with a narrow exception when the parties agree to modify the rental agreement (such as allowing a pet) and the additional deposit relates to that modification. After the first year, the tenant must be given at least three months to pay any new or increased deposit.

10. Does Oregon require security deposits to be held in a separate account?
Not as a general statewide requirement under ORS 90.300. Portland requires deposit funds to be held in an account segregated from the landlord's personal and business accounts, and licensed property managers may have separate trust-account obligations under real estate licensing rules.

11. What changed for holding deposits in 2026?
HB 3521 amended ORS 90.297, which covers deposits and fees charged in connection with entering a rental agreement, for deposits received on or after January 1, 2026. It tightened refund timing and added a penalty for untimely repayment. Holding deposits are governed separately from security deposits under ORS 90.300.

This article is for general informational purposes and is not legal advice. Oregon law changes and local ordinances vary; confirm current requirements with an Oregon attorney before acting. The rules above come from ORS 90.300, Oregon's security deposit and prepaid rent statute, and, for Portland properties, Portland City Code 30.01.087.