Seattle’s rental market can be attractive to real estate investors, but owning a rental property also means navigating a tax system with plenty of rules about what you can deduct, when you can deduct it, and how much of a rental loss you can actually use.
The good news is that rental-property owners can deduct many of the ordinary and necessary expenses involved in operating a property. The catch is that some of those deductions are limited, deferred, or subject to special rules.
Understanding those limits is particularly important if your Seattle rental property is generating a tax loss on paper. A $30,000 rental loss doesn’t necessarily mean you get a $30,000 deduction against your salary or other income this year.
Here’s how the major rental-property write-off rules work.
What Rental Property Expenses Can You Deduct?
For a typical residential rental property, deductible expenses may include:
- Mortgage interest
- Property taxes
- Insurance
- Repairs and maintenance
- Utilities paid by the landlord
- Property management fees
- Advertising
- Legal and professional fees
- Certain travel and transportation expenses
- Depreciation
These expenses are generally reported on Schedule E of your federal tax return. (irs.gov)
The important distinction is between repairs and improvements.
A repair generally keeps the property in its existing condition. Fixing a broken window or repairing a leaky faucet, for example, may be currently deductible.
An improvement, on the other hand, generally adds value, adapts the property to a new or different use, or substantially prolongs its useful life. A new roof, kitchen remodel, addition, or major HVAC installation generally needs to be capitalized and depreciated rather than deducted all at once.
That’s why “I spent $20,000 fixing up my rental” isn’t enough information to determine your deduction. You need to know what the $20,000 was actually spent on.
Depreciation: One of the Biggest Rental Property Deductions
Depreciation allows you to recover the cost of qualifying property over time, even though you may not be writing a check for that expense each year.
For most residential rental buildings, the building portion is depreciated over 27.5 years under the Modified Accelerated Cost Recovery System (MACRS).
Nonresidential real property generally uses a 39-year recovery period. Land generally isn’t depreciable.
Importantly, you don’t depreciate the entire purchase price of a rental property. The cost generally has to be allocated between depreciable improvements and land, because land isn’t depreciable.
This is one reason a proper depreciation schedule matters.
Passive Loss Limits: The $25,000 Special Allowance
Here’s where rental-property taxes get more complicated.
Rental real estate is generally considered a passive activity, even if you’re actively involved in managing the property. That means rental losses generally can’t simply be deducted against your W-2 wages or other nonpassive income.
There is, however, a special exception for rental real estate owners who actively participate in their rental activities.
If you qualify, you may be able to deduct up to $25,000 of rental real estate losses against nonpassive income.
But the $25,000 allowance isn’t available to everyone.
For taxpayers with modified adjusted gross income (MAGI) of $100,000 or less, the full allowance may be available, assuming the other requirements are met. The allowance generally phases out as MAGI increases from $100,000 to $150,000 and disappears at $150,000 of MAGI. For married taxpayers filing separately who lived apart from their spouse for the entire year, the corresponding figures are generally $12,500, $50,000, and $75,000.
So if you earn $250,000 from your job and your rental property generates a $30,000 loss, you generally can’t just deduct that $30,000 against your wages under the special $25,000 allowance.
That doesn’t necessarily mean the loss disappears.
What Happens to Rental Losses You Can’t Deduct?
If a rental loss is limited by the passive activity rules, the unused portion generally becomes a suspended passive loss.
You don’t necessarily lose it forever.
Suspended losses can generally be carried forward and may become deductible in a future year when you have sufficient passive income or otherwise satisfy the rules allowing the loss to be used.
There can also be an important opportunity when you dispose of your entire interest in a passive activity in a fully taxable transaction. In that situation, previously suspended passive losses may become deductible, subject to the applicable rules.
In other words, a rental property showing a tax loss doesn’t necessarily mean you’ve wasted the deduction. It may simply mean you’re not allowed to use it yet.
Don’t Forget the At-Risk Rules
There’s another limitation that comes before the passive activity rules: the at-risk rules.
Generally, you’re limited in the amount of a rental-property loss you can deduct to the amount you’re economically considered to have at risk in the activity. Certain debt and financing arrangements can affect that calculation.
The IRS applies these rules before the passive activity limitations.
That means determining whether you can deduct a rental loss can involve several layers:
First: Are the expenses actually deductible?
Second: Are you allowed to deduct the resulting loss under the at-risk rules?
Third: If so, are you allowed to use the loss under the passive activity rules?
Finally: Are there other limitations that apply?
That’s why simply adding up your rental expenses and subtracting them from rent isn’t always enough to determine your actual tax deduction.
The De Minimis Safe Harbor for Small Purchases
Not every piece of property you purchase for a rental needs to become a multi-year depreciation project.
The IRS provides a de minimis safe harbor that can allow qualifying taxpayers to deduct certain amounts paid for tangible property rather than capitalizing and depreciating them.
For taxpayers without an applicable financial statement, the safe harbor generally applies to property costing $2,500 or less per invoice or item, assuming the applicable requirements are met. Taxpayers with an applicable financial statement generally have a $5,000 threshold.
This can be useful for landlords who regularly purchase smaller items for their properties.
But don’t interpret the $2,500 threshold as “anything under $2,500 is automatically deductible.” The safe harbor is an election with specific requirements, and other rules can apply.
There is also a separate safe harbor for certain routine maintenance costs.
What About Section 179 and Bonus Depreciation?
This is another area where older rental-property articles can give you bad information.
The federal bonus-depreciation rules changed significantly under the One Big Beautiful Bill Act.
For certain qualifying property acquired and placed in service after January 19, 2025, the additional first-year depreciation deduction was restored to 100%.
That does not mean you can automatically deduct 100% of the cost of a rental building.
Residential rental buildings generally remain subject to the 27.5-year depreciation rules, and commercial buildings generally remain subject to 39-year depreciation. Bonus depreciation applies to qualifying property, which can include certain shorter-lived components and personal property associated with a rental operation.
This is one reason cost segregation can be useful for some real estate investors.
How Cost Segregation Can Accelerate Deductions
A cost segregation study examines a property and identifies components that may qualify for shorter depreciation periods rather than treating everything as part of the building.
For example, certain appliances, flooring, fixtures, equipment, and other components may have shorter recovery periods than the underlying building.
If those components qualify for accelerated depreciation or bonus depreciation, a cost segregation study can potentially move deductions that would otherwise occur over many years into earlier tax years.
That can be particularly valuable for investors who have substantial taxable income and can actually use the deductions.
But there’s an important caveat:
A bigger paper loss isn’t automatically a bigger current-year tax benefit.
If your passive losses are already suspended, accelerating additional depreciation may simply increase the amount of suspended loss rather than immediately reducing your tax bill.
Cost segregation is therefore a tax-planning decision, not simply a “take the biggest deduction possible” exercise.
What About Short-Term Rentals?
Short-term rentals can be treated differently from traditional long-term residential rentals.
For federal tax purposes, one important rule is that an activity generally isn’t treated as a rental activity for passive-activity purposes if the average period of customer use is seven days or less, or 30 days or less under certain circumstances where significant personal services are provided. Other rules then determine whether the activity is passive based on your level of participation.
That means an Airbnb or other short-term rental isn’t automatically subject to the same passive-loss treatment as a traditional long-term rental.
But don’t assume that short-term rental status automatically means you can deduct unlimited losses against your salary.
You generally need to establish material participation under the applicable rules, and the analysis can become complicated when you use a property personally, hire a property manager, or operate multiple rental activities.
Seattle Short-Term Rental Taxes Are a Separate Issue
Federal income-tax treatment is only part of the picture for a Seattle short-term rental.
Washington treats many rentals of less than 30 days as transient lodging. Depending on the circumstances, owners may have obligations involving retail sales tax, retailing B&O tax, and various lodging-related taxes.
If you’re using Airbnb or another marketplace, don’t automatically assume the platform has taken care of every tax obligation.
Washington’s Department of Revenue notes that some marketplace facilitators collect certain taxes on behalf of hosts, but property owners may still have registration and reporting responsibilities.
Long-term rentals are different. Washington generally doesn’t impose B&O or retail sales tax on a qualifying rental or lease of real estate where the tenant has exclusive use and the rental period meets the state’s requirements.
So don’t assume that the tax rules for a 12-month tenant and a two-night Airbnb guest are interchangeable.
They’re not.
Seattle-Specific Considerations
Seattle investors also need to keep local requirements in mind.
For example, Seattle’s B&O tax rules changed significantly beginning January 1, 2026. The city’s threshold increased from $100,000 to $2 million of annual taxable revenue, although businesses below the threshold still have filing and reporting requirements.
For a traditional long-term rental, however, don’t confuse Seattle’s business tax rules with the federal income-tax treatment of rental property. Different taxes have different definitions and rules.
If you operate a short-term rental business, provide additional services to guests, or otherwise operate the property more like a lodging business, the local tax analysis can be different.
Keep Your Rental Records Organized
One of the easiest ways to miss legitimate deductions—or accidentally claim deductions you can’t support—is poor recordkeeping.
Keep documentation for:
- Mortgage interest
- Property taxes
- Insurance
- Repairs and maintenance
- Improvements
- Property management
- Advertising
- Utilities
- Professional fees
- Travel and mileage
- Rental income
- Major purchases
- Depreciation and cost-segregation studies
And keep improvements separate from repairs.
If you spend $15,000 replacing a roof, don’t simply throw the invoice into a generic “repairs” folder and forget about it. The tax treatment may be very different from a $300 plumbing repair.
Good records also become extremely important when you eventually sell the property because depreciation and improvements affect your adjusted basis and the calculation of your taxable gain.
The Bottom Line
Owning a rental property can provide income, appreciation, and valuable tax deductions. But the phrase “tax write-off” makes rental-property taxation sound much simpler than it actually is.
You may be able to deduct ordinary operating expenses, mortgage interest, property taxes, depreciation, and other qualifying costs. But at-risk rules, passive activity limitations, income thresholds, depreciation rules, and the distinction between repairs and improvements can all affect when and how much of those deductions you actually get to use.
For Seattle investors, short-term rentals add another layer because Washington and local lodging taxes can come into play alongside your federal income-tax return.
And if you’re considering a cost segregation study, major renovation, short-term rental conversion, or purchase of another investment property, the best time to discuss the tax consequences is before you make the transaction.
A rental-property CPA can help you determine not just what you can deduct, but whether you’ll actually be able to use those deductions this year—and how today’s decisions may affect your taxes when you eventually sell.
General Information Note: This article provides general information and should not be construed as definitive legal or tax advice. Tax laws and individual circumstances change frequently. Consult a qualified tax professional regarding your specific situation.