Rental Property Depreciation: A Washington Owner's Guide

Of every tax break available to a Vancouver, WA landlord, rental property depreciation is the one most owners understand least — and underuse most. It's the deduction that lets a property generating positive cash flow still show a loss on paper, quietly sheltering your rent from federal tax year after year. Yet because it's a "phantom" expense you never actually write a check for, plenty of owners either ignore it or get the math wrong. This guide breaks down exactly how depreciation works, how to calculate it, what happens when you sell, and where it intersects with the repairs-vs-improvements line that drives so many landlord tax mistakes.

This isn't tax advice — depreciation schedules get specific to your basis and purchase documents, so confirm the numbers with a CPA. But understanding the mechanics is what lets you claim the full deduction you've already earned.

What Depreciation Actually Is

The IRS treats a rental building as an asset that wears out over time. Rather than letting you deduct its entire cost the year you buy it, the tax code spreads that cost across the building's "useful life" as an annual deduction called depreciation. For residential rental real estate, that useful life is fixed at 27.5 years under the straight-line method, so you deduct roughly 1/27.5 — about 3.636% — of the building's value every year.

The magic is that it's a non-cash deduction. You're writing off a portion of a building you bought once, without spending another dollar that year. So even a rental that nets you positive cash flow can post a tax loss after depreciation, lowering — sometimes eliminating — the federal tax on that year's rent. And because Washington has no state income tax, this deduction works entirely on your federal return; there's no state-level depreciation calculation to worry about, as we explain in is rental income taxable in Washington.

You Depreciate the Building — Never the Land

Here's the rule that catches new owners: land cannot be depreciated. Land doesn't wear out, so the IRS won't let you recover its cost over time. That means before you can calculate depreciation, you have to split your total purchase price into two buckets — land (not depreciable) and building/improvements (depreciable).

The most common and defensible way to make that split is to use your county assessor's ratio of land value to improvement value. If your Clark County assessment values the land at 25% and the structure at 75%, you apply that 75% to your purchase price to find the depreciable basis. On a $450,000 purchase, that's a $337,500 building basis — and roughly $12,272 a year in depreciation ($337,500 ÷ 27.5). The higher the building-to-land ratio you can legitimately support, the larger your annual deduction, so the allocation is worth getting right.

What Counts in Your Depreciable Basis

Your basis isn't just the sticker price. It also includes many of the closing costs that became part of acquiring the property — title fees, recording fees, transfer taxes, and legal fees, among others. Capital improvements you make later are added to basis and depreciated too (more on that below). Keep your closing statement and every improvement invoice — they're the backbone of an accurate depreciation schedule and your defense in an audit.

How to Calculate Your Annual Depreciation

The straight-line calculation is simple once you have the building basis:

• Step 1 — Allocate: Multiply your purchase price (plus capitalized closing costs) by the assessor's improvement ratio to get the building basis.
• Step 2 — Divide: Divide the building basis by 27.5 to get your full annual depreciation.
• Step 3 — Prorate year one: The IRS uses the "mid-month convention," so your first year is prorated based on the month the property was placed in service (made available for rent), not the month you closed.

You report it each year on IRS Form 4562 and carry the deduction onto Schedule E. A good property manager's year-end financial reports give your CPA the income and expense figures; your depreciation schedule layers on top of those.

Depreciating Improvements: Where Repairs vs. Improvements Comes In

Depreciation isn't just for the building you bought — it also governs how you write off major work you do later. This is where the most important distinction in landlord taxation lives: repairs vs. improvements.

• A repair keeps the property in its current working condition — fixing a faucet, patching drywall, repainting a room. It's deducted in full the year you pay it.
• An improvement — a betterment, restoration, or adaptation under the IRS "BAR" test — adds value, extends the property's life, or adapts it to a new use. It must be capitalized and depreciated, not deducted at once. A new roof, a kitchen remodel, or a full HVAC replacement are improvements.

An improvement gets its own depreciation schedule starting when it's placed in service. A $20,000 roof replacement, for example, is depreciated over 27.5 years rather than deducted immediately. Getting this classification right is worth real money — and the line is subtle. We dedicate a full guide to drawing it correctly, including the safe harbors that let you expense more upfront, in how much you can write off for repairs on a rental property.

Speeding It Up: Cost Segregation and Bonus Depreciation

Not everything in a rental depreciates over 27.5 years. Certain components — appliances, carpeting, cabinetry, landscaping, and other personal-property and land-improvement items — have much shorter recovery periods of 5, 7, or 15 years. A cost segregation study is an engineering-based analysis that breaks your property into these faster-depreciating components, front-loading deductions into your early ownership years when they're most valuable.

Those shorter-life components may also qualify for bonus depreciation, which can let you deduct a large percentage of their cost immediately rather than over years. Bonus depreciation rules and percentages change with federal tax legislation, so confirm the current-year rate with your CPA before counting on it. Cost segregation costs money to perform and makes the most sense on higher-value or multi-unit properties — but for the right owner, it can dramatically accelerate the tax benefit.

The Catch: Depreciation Recapture at Sale

Depreciation isn't free money — it's a deferral. When you sell, the IRS "recaptures" the depreciation you claimed over the years and taxes it at a federal rate of up to 25%. So the deduction that sheltered your rent along the way comes partly due at the finish line.

The most important thing to understand about recapture: you owe it whether or not you actually claimed the depreciation. The IRS calculates recapture on the depreciation you were allowed to take. Skip depreciation to "keep it simple," and you lose the annual deduction and still get hit with recapture at sale — the worst of both worlds. That's why the universal advice is to claim depreciation every single year.

The good news for Washington owners planning an exit: a 1031 like-kind exchange defers both capital gains and depreciation recapture by rolling the proceeds into another investment property. We walk through the deadlines and mechanics in how to do a 1031 exchange in Washington, and cover the full sale-time tax picture in capital gains tax when you sell a rental in Washington.

Depreciation is the rare deduction the IRS will tax you on whether you take it or not. Claim it every year, allocate the basis carefully, and plan the recapture before you ever list the property.

Common Depreciation Mistakes to Avoid

• Depreciating the land: Including land in your basis overstates the deduction and invites adjustment in an audit.
• Skipping depreciation: You still owe recapture at sale, so not claiming it just forfeits the annual benefit.
• Misclassifying improvements as repairs: Deducting a capital improvement all at once is a common audit trigger — capitalize and depreciate it instead.
• Forgetting to add improvements to basis: Capital improvements increase your basis and create new depreciation; leaving them off costs you deductions.
• Losing the paperwork: Without your closing statement and improvement invoices, you can't substantiate the schedule.

Frequently Asked Questions

How does rental property depreciation work?

The IRS lets you recover the cost of a residential rental building (but not the land) by deducting it evenly over 27.5 years using the straight-line method. A building with a $275,000 depreciable basis yields about $10,000 in annual depreciation — a non-cash deduction that lowers your taxable rental income.

Can you depreciate the land under a rental property?

No. Land doesn't wear out, so it can't be depreciated. Allocate your purchase price between land and building — often using the county assessor's ratio — and depreciate only the building portion.

What is depreciation recapture when I sell?

At sale, the IRS recaptures the depreciation you claimed (or were entitled to claim) and taxes it at a federal rate of up to 25%. You owe it even if you never deducted the depreciation, which is why claiming it every year matters.

Is depreciation optional?

Effectively no. Recapture is based on the depreciation you were allowed to take, claimed or not. Skipping it forfeits the annual deduction without avoiding recapture, so you should claim it every year you own the property.

What's the difference between a repair and an improvement?

A repair keeps the property working and is deducted in full the year you pay it. An improvement (betterment, restoration, or adaptation) must be capitalized and depreciated over 27.5 years. See our repairs write-off guide for the full line-drawing.

Sources: IRS Publication 527, Residential Rental Property and IRS Form 4562 (Depreciation and Amortization). Verified June 2026.

This article provides general information only and does not constitute tax advice. Consult a qualified tax professional for guidance specific to your situation. For questions about managing your Vancouver, WA rental, contact VPMG at (360) 803-2002.

Written by Avenir Gedarevich, Washington State Designated Broker (License #25011405) at VPMG Property Management in Vancouver, WA.