Residential Rental Property Depreciation: How It Works

What is residential rental property depreciation?

Residential rental property depreciation is the IRS-allowed deduction that lets you write off the cost of a rental building (not the land) over 27.5 years using the straight-line method. In plain terms: the tax code assumes your building wears out a little every year, so you get to deduct roughly 1/27.5 — about 3.636% — of the building's value annually as a paper expense that offsets rental income.

That paper expense is one of the most powerful reasons buy-and-hold real estate builds wealth so efficiently. It reduces taxable income without costing you a dollar of cash flow. Understand it well and you'll underwrite deals more accurately and keep more of every rent check.

The core mechanics: land vs. building

You can only depreciate the improvements — the structure — not the dirt underneath it. So the first job is splitting your purchase price into land and building.

A common, defensible approach is to use the ratio from your county tax assessor. Say you buy a single-family rental for $300,000 and the assessment shows:

• Land: $60,000 (20%)
• Improvements: $240,000 (80%)

Apply that 80% to your purchase price. Your depreciable basis is roughly $240,000.

Don't forget to add capitalized closing costs (title fees, recording, some legal costs) to basis. Loan points and prepaid interest are handled separately, so keep them out of your building basis.

The annual number

Divide the depreciable basis by 27.5:

• $240,000 ÷ 27.5 = $8,727 per year

That's roughly $727 a month in deductions that never leaves your bank account. On a property netting $4,000 of taxable cash flow before depreciation, this deduction can wipe out the entire tax bill on that income — and often creates a paper loss.

A worked example that shows the real benefit

Run the full picture on that $300,000 rental:

• Gross rent: $27,600/year ($2,300/mo)
• Operating expenses: $9,600
• Mortgage interest (year one): $11,500
• Net before depreciation: $6,500
• Depreciation: $8,727
• Taxable income: $6,500 − $8,727 = −$2,227

You collected positive cash flow, yet you report a taxable loss. That's the magic of depreciation: it converts real income into shelterable, sometimes tax-free, cash. If you qualify to use that loss (more on that below), it can even offset other income.

This is exactly the kind of after-tax reality that separates a good deal from a mediocre one, and it's why serious investors lean on total-return thinking for buy-and-hold rather than cash flow alone.

When depreciation starts and stops

• Starts when the property is placed in service — ready and available to rent — not when you close.
• First and last year are prorated using the mid-month convention. Place a property in service in June and you get about 6.5 months of depreciation that year.
• Ends after 27.5 years, or when you sell, whichever comes first.

Component depreciation and cost segregation

Not everything depreciates over 27.5 years. Appliances, carpet, and certain fixtures can run on 5- or 15-year schedules. A cost segregation study breaks a property into these faster buckets to front-load deductions.

On larger deals, this can accelerate tens of thousands of dollars of deductions into the early years — powerful if you can use the losses. On a modest single-family rental, the study cost may not justify the benefit. Run the math before paying for one.

The risks and pitfalls to watch

Depreciation is a benefit, but it's a loan from the IRS, not a gift. Know the traps.

Depreciation recapture

When you sell, the IRS "recaptures" the depreciation you took (or should have taken) and taxes it — currently up to 25%. Two hard lessons:

• You owe recapture on the depreciation you were allowed to take, even if you never claimed it. Skipping depreciation doesn't skip the tax.
• Recapture can turn a clean-looking sale into a surprise bill. A 1031 exchange can defer it — plan the exit before you buy.

Passive activity loss limits

Those paper losses usually can't offset your W-2 income unless:

• Your income is under the phase-out and you actively participate (up to $25,000 of losses allowed, phasing out between $100k–$150k MAGI), or
• You qualify as a real estate professional, or use short-term rental strategies with material participation.

Otherwise, losses suspend and carry forward until you have passive income or sell. Not worthless — just deferred.

Basis and record-keeping mistakes

• Depreciating land (an audit magnet).
• Losing track of capital improvements that should be added to basis and depreciated separately.
• Failing to adjust basis for casualty losses or partial dispositions.

Keep a running basis schedule from day one. Your future self — and your CPA — will thank you.

How this shapes the way you underwrite

Depreciation changes the deal, so model it before you buy, not at tax time. When you're comparing two rentals with similar cash flow, the one with a higher building-to-land ratio and more depreciable components may quietly deliver a materially better after-tax return.

That's why underwriting on real numbers matters. When you analyze a property with PropertyWiz AI, it pulls live, verified data — value, taxes, rent, insurance — and pre-populates the inputs, so you're stress-testing a real deal instead of guessing your way through a spreadsheet. Pair that with an honest read on cash-on-cash vs. cap rate and you'll see which deals actually deliver on an after-tax basis.

Depreciation isn't a loophole — it's a core part of the return. Treat it as a line item in every analysis, plan for recapture on the way out, and confirm your specific situation with a tax professional.