IRS Depreciation Calculator — The 27.5-Year Rental Tax Deduction

The IRS lets landlords deduct the cost of a residential rental over 27.5 years — a 'paper loss' that can offset rental income. This guide explains straight-line depreciation, land exclusion, and recapture.

A rental depreciation calculator quantifies one of the most powerful tax breaks in real estate: the IRS allows you to deduct the cost of a residential rental property (excluding land) evenly over 27.5 years (IRS Pub 527). This "paper loss" reduces taxable rental income even as the building may appreciate in value.

The Straight-Line Basics

Only the building depreciates, never the land. A typical allocation sets land at 20% of purchase price. For a $320,000 home with 20% land:

Depreciable basis = $320,000 × 80% = $256,000

Annual deduction = $256,000 ÷ 27.5 = $9,309/year

That $9,309 is a non-cash deduction: you don't write a check, but it lowers the income the IRS taxes.

Mid-Month Convention

The IRS uses a mid-month convention: in the year you place the property in service, you deduct half a month regardless of the actual day. This slightly reduces year-one deductions but is automatic in most tax software.

Land Allocation Matters

Push land too low and the IRS may reclassify it; too high and you forfeit deductions. 15–25% land is common for single-family homes, higher in dense urban lots. Document your allocation with the appraisal.

Depreciation vs. Cash Flow

Depreciation is a tax concept, not a cash item. It does not change your bank balance but changes your tax bill. A property with $500/month positive cash flow might show a tax loss after depreciation — sheltering other income (subject to passive-activity loss rules).

Depreciation Recapture

When you sell, the IRS "recaptures" depreciation at a maximum 25% rate (IRC §1250), separate from capital gains. The more you deducted, the larger the recapture. A 1031 exchange can defer both — see our 1031 exchange calculator.

Cost Segregation (Advanced)

A cost-segregation study breaks the building into components (appliances, landscaping, roofs) that depreciate faster (5, 7, 15 years), front-loading deductions. It costs $2,000–$10,000 and pays off on higher-value properties. Not needed for a typical SFR but powerful for multi-family.

Commercial vs. Residential

Commercial property depreciates over 39 years. If you buy a mixed-use or short-term property that doesn't qualify as residential rental, your deduction drops. Classify carefully.

Common Mistakes

1. Depreciating land — not allowed; pure audit risk.
2. Forgetting to start the clock in the in-service year.
3. Ignoring recapture at sale and the 25% hit.
4. Skipping cost-seg on large deals that would benefit.

Can You Actually Use the Loss? Passive-Activity Rules

Depreciation often turns a cash-flowing rental into a paper loss — but whether that loss reduces this year's tax bill depends on the passive-activity rules (IRC §469). Rental losses are passive by default and can only offset passive income. Two commonly cited exceptions matter for individual landlords. First, the $25,000 special allowance: if you "actively participate" (approve tenants, set rents) and your modified AGI is $100,000 or less, you can deduct up to $25,000 of rental losses against ordinary income; the allowance phases out completely at $150,000 MAGI. Second, real-estate-professional status: 750+ hours and more than half your working time in real property trades lets losses go non-passive, but the bar is high and heavily audited. Losses you cannot use are not wasted — they carry forward as suspended losses and release when the property produces passive income or when you sell. Model your bracket and MAGI with a CPA before counting the deduction as cash.

Repair vs. Improvement: What Gets Expensed, What Gets Depreciated

Not every dollar you spend joins the 27.5-year schedule. A repair (fixing a leak, patching a roof section, repainting) is deductible in full the year you pay it. An improvement (new roof, kitchen remodel, HVAC replacement) must be capitalized and depreciated — the building shell over 27.5 years, some components faster. The commonly used IRS safe harbors help small landlords: the de minimis safe harbor lets you expense items up to $2,500 per invoice, and the small-taxpayer safe harbor can let you expense building work up to the lesser of $10,000 or 2% of the building's unadjusted basis in a year. Classify aggressively but honestly, and keep invoices — the repair/improvement line is one of the most common audit questions for landlords.

Planning the Exit: Depreciation Is a Loan, Not a Gift

Every dollar of depreciation lowers your basis, which raises the gain (and the 25% recapture bill) at sale. Three exit paths change the outcome dramatically: sell outright and pay recapture plus capital gains; roll into a 1031 exchange and defer both; or hold until death, where heirs receive a stepped-up basis and the recapture liability effectively disappears under current law. Which path you intend to take should shape how hard you push depreciation today — a cost-seg front-load makes most sense when the plan is a long hold or a 1031 chain, and least sense before a quick taxable flip.

Using the Calculator Below

Enter purchase price, land %, property type, income, and expenses. The tool returns annual depreciation, the 27.5-year schedule, and estimated tax savings at your bracket. Load the sample and test your numbers.

Disclaimer: Depreciation rules are detailed and fact-specific. This is educational; work with a licensed CPA (IRS Pub 527/946) for your return.

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