Rental Property Depreciation Estimator
Estimate annual depreciation, monthly depreciation, accumulated depreciation, and adjusted basis for a rental property.
How rental property depreciation works
Depreciation is a tax deduction that lets rental property owners recover the cost of income-producing buildings over time. In simple terms, instead of deducting the full building cost in one year, tax rules spread the deduction across a fixed recovery period.
For most U.S. taxpayers:
- Residential rental property is generally depreciated over 27.5 years.
- Commercial rental property is generally depreciated over 39 years.
This calculator gives a clear estimate using straight-line depreciation so you can quickly understand your annual deduction and how depreciation changes your adjusted basis over time.
What this calculator includes
The tool uses a practical input set used by many landlords and real estate investors:
- Purchase price
- Land value allocation
- Capitalized closing costs
- Capital improvements
- Property type (residential vs commercial)
- Optional in-service date and optional years depreciated
- Optional tax rate for an estimated tax-benefit view
The result highlights your depreciable basis, annual depreciation, monthly depreciation, current-year estimate, and accumulated depreciation.
Depreciation formula used
Step 1: Determine depreciable basis
Depreciable Basis = (Purchase Price + Capitalized Closing Costs + Capital Improvements) − Land Value
Because land does not wear out, it is excluded from depreciation.
Step 2: Apply recovery period
Annual Depreciation = Depreciable Basis ÷ Recovery Period
- 27.5 years for residential rental
- 39 years for commercial rental
Step 3: Estimate accumulated depreciation
Accumulated Depreciation = Annual Depreciation × Years Depreciated (capped at depreciable basis)
If you do not enter years depreciated, the calculator estimates elapsed years from the in-service date when available.
Quick example
Suppose you buy a rental property for $400,000, allocate $80,000 to land, add $7,000 in capitalized closing costs, and spend $13,000 on improvements:
- Total cost basis before land = $420,000
- Depreciable basis = $420,000 − $80,000 = $340,000
- Residential annual depreciation = $340,000 ÷ 27.5 = $12,363.64
- Monthly depreciation estimate = $1,030.30
If that property has been depreciated for 6 years, accumulated depreciation would be approximately $74,181.84, subject to convention details and records.
Important tax notes for investors
1) Records matter
Keep settlement statements, improvement invoices, and land allocation documentation. If your numbers are audited, records are your foundation.
2) Improvements vs repairs
Many owners confuse routine repairs with capital improvements. Repairs are usually current expenses; improvements are typically capitalized and depreciated. Misclassification can cause errors in both current-year deductions and long-term basis tracking.
3) Depreciation recapture
When you sell, depreciation taken (or allowable) can trigger recapture tax. This is one reason basis tracking throughout ownership is crucial.
4) Conventions and advanced strategies
This calculator provides an estimate. Actual returns can involve mid-month conventions, partial-year rules, cost segregation studies, and special depreciation categories for certain components.
Common mistakes landlords make
- Depreciating land
- Using 30-year or mortgage terms instead of tax recovery periods
- Ignoring capitalized closing costs
- Failing to add major improvements to basis
- Not tracking accumulated depreciation annually
- Assuming “no depreciation claimed” means no recapture risk
Frequently asked questions
Can I depreciate my primary residence?
Generally, no. Depreciation is primarily for property used in a trade, business, or income-producing rental activity.
Is this calculator enough to file my tax return?
Use it for planning and education. For filing, rely on complete records and a qualified tax professional who can apply your exact facts and current tax law.
What if I refinanced?
A refinance by itself typically does not reset building depreciation. But refinancing can affect other items, so keep lender documents and review with your advisor.
Should I run this annually?
Yes. Running a yearly check helps you monitor deductions, adjusted basis, and potential sale impact.
Educational use only. This page is not tax, legal, or accounting advice.