Commercial Property Depreciation Calculator
Use this commercial property depreciation calculator to estimate depreciable building basis, annual depreciation, monthly depreciation, possible tax benefit, adjusted basis, and potential depreciation recapture for business or investment property planning.
This page focuses mainly on United States real estate and tax planning because GDS, ADS, MACRS recovery periods, land value, building basis, adjusted basis, and recapture are common US tax concepts. People in the UK, Canada, Australia, and similar markets can still use the tool for general education, but local depreciation and capital allowance rules may differ.
Start by choosing the property type. For commercial property and residential rental property, choose GDS or ADS to load a common recovery period. For custom recovery period mode, enter your own recovery period manually because GDS and ADS defaults are not applied. Then enter purchase price, land value, improvements, projection years, and tax rate. Open Advanced assumptions when you want to include placed in service month, prior depreciation, bonus or special depreciation, qualified improvement property, sale price, selling costs, recapture rate, and capital gains assumptions.
What is the Commercial Property Depreciation Calculator?
A commercial property depreciation calculator estimates how the depreciable part of a business or investment property may be written off over time. It separates land from building value because land is generally not depreciated for tax purposes, then applies the selected recovery period to the depreciable building basis.
This tool is not a tax filing tool. It gives a planning estimate so property owners, investors, and advisers can understand depreciation schedules, adjusted basis, tax benefit, and possible sale or recapture impact before reviewing final numbers with a tax professional.
What property depreciation and GDS or ADS mean
Property depreciation is a tax accounting concept that spreads the cost of a qualifying building or improvement over a recovery period. In US planning estimates, GDS often uses 39 years for commercial property and 27.5 years for residential rental property, while ADS often uses 40 years for commercial property and 30 years for residential rental property. Custom recovery period mode is manual and should be used only when the user already knows the recovery period to apply.
The depreciable basis usually starts with building value and qualifying improvements. Land value is separated because it is generally not depreciated. Real property often uses a mid month convention in the first and final year, so the placed in service month can affect the first year estimate. Actual tax treatment can depend on property type, improvements, elections, and current tax law.
How to use the Commercial Property Depreciation Calculator
Start by selecting the property type and, where relevant, the depreciation system. Commercial and residential rental modes can use GDS or ADS defaults. Custom mode leaves the recovery period to the user. Small changes in land value, building basis, recovery period, or prior depreciation can change the estimated annual deduction and adjusted basis.
- Enter the purchase price and estimated land value to separate depreciable building basis from non-depreciable land value.
- Select commercial property or residential rental property, then choose GDS or ADS. If you choose custom recovery period, enter the recovery period manually. Then add improvement costs and review the recovery period years used for the estimate. Real property uses the mid-month convention, so the first placed-in-service month receives one-half month of depreciation.
- Enter the number of years you want to project and an estimated tax rate if you want a rough tax benefit estimate.
- Open Advanced assumptions to include prior depreciation, placed-in-service month, bonus or special depreciation, qualified improvement basis, sale price, selling costs, recapture rate, or capital gains rate.
- Review annual depreciation, monthly depreciation, accumulated depreciation, adjusted basis, estimated tax benefit, and possible recapture or sale impact.
How each input affects the result
Use this guide before filling the calculator. It explains what the main input areas mean, how to enter them, and how each one can change the estimate.
| Input area | What it means | Impact on result |
| Loan amount, home price, or balance | The main mortgage value used by the calculator. | A higher amount usually increases payment, interest, payoff balance, or affordability pressure. |
| Interest rate | The annual rate used in the estimate. | A higher rate usually raises payment and total interest. |
| Loan term or remaining term | How long the loan is spread out. | A longer term usually lowers monthly payment but can increase total interest. |
| Down payment, equity, or extra payment | Cash paid upfront, equity position, or additional principal payment. | It can lower loan balance, reduce interest, change payoff time, or improve approval ratios. |
| Taxes, insurance, PMI, HOA, or fees | Optional housing costs when available. | These increase the full cost estimate and can change affordability or comparison results. |
What your results mean
After calculating, start with the main result card, then use the detail rows to understand why the number changed. This makes it easier to compare scenarios without guessing.
| Result line | What it means |
| Monthly payment | Estimated recurring payment based on the loan and rate assumptions. |
| Total interest or cost | Estimated cost over time when the calculator supports a full-term view. |
| Balance, equity, or payoff result | Shows how the loan amount, remaining balance, or equity changes in the scenario. |
| Comparison result | Shows which option, term, payment method, or assumption may look better under the entered values. |
| Risk or qualification signal | Highlights affordability, DTI, LTV, DSCR, payment shock, or similar planning pressure when supported. |
Example
For example, a $750,000 commercial property with $150,000 allocated to land leaves $600,000 of building basis before improvements. Under GDS with a 39 year recovery period, the straight-line annual depreciation estimate is about $15,384 before any advanced adjustments, special rules, or tax professional review.
Property depreciation formula
- Land is separated because it is generally not depreciated
- Choose GDS or ADS, then choose the property type to load a common recovery period
- Estimated tax benefit depends on the tax rate entered
Depreciation is a tax accounting estimate. Confirm actual treatment, basis, recovery period, system selection, and recapture rules with a qualified tax professional.
Why use this calculator?
Depreciation can affect taxable income, estimated cash flow, adjusted basis, and future sale planning. A clear schedule shows you the annual estimate without mixing it into the mortgage payment calculation.
- Separates land value from depreciable building basis.
- Estimates annual and monthly depreciation amounts.
- Shows accumulated depreciation and adjusted basis over time.
- Adds optional sale, recapture, and capital gain planning assumptions.
- Supports commercial real estate planning without changing mortgage payment formulas.
- Shows common GDS and ADS recovery period defaults for commercial and residential rental property.
Best for
- Commercial property owners estimating depreciation schedules.
- Real estate investors reviewing building basis and deductions.
- Users comparing property income with tax planning estimates.
- Borrowers who already used the commercial mortgage calculator and now want a separate depreciation view.
- Researchers or writers explaining commercial real estate depreciation in simple terms.
Pros and things to check
Potential benefits
- Keeps depreciation separate from loan payment calculations.
- Shows building basis, land value, annual depreciation, and adjusted basis clearly.
- Includes advanced planning inputs for placed in service month, prior depreciation, sale price, recapture, and estimated tax benefit.
- Explains when GDS and ADS defaults are used and when custom recovery period mode is manual.
Important checks
- Actual depreciation rules can be complex and may change by tax year.
- Placed-in-service rules, cost segregation, bonus depreciation, and improvement treatment may require professional review.
- This calculator provides an estimate and should not replace tax advice or filing software.
Commercial property depreciation quick guide
Use this table to understand what this calculator estimates and what still needs professional review.
| Question | What this calculator helps answer |
| Main purpose | Estimate depreciable basis, annual depreciation, accumulated depreciation, adjusted basis, and possible recapture. |
| Commercial defaults | GDS commercial property uses 39 years, while ADS commercial property uses 40 years for this planning estimate. |
| Residential rental defaults | GDS residential rental property uses 27.5 years, while ADS residential rental property uses 30 years for this planning estimate. |
| Custom mode | Custom recovery period mode uses the years entered by the user and does not apply GDS or ADS defaults. |
| Important caution | Land is generally not depreciated, and actual depreciation rules may vary by property type, GDS or ADS selection, custom recovery period, and tax situation. |
| Related tool | Use the Commercial Mortgage Calculator for DSCR, debt service, NOI, and loan payment planning. |
Country and lender note
Mortgage rules and costs vary by market. Use this calculator as an educational planning estimate and confirm final numbers with a qualified local lender, broker, tax adviser, or other relevant professional before making a decision.
FAQs
What is a commercial property depreciation calculator?
It estimates depreciation for the depreciable building or improvement portion of a commercial property. It can show annual depreciation, monthly depreciation, accumulated depreciation, adjusted basis, tax benefit, and possible recapture planning amounts.
Does land depreciate?
Land is generally not depreciated. This calculator separates land value from building value so the depreciation estimate focuses on the depreciable portion of the property.
What is GDS in property depreciation?
GDS means General Depreciation System. In this calculator, GDS uses common planning defaults of 39 years for commercial property and 27.5 years for residential rental property.
What is ADS in property depreciation?
ADS means Alternative Depreciation System. In this calculator, ADS uses common planning defaults of 40 years for commercial property and 30 years for residential rental property.
How does custom recovery period mode work?
Custom mode does not apply GDS or ADS defaults. It uses the recovery period years entered by the user, so it should be used only when the user already knows the correct period to apply.
Does the calculator use mid month convention?
Yes. The calculator uses a simplified mid month convention for real property planning, so the placed in service month affects the first year depreciation estimate.
Does this calculator include depreciation recapture?
Yes, the advanced section can estimate possible depreciation recapture using the accumulated depreciation and recapture rate you enter. It is a planning estimate only.
Is this tax advice?
No. This calculator is for educational planning. Depreciation, MACRS, GDS, ADS, cost segregation, bonus depreciation, improvements, and recapture can be complex, so final numbers should be reviewed by a qualified tax professional.
How do I use the Commercial Property Depreciation Calculator?
Enter the main loan, price, rate, term, payment, debt, or cost values requested by the tool. Start with realistic estimates, then change one field at a time to compare the result.
What result should I check first?
Start with the main payment, affordability, savings, payoff, or comparison result at the top of the calculator. Then review the table or breakdown to understand what creates that result.
Does this calculator include taxes, insurance, PMI, or fees?
It includes those items only when the page has fields for them. Mortgage taxes, insurance, PMI, closing costs, escrow, and lender fees can vary, so use local estimates where needed.
Can I enter zero for optional mortgage fields?
Yes. Optional fields such as extra payment, PMI, growth, points, fees, or debts should stay zero when you enter 0. The calculator should not replace a real zero with a default amount.
Why can my lender quote be different?
A lender quote can include credit score, underwriting rules, escrow treatment, exact fees, points, tax estimates, insurance, and local requirements that a planning calculator cannot fully know.
Can this help compare mortgage scenarios?
Yes. Use the same core assumptions, then adjust one item such as rate, term, down payment, extra payment, or cost to see how the estimate changes.
Is the Commercial Property Depreciation Calculator result exact?
No. It is a planning estimate based on your inputs. Confirm final mortgage numbers with a lender, broker, tax adviser, or qualified professional before making a decision.