Real Estate Tax Calc
The non-cash deduction
Depreciation is unusual because it is a deduction you take without spending a dollar. Your rental may generate positive cash flow, yet the depreciation write-off can reduce the taxable income from that property to a small number — or even a paper loss — while the cash stays in your pocket.
Example: a rental collects $24,000 in rent and has $14,000 of operating expenses and mortgage interest, plus $8,700 of annual depreciation on a $240,000 building. Cash flow before loan principal is about $10,000, but taxable income is only $24,000 − $14,000 − $8,700 = $1,300. You keep roughly $10,000 of cash while being taxed on $1,300 — a very low effective rate on the money you actually received.
Passive losses and who can use them
When depreciation pushes a rental into a paper loss, the passive activity loss rules govern whether you can use that loss against other income. Rental real estate is generally passive, so losses first offset other passive income. Active participants who meet the income test may deduct up to $25,000 of rental losses against ordinary income; that allowance phases out between $100,000 and $150,000 of modified adjusted gross income.
Two groups get more room: those who qualify as a Real Estate Professional and materially participate, and short-term rental operators whose average guest stay is seven days or less with material participation. For them, rental losses can offset wage or business income, sharply cutting the effective rate on that income too. Losses you cannot use now are not lost — they carry forward and free up when you have passive income or sell the property.
It is a deferral, not free money
Depreciation lowers today's effective tax rate, but it also lowers your basis, which raises your gain at sale. The depreciation you claimed is recaptured then, at a rate capped at 25%. The advantage is still real for two reasons: you deducted at your ordinary marginal rate (often above 25%) but repay capped at 25%, and you had years of tax-deferred cash compounding in the meantime.
You can extend the deferral with 1031 exchanges, and a step-up in basis at death can eliminate the recapture altogether. That combination is why depreciation is one of the most valuable features of owning rental real estate.
How the deduction is computed
The shelter comes from a fixed formula, not a judgment call. Residential rental buildings are depreciated straight-line over 27.5 years (39 years for commercial) under MACRS. You first split your cost basis between land, which is never depreciable, and the building, which is. If you paid $300,000 for a rental and the county assessor's ratio attributes 20% to land, your depreciable basis is $240,000 and your annual deduction is $240,000 ÷ 27.5 ≈ $8,727 — the same figure used in the example above.
That deduction runs every year for 27.5 years regardless of the property's market value, your mortgage balance, or how much rent you collect. It is reported on Form 4562 in the first year and flows to Schedule E thereafter. Because the amount is set by a formula, the tax shelter is predictable: you can project years in advance how much of your rental cash flow will escape current tax.
Cost segregation turns up the dial
A cost segregation study accelerates the shelter by carving the building into shorter-life components — 5-year (appliances, carpet, specialty wiring), 7-year (certain furnishings), and 15-year (land improvements like driveways, fencing, and landscaping) — instead of depreciating everything over 27.5 years. Those shorter-life components are eligible for bonus depreciation, which the One Big Beautiful Bill Act restored to 100% for property placed in service after January 19, 2025.
The effect on the effective rate can be dramatic. If a study reclassifies $60,000 of a building into bonus-eligible components, you may deduct that entire $60,000 in year one instead of about $2,180 of it. For an investor who can use the loss, that single move can drop the effective tax rate on the year's rental income — and sometimes other income — to zero. The trade-off is larger recapture later and the professional cost of the study, so it pays best on higher-value properties held by investors who can actually use the accelerated loss now.
A note on the phantom-income flip side
Depreciation's shelter is finite, and understanding when it ends prevents an unpleasant surprise. After 27.5 years the building is fully depreciated and the annual deduction disappears, while rent (and often your mortgage-interest deduction, which shrinks as the loan amortizes) keeps changing. Late in a hold, a property that once sheltered its cash flow can flip to producing taxable income above its cash flow — so-called phantom income — because the paper deductions that used to offset it are gone.
This is not a reason to avoid depreciation; it is a reason to plan the exit. Many long-term owners use a 1031 exchange into a larger property to reset a fresh depreciation schedule, or sell and redeploy, precisely when the original property's shelter runs thin. Knowing the shelter has a shelf life turns depreciation from a happy accident into a deliberate holding-period strategy.
Why you cannot skip it to avoid the tradeoff
Some owners, disliking the recapture that follows, are tempted to simply not claim depreciation. The tax code forecloses that: recapture is computed on depreciation allowed or allowable, meaning the IRS taxes you at sale on the depreciation you could have taken whether or not you actually claimed it. Skipping the deduction therefore gives up the annual tax shelter while still owing the recapture — the worst of both worlds.
If you did fail to claim depreciation in prior years, the fix is not to amend a string of returns but to file Form 3115, Application for Change in Accounting Method, and take a catch-up deduction (a Section 481(a) adjustment) that restores the missed depreciation in a single year. That single-year deduction can itself sharply lower the effective rate in the year you file it. The lesson is the same either way: claim the depreciation, use the shelter, and plan for the recapture rather than trying to dodge it.
Putting a number on the effective rate
To see the shelter concretely, compare tax with and without depreciation on the earlier example. The rental collected $24,000, had $14,000 of operating expenses and interest, and $8,700 of depreciation. Without depreciation, taxable income is $10,000; at a 24% marginal rate that is $2,400 of tax on roughly $10,000 of cash — an effective rate near 24%. With depreciation, taxable income is $1,300, tax is about $312, and the effective rate on that same $10,000 of cash collapses to roughly 3%.
That gap — 24% versus 3% — is the entire value of the deduction in a single year, and it compounds because the tax you did not pay stays invested. Remember the effective rate is measured against the cash you actually received, not the taxable figure, which is why depreciation is described as sheltering real cash flow with a paper deduction. Run your own property's numbers to see where on that spectrum it falls.
Improvements start their own depreciation clocks
The building's 27.5-year schedule is not the only shelter you can create. Every capital improvement you make — a new roof, an HVAC system, a kitchen remodel, a room addition — is a separate depreciable asset with its own placed-in-service date and its own recovery period, layered on top of the original building. A $20,000 roof placed in service this year begins its own 27.5-year clock, adding roughly $727 of annual deduction and extending the shelter into years when the original building's depreciation may be winding down.
Smaller expenditures may not need to be capitalized at all. The de minimis safe harbor under the tangible property regulations lets many landlords immediately expense items costing up to $2,500 per invoice or item, and the safe harbor for small taxpayers can allow current deduction of certain building repairs and improvements when total qualifying costs stay under specified limits. Distinguishing a deductible repair from a capitalized improvement is one of the highest-value judgment calls in rental taxation, because a current deduction shelters cash this year while a capitalized cost shelters it slowly over decades.
Frequently asked questions
How does depreciation lower my effective tax rate?
It is a non-cash deduction that reduces the taxable income from your rental without reducing your cash flow, so you pay tax on far less than you actually collect.
Can rental depreciation offset my W-2 income?
Usually only up to $25,000 if you actively participate and your modified AGI is under $150,000. Real estate professionals and qualifying short-term rental hosts who materially participate can offset ordinary income more broadly.
Do I pay the tax back later?
Partly. Depreciation lowers your basis, so more gain is taxed at sale — recaptured at up to 25%. You still benefit from the deferral and, often, from a lower recapture rate than the rate at which you deducted.
How is my annual depreciation amount calculated?
Split your cost basis between land (not depreciable) and the building, then divide the building basis by 27.5 years for residential rental property (39 for commercial). A $240,000 building basis produces about $8,727 per year, claimed straight-line and reported on Form 4562 and Schedule E.
Can cost segregation lower my effective rate even more?
Yes. A cost segregation study reclassifies parts of the building into 5-, 7-, and 15-year property eligible for bonus depreciation (100% for property placed in service after January 19, 2025 under the One Big Beautiful Bill Act), front-loading deductions that can push the effective rate on a year's income to zero — at the cost of larger recapture later.
What is phantom income and when does it hit?
Phantom income is taxable income that exceeds your cash flow. It tends to appear late in a hold, after the building is fully depreciated and the mortgage-interest deduction has shrunk, so the paper deductions that used to shelter the rent are gone. Many owners plan a 1031 exchange or sale before that point to reset a fresh depreciation schedule.
I forgot to claim depreciation for several years — what now?
You generally do not amend prior returns. File Form 3115 (Application for Change in Accounting Method) to claim a catch-up Section 481(a) adjustment that restores the missed depreciation in a single year, which itself can sharply cut that year's effective rate. Recapture still applies to depreciation 'allowed or allowable,' so claiming it is almost always better than skipping it.
Sources
Educational information and estimates only. Not tax advice. Tax rules change and vary by situation; consult a qualified tax professional before acting.