How Does Depreciation Work on a Rental Property?

Depreciation is a tax deduction that lets landlords write off a portion of the building's cost every year, because structures wear out over time even when land does not, and the IRS accounts for land separately from buildings. For residential rentals, the building is typically depreciated over 27.5 years, with the land value excluded from the deduction.

It is a paper expense: no cash leaves your pocket, but the deduction reduces your taxable rental income, which is why landlords say depreciation is the real estate investor's best friend.

The deduction works because tax law assumes the building loses value over its useful life, even if the property actually appreciates in the market. That mismatch is intentional and it is why rentals can show a tax loss while producing real cash flow.

To calculate depreciation, take the building's value, which is the purchase price minus the land value, divide it by 27.5 years for residential rentals, and deduct that amount each year until it is fully depreciated. A $275,000 building value produces a $10,000 annual deduction, sheltering $10,000 of rental income from federal tax.

Example: the property's tax basis, its cost for tax purposes, must be allocated between land and building based on their values. That split, often taken from the appraisal, decides the size of your annual deduction.

Once the 27.5-year schedule ends, the deduction stops, though improvements made later get their own depreciation schedules, so active landlords keep adding to their deductions as they renovate.

The trade-off comes at sale: the depreciation you claimed is recaptured and taxed, so the IRS collects the benefit back with interest, unless you defer it with a 1031 exchange. When you sell, the accumulated depreciation reduces your tax basis, which raises your taxable gain, and the recaptured portion is taxed at a different rate than ordinary gain.

This is why experienced investors think about their exit before they claim: the depreciation saved taxes for years, but the sale triggers the accounting.

A 1031 exchange defers the whole gain, including the recapture, by rolling the sale into a replacement property, one of the strongest reasons the exchange strategy exists in the first place.

Pennsylvania does not fully mirror federal depreciation: the state allows depreciation on rental properties for income tax purposes, but with its own rules, and Pennsylvania's flat-rate income tax treats the resulting gain differently from federal capital gains. Verify the exact state treatment with a Pennsylvania tax professional.

The practical effect for many landlords is that the federal deduction is generous, while the state side deserves its own calculation, especially at sale when federal recapture and state treatment both apply.

Keep clean records of every improvement, because bonus depreciation and cost segregation decisions made today shape both the deductions now and the taxes at sale, and a good accountant turns that paperwork into real savings.

Two tools can accelerate depreciation and move deductions forward: bonus depreciation, which lets you claim a larger share of qualifying improvements in the first year, and cost segregation, a study that separates building components like fixtures, appliances, and finishes so they can be depreciated on faster schedules. Used together, they can turn a renovated property into a strong tax deduction in the early years of ownership.

Cost segregation is most valuable on properties with significant improvements or new construction, because the study, paid to a specialist, identifies components eligible for five, seven, or fifteen year schedules instead of the building's twenty-seven and a half.

Bonus depreciation applies to many categories of improvement and can be claimed in the year the property is placed in service, making the first year of ownership the tax-friendliest one.

These tools add complexity and cost, so they make sense when the deduction is large enough to matter. A small rental barely benefits; a newly renovated multi-unit can benefit substantially. Your accountant runs the comparison before you spend on the study.