Big Mistake: A 70-Year-Old Landlord Never Claimed Depreciation on His Rental. The IRS Will Tax the Sale as if He Did

A 70-year-old landlord bought a small rental house decades ago, collected rent, and dutifully deducted repairs, mortgage interest, and property taxes on Schedule E every year. He never once claimed depreciation. His reasoning seemed sound: skip the deduction, keep things simple, and face a smaller tax bill when it came time to sell. He is about to discover why that logic is catastrophically wrong. The IRS taxes the sale as if he took every dollar of depreciation he was entitled to, whether he actually deducted it or not.

This scenario is more common than most people realize. Small landlords who self-prepare returns, inherit property, or rely on a bookkeeper unfamiliar with real estate frequently miss the depreciation deduction. Every spring, r/tax and r/realestateinvesting fill up with the same grim discovery: an owner is preparing to sell, the accountant asks for the depreciation schedule, and there is none.

Why This Mistake Is So Expensive

Residential rental property is depreciated over 27.5 years under the modified accelerated cost recovery system. On a house with a $200,000 depreciable basis, that works out to roughly $7,200 a year in deductions the landlord could have used to shelter rental income. Walk away from that deduction for 20 years and you have left behind approximately $140,000 in ordinary deductions.

The catch that turns this into a wealth-stage disaster rather than a mild oversight is found in Section 1250. The tax code requires the IRS to recapture depreciation that was allowed or allowable when you sell. “Allowable” means the depreciation you were entitled to take, whether or not you ever claimed it. The taxable gain calculation reduces your basis by all of that phantom depreciation, and the recaptured portion is taxed at rates up to 25% as unrecaptured Section 1250 gain. You receive the tax bill without ever having received the tax benefit.

Rising property values only sharpen the pain. The S&P Cotality Case-Shiller National Home Price Index reached 337.31 in July 2026, its highest reading on record. A property purchased in the 1990s or early 2000s almost certainly carries enormous appreciation, which means a large capital gain stacked directly on top of a large recapture figure.

Core Tension: Fix the Past or Live With It

The single most consequential decision at this point is whether to file Form 3115 (Application for Change in Accounting Method) before the sale closes. This is the only clean path to recovering missed depreciation without amending years of prior returns.

Form 3115 allows a taxpayer to take a Section 481(a) adjustment, a single catch-up deduction in the current year equal to all the depreciation that should have been claimed in prior years. For a landlord facing six figures of missed deductions, that adjustment can shelter a substantial chunk of ordinary income in the year it is filed. It does not eliminate the recapture on sale, but it finally delivers the deduction the IRS is going to tax him on regardless.

Two Realistic Paths

1. File Form 3115, then sell. Claim the catch-up deduction in 2026, use it to offset rental income, pension distributions, IRA withdrawals, or other ordinary income, then close the sale in 2027. The recapture bill still arrives, but it is offset by a real deduction with real cash value. For most landlords in this position, this is the clearly superior path.
2. 1031 exchange into another rental. A like-kind exchange defers both the capital gain and the depreciation recapture. At age 70, this only makes sense if the plan is to hold the replacement property until death, at which point heirs receive a stepped-up basis and the recapture liability effectively disappears. Trading into more landlord headaches at 70 to chase a tax deferral is a poor tradeoff unless estate planning is the primary goal.

Selling without acting first is the inferior choice in either case. The recapture happens regardless. Skipping Form 3115 simply means paying tax on depreciation that was never deducted.

What to Do This Week

Pull every Schedule E filed on the property, confirm depreciation was never claimed, and get a cost segregation-aware CPA on the phone before signing a listing agreement. Form 3115 must be filed with a timely return, and sequencing matters: the catch-up deduction is most valuable in a year with substantial ordinary income to absorb it, which may argue for pulling forward an IRA withdrawal into the same tax year.

With the 10-year Treasury yielding around 5.2%, after-tax sale proceeds have a genuine home in short-duration Treasuries or a laddered bond portfolio, making the tax cleanup worth doing properly the first time. The depreciation recapture rule is one of nine IRS traps that quietly drain retirement accounts, and we mapped all of them in a free guide here. The mistake to avoid is closing the sale first and asking the accountant about depreciation afterward. By then, Form 3115 is off the table.

Editor’s note: This update refreshes the Case-Shiller National Home Price Index figure to the July 2026 reading of 337.31, its all-time high on record, and updates the 10-year Treasury yield to approximately 5.2%, reflecting current market levels as of October 2026.

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