A rental property that puts $3,807 into your bank account can, entirely legitimately, report a $1,679.73 loss on your tax return. Both numbers describe the same property in the same year. Neither is a trick, an aggressive position, or something your accountant invented. The gap between them is depreciation — a deduction for which you never write a cheque — and the fact that most landlords do not understand it is why they fall into one of two expensive camps: the ones who overpay tax every year because they left the deduction on the table, and the ones who see a loss on their return and assume something has gone wrong.
This guide is about the second set of books your rental keeps. The first set is the one the rental deal analyzer works with — rent, expenses, cash flow, whether the deal makes money. That set answers whether you should own the property. The second set decides what you keep, and it runs on completely different rules: money you spent that you cannot deduct this year, money you did not spend that you can, losses that are real but that you may not be permitted to use, and a bill at the end that has been quietly accruing since the day you bought.
By the end of this you will be able to do six specific things. Set your depreciable basis correctly on day one, which is the single decision that determines every deduction for the next 27.5 years and which almost nobody revisits. Decide whether a given expenditure is a repair you deduct now or an improvement you capitalise, using the actual regulatory tests rather than a rule of thumb. Fill in Schedule E line by line without making the mistake that appears on a large share of self-prepared returns. Work out whether you can actually use a loss this year or whether it suspends. Know what section 199A does for you now that it has been made permanent, and what the 250-hour safe harbor requires. And price the exit — recapture, capital gains, and the two escape routes — before you list, rather than after.
A note before you start. This is general tax education, not personalised tax advice, and it is written about federal law only. Every state that taxes income taxes rental income too, on its own rules, and none of that is covered here. Every statutory citation below links to the actual text so you can check it, and every dollar figure is either arithmetic shown on the page or a figure from the statute. Where the law recently changed — and one major provision changed in July 2025 — the guide says so and cites the change, because a great deal of material still in circulation is now wrong. Take this to a CPA rather than instead of one: what it is designed to do is make that conversation short and specific, and to stop you from being one of the people who arrives having quietly lost money for six years.
The two sets of books, and why they disagree
Here is the worked property this guide uses throughout. A single-family rental bought for $265,000, with $3,400 of closing costs that get added to basis rather than deducted, financed with $198,750 at 7.125% over 30 years. It collects $2,800 a month in rent, and it has been owned for several years so the loan is past its first year.
Set one — the cash books:
| Amount | |
|---|---|
| Rent collected | $33,600 |
| Other income (laundry, late fees) | $640 |
| Total collected | $34,240 |
| Operating expenses (excluding interest) | −$14,363 |
| Mortgage interest | −$13,940 |
| Mortgage principal | −$2,130 |
| Cash in your pocket | $3,807 |
Set two — the tax books, same year, same property:
| Amount | |
|---|---|
| Total income | $34,240 |
| Operating expenses (excluding interest) | −$14,363 |
| Mortgage interest | −$13,940 |
| Depreciation | −$7,616.73 |
| Schedule E line 21 | −$1,679.73 |
Two differences produce the entire gap, and they run in opposite directions.
Principal is not an expense. The $2,130 of principal left your account but bought you equity — it converted cash into ownership. It is not deductible, and the single most common error on a self-prepared Schedule E is entering the whole mortgage payment on the interest line. Your lender's Form 1098 gives you the interest figure; that is the only part that is deductible.
Depreciation is an expense you did not pay. The $7,616.73 never left your account. It is the tax code's recognition that the building is wearing out, spread across 27.5 years, and it is deductible whether or not the property actually declined in value — which, in most years, it did not.
Net those two and a property that made $5,937 before depreciation, and put $3,807 in your pocket after the principal payment, reports a loss. This is the intended operation of the rules, not a loophole. It is also why a landlord who does not understand depreciation will look at a loss on their return and conclude their accountant made an error, or worse, that the property is failing.
The third thing to understand about that $7,616.73 is that it is not free. It reduces your basis in the property, and the reduction comes back as tax when you sell — at a rate of up to 25%, under a provision called unrecaptured section 1250 gain. Depreciation is not a gift; it is a deferral. But as the next section explains, it is a deferral you take whether you want it or not, which is why the only sensible response is to claim every dollar of it.
The single most expensive misunderstanding in rental tax
There is one sentence in the depreciation rules that costs landlords more money than everything else in this guide combined, and it is this: your basis is reduced by depreciation allowed or allowable.
Read that again. Not "allowed." Not "claimed." Allowed or allowable. The amount you were entitled to deduct, whether or not you actually deducted it.
The consequence is stark. Suppose you own the worked property for ten years and never claim depreciation — perhaps you prepared your own returns and did not know about it, perhaps you deliberately skipped it because you did not want the recapture later. At sale, the IRS calculates your gain using an adjusted basis reduced by the $76,167 of depreciation you were allowed to take over those ten years. You pay tax on that gain at up to 25%, exactly as if you had claimed it. But you never got the deductions. You paid the price and received nothing.
There is no version of this where not claiming wins. Claiming depreciation is not an aggressive position or a matter of taste; it is the only rational choice available, and the only question is whether you get the deductions on the way through or simply eat the recapture at the end for nothing.
If you have already missed years of it, that is a fixable problem and a well-trodden one — the mechanism is a change in accounting method rather than amending old returns, and it is precisely the kind of thing a CPA handles routinely. What you should not do is keep not claiming because you have not claimed before.