Can you take bonus depreciation on a used rental property? Usually yes, and here's why.

There’s a belief that floats around real estate investing circles: bonus depreciation is a new-construction perk, and if you bought a used house — which is to say, almost every rental anyone actually owns — you don’t get it. It’s a reasonable thing to assume, and for about a decade it was even true. It has not been true since 2017. A used residential rental you bought from an unrelated seller qualifies for bonus depreciation on its short-life components in exactly the same way a brand-new build does. The “used” part costs you nothing.

Does bonus depreciation only apply to new property?

No — not since the Tax Cuts and Jobs Act. This is the crux of the whole misunderstanding, and it’s a genuinely old rule that stuck in people’s memory after the law moved on.

Before 2017, bonus depreciation carried an “original use” requirement: the property had to be placed in service new, used for the first time by you. A house someone else had already lived in or rented failed that test, so the shorter-life components a cost segregation study identified were not bonus-eligible. If you bought a used rental, you still got to depreciate those components over their 5-, 7-, and 15-year lives, but you couldn’t front-load them.

The 2017 law removed the original-use requirement and replaced it with an acquisition requirement that most ordinary purchases clear without trying. Used property has been eligible for bonus depreciation ever since. The reclassified components inside a used house get the same treatment as those in a new one.

What OBBBA changed, and the acquisition date that matters

The 2025 One Big Beautiful Bill restored bonus depreciation to 100% for property acquired after January 19, 2025. “Acquired” follows the binding-contract rule — the date you signed the purchase contract, not the date you closed and not the date the property was placed in service. If you signed on or before January 19, 2025, the older phase-down rates attach to that property even if you closed afterward, which is why we capture the contract date at intake.

Notice what is not in that rule: anything about whether the house is new or used. A used single-family rental acquired after that date gets the same 100% bonus depreciation as a new one. New versus used simply is not one of the levers.

The two things that actually disqualify a purchase

If “used” isn’t the problem, what is? Two acquisition rules, and both are narrower than the fear around them.

First, you can’t buy from a related party. A purchase from close family or from an entity you control doesn’t meet the acquisition requirement — the code doesn’t want you “selling” a property to yourself to reset the depreciation clock. An arm’s-length purchase from an unrelated seller is fine, and that describes a normal MLS or off-market deal.

Second, the property can’t reach you with a carryover or stepped-up basis. That’s the actual mechanism behind the exceptions people run into. Inherited property takes a stepped-up basis at death and generally isn’t bonus-eligible — we walked through that in cost segregation on inherited property. Property received as a gift carries the giver’s basis. And your own former residence converted to a rental doesn’t get bonus on the existing structure, because you already used it. In each of those cases the disqualifier is how you got the basis — not that the building is old.

Line those up and the ordinary case is obvious: you bought a used rental house from a stranger for cash or a mortgage, at a price you negotiated. That clears both rules, and the study’s reclassified components are fully bonus-eligible.

A worked example: a $480K used single-family rental

Numbers make this concrete. Say you buy a used single-family rental for $480,000 from an unrelated seller, sign the contract in spring 2026, and place it in service the same year.

Strip out land first — call it 20% of the price, so $96,000 — and you’re left with $384,000 of depreciable building basis. Left alone, all of it would depreciate straight-line over 27.5 years.

A cost segregation study on a typical single-family rental reclassifies roughly 22% of that basis into 5-, 7-, and 15-year property: flooring and cabinetry, appliances, the specialty electrical and plumbing tied to them, and the land improvements outside. That’s about $84,500 moving out of the 27.5-year bucket.

With 100% bonus depreciation in effect, that entire $84,500 is deductible in year one rather than dribbling out over decades. At a 32% marginal federal rate, that’s roughly $27,000 of first-year federal tax savings — on a used house, bought the ordinary way. Depending on whether your state conforms to federal bonus depreciation, the total can be larger still. You can put your own property’s numbers into the savings estimate to see a ballpark.

Not one dollar of that deduction depended on the house being new. The same study on a new build of the same basis would land in the same place.

What to do if you already own a used rental

If you bought a used rental after January 19, 2025 and haven’t run a study, the acceleration is still on the table — a study is cleanest in the property’s first depreciable year, so sooner beats later. If you’ve already filed a return or two on the property, that’s a conversation to have with your CPA about how the deduction lands on your next return before you order; we build the study so they can implement it without translating anything.

Either way, “it’s a used house” is not a reason to skip it. For the overwhelming majority of residential investors, used is simply what a rental is — and the deduction is there for the claiming, on a defensible, audit-ready basis.