Capital Gains vs. Installment Sale — a Side-by-Side for a 2-4 Unit
When an owner tells me they're thinking about selling a rental, the first question is almost always about price. That makes sense. But there's a second question that often matters just as much to what they actually keep, and it rarely gets asked until it's too late to change: how do you want to receive the money?
There are two basic answers. You can take the full price at closing and recognize the whole gain in one tax year. Or you can take part of it up front and the rest over time on a note, which generally spreads the gain across the years you're paid. Same building, same sale price, two very different tax pictures.
The easiest way to see the difference is to put them side by side on one property.
The standing caveat: I'm a buyer, not a CPA or tax advisor. The numbers below are a made-up example to show the shape of each structure, not a calculation of anyone's actual tax. What either option does on your return is a question for your accountant.
The example duplex
Picture a long-held duplex somewhere in York County. To keep the arithmetic simple, use round, hypothetical numbers:
Sale price: $300,000
Adjusted basis: $120,000 (what the owner paid, plus improvements, minus the depreciation taken over the years)
Gain: $180,000
That $180,000 is the number both structures have to deal with. Neither one makes it smaller. The only question is when it gets recognized, and what else comes along with it.
Option A: take it all at closing
This is the standard sale. The buyer brings their financing, the deal closes, and the full $300,000 (less any payoff and closing costs) arrives at once.
On the tax side: the entire $180,000 gain generally lands in the year of sale. It stacks on top of whatever else the owner earned that year: wages, Social Security, other rental income, retirement distributions. A big one-year spike like that can push income into higher brackets and can affect other things that key off income, depending on the owner's situation.
What it does well:
A clean break. The building is gone, the tenants are someone else's, and there's no ongoing relationship with the buyer.
The money is fully yours to use. Pay off other debt, help family, reinvest, or simply hold it. Nothing is tied up.
No credit risk. Whether the buyer can keep paying is their lender's concern, not yours.
What it costs: the full gain is concentrated in one year, and the tax is due on that year's return. For an owner with a large gain and otherwise modest income, the concentration itself is the cost.
Option B: an installment sale
Now run the same duplex as an installment sale. Say the buyer puts $60,000 down at closing and the owner carries a $240,000 note, paid monthly with interest over ten years.
On the tax side: instead of recognizing the whole $180,000 at once, the owner generally recognizes gain as principal comes in. In this example the gain is 60% of the sale price ($180,000 of $300,000), so roughly 60 cents of each principal dollar received is gain and the rest is a return of basis.
That means:
In the year of sale, the $60,000 down payment carries roughly $36,000 of gain, plus the gain on whatever principal is paid that first year.
The remaining gain, roughly $144,000, is recognized gradually over the life of the note as the principal is paid down.
The interest is separate. It's income on top of the sale price, and it's generally taxed as ordinary income in each year it's received.
Same $180,000 of gain. Instead of one spike, it becomes a series of smaller, more predictable amounts spread across a decade.
What it does well:
Smooths the tax. Spreading the gain can mean a meaningfully different total bill, even though the price never changed.
Monthly income. For an owner near retirement, a note payment can look a lot like the rent check, without the building attached.
Interest earned. Over a ten-year note, the interest is a real number in its own right.
What it costs:
You're the bank. If the buyer stops paying, the note is secured by the building, but enforcing it takes time and money, and you may end up owning the property again.
Less money now. You get $60,000 at closing, not $300,000. If you need the full amount soon, this doesn't fit.
A fixed payment doesn't adjust. Inflation erodes the real value of a fixed payment over ten years.
Not everything spreads. Depreciation recapture in particular may not follow the same schedule as the rest of the gain, and some of it can be pulled into the year of sale. On a property held a long time, this can be a big piece of the picture.
Side by side
| | Option A: All at closing | Option B: Installment sale |
|---|---|---|
| Paid at closing | Full price | Down payment only |
| When the gain is recognized | Generally all in the year of sale | Generally as principal is received |
| Interest income | None | Yes, taxed as ordinary income |
| Ongoing relationship with the buyer | None | Yes, for the life of the note |
| Default risk | None | Yours |
| Depreciation recapture | Year of sale | May still land largely in the year of sale |
| Tends to fit | Needs the money now, wants a clean break | Large gain, wants income over time, comfortable vetting a buyer |
The questions that decide it
Neither structure is better in general. The right one depends on a few honest answers:
1. Do you need the full proceeds soon? If yes, the installment sale is probably out, whatever it does for the tax.
2. How big is the gain compared to your normal income? The bigger the gap, the more spreading tends to matter.
3. How much of the gain is depreciation recapture? Have your CPA break this out first. It can change the math more than anything else on this list.
4. Are you comfortable being a lender? Not in theory. In practice, to a specific buyer you've actually looked at.
5. What's your timeline? A ten-year note is a ten-year relationship. A shorter term with a balloon is one common middle ground, with its own tradeoffs.
There's also a middle path: a larger down payment and a shorter note. You get more up front, carry less exposure, and still get some spreading. The terms are flexible; that's the point.
Do this before you sign anything
The structure has to be chosen before closing. Once the agreement is signed, the tax treatment follows whatever it says. So the order is: figure out your basis and your gain, sit down with your CPA, compare both structures using your real numbers, and then negotiate the sale.
If you're not sure what your accountant will need, what your CPA needs from you before you sell a rental walks through the list. And if your property has been depreciated for many years, read depreciation recapture — the tax surprise that catches sellers before you run either option.
Whichever way you go, any note should be drafted by an attorney. This is not the place for a template off the internet.
How I fit into this
I'm a local buyer here in York County. I buy 2-4 unit rentals directly from owners and hold them, and I own and operate one myself. Because I'm buying directly, the structure is something we can actually talk about: a standard sale at closing, an installment sale where you carry part of the price, or something in between.
I'm not going to tell you which one is right for your return; your CPA will. What I can do is give you a real number on both, so the conversation with your accountant is about your actual options instead of hypotheticals.
The free York County Landlord's Guide covers the questions worth asking first. Or call or text me at 717-347-6770 — no pressure, no obligation.
---
Related reading: how an installment sale spreads your tax over years, seller financing as a retirement-income substitute — the real math, and what your CPA needs from you before you sell a rental.
Want to talk about your specific situation?
I'm Ed Lane at Yellow House Buyers, LLC. I'm actively looking to buy 2-4 unit rental properties in York County directly from owners. I buy to hold long-term — not to flip, not to wholesale. If you want a no-pressure conversation about your property, here's how to reach me.
Or download the free 2026 York County Landlord's Strategy Guide — it walks all six selling scenarios with the actual math.
Comments