United States · 7 min read · Laddered Editorial · 7 Jul 2026
How to Buy Someone Out of a House: Divorce, Inheritance & Co-Owners
Divorce, an inherited home, or a co-owner cashing out — buying someone's share follows the same path: an appraisal, a cash-out refinance, and a tax bill that depends entirely on who you're buying out.
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This article is general information only and is not legal, financial, tax, or property advice. Consider advice from a qualified professional for your circumstances.
What you're actually paying for
Buying someone out of a house means buying their share of the equity — the home's value minus what's still owed on it. A house worth $500,000 with a $300,000 mortgage has $200,000 in equity, so a half-owner's share is $100,000. That figure, before costs and tax, is where every buyout starts. You can run yours in the buyout calculator.
Arriving at that number is the straightforward bit. Whether the buyout is fair — and whether it can even happen — comes down to the appraisal, the refinance, and the tax treatment. And the tax treatment swings entirely on who you're buying out.
Nail down the value first
The most common fight in a buyout isn't the math, it's the number you put into it: the person leaving wants a high value, the person staying wants a low one. Settle it with an appraisal, not an argument. A licensed appraiser gives you a defensible figure; a realtor's comparative market analysis is cheaper but softer. If there's tension, split the cost of one independent appraisal and agree up front to be bound by it. It's the smallest check you'll write to avoid the biggest fight.
The cash-out refinance is the mechanism
In the US, a buyout almost always runs through a cash-out refinance. You take out a new loan in your name alone, large enough to do two jobs at once: pay off the existing mortgage, and hand the departing owner their share of the equity in cash. The moment it closes, the other person is off the loan — no longer liable — and they've been paid.
There's a ceiling, though, and it catches people. Lenders typically cap a cash-out refinance at 80% of the appraised value. On that $500,000 home, 80% is $400,000 — just enough to clear the $300,000 mortgage and fund a $100,000 buyout. Nudge the numbers (a bigger existing mortgage, a larger equity share) and you run out of room, and the shortfall has to come from your own cash.
Two things people don't expect. First, you have to qualify for that new loan on your income alone — two people who comfortably carried the mortgage together often can't, individually, pass for the whole balance, and that's where buyouts most often stall. Second, the 80% rule isn't the only door: a home equity loan, a HELOC, or plain cash savings can fund the payout too, and a buyout done under a divorce or separation agreement is often handled as a rate-and-term refinance rather than a cash-out, which can allow a higher loan-to-value than 80%.
One more step, easy to forget: coming off the loan and coming off the title are separate acts. The refinance handles the loan; a deed handles the title — usually a quitclaim, though some states and situations use a different instrument (California divorces, for instance, use an interspousal transfer deed), signed once the refinance closes. Do only one and someone ends up either liable for a house they no longer own, or owning a slice of one they're not liable for.
The tax bill depends on who you're buying out
Here's where a divorcing couple and a pair of siblings part ways entirely.
In a divorce, a transfer of the home between spouses — or ex-spouses, under a divorce or separation instrument — is generally not a taxable event. No capital gains at the transfer; the spouse keeping the house simply takes over the other's cost basis and deals with any gain only if they sell down the road.
Buying out a co-buyer or an inherited-property sibling is different: it's treated as a sale of that person's interest, so they may owe capital gains tax on their gain. Two things usually soften it. If the home was their main residence, the Section 121 exclusion can shelter up to $250,000 of their share of the gain (if they pass the ownership and use tests). And with inherited property, the cost basis is *stepped up* to the home's value on the date of death — so a sibling bought out soon after inheriting often has little or no gain to tax at all. A real bill tends to appear only where the home has appreciated meaningfully since the death, or since a co-buyer originally bought in.
So "how much tax?" has no single answer; it turns on the relationship and the paperwork. Get a CPA's read before you close — especially where there's an inheritance or a real capital gain in play. (Our co-owner tax guide goes deeper on the Section 121 exclusion.)
When you can't agree
Not every co-owner wants to sell, and not every buyout gets agreed. When co-owners hit a wall, any one of them can generally file a partition action and ask a court to force the sale of the whole property, with the proceeds divided by ownership share. It works — but it's slow, public and expensive, and the timeline belongs to the court, not to you. It's the costliest way to end a co-ownership, and the one where a judge, rather than the owners, sets the terms.
For co-owners: write the method down first
You can't plan a divorce or an inheritance. But co-buyers can plan everything. If you're buying with a friend, a partner or a sibling, put the buyout into your co-ownership agreement at the start: how a share gets valued, who has first right to buy it, and the timeline. Unmarried couples especially have no divorce court to fall back on — the agreement is the whole safety net.
Common questions
How do you calculate a house buyout? Take the appraised value, subtract the mortgage balance to get the equity, then multiply by the departing owner's ownership share. On a $500,000 home with a $300,000 loan, a 50% owner's share is $100,000.
How do you buy someone out without selling the house? Usually a cash-out refinance: a new loan in your name pays off the old mortgage and funds the payout, and the other owner signs a quitclaim deed to come off the title. Lenders generally cap the new loan at 80% of the home's value.
Do you pay taxes when you buy someone out? A transfer between spouses in a divorce is generally not taxable. Buying out a co-owner or an inherited sibling is treated as a sale of their share, so they may owe capital gains tax — but inherited property gets a stepped-up basis (its value on the date of death), so a buyout soon after often has little gain, and Section 121 can exclude up to $250,000 if it was their main home.
Can you force a co-owner to sell? Broadly, yes. A co-owner can file a partition action and have a court order the sale, unless a prior agreement sets out a different path.
Keep the numbers ready
A fair buyout runs on records — what the place is worth, what's owed, and what each owner actually put in over the years. Laddered keeps that history in one place: each owner's contributions and the shares you agreed, so when someone wants out you're negotiating from numbers everyone already trusts rather than reconstructing them from bank statements under pressure.
This is general information, not legal or tax advice, and buyout taxes turn on your state and your situation. Before you close, get an appraiser, a loan officer and — if there's any capital gain or an inheritance in play — a CPA across the details.