Who claims the house on taxes if the owners are not married?

Each unmarried co-owner claims their own share of the interest and property taxes they actually paid, if they itemize. Both claiming 100% of the same interest is the mistake to avoid — it flags both returns.

United States · 5 min read · Josh Barton · 2 Jul 2026 · Updated 23 Aug 2026

Can Two People Claim a House on Their Taxes? Yes — Here's How to Split It

Q: Can two people claim the same house on their taxes?

Yes. Co-owners can each deduct the share of mortgage interest and property taxes they actually paid, as long as each is liable for the loan, each itemizes, and the combined claims don't exceed what was actually paid on the house.

Q: Can you split the 1098 between two people?

The form is issued to one borrower, but the deduction splits. The named borrower deducts their share normally; the other co-owner reports their share on the Schedule A line for interest not reported on a Form 1098, with a statement naming who received the form.

Q: If married filing separately, who claims the mortgage interest?

The spouse who actually paid it from their own funds and is liable on the loan — and if one spouse itemizes, both must itemize. In community property states, payments from community funds are generally split 50/50 between the returns.

Yes — co-owners can each deduct the mortgage interest and property taxes they actually paid. How to split one Form 1098 between two people, the filing-separately rules, and the per-owner capital gains exclusion.

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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.

Two owners, one form

Every January, the lender sends out Form 1098 showing the year's mortgage interest — addressed to one borrower. If you co-own the place, that's the moment the questions start: does the person named on the form claim all of it? Do you split it 50/50? By ownership percentage? By who actually paid?

The IRS's answer is the last one, and it's worth getting right, because it decides real dollars every single year you own together.

Can two people claim the same house on their taxes?

Yes — and no one gets to double-dip. Two (or more) co-owners can each claim a deduction for the same property in the same year, as long as each person claims only the share of the interest and taxes they actually paid, and the combined claims don't exceed what was actually paid on the house. The house doesn't belong to one return. What matters is who is liable on the loan, who made the payments, and whether each person itemizes.

The rule: you deduct what you actually paid

For unmarried co-owners filing separate returns, each person can deduct only the mortgage interest they actually paid out of their own funds. Not their ownership percentage, not an even split — what they paid. If you covered 60% of the payments this year, 60% of the interest is yours to deduct, provided you're liable on the loan and you itemize rather than take the standard deduction.

Two wrinkles worth knowing:

Payments from a joint account are presumed equal. If the mortgage autopays from a joint checking account, the IRS assumes you each paid half unless you can show otherwise. If your deal is 70/30, either fund the account 70/30 with records to match, or pay separately.
You can't deduct generosity. If your co-owner covered your months during a rough patch, they don't get your deduction for it — interest paid on someone else's behalf is generally nobody's deduction. Another reason to structure help as a documented loan between owners rather than quiet cover.

Can you split the 1098 between two people?

The form itself doesn't split — the lender issues it to one primary borrower, under one Social Security number. But the deduction splits fine, and the mechanics are routine:

The person named on the 1098 deducts their share of the interest on Schedule A in the normal way.
The co-owner who isn't named reports their share on the Schedule A line for mortgage interest *not* reported to you on a Form 1098, and attaches a statement naming who received the form and how the interest was divided.

That's it. No amended 1098, no letter to the lender required. What the IRS cares about is that the two shares reflect who actually paid and don't add up to more than the interest charged. (Our free mortgage interest split calculator does the division — enter the 1098 amount and each owner's payment share, and it returns each person's number to the cent.)

Married filing separately: who claims the mortgage interest?

Married couples filing separately follow the same actual-payment principle, with two extra rules that catch people:

If one spouse itemizes, both must itemize. One of you can't take the mortgage interest while the other takes the standard deduction — the second spouse's standard deduction becomes zero. Run the numbers both ways before choosing separate returns.
Community property states are different. In a community property state, mortgage payments made from community funds are generally treated as paid half by each spouse, so the deduction typically splits 50/50 regardless of whose paycheck covered it.

Outside community property, the spouse who actually paid the interest from separate funds — and is liable on the loan — takes the deduction. After a divorce, the decree and who actually makes the payments determine who claims it going forward.

Who claims the house if you're not married?

There's no "head of household owns the deduction" rule and no requirement that one person claims everything. Each unmarried co-owner claims their own share of what they paid — interest and property taxes — if they itemize. If one of you pays the entire mortgage and the other covers utilities and groceries, the one paying the mortgage claims all the interest. If you split payments 50/50, you each claim half. The worst answer is the common one: both claiming 100% of the same interest, which is an audit flag for both of you.

Property taxes follow the same logic

Same principle: each co-owner deducts the property taxes they actually paid, subject to the usual federal limits on state and local tax deductions. If one of you fronts the whole tax bill for convenience, square up in the ledger and keep the reimbursement visible, or the deduction and the reality stop matching.

The good news at sale: exclusions multiply

Here's the part co-owners rarely hear: the home-sale capital gains exclusion applies per owner, not per house. Each co-owner who has owned the home and used it as their main residence for at least two of the five years before the sale can exclude up to $250,000 of *their own share* of the gain. Two qualifying co-owners can shelter up to $500,000 of combined gain; three can shelter up to $750,000. Each person's eligibility is tested separately — if one of you moved out three years ago, that person may fail the use test while the other still qualifies.

If the property is a rental rather than a residence, different rules apply across the board — income and expenses get allocated by ownership interest, and there's no residence exclusion. (Our guide to co-owned rentals covers that side.)

The whole system runs on records

Notice the pattern: every one of these rules turns on being able to show who actually paid what. The interest deduction, the joint-account presumption, the property tax split, your share of the gain at sale — all of it is decided by the payment history. The co-owners who have a bad April are the ones reconstructing three years of "I think I paid the March one" from bank exports.

This is a large part of why Laddered keeps one shared ledger for the life of the property: every payment logged, split by the rules you agreed, visible to every owner — so at tax time the answer to "who paid what" is a report, not an archaeology project. Your co-ownership agreement sets the shares; the ledger proves them.

Thresholds shift, states differ, and your situation has details an article can't see. A one-hour session with a CPA in your first year of co-owning typically pays for itself. Bring the ledger and it'll be a short hour.