Buying a House as an Unmarried Couple: Protect Both

The mortgage process treats two unmarried buyers almost exactly like two married ones. The lender wants income, credit and reserves. Nobody at the closing table asks about your relationship status, and that is precisely the problem: the paperwork that protects a married couple by default gets created automatically, and the paperwork that protects you has to be written on purpose.

So buying a house as an unmarried couple is not harder to finance. It is harder to unwind, and the cost of that shows up years after anyone is thinking about it.

The video below walks through the legal exposure an attorney sees when unmarried partners buy together. After that, the numbers.

1. What Actually Changes When You Are Not Married

Quick Answer: Nothing changes in the loan. Everything changes in the law around it. Buying a house as an unmarried couple gives you no default claim on each other’s share, no automatic inheritance and no court process for dividing the home. Your monthly PITI payment is identical; your legal position is not.

Underwriting is blind to marital status, and federal fair lending rules keep it that way. So the gap is never visible at the closing table. It appears later, and only in four specific moments.

• The relationship ends. Divorce courts split marital property. There is no equivalent court here — you are two co-owners of an asset, and the only rules are the ones on the deed.
• One partner dies. A surviving spouse inherits by default in every state. A surviving partner inherits nothing unless the deed or a will says so.
• One partner stops paying. Both names on the note means both owe the whole payment, not half of it. One missed payment lands on both credit files.
• One partner wants out. Removing a name from the mortgage almost always means refinancing, and the remaining partner has to qualify alone.

None of these are exotic. They are the ordinary endings of ordinary relationships, and the paperwork that handles them costs a few hundred dollars before closing.

2. How Many People Buy a Home This Way?

Quick Answer: Unmarried couples were 6% of all US home buyers and 11% of first-time buyers in the National Association of Realtors’ 2025 survey. Among first-timers, buying a house as an unmarried couple is now more common than buying alone as a single man.

The 2025 Profile of Home Buyers and Sellers surveyed buyers who closed between July 2024 and June 2025, when mortgage rates averaged 6.69%. Married couples still dominate, but the first-time column tells a different story.

The 6% figure hides the real shift. Unmarried couples are nearly twice as large a share of first-time buyers, so this is a pattern that starts at the entry point of homeownership and thins out further up the ladder.

3. How You Hold Title Decides Almost Everything

Quick Answer: The deed, not the mortgage, decides who owns what. Unmarried couples choose between joint tenancy, which passes the whole home to the survivor automatically, and tenants in common, which lets you own unequal shares and leave yours to anyone. The escrow officer will ask once, at signing, and title insurance will not fix a bad answer.

This is the single decision most couples make in thirty seconds and regret for years. When buying a house as an unmarried couple, it is also the only decision that carries legal weight on its own. Here is what each form does when something goes wrong.

One warning that catches people out: the deed and the loan are separate documents. Being on one does not put you on the other, and either can be lopsided without anyone noticing.

4. Does Your State Treat You as Married Anyway?

Quick Answer: In nine states and the District of Columbia, living together and presenting yourselves as married can create a legally valid marriage with no ceremony. Everywhere else it creates nothing at all, however long you stay. For most people buying a house as an unmarried couple, that means the home loan paperwork is the only relationship record that exists.

The Social Security Administration maintains the working list, because it has to decide who counts as a spouse for benefits. Its digest of state laws on common-law marriage is the clearest public reference there is.

Both outcomes are a problem for anyone buying a house as an unmarried couple who has not thought them through. In the top row, you can acquire marital obligations you never signed up for. In the bottom row, twenty years together buys you no claim on a home that is not in your name.

In 41 states, the length of your relationship has no legal weight at all. Only the deed does.

5. Whose Credit Score Does the Lender Actually Use?

Quick Answer: The lower one. Fannie Mae takes each borrower’s middle score, then uses the lowest of those as the representative score for the loan. Applying together with a partner whose credit is weaker prices the whole mortgage off their file, which is the main argument for leaving one partner off the loan.

The rule is written into the Fannie Mae Selling Guide: middle of three scores per borrower, then the lowest of those across all borrowers. Here is what that costs on a $400,000 loan.

This is the one place where buying a house as an unmarried couple has an advantage: nobody expects both names, so dropping one is uncontroversial. The trade-off is that you lose that partner’s income, which shrinks what you can borrow. A partner left off the note can still go on the deed, keeping their ownership intact and their credit file out of the pricing.

6. When One of You Pays More of the Down Payment

Quick Answer: Unequal cash and an equal deed is the most expensive combination in this whole article. If one partner brings $70,000 and the other brings $10,000, a 50/50 deed moves about $47,600 of value from the first to the second within five years, against owning in proportion to the cash. Money from a parent carries its own gift letter rules on top.

Take a $400,000 purchase with $80,000 down, sold after five years at 3% annual appreciation, with 8% selling costs. Net proceeds come to about $127,000. Who gets what depends entirely on what you wrote down.

The spread between the top row and the bottom row is $47,630 for the same two people, the same house and the same five years. The only variable is which sentence went on the deed.

The middle row is what most couples actually mean when they say they want it to be fair: each gets their own money back, then they share what the house earned. Nobody buying a house as an unmarried couple gets that outcome by accident — it has to be written down.

7. What Goes in a Cohabitation Property Agreement

Quick Answer: A cohabitation property agreement is an ordinary contract between two co-owners, and it does the job a divorce court would do for a married couple. Write it before closing, while you still agree. It typically costs less than the title insurance premium on the same purchase.

Work through these six items in order. Each one is a question a judge would otherwise have to answer for you, slowly and expensively, and each one is standard practice for anyone buying a house as an unmarried couple.

1. Record who paid what at closing. Down payment, closing costs and repair money, by name and amount. Everyone remembers this differently three years later.
2. Set the ownership percentages. State them as numbers and match them to the deed. Where the two disagree, the deed usually wins.
3. Split the monthly bills on paper. Mortgage, taxes, insurance, utilities and repairs — plus the rule for when one person covers the other’s share: a loan, a gift, or extra equity.
4. Write the buyout clause. Who gets first option to buy the other out, how long they have to arrange financing, and how the price is set. An independent appraisal is the standard answer.
5. Agree the forced-sale trigger. If neither partner can buy the other out in time, the home is listed. Name the deadline in days, not “promptly”.
6. Add a mediation step before court. One session with a neutral mediator settles most co-owner disputes for a fraction of what a partition lawsuit costs.

Have each partner review it with their own attorney rather than sharing one. A single lawyer cannot represent both sides of a contract, and an agreement signed without independent advice is easier to challenge later.

8. What Happens If One of You Dies

Quick Answer: Without a will or a survivorship deed, a deceased partner’s share goes to their legal relatives — parents, siblings, children — not to you. The mortgage does not die with them either, so the surviving partner keeps the debt while possibly losing half the house they are paying for.

This is the scenario that turns a manageable loss into a housing crisis, and it is the strongest argument for treating the estate paperwork as part of buying a house as an unmarried couple rather than something to sort out later. Four documents prevent almost all of it.

• A will for each partner. The only way a tenants-in-common share reaches a partner rather than a relative. Intestacy laws have never heard of your relationship.
• A survivorship deed, if that is what you want. Joint tenancy passes the home outside probate, which is faster and cheaper — but it also overrides whatever your will says.
• Enough term life insurance to clear the loan. Each partner names the other as beneficiary, in an amount that pays off the mortgage balance. This is the cheapest of the four by a wide margin.
• A healthcare proxy and financial power of attorney. Without them, an unmarried partner has no authority to make decisions or access accounts during a hospital stay.

Check the beneficiary designations on retirement accounts too. Those pass by designation and ignore your will entirely, so an ex-spouse or a parent named years ago still collects.

9. The Bottom Line

Quick Answer: Buying a house as an unmarried couple is a paperwork problem, not a relationship problem. Pick the title form deliberately, sign a cohabitation property agreement before closing, and make sure each of you has a will. Get pre-approved knowing which names go on the loan.

Our advice: do all three in the two weeks between offer acceptance and closing. That is the window when both partners are motivated, the numbers are fresh, and nothing has gone wrong yet. An attorney hour and a notary appointment cover it.

That is how DollarVisor approaches every money decision: federal data, state-level figures and the math shown in full. Companies cannot pay for placement in our rankings. If one of you is carrying the file alone, start with our guide to buying a house as a single person.

This article is information, not legal, tax or financial advice. See our disclaimer.

10. Frequently Asked Questions

1. Can an unmarried couple get a mortgage together?

Yes. Lenders cannot consider marital status when deciding whether to approve you, so two unmarried co-borrowers are underwritten exactly like a married couple. Both incomes count, both debts count, and the loan is priced off the lower of the two credit scores.

2. Should both names be on the deed and the mortgage?

They are separate choices. Being on the mortgage means you owe the whole debt; being on the deed means you own part of the home. A partner with weaker credit can be left off the loan to protect the rate and still be added to the deed, so their ownership is intact without their credit file setting the pricing.

3. What happens to the house if we break up?

Whatever the deed and your written agreement say. There is no divorce court for unmarried co-owners. If nothing is written down, either partner can file a partition action, which asks a judge to force a sale and divide the proceeds — slow, public and expensive for both of you.

4. Do we need a cohabitation agreement if we are both on the deed?

Yes. The deed only records ownership shares, so anyone buying a house as an unmarried couple needs the agreement as well. The deed says nothing about who pays which bill, who can buy the other out, at what price, or how long they have to arrange it. Those are the questions that actually cause disputes.

5. Does living together long enough make us legally married?

Only in Colorado, the District of Columbia, Iowa, Kansas, Montana, New Hampshire, Oklahoma, Rhode Island, Texas and Utah, and even there it takes more than time — you generally have to agree to be married and present yourselves publicly that way. In the remaining 41 states, no length of cohabitation creates a new marriage or any property rights.