Unmarried couples can obtain a joint mortgage, but doing so binds both partners to total debt liability without the automatic legal protections of marital property law. To buy safely, partners must choose an appropriate deed title (such as Tenancy in Common or Joint Tenancy), agree on proportional down payment and monthly expense splits, and draft a legally binding co-ownership agreement that defines buyout terms, dispute procedures, and exit strategies before closing.

Purchasing real estate together is one of the most significant financial commitments two people can make. When buying as an unmarried couple, the process involves distinct underwriting rules, complex property title selections, and unique long-term financial liabilities that differ substantially from married homeownership.

How Mortgage Lenders Underwrite Unmarried Co-Borrowers

When an unmarried couple applies for a joint mortgage, underwriters evaluate both applicants as independent financial entities rather than a single marital unit. Lenders review each person's credit profile, verifiable income, monthly debt obligations, and employment history. While combining two incomes can substantially lower your cumulative debt-to-income (DTI) ratio and expand your maximum borrowing capacity, lenders calculate qualification based on the lower middle credit score between the two borrowers. If one partner has exceptional credit while the other has a moderate or low score, the lower score dictates the pricing tiers, interest rates, and loan program eligibility for the entire application.

Under federal lending guidelines, both co-borrowers assume joint and several liability for the full balance of the debt. This legal standard means the lender does not divide the monthly payment into equal halves; instead, each individual is 100 percent responsible for ensuring the full mortgage amount is paid on time every month. If one partner loses their income or refuses to contribute, the remaining partner must pay the complete mortgage obligation or risk foreclosure, severe credit damage, and legal collection efforts against both names on the note.

Further reading: CFPB: Buying a house

A fundamental point of confusion for many co-buying couples is the critical legal difference between the mortgage note and the property deed. The mortgage note (or deed of trust) is the financial contract outlining your personal promise to repay the borrowed funds to the lender. In contrast, the property deed represents actual legal ownership and title to the physical real estate recorded in local county land records. Being listed on the mortgage creates financial liability, but it does not automatically confer ownership rights unless your name is also recorded on the deed.

This structural separation can create dangerous imbalances if couples do not structure their documentation deliberately. For example, if one partner with stronger credit applies for the mortgage alone to secure a lower interest rate, but both partners are placed on the property deed, the non-borrowing partner gains an equity stake without carrying any legal responsibility for the loan debt. Conversely, if one partner is placed on the loan to satisfy income requirements but omitted from the deed, they carry total debt liability with zero legal claim to the property. Lenders and title companies require precise coordination to ensure ownership allocations mirror each partner's intended financial commitment.

Further reading: CFPB: Buying a house

Titling Options for Unmarried Couples: TIC, Joint Tenancy, and Sole Ownership

Because unmarried partners do not qualify for Tenancy by the Entirety—a protective marital title available in many states—they must deliberately choose how to hold legal title to their home. The two primary co-ownership options are Tenancy in Common and Joint Tenancy with Right of Survivorship, each serving distinct financial and estate planning priorities.

Tenancy in Common (TIC) is often the most flexible structure for unmarried buyers, especially when partners contribute unequal amounts toward the purchase. Under a TIC structure, partners can own custom percentages of the property, such as a 60/40 or 75/25 split, reflecting their respective financial contributions. TIC ownership does not include an automatic right of survivorship; if one partner passes away, their ownership percentage does not automatically transfer to the surviving partner. Instead, their share transfers according to their last will and testament or through state intestacy probate laws, meaning an unmarried partner could end up co-owning the home with their deceased partner's parents or siblings if estate documents are neglected.

Joint Tenancy with Right of Survivorship (JTWROS) requires equal ownership shares (a strict 50/50 division) regardless of who contributed more cash. The defining feature of JTWROS is that when one joint tenant dies, their ownership share automatically transfers directly to the surviving partner without going through the probate process. While this provides seamless survivorship protection, it requires equal financial entitlement, which may feel inequitable if one partner paid the entire down payment. A third option, Sole Ownership, concentrates all legal title in one person's name, leaving the non-titled partner with no equity rights unless explicit legal agreements are established outside the deed.

Upfront and Ongoing Cost Breakdown for Unmarried Co-Buyers

Navigating homebuying costs requires total transparency regarding both initial transaction expenses and long-term operating costs. Upfront closing costs typically encompass loan origination fees, appraisal charges, title search and lender's title insurance policies, government recording fees, transfer taxes, and initial escrow reserves for property taxes and homeowners insurance. When pooling funds for the down payment and closing fees, unmarried partners must carefully document the origin of all capital, as lenders closely scrutinize bank statements to verify that funds do not stem from undisclosed personal loans.

Beyond closing, the ongoing carrying costs of homeownership extend far beyond the baseline principal and interest payment. A comprehensive monthly housing budget must account for local property taxes, private mortgage insurance (PMI) if putting down less than twenty percent, hazard insurance premiums, special flood hazard insurance where applicable, homeowners association (HOA) dues, utilities, and a dedicated maintenance reserve. Establishing how these recurring bills will be funded prevents friction and preserves the property's financial stability over time.

Further reading: CFPB: Buying a house

Structuring Expense Splits: Equal vs. Proportional Models

Unmarried couples generally rely on one of two practical budgeting frameworks to manage their ongoing housing obligations: the equal split model or the proportional contribution model. Selecting the right framework depends on income parity, down payment contributions, and long-term equity expectations.

Under the equal split framework, both partners contribute exactly 50 percent of the monthly mortgage, taxes, insurance, and maintenance costs regardless of their individual earnings. This approach is straightforward and aligns naturally with equal equity ownership, such as a 50/50 Joint Tenancy. However, if one partner earns significantly less than the other, an equal split can strain the lower-earning partner's finances and limit their ability to build personal emergency savings.

Under the proportional model, monthly housing contributions are weighted according to each partner's share of total household income. For instance, if Partner A earns 60 percent of the combined income and Partner B earns 40 percent, monthly housing costs are divided along that same 60/40 ratio. Couples using this method must decide whether this proportional payment translates into unequal equity accumulation or whether the higher earner's larger contribution is viewed as living support while maintaining equal equity. Opening a dedicated joint checking account strictly for property expenses—funded monthly by automatic transfers from each partner's personal account—keeps financial boundaries clean and trackable.

Drafting a Legally Binding Cohabitation and Co-Ownership Agreement

Unlike married couples who have access to established family court systems that govern asset division during a divorce, unmarried partners have no default legal framework to resolve property disputes upon separation. Without a binding written contract, unwinding a shared real estate asset can quickly devolve into an expensive and adversarial civil court battle. A comprehensive cohabitation and property agreement drafted with the assistance of a real estate or family law attorney creates clear ground rules while both parties are on good terms.

A thorough co-ownership agreement should explicitly detail initial down payment contributions, ongoing equity allocations, and step-by-step procedures for managing relationship changes or financial hardships. It must define how home improvement costs and sweat equity are credited, how decisions regarding property maintenance or renovations are approved, and what happens if one partner faces job loss, disability, or temporary inability to pay their agreed share.

Exit Strategies: Managing Breakups, Buyouts, and Partition Actions

The most crucial component of any co-buying plan is a clear, objective exit mechanism. If the relationship ends or one partner wishes to move on, the agreement should outline three primary paths: an amicable buyout by one partner, a cooperative sale on the open market, or, as a last resort, legal partition.

In a buyout scenario, the retaining partner must typically obtain an independent appraisal to determine current fair market value, calculate the departing partner's accumulated equity share, and secure a refinance loan in their name alone to release the departing partner from the existing mortgage note. Simply signing a quitclaim deed to transfer title does not remove an individual from mortgage liability; only a full loan refinance or a formal lender release can eliminate repayment responsibility. If neither partner can afford or desires a buyout, the agreement should mandate listing the property with a licensed real estate broker, specifying how sales proceeds or shortfalls are divided after paying closing commissions and loan balances.

When unmarried co-owners cannot reach an agreement and lack a binding dispute clause, their only legal recourse is filing a lawsuit for partition. In a partition action, a civil court judge orders the forced sale of the property at auction or through a court-appointed receiver. Partition litigation is notoriously slow, emotionally draining, and expensive, often consuming thousands of dollars in legal fees and court costs while frequently yielding a below-market sale price. A proactive co-ownership contract effectively waives or manages the right to partition, mandating mediation or structured buyout windows before any court intervention can occur.

Frequently asked questions

Can an unmarried couple get a mortgage if only one person is on the loan?

Yes, one partner can apply for the mortgage as a sole borrower using only their individual income and credit score. However, the non-borrowing partner will not have legal debt obligations, and the couple must carefully decide whether both names or only the borrower's name will appear on the property deed.

What happens if one partner stops paying their share of the mortgage?

Because mortgage notes establish joint and several liability, the lender expects the full monthly payment regardless of internal partner disagreements. The paying partner must cover the shortfall to prevent default and credit damage, and then seek financial reimbursement through the dispute mechanisms outlined in their private co-ownership agreement.

Does an unmarried partner automatically inherit the house if the other dies?

An unmarried partner only inherits automatically if the property is titled as Joint Tenancy with Right of Survivorship. If the property is titled under Tenancy in Common or Sole Ownership, the deceased partner's share passes to their designated heirs in a will or through state intestacy laws, not automatically to the surviving partner.

How do we remove an ex-partner's name from the mortgage after a separation?

Removing a name from a mortgage requires the remaining partner to formally refinance the loan into their individual name, qualify under their own financial profile, and execute a quitclaim deed to transfer full legal title. Some conventional and government loans allow loan assumptions with a release of liability, but this requires explicit approval from the lender.

Your next step

Schedule a consultation with an independent real estate attorney in your state to draft a customized co-ownership agreement before making an offer or locking in a mortgage rate.