The Legal and Financial Checklist Before Moving In Together (Unmarried, 2026)

What moving in does and does not give you

Here is the part nobody tells you at the lease signing. Sharing an address, a bed, and a Netflix login does not give you and your partner a single legal right to each other. Not after a month, not after a decade. The law sees two roommates who happen to be in love.

Married couples get a long list of protections handed to them automatically: the right to inherit, to make medical decisions, to access each other's health records, to collect Social Security survivor benefits, to transfer assets tax-free. An unmarried couple gets none of those by default. You get them only if you build them, document by document. That is the whole reason this checklist exists, and it is genuinely manageable once you know what to do.

The money talk to have before you sign anything

Before the lease, before the joint account, before the furniture-shopping trip, have the unglamorous conversation. Money is the thing couples fight about most, and almost all of those fights are really about surprises. Get the surprises out of the way first.

Lay it all on the table, both of you, on the same evening:

• Income. What each of you actually takes home, not the gross salary.
• Debt, all of it. Student loans, credit-card balances, car loans, medical debt, money owed to family, a tax bill, a past bankruptcy. The number, not a hand-wave.
• Credit. Pull your own reports (free weekly at the federally authorized site, AnnualCreditReport.com) and compare. A landlord, a lender, and a future co-signer will all see these scores, so you should see them first.
• Spending style. Saver or spender, and how far apart you are. This is the gap that quietly erodes a relationship.
• The split. Are you going 50/50, or proportional to income? Write down the actual dollar figures for rent, utilities, groceries, and the recurring subscriptions.

The lease: whose name, and the liability trap

Most couples moving in together are renting, and the lease is the first legal document you will sign as a household. How you sign it matters more than people expect.

If you both sign: joint and several liability

When two tenants sign one lease, almost every lease makes you jointly and severally liable. In plain terms: the landlord can come after either one of you for the entire rent, not just your half. If your partner stops paying, moves out, or vanishes, you are on the hook for 100% of the rent and any damage, and it is your problem to chase them for their share, not the landlord's. The upside is that you are both legal tenants with equal right to be there, and neither can throw the other out.

If only one signs

The person on the lease is the tenant. The other partner is, legally, a guest or occupant with no tenancy rights, even if they pay half the rent every month. The non-signing partner can be asked to leave, and during a breakup the signing partner usually controls the apartment. If you go this route, at least add the second partner as an authorized occupant in writing, and put your real arrangement (who pays what, what happens if you split) into the cohabitation agreement below.

Bank accounts: joint, separate, or yours-mine-ours

There is no single right answer, but there is one rule you must understand before you open anything together: on a joint account, either owner can legally withdraw every dollar at any time, with no permission and no recourse for the other. That is not a bank glitch, it is how joint accounts work. It is convenient when you trust each other and a catastrophe when trust breaks down during a split.

The three common setups:

• Fully separate. You each keep your own accounts and reimburse each other (a shared spreadsheet or a bill-split app). Cleanest legally, the most friction day to day.
• Fully joint. One pot, both names. Simple and transparent, but it exposes everything you have to a partner's withdrawals and, if they have creditors or a judgment, potentially to those too.
• Yours, mine, and ours. Each keeps a personal account, plus one joint account you both fund for shared bills. This is what most cohabiting couples land on. Fund the joint account with a set amount each (proportional to income is the usual fair split) and pay the household from there.

The retitling and pay-off gift-tax trap

This is the trap most articles miss, because it only bites unmarried couples. Spouses can move unlimited money and property between themselves tax-free. Unmarried partners cannot. So a generous move can quietly become a reportable gift to the IRS.

The numbers for 2026, straight from the IRS: you can give any one person up to $19,000 a year with no gift-tax paperwork (the annual exclusion). Above that, you file Form 709. The lifetime exemption that the excess eats into is $15,000,000 per person, so for almost everyone the form is a filing, not a tax bill. The trap is the $19,000 line, not the $15M one.

Where unmarried couples trip:

• Adding a partner to a deed you own. This is the clear one. Put your partner on the title of a $400,000 house you own outright and you have made a completed gift of roughly $200,000 (half the value) the day it is recorded. That is reportable on Form 709.
• Paying off a partner's loan. Write a check that clears their $30,000 in student debt and you have given them $30,000. Reportable above the annual exclusion.
• A joint bank account works differently. Adding your partner to an account you funded is not a completed gift when you open it. It becomes a gift only when they withdraw money they did not put in. So if you fund a joint account and your partner draws out $25,000 that was all yours, that withdrawal is the gift.

The cohabitation agreement (your most important document)

A cohabitation agreement is a written contract between two unmarried partners that spells out the money: who owns what, who pays what, and what happens to it all if you break up. It is the single most useful document on this list, because it is the one that does the job marriage would have done by default.

And it is enforceable. The landmark case is Marvin v. Marvin (1976), where the California Supreme Court held that unmarried partners can enforce express and even implied agreements about property and support. That is where the word "palimony" comes from. The takeaway: courts treat your agreement as an ordinary contract, not as a marriage. Most states recognize cohabitation agreements, though the details vary, so have a local attorney check yours.

Put these in it:

• Who owns what now. List the big assets each of you brings in (car, savings, the couch, the dog) so there is no fight later about what was "ours."
• How you split expenses. Rent, utilities, groceries, the percentages or dollar amounts.
• What happens to shared purchases on a breakup. Furniture, a car bought together, a pet. Decide who keeps what or how you sell and divide.
• Property and contributions. If one of you pays more toward a home or a shared asset, record it, so a contribution is not mistaken for a gift.
• Debt. Each person's debt stays theirs. Spell it out.
• What it is not. A statement that you are not married and do not intend the agreement to create a marriage, which heads off any accidental-common-law-marriage argument.

The five documents marriage would have given you

If one of you is incapacitated or dies, the default rules favor a spouse and blood relatives, and leave an unmarried partner with nothing and no authority. Five documents close that gap. This is the short version; our full estate planning checklist for unmarried couples walks through each one, the 2026 tax gaps, and the titling choices in detail.

Insurance, benefits, and the Social Security gap

Moving in is the moment to align your coverage, and to be clear-eyed about the benefits you will never get without a marriage license.

• Renters insurance. A standard policy usually covers only the named policyholder and relatives, and an unmarried partner is not a relative. Either name both partners on one policy (ask the insurer; not all allow it) or each carry your own. Do not assume one policy quietly covers both of you.
• Auto insurance. If you share a car or a household, tell the insurer. Many require all licensed drivers in the home to be listed, and a partner driving an "uninsured" car can create a claim nightmare.
• Health insurance. Some employers and a few states offer domestic-partner coverage, but it is far from universal, and unlike spousal coverage the value of employer-paid partner premiums is usually taxable income to you. Check what your employer actually offers before you assume your partner can hop on your plan.
• Beneficiaries. Name your partner on life insurance and retirement accounts deliberately (see above). This is the one benefit you fully control.

Common-law marriage: the accidental kind, and the myth

Two things to get straight, because the internet butchers both.

The 7-year rule is a myth

Living together for seven years (or any number of years) does not make you married anywhere in the United States. Duration alone creates nothing. In Texas, for example, an informal (common-law) marriage requires three things at once under Texas Family Code 2.401: you both agree you are married, you live together as a married couple, and you hold yourselves out to others as married. There is no time requirement in the statute. So if you are deliberately staying unmarried, plan as an unmarried couple, full stop.

But a few states can marry you by accident

The flip side: in a small number of states, if you do call each other husband and wife in public, file joint taxes, and present as married, a court can later find you are common-law married, with all the divorce and inheritance consequences that brings. The states that still let a couple form a new common-law marriage are Colorado, Iowa, Kansas, Montana, Oklahoma, Rhode Island, Texas, and the District of Columbia. New Hampshire recognizes one only for inheritance after a death, and Utah only if a court or agency says so.

The printable move-in checklist and worksheet

Two tools competitors do not give you. First, the checklist. Work down it before and just after you move in, and bring the legal items to an attorney in your state.

Second, the worksheet that turns vague intentions into a record. Fill in every row before you commingle anything. The "survivorship" column only applies to a home you co-own, and it decides whether your share automatically goes to your partner (joint tenancy with right of survivorship) or passes through your will (tenants in common).