Co-ownership of real property takes one of four main forms in the United States: tenancy in common, joint tenancy with right of survivorship, tenancy by the entirety, and in a handful of states, community property with right of survivorship. The form written into your deed decides who inherits a share when an owner dies, whether a co-owner’s creditors can reach the house, how the IRS treats the property when it changes hands, and how hard it is to get out if the arrangement sours. Picking the wrong one, or letting the deed default to whatever the state uses when the language is vague, can cost tens of thousands of dollars and years of litigation.
The Four Forms of Co-Ownership
Tenancy in Common
Tenancy in common is the most flexible structure and, in most states, the default when a deed names more than one owner without saying anything else.1Legal Information Institute. Undivided Interest Shares can be unequal: one person might hold 60 percent while two others each hold 20. Every owner has the right to use the whole property regardless of share size. Each owner can sell, gift, mortgage, or will away their share without asking the others.
The feature that catches people off guard is what happens at death. A tenant in common’s share passes through their estate to whoever their will names, or to their heirs under state intestacy law if there is no will. It does not go to the surviving co-owners. Unmarried couples who put both names on a deed and assume the survivor will inherit are often wrong.
Joint Tenancy With Right of Survivorship
Joint tenancy requires four conditions, known as the unities of time, title, interest, and possession: every owner must take their interest at the same moment, through the same deed, in equal shares, with equal rights to the whole property. Break any one of them and the joint tenancy collapses into a tenancy in common.2Legal Information Institute. Joint Tenancy
The payoff is the right of survivorship. When one joint tenant dies, their share passes automatically to the surviving owners outside probate; the survivors clear title by recording a death certificate and a short affidavit.3Justia. Joint Ownership With Right of Survivorship and Legally Transferring Property The cost of that convenience is rigidity. No joint tenant can leave their share to anyone outside the group through a will, because the share evaporates to the survivors at the moment of death. And any owner can quietly destroy the joint tenancy by transferring their interest to a third party, which strips the others of their survivorship rights over that share.
Tenancy by the Entirety
Tenancy by the entirety is available only to married couples and is recognized in roughly 25 states plus the District of Columbia. It carries the same survivorship feature as a joint tenancy, with an added protection: neither spouse can sell, mortgage, or transfer their interest without the other’s signature.4Legal Information Institute. Tenancy by the Entirety The law treats the couple as a single owner rather than two people holding halves.
The practical consequence shows up when one spouse has debts the other does not. In entirety states, a creditor holding a judgment against only one spouse generally cannot force a sale or attach a lien to property held this way. The creditor has to have a judgment against both. That shield disappears at divorce, which usually converts the ownership to a tenancy in common.
Community Property With Right of Survivorship
In community property states, including Arizona, California, Nevada, Texas, and Washington, married couples can elect a hybrid form called community property with right of survivorship. It avoids probate the same way joint tenancy does, but delivers a much better tax result when one spouse dies: the entire property gets a new cost basis equal to its fair market value on the date of death. In a standard joint tenancy between spouses, only the deceased spouse’s half gets that adjustment, and the surviving spouse keeps the original basis on the other half. On a home purchased for $200,000 and worth $600,000 at the first death, a surviving joint tenant carries a blended basis of $400,000; a surviving spouse holding community property with survivorship carries a full $600,000 basis and owes no capital gains tax if the home sells at that price. Couples in community property states should ask about this option by name rather than defaulting to joint tenancy.
What Every Co-Owner Can and Must Do
Possession
Every co-owner has the right to occupy and use the whole property, no matter how small their share. A 10 percent owner has the same right to walk in the front door as a 90 percent owner. No co-owner can lock out another or claim exclusive use of a room without the others’ consent.
When one owner does shut another out, the law calls it ouster, and the excluded owner can sue for a share of the property’s fair rental value for the period they were kept out. The line between a co-owner who simply chose not to live there and one who was actually refused entry is often blurry, and fights over fair rental value are a frequent and expensive source of co-ownership litigation.
Expenses and the Right of Contribution
Co-owners split property taxes, mortgage payments, insurance, and necessary repairs in proportion to their ownership interests. An owner who covers more than their share can bring an action for contribution and recover the overage from the others, usually by crediting them out of the sale proceeds in a later partition or sale.
Contribution works cleanly for expenses that preserve the property, such as taxes, insurance, and structural repairs. Improvements are harder. If one owner installs a pool or renovates the kitchen without the others’ approval, courts often cap reimbursement at the amount the improvement actually added to market value, which is usually less than the cost.
Rent
If the property is rented, each co-owner is entitled to a proportional share of the income. A co-owner who collects rent and keeps it all owes the others their shares. For tax reporting, each co-owner reports only their own portion of the rental income and deductible expenses on IRS Schedule E.5Internal Revenue Service. Tips on Rental Real Estate Income, Deductions and Recordkeeping
The Mortgage Trap
Co-owners who sign a mortgage together almost always sign under a joint and several liability clause. The lender can pursue any single borrower for the entire unpaid balance, not just that borrower’s share. If one co-owner stops paying, the others are on the hook for the whole mortgage, regardless of any side agreement about who was supposed to pay what. This is the single biggest financial risk in co-ownership, and most co-owners do not grasp it until a relationship breaks down and one person stops paying.
Why a Written Co-Ownership Agreement Matters
The deed establishes who owns what. It says nothing about who pays for the new roof, what happens when one owner wants out, how the property will be valued in a buyout, or how disputes get resolved. A separate written co-ownership agreement fills that gap, and skipping it is the most common mistake co-owners make. The agreement matters most for tenants in common, who have none of the structural protections built into joint tenancy or tenancy by the entirety.
A workable agreement at minimum spells out how expenses are divided and what happens when someone falls behind, a buyout mechanism with an agreed valuation method (independent appraisal or a formula), a right of first refusal for the remaining owners before a share can be sold to an outsider, a dispute-resolution clause requiring mediation or arbitration before any lawsuit, and what happens to a share if an owner dies or loses capacity. Lenders sometimes require a formal agreement as a condition of financing, especially for investment properties held by tenants in common.6Fannie Mae. Tenancy-in-Common Agreement Even where no lender demands one, the cost of drafting an agreement up front is a small fraction of what a contested partition action costs later.
Creditor Exposure
How a creditor can reach co-owned property depends almost entirely on the ownership form.
In a tenancy in common, a judgment creditor of one owner can place a lien on that owner’s share and, in some states, force a partition sale to collect. The other owners can end up as involuntary sellers because of debts they had nothing to do with. Joint tenancy complicates the creditor’s path somewhat but does not eliminate it: the debtor’s interest can still be reached while they are alive.
Tenancy by the entirety is the strongest shield. Because neither spouse owns a severable share, a creditor of only one spouse generally cannot attach a lien to the property. The creditor needs a judgment against both. That protection carries into bankruptcy: the Bankruptcy Code lets a debtor exempt property held as tenants by the entirety if applicable state law would exempt it from creditor claims outside bankruptcy.7Office of the Law Revision Counsel. United States Code Title 11 – 522
Homestead exemptions sit on top of all of this and can protect some or all of a home’s equity from forced sale regardless of how title is held. They vary widely by state, so anyone relying on ownership structure alone for protection may be reading their exposure wrong in either direction.
Tax Consequences
Adding Someone to the Deed Is a Gift
Putting another person on the deed is treated as a federal gift if they do not pay fair market value for the share they receive. The IRS defines a taxable gift as any transfer for less than full consideration.8Internal Revenue Service. Frequently Asked Questions on Gift Taxes For 2026, a person can give up to $19,000 per recipient per year without filing a gift tax return. Larger gifts require a return but do not produce actual tax unless the giver has exceeded their lifetime exemption.9Internal Revenue Service. What’s New – Estate and Gift Tax A parent who adds a child to a deed on a $400,000 home has made a $200,000 gift, and the return is required.
Basis at Death
When a co-owner dies, the property’s tax basis resets to fair market value, but only for the portion included in the deceased owner’s estate. For non-spouse joint tenants, the included portion is based on how much each owner originally contributed toward the purchase price. For married couples in a joint tenancy or tenancy by the entirety, federal law automatically includes exactly half of the property’s value in the deceased spouse’s estate, and that half receives the stepped-up basis while the survivor’s half keeps its original basis.10Office of the Law Revision Counsel. United States Code Title 26 – 204011Office of the Law Revision Counsel. United States Code Title 26 – 1014 Community property with right of survivorship is the exception that steps up both halves, as described earlier.
Getting Out
Voluntary Transfer and Severance
The simplest exit is a voluntary sale or gift of one owner’s share. A tenant in common can sell to anyone at any time without affecting the other owners’ interests. When a joint tenant transfers their share, the transfer breaks the four unities and severs the joint tenancy as to that share. The buyer takes as a tenant in common with the remaining owners, who keep joint tenancy among themselves.2Legal Information Institute. Joint Tenancy
Joint tenants can sever by written mutual agreement. A joint tenant who wants out unilaterally, without a buyer, can execute and record a deed from themselves to themselves, which breaks the unity of title and ends the other owners’ survivorship claim to that share.
Partition
When co-owners cannot agree, any owner can file a partition action and ask the court to force a resolution. Courts partition in one of two ways. A partition in kind physically divides the land, giving each owner sole title to a piece of it; this works for large rural tracts and almost never for a single house. When physical division is not practical, the court orders a partition by sale and divides the proceeds according to each owner’s interest and documented financial contributions.
Partition is expensive. Attorney fees and court costs are paid up front by the parties, though courts can order reimbursement from the sale proceeds. A straightforward case commonly runs $10,000 to $30,000, and a contested one with fights over contributions, improvements, or valuation runs considerably more. The court’s final accounting credits owners who paid more than their share of taxes, mortgage, and necessary repairs over the years, and charges owners who collected rent or kept the property to themselves.
Several states have adopted the Uniform Partition of Heirs Property Act, which adds protections when inherited property is at stake. Co-owners get a right of first refusal to buy out the party seeking partition, and the court must order an independent appraisal rather than relying on an open auction. These rules were written to stop the forced loss of family land passed down through generations.
A Note on Medicaid
Co-ownership can affect eligibility for Medicaid long-term care benefits and expose the property to estate recovery after the recipient’s death. Federal law lets states define “estate” broadly enough to include property that passed to a survivor by joint tenancy, tenancy in common, life estates, or living trusts, and it treats transfers that reduce an individual’s ownership interest in jointly held property as a transfer that can trigger a Medicaid penalty period.12Office of the Law Revision Counsel. United States Code Title 42 – 1396p Adding a family member to a deed to shield a home from Medicaid can backfire. Anyone considering ownership changes with Medicaid in mind should see an elder law attorney before signing anything.