Wisconsin does not recognize common law marriage and has not since 1917. Living together for years, sharing a last name, raising children, or filing joint bills does not make you legally married in Wisconsin. The only way to become married in this state is to get a marriage license and hold a ceremony. There is one narrow exception worth knowing: if you formed a valid common law marriage while living in a state that allows them, Wisconsin will honor it.
How You Actually Become Married in Wisconsin
Wisconsin law requires three things: a marriage license, mutual declarations before an authorized officiant, and at least two competent adult witnesses. Active-duty military members only need one witness. Authorized officiants include ordained clergy, judges at any level, and circuit court commissioners. The couple can also marry each other without an officiant if they do so according to the customs of a religious society or denomination to which one of them belongs.1Wisconsin State Legislature. Wisconsin Statutes 765.16 – Marriage Contract, How Made; Officiating Person
No amount of cohabitation substitutes for these steps. If you skipped the license and the ceremony, you are not married under Wisconsin law, and the state’s divorce, property division, and spousal support rules do not apply to you when the relationship ends.
Common Law Marriages Formed in Other States
Wisconsin will treat you as married if you formed a valid common law marriage in a state that permits them. A handful of states still allow new common law marriages, including Colorado, Kansas, Texas, Iowa, and Montana. Rhode Island and Oklahoma recognize them through case law rather than statute.2National Conference of State Legislatures. Common Law Marriage by State Once Wisconsin recognizes your marriage, you are married for every legal purpose: property, support, inheritance, and, if the relationship ends, a formal divorce.3Social Security Administration. POMS GN 00305.075 – State Laws on Validity of Common-Law Non-Ceremonial Marriages
Weekend Trips Don’t Count
You cannot fly to Iowa for a weekend and come back common-law married. The Wisconsin Supreme Court held in the 1949 Van Schaick’s Estate decision that brief visits to a common law marriage state do not produce a marriage Wisconsin must recognize.4Social Security Administration. POMS PR 05610.055 – Wisconsin The couple must have been actually domiciled in the other state at the time the marriage was formed.
Proving It
If you need to establish an out-of-state common law marriage, whether for Social Security survivor benefits, an inheritance dispute, or a divorce filing, you will need documentation. The Social Security Administration looks for signed statements from both spouses (or the surviving spouse), statements from blood relatives, and supporting records: joint mortgage papers, shared bank accounts, insurance policies naming both partners.5Social Security Administration. SSA Handbook 1717 – Evidence of Common-Law Marriage Wisconsin courts evaluating the same question look for similar proof.
What Unmarried Couples Can Still Do
Not being married closes off Wisconsin’s divorce statutes, but it does not leave you without legal tools. Two matter most: property claims under Watts, and a cohabitation agreement drawn up before anything goes wrong.
Watts Claims After a Breakup
The Wisconsin Supreme Court’s 1987 decision in Watts v. Watts held that unmarried cohabitants can bring three kinds of property claims against each other:6Justia. Watts v. Watts – 1987 – Wisconsin Supreme Court Decisions
- Breach of an express or implied agreement to share property built through joint effort.
- Unjust enrichment, where a court can impose a constructive trust so one partner does not walk away with property the other helped create.
- Partition of jointly owned property.
Wisconsin’s family code preserves these claims, stating that the code “does not preclude an unmarried cohabitant from asserting contract and property claims against the other cohabitant.”7Wisconsin State Legislature. Wisconsin Statutes 765.001 – Title, Intent and Construction of Chs. 765 to 768 In one Wisconsin case, a woman received half the sale proceeds of a cabin titled solely in her partner’s name because her domestic labor had freed his time and earnings to build it. These claims work, but you have to prove your contributions, and litigation is expensive.
Cohabitation Agreements
A cohabitation agreement is a written contract between unmarried partners covering how property, income, debts, and shared expenses will be handled during the relationship and if it ends. Wisconsin courts enforce these under standard contract law. A well-drafted agreement is far easier to enforce than a Watts claim reconstructed years later, and having an attorney prepare one usually runs a few hundred to a couple thousand dollars.
Estate Planning and Healthcare: The Biggest Gap
The absence of a legal marriage creates its steepest consequences around death and medical emergencies, and this is where unmarried couples most often get blindsided.
Inheritance
If your partner dies without a will, Wisconsin’s intestate succession statute controls. The estate passes to a surviving spouse or registered domestic partner, then children, then parents, then siblings.8Wisconsin State Legislature. Wisconsin Statutes Chapter 852 – Intestate Succession An unmarried partner is not on that list. You could share a home for decades and inherit nothing.
Wisconsin’s Chapter 770 domestic partnership registry once provided some inheritance rights, but it was limited to same-sex couples and stopped accepting new applications on April 1, 2018.9Wisconsin State Legislature. Wisconsin Statutes Chapter 770 – Domestic Partnership For nearly every unmarried couple today, the only reliable way to leave assets to a partner is a will, a trust, or a beneficiary designation on individual accounts.
Healthcare Decisions
If your partner is incapacitated, Wisconsin law does not automatically give you decision-making authority. Federally funded hospitals must let patients choose their own visitors, including a partner or friend, but visitation is not the same as making medical calls.10HHS.gov. FAQs on Patient Visitation at Certain Federally Funded Entities and Facilities Without documentation, decisions default to the patient’s closest legal relative.
Wisconsin’s Chapter 155 lets you name your partner as your healthcare agent with authority to make medical decisions if you cannot.11Wisconsin State Legislature. Wisconsin Statutes Chapter 155 – Power of Attorney for Health Care The document can be signed remotely by video if a Wisconsin-licensed attorney supervises. Every unmarried couple should have one; without it, your partner may be shut out of the room when it matters most.
Survivor and Beneficiary Benefits
Social Security pays survivor benefits only to legal spouses, including partners in a recognized common law marriage. If neither state recognizes your relationship as a marriage, your partner collects nothing on your record no matter how long you were together.12Social Security Administration. 20 CFR 404.726 – Evidence of Common-Law Marriage Employer life insurance and pensions often default to a legal spouse as well. Unmarried partners should check every beneficiary designation on retirement accounts, life insurance, and payable-on-death bank accounts and update them by name.
Tax Treatment
Unmarried partners cannot file federal taxes jointly. The IRS looks only at whether you are legally married on December 31, so no length of cohabitation changes your status; each partner files as single or, with a qualifying dependent, as head of household.13Internal Revenue Service. Filing Status Married joint filers often get wider brackets and higher standard deductions, and unmarried couples miss those benefits entirely.
Transfers between unmarried partners can also trigger gift tax rules that would not apply to spouses. Adding a partner’s name to a house deed, for example, can count as a taxable gift of half the value, subject to the annual exclusion and lifetime exemption in effect that year.14Internal Revenue Service. What’s New – Estate and Gift Tax Married spouses can move property between themselves without that concern.