Legally, marriage is a civil contract between two people that a state authorizes and records, and that the moment it takes effect creates an interlocking set of rights and obligations covering property, taxes, government benefits, medical decisions, immigration, inheritance, and debt. Every state writes its own rules for who can marry and how, but a marriage valid where it was performed is recognized in every other state. The financial stakes alone are substantial: married couples filing jointly in 2026 receive a standard deduction of $32,200, and assets can pass between spouses free of federal estate tax regardless of value.1Internal Revenue Service. IRS Releases Tax Inflation Adjustments for Tax Year 2026
What Makes a Marriage Legally Valid
A few requirements are universal. Both parties must enter the marriage voluntarily and must have the mental capacity to understand what they are agreeing to. Someone under duress, severely intoxicated, or unable to comprehend the nature of the contract cannot legally consent. Bigamy is prohibited everywhere, as are marriages between close relatives.
The minimum age to marry without special permission is 18 in every state. Beyond that, state law varies. Some states have banned marriage under 18 outright. Most allow 16- or 17-year-olds to marry with some combination of parental consent and judicial approval. A few states still have no statutory minimum once all exceptions are counted, though the trend is toward raising the floor. Rules in this area are changing quickly, so the current statute in your state is what controls.
On the question of who qualifies, the law is uniform. In Obergefell v. Hodges, the Supreme Court held that the Fourteenth Amendment guarantees same-sex couples the fundamental right to marry and requires every state to recognize lawful same-sex marriages performed elsewhere.2Justia US Supreme Court. Obergefell v Hodges, 576 US 644 (2015)
How You Enter a Marriage
A formal marriage begins with a license from a local government office, usually the county clerk. Both parties generally appear in person, bring government-issued identification, and pay a filing fee that typically runs from around $20 to over $100. If either person was previously married, proof the prior marriage ended — a divorce decree or death certificate — is usually required.
About 18 states impose a waiting period between license issuance and ceremony, most commonly one to three days, with Wisconsin at five. Many of these waits can be waived for hardship, military service, or completion of a premarital education course. Every license carries an expiration date; let it lapse before the ceremony and you reapply.
The ceremony itself can be civil or religious, but it must be performed by someone the state authorizes, such as a judge, justice of the peace, or ordained clergy. The officiant and often one or two witnesses sign the license, which goes back to the issuing office for recording. That recorded document is the official proof of the marriage.
Common Law Marriage
Not every legal marriage runs through a license. Colorado, Iowa, Kansas, Montana, Oklahoma, Rhode Island, Texas, and Utah, along with the District of Columbia, still allow new common law marriages, which form when a couple lives together, agrees to be married, and presents themselves to others as married.3National Conference of State Legislatures. Common Law Marriage by State A few other states recognize common law marriages established before a cutoff date but no longer permit new ones.
Once valid, a common law marriage carries the same legal weight as a ceremonial one. Ending it requires a formal divorce. Simply moving apart does not dissolve it, and the same property division and support rules apply.
Property and Inheritance Rights
Marriage changes how the law treats what you own, and the rules split along two systems. In the nine community property states — Arizona, California, Idaho, Louisiana, Nevada, New Mexico, Texas, Washington, and Wisconsin — most income earned and property acquired during the marriage belongs equally to both spouses, regardless of whose name is on the paycheck or the title. Alaska lets couples opt into community property by written agreement. The remaining states use equitable distribution, where a court divides marital property in a way the judge considers fair, which does not necessarily mean 50/50.
On the inheritance side, marriage activates the unlimited marital deduction in federal tax law. You can transfer any amount of assets to your spouse during life or at death without triggering federal gift or estate tax.4Office of the Law Revision Counsel. 26 USC 2056 – Bequests, Etc., to Surviving Spouse A spouse also typically becomes the default heir. Even in states that let you disinherit a spouse by will, most provide a minimum elective share guaranteeing the survivor a portion of the estate.
Tax and Social Security Rights
Married couples can file federal income taxes jointly or separately. Most do better filing jointly, because the joint brackets are wider than the single brackets at most income levels, and joint filing opens access to credits and deductions unavailable when filing separately.5Internal Revenue Service. Filing Status The 2026 standard deduction for joint filers is $32,200, double the $16,100 for single filers.1Internal Revenue Service. IRS Releases Tax Inflation Adjustments for Tax Year 2026
The math does not always favor marriage. When both spouses earn high incomes, their combined earnings can push them into a higher bracket than they would face individually. The 37% bracket for joint filers starts at a threshold that is less than double the single-filer threshold, which is where a marriage penalty still bites. Filing separately avoids it in some cases but costs you many deductions and credits. A joint return also makes both spouses liable for the accuracy of everything reported.
Social Security adds another layer. A spouse who earned less — or never worked in covered employment — can claim a spousal benefit worth up to 50% of the higher earner’s primary insurance amount, reduced to as low as 32.5% if claimed before full retirement age.6Social Security Administration. Benefits for Spouses You generally need to have been married at least one year to qualify, though the requirement is waived if you share a biological child.7Social Security Administration. What Are the Marriage Requirements to Receive Social Security Spouse’s Benefits Divorced spouses can still claim on an ex’s record if the marriage lasted at least 10 years, they have not remarried, and they are at least 62.
Survivor benefits are even larger. A surviving spouse can draw on the deceased spouse’s earnings record if the marriage lasted at least nine months, a requirement waived if the death was accidental or occurred in the line of duty.8Social Security Administration. Who Can Get Survivor Benefits The benefit can reach 100% of what the deceased was receiving or entitled to receive.
Medical, Workplace, and Courtroom Protections
When you marry, your spouse typically becomes your default next of kin for medical decisions. If you are incapacitated and have not designated someone else through an advance directive or healthcare power of attorney, doctors and hospitals will generally look to your spouse. Unmarried partners, however long they have been together, often have no automatic standing.
Marriage also triggers workplace rights. Under the Family and Medical Leave Act, eligible employees can take up to 12 weeks of unpaid, job-protected leave to care for a spouse with a serious health condition.9U.S. Department of Labor. Fact Sheet #28L: Leave Under the Family and Medical Leave Act for Spouse Marriage is a qualifying life event for employer health insurance, letting you add a spouse to your plan outside open enrollment. Federal employees must submit the change in a window running from 31 days before to 60 days after the marriage.10U.S. Office of Personnel Management. I’m Getting Married or Remarried
In court, marriage activates spousal privilege. The testimonial privilege means a spouse generally cannot be forced to testify against the other in a criminal case. The communications privilege protects private conversations between spouses from being disclosed. Neither privilege survives divorce, and neither applies when one spouse is suing or prosecuting the other.
Immigration Rights
Marriage to a U.S. citizen or lawful permanent resident is one of the most direct paths to a green card. The sponsoring spouse files a petition establishing the relationship and must show household income of at least 125% of the federal poverty guidelines to demonstrate they can support the incoming spouse.11U.S. Citizenship and Immigration Services. HHS Poverty Guidelines for Affidavit of Support Active-duty military sponsors need to meet only 100% of the guidelines.
If the marriage is less than two years old when the immigrant spouse receives permanent resident status, that status is conditional, and the couple must jointly petition to remove the conditions before the green card expires.12U.S. Citizenship and Immigration Services. Removing Conditions on Permanent Residence Based on Marriage If the marriage has ended by then, the immigrant spouse can file independently with a waiver, but the evidentiary burden is heavier.
Debt and Other Obligations
The rights come with liabilities. Marriage does not automatically make you responsible for your spouse’s existing debts; obligations incurred before the wedding remain the individual responsibility of the spouse who took them on. Debt accumulated during the marriage splits along the same community property versus equitable distribution line as assets.
In community property states, both spouses are generally liable for debts either incurs during the marriage, even if only one name is on the account, and creditors can pursue both spouses’ income and assets. In equitable distribution states, only the spouse who incurred the debt is typically liable during the marriage, though courts factor both parties’ debts into property division at divorce.
Co-signed debt is a separate category. If both spouses sign a loan or credit application, both are liable regardless of state or marital status. A divorce decree can assign responsibility for a joint mortgage or car loan to one spouse, but the decree binds the ex-spouses, not the creditor. Both names stay on the debt until it is refinanced or paid off.
How the Contract Ends
A marriage ends in one of three ways. Divorce legally dissolves the contract and requires a court to divide property, allocate debts, address child custody if applicable, and decide whether either spouse will pay support. Every state now offers some form of no-fault divorce, so neither spouse needs to prove wrongdoing; irreconcilable differences or an irretrievable breakdown is enough. Court filing fees for divorce petitions generally run from $50 to over $400, before attorney costs, mediation, or related expenses.
Annulment is different. Rather than ending a valid marriage, it declares that a legally valid marriage never existed. Grounds are narrow: fraud or misrepresentation about something central to the marriage, bigamy, marriage between close relatives, or one party lacking the mental capacity or legal age to consent. Most situations that make a marriage unhappy do not make it legally void.
Death terminates the marriage automatically and shifts matters to probate of the deceased spouse’s estate, distribution under the will or intestacy laws, and the survivor benefits available through Social Security and employer plans.