The legal disadvantages of marriage are the ways becoming a spouse limits your financial independence, binds you to another person’s debts and tax problems, restricts your control over retirement and estate decisions, and in some cases shrinks or ends government benefits you were receiving on your own. Some of these consequences land the day you sign the license. Others only appear years later, in a divorce court, a probate hearing, or a letter from the IRS. Most are set by federal or state law and cannot be waived with a handshake.
You Become Liable for Debts You Didn’t Sign For
Once you marry, creditors can reach shared assets to collect on debts your spouse took on alone. In community property states, the marital estate is generally liable for obligations either spouse incurs during the marriage, even if only one spouse signed the credit agreement.1Federal Deposit Insurance Corporation. Guidance on the Spousal Signature Provisions of Regulation B A creditor can pursue joint bank accounts, shared real estate, or other marital property to satisfy a credit card balance or personal loan your spouse opened without telling you.
Outside community property states, the doctrine of necessaries creates a separate path to spousal liability. Under this doctrine, recognized in most states, you can be held responsible for your spouse’s essential living expenses like medical care, food, and housing. Hospitals and medical providers use the rule aggressively, and a surviving spouse sometimes discovers the liability only after the other spouse dies with unpaid bills. Marriage makes you a backstop for your spouse’s basic needs, whether you agreed to the spending or not.
These obligations don’t automatically vanish in divorce. A decree can assign responsibility for a particular debt to one spouse, but that agreement only binds the two of you. The creditor, who was not a party to your divorce, can still pursue whichever spouse is legally liable under the original credit agreement or state law.
Joint Tax Returns Make You Liable for Your Spouse’s Errors
Filing jointly means more than sharing a form. Under federal law, both spouses are jointly and severally liable for the entire tax due on a joint return, including interest and penalties.2Office of the Law Revision Counsel. 26 USC 6013 – Joint Returns of Income Tax by Husband and Wife The IRS can collect the full balance from either spouse, regardless of who earned the income or who made the error. If your spouse underreported income by $50,000 on a return you both signed, the IRS can come after you for all of it.
This liability survives divorce. A decree saying your ex is responsible for prior tax debts means nothing to the IRS. The agency will pursue whichever former spouse is easier to collect from, leaving your only recourse to seek reimbursement from your ex back in family court.
Innocent spouse relief exists as a safety valve, but qualifying is harder than most people expect. You must show that the understatement was due to your spouse’s erroneous reporting, that you had no knowledge of the errors when you signed, and that holding you liable would be unfair.3Internal Revenue Service. Innocent Spouse Relief If a reasonable person in your situation would have known about the discrepancy, you are likely out of luck. The request must be filed within two years of the IRS’s first collection attempt using Form 8857.4Internal Revenue Service. Instructions for Form 8857 Victims of domestic abuse get a broader exception and may qualify even if they knew about the errors, provided the abuse prevented them from challenging the return.
The Marriage Tax Penalty for Dual High Earners
When two high earners marry, their combined income can push them into a higher marginal bracket than either faced alone. The upper federal brackets for married couples filing jointly are not double the single-filer thresholds. For 2026, a single filer does not hit the 37% bracket until taxable income exceeds $640,600, but a married couple filing jointly reaches it at $768,700.5Internal Revenue Service. IRS Releases Tax Inflation Adjustments for Tax Year 2026 A true doubling would set the joint threshold at $1,281,200. The gap is where the marriage penalty lives, and it bites hardest when both spouses earn similar amounts.
The state and local tax deduction compounds the problem. For 2026, the SALT deduction cap was raised to $40,000 for filers with modified adjusted gross income below $500,000. The $40,000 cap applies per return, not per person. Two unmarried individuals could each claim up to $40,000 for a combined $80,000, while a married couple filing jointly is limited to a single $40,000 deduction. In high-tax states, that difference alone can cost thousands.
You Lose Control Over Retirement Beneficiary Choices
Marriage locks your spouse into your retirement plan. Under federal law, most pension plans and many employer-sponsored retirement plans must pay benefits to married participants as a qualified joint and survivor annuity, meaning your spouse automatically receives at least half of your benefit after you die.6Office of the Law Revision Counsel. 29 USC 1055 – Requirement of Joint and Survivor Annuity and Preretirement Survivor Annuity You cannot waive this default or name a different beneficiary without your spouse’s written consent, witnessed by a plan representative or notary.7Internal Revenue Service. Retirement Topics – Qualified Joint and Survivor Annuity
If you want to leave your 401(k) to a child from a previous relationship, a sibling, or anyone else, your current spouse has to sign off. A spouse who refuses to consent effectively holds veto power over your beneficiary designation. The requirement applies even if you are separated but not yet divorced. Only a qualified domestic relations order issued during divorce proceedings can override the spousal consent rules.
You Can’t Fully Disinherit a Spouse
Marriage also restricts your freedom to decide who inherits when you die. Nearly every state outside the community property system gives a surviving spouse the right to claim an elective share of the deceased spouse’s estate, regardless of what the will says. This share is traditionally one-third of the estate, though some states set it higher.
You cannot leave your entire estate to your children, a charity, or anyone else if your spouse objects. The surviving spouse files a claim with the probate court and receives the statutory share. Transfers made to trusts or other vehicles before death may be clawed back into the estate calculation, depending on state law, which limits the effectiveness of common workarounds. The only reliable way to eliminate the elective share is through a prenuptial or postnuptial agreement in which both spouses waive the right after full financial disclosure.
Divorce Divides What You Built Together
Divorce forces a split of what you accumulated during the marriage, and the rules can be unforgiving. Roughly nine states follow community property rules, where income, retirement contributions, and property acquired during the marriage are treated as equally owned by both spouses regardless of who earned the money or whose name is on the account. The remaining states use equitable distribution, which divides property based on what a judge considers fair rather than a strict 50/50 split. Equitable does not mean equal, and the outcome depends heavily on judicial discretion.
Property you owned before the marriage is generally treated as separate, but that protection erodes through commingling. If you deposit premarital savings into a joint account, use separate funds to pay the mortgage on a shared home, or add your spouse’s name to a deed, most states presume you intended to make a gift to the marriage. The commingled assets lose their separate character and become divisible marital property. Rebutting the presumption typically requires clear and convincing evidence along with detailed tracing of the original source of every dollar. Appreciation driven by marital funds or effort, and intellectual property created during the marriage, can also be pulled into the divisible pool.
Then there is alimony. Dividing assets is a one-time event; spousal support can stretch on for years. Courts award it to prevent a sudden financial cliff for a lower-earning spouse, and the obligation falls on the higher earner whether the divorce was their idea or not. Duration typically scales with the length of the marriage. For marriages under ten years, courts often set support at roughly half the marriage’s duration. For longer marriages, there may be no preset end date, and support can continue until the recipient remarries, the paying spouse dies, or a court modifies the order. Judges weigh each spouse’s earning capacity, age, health, and the standard of living established during the marriage. A spouse who left the workforce for years to raise children will generally receive a longer support period.
Formulas vary enormously by state. Some have adopted guidelines; others leave the calculation almost entirely to judicial discretion. Failure to pay triggers wage garnishment, asset seizure, and contempt proceedings that can result in jail time.
Marriage Can Cut or End Needs-Based Benefits
For anyone receiving needs-based government assistance, marriage can mean an immediate reduction or total loss of benefits. The damage is sharpest for Supplemental Security Income recipients. In 2026, the maximum federal SSI benefit for an individual is $994 per month. For a married couple where both spouses are eligible, the combined benefit is $1,491, not the $1,988 two individuals would receive separately.8Social Security Administration. SSI Federal Payment Amounts for 2026 Marriage costs that couple nearly $500 per month, about $6,000 per year.
When an SSI recipient marries someone who does not receive SSI, the situation can be worse. The Social Security Administration deems a portion of the non-recipient spouse’s income and resources to the SSI recipient, treating the spouse’s earnings as available to meet the recipient’s basic needs.9Social Security Administration. 20 CFR 416.1163 – How We Deem Income to You From Your Ineligible Spouse Even a modest spousal income can wipe out the SSI benefit entirely.
Resource limits compound the problem. An individual on SSI cannot have more than $2,000 in countable resources; a married couple is capped at $3,000.10Social Security Administration. 2026 Cost-of-Living Adjustment (COLA) Fact Sheet Two unmarried individuals would have a combined capacity of $4,000. Marriage cuts that by $1,000.
The ripple effects reach healthcare. In many states, SSI eligibility automatically qualifies a person for Medicaid, so losing SSI can mean losing coverage. Even outside the SSI pathway, Medicaid eligibility in expansion states is based on household income below 138% of the federal poverty level.11HealthCare.gov. Medicaid Expansion and What It Means for You For a single person in 2026, that threshold is roughly $22,024, based on the federal poverty guideline of $15,960.12U.S. Department of Health and Human Services. 2026 Poverty Guidelines When two people marry, the household size becomes two, the poverty guideline rises to $21,640, and the 138% threshold becomes approximately $29,863. A couple earning $30,000 combined, which would easily qualify each partner individually, could be disqualified as a household.