Alimony duration depends on the length of your marriage, the state you divorced in, and the type of alimony ordered

There is no single answer to how long alimony lasts. A court in one state might order payments for half the length of the marriage; another state has no formula at all. Some alimony ends on a specific date. Some ends when the person receiving it remarries or cohabits with a new partner. Some continues until death unless a judge changes the order. The duration depends on which state handled your divorce, what the judge decided, and whether either person later asks the court to modify the order.

The most common pattern is durational alimony — payments that last for a set number of years rather than indefinitely. But even "durational" varies widely. A 10-year marriage in one state might trigger 5 years of alimony; the same marriage in another state might trigger 10 years. A few states use formulas; most leave it to the judge's discretion.

Key Takeaways

  • Most states tie alimony duration to marriage length, but the formula differs by state — some use half the marriage length, others use a percentage, and some give judges complete discretion.
  • Permanent alimony (lasting until death or remarriage) is now rare and usually reserved for long marriages or situations where one person cannot work.
  • Alimony ends automatically in most states if the person receiving it remarries, and in many states if they cohabit with a new partner in a marriage-like relationship.
  • Either person can ask a court to change or end alimony if circumstances change significantly — job loss, serious illness, or a major change in income.
  • The original divorce order should state the end date or the conditions that trigger the end; if it does not, you may need to return to court to clarify.

How states calculate alimony duration

States fall into roughly three groups: those with a formula, those with guidelines, and those that leave it entirely to the judge.

Formula states use a mathematical rule. Florida, for example, ties durational alimony to marriage length: a marriage of less than 5 years typically triggers alimony for 20 to 30 percent of the marriage length; a marriage of 5 to 10 years triggers 30 to 50 percent; a marriage of 10 to 20 years triggers 50 to 100 percent. A marriage of 20 years or more can result in permanent alimony. Texas has no alimony formula at all — the judge decides whether alimony is warranted and, if so, for how long, up to a maximum of 10 years (or longer in specific circumstances). New York ties alimony duration to income level and marriage length, with different rules for temporary alimony (during the divorce) and post-divorce alimony.

Guideline states provide a framework but allow judges to deviate. These states often suggest that alimony last for one-third to one-half the marriage length for marriages under 20 years, and longer or indefinitely for longer marriages. The judge can order more or less based on factors like the age and health of both people, their earning capacity, and whether one person sacrificed education or career for the marriage.

Discretionary states give judges broad authority with no formula or guideline. The judge considers factors like marriage length, both people's income and earning potential, the standard of living during the marriage, and contributions to the marriage (including homemaking or child-rearing). Duration can range from a few years to permanent.

Permanent alimony versus durational alimony

Permanent alimony continues until the person receiving it dies, remarries, or the court changes the order. It is now uncommon and typically ordered only in long marriages (often 20 years or more) or when one person is unable to work due to age, illness, or disability. Even when ordered, it can be modified if circumstances change substantially — for example, if the person paying it loses their job or retires.

Durational alimony lasts for a specific period of time, after which it ends automatically. This is the most common form today. The duration is set in the divorce order and does not change unless a judge modifies it. If the order says alimony ends on December 31, 2030, it ends on that date regardless of either person's circumstances — unless one of them returns to court and convinces the judge that a change is warranted.

Some states use the term rehabilitative alimony, which is durational alimony intended to help the person receiving it become self-supporting — typically by funding education or job training. The duration is usually shorter than other forms of durational alimony and is tied to how long the education or training will take.

When alimony ends automatically

Alimony ends on the date specified in the divorce order, or when one of these events occurs:

  • The person receiving alimony dies.
  • The person paying alimony dies (though the estate may still owe arrears).
  • The person receiving alimony remarries.
  • The person receiving alimony cohabits with a new partner in a marriage-like relationship (in most states, though the definition of cohabitation varies).
  • The date specified in the order arrives.

The divorce order should spell out these conditions. If it does not, and a triggering event occurs, you may need to file paperwork with the court to formally end alimony. Do not straightforward stop paying or stop accepting payment — notify the other person and, if necessary, ask the court to confirm the end date in writing.

Modifying alimony duration

Either person can ask a court to change the duration of alimony if circumstances change substantially. A substantial change usually means something significant and not temporary — a permanent job loss, a serious illness, a major change in income, or retirement.

The person paying alimony might ask to reduce or end it if they lose their job, become disabled, or retire. The person receiving it might ask to extend it if they cannot find work or face unexpected medical expenses. The court will review the request and may modify the order, leave it unchanged, or make a different change.

The process varies by state. In most places, you file a motion to modify with the court that issued the original order, serve the other person, and attend a hearing. Some states allow modification requests only after a certain amount of time has passed since the original order (often 3 years). Others allow modification at any time if the change in circumstances is substantial enough.

Temporary alimony during divorce versus post-divorce alimony

Courts sometimes order temporary alimony (also called pendente lite alimony) while the divorce is ongoing. This is meant to help the lower-earning spouse pay bills and legal fees during the divorce process. Temporary alimony ends when the divorce is final, at which point the judge may order post-divorce alimony, end alimony entirely, or order a different amount.

Post-divorce alimony (also called permanent alimony or durational alimony, depending on the state) is what continues after the divorce is complete. The duration of post-divorce alimony is separate from the duration of temporary alimony. A person might receive temporary alimony for 18 months during the divorce and then post-divorce alimony for 5 years after the divorce is final.

What to do if your alimony order does not specify an end date

Some older divorce orders do not clearly state when alimony ends. If your order says "alimony shall be paid" without specifying a duration or end date, you have several options. You can ask the other person to agree in writing that alimony ends on a specific date or under specific conditions. If they will not agree, you can file a motion with the court asking for clarification or modification of the order.

If you are the person paying alimony and the order is unclear, do not stop paying without a court order. If you are receiving alimony and the order is unclear, do not assume it will continue indefinitely — ask for written clarification. In either case, returning to court to clarify the order protects both of you and creates a clear record of what was decided.

Frequently Asked Questions

Can alimony last forever?

Permanent alimony can last until death, remarriage, or a court order changes it, but it is now uncommon. Most states limit alimony to a set number of years based on marriage length. Even permanent alimony can be modified if circumstances change substantially.

Does alimony end if I get remarried?

In most states, yes — alimony ends automatically when the person receiving it remarries. Some states also end alimony if the person receiving it cohabits with a new partner in a marriage-like relationship, though the definition of cohabitation varies. Check your state's law or your divorce order to confirm.

What happens if the person paying alimony loses their job?

Job loss is usually considered a substantial change in circumstances that justifies asking the court to modify alimony. You would file a motion to modify, provide evidence of the job loss and your efforts to find new work, and ask the judge to reduce or temporarily suspend payments. The court may grant the request, deny it, or order a different change.

Can I extend alimony if I cannot find work?

You can ask the court to extend alimony if you face a substantial change in circumstances — such as a serious illness, disability, or inability to find work despite good-faith efforts. The court will review your request and may extend alimony, leave it unchanged, or order a different modification. Success depends on the judge and your state's law.

What if my ex dies — do I still owe or receive alimony?

If the person receiving alimony dies, alimony ends. If the person paying alimony dies, the obligation typically ends as well, though the estate may still owe any unpaid arrears (back payments). Some states have different rules, so check your state's law or consult the divorce order.