How is alimony determined? A plain-English breakdown

Last updated 2026-07-09

What factors do courts actually use to decide alimony?

Every state hands the judge a list of factors to weigh before ordering spousal support. The lists run different lengths, but the same core items show up almost everywhere. The Uniform Marriage and Divorce Act, which shaped most state statutes, tells courts to look at the financial resources of the spouse asking for support, the time needed to acquire education or training, the standard of living during the marriage, how long the marriage lasted, the age and physical condition of both spouses, and whether the paying spouse can meet their own needs while paying ^[1].

Two factors dominate the rest: the income gap between the spouses and the length of the marriage. A two-year marriage between two similarly paid professionals almost never produces alimony. A 22-year marriage where one spouse left a career to raise kids almost always does.

Here is how the most commonly weighted factors rank in real case outcomes, based on appellate review patterns and family law scholarship:

Factor	Weight in most courts
Income disparity between spouses	Very high
Length of marriage	Very high
Standard of living during marriage	High
Ability of recipient to become self-supporting	High
Age and health of both spouses	Moderate-high
Contributions as homemaker or caregiver	Moderate
Marital fault (in fault states)	Low to moderate
Existing property settlement	Moderate

Fault, meaning adultery or abuse, still moves the calculation in about 30 states, though its weight has shrunk in most of them over the last two decades ^[2]. In no-fault states like California, it carries no legal effect on support at all.

Want the full picture of how spousal support works before you get into the math? The alimony overview is a good place to start.

Is there a formula for calculating alimony?

A few states use a formula. Most don't. That's the honest answer.

California uses a guideline formula for temporary support orders: roughly 40% of the higher earner's net monthly income minus 50% of the lower earner's net monthly income ^[3]. New York courts often reference a formula of 30% of the payor's income minus 20% of the recipient's income, capped at 40% of combined income, for cases below a statutory threshold ^[4]. Texas has no statutory formula and leaves amounts almost entirely to the judge.

Even where formulas exist, they usually apply only to temporary support while the divorce is pending. Long-term and permanent support orders almost always turn on the full factor analysis. The formula gives a starting number. The judge adjusts it.

The American Academy of Matrimonial Lawyers has proposed a model formula: the difference between 30% of the payor's gross income and 20% of the recipient's gross income, capped so the recipient doesn't end up with more than 40% of the couple's combined gross income ^[5]. A handful of jurisdictions borrowed from it, but it isn't law anywhere on its own.

Doing the math yourself? Use actual gross monthly income, not take-home pay, because courts almost always start from gross. Write down both spouses' numbers before you touch any formula.

How does length of marriage affect the alimony amount and duration?

Marriage length is the single most reliable predictor of whether alimony gets awarded at all, and for how long.

Short marriages, roughly under 7 years in most states, rarely produce alimony unless one spouse has a serious health condition or the income gap is extreme. Medium marriages of 7 to 17 years usually produce rehabilitative alimony, meaning support for a fixed period to let the lower earner get back on their feet. Long marriages, generally over 20 years, are where "permanent" or "long-term" alimony still shows up.

Many states tie duration straight to marriage length by statute. Florida sets presumptive categories: marriages under 7 years are "short-term," 7 to 17 years are "moderate-term," and over 17 years are "long-term." The 2023 Florida alimony reform law (HB 1409) ended permanent alimony entirely and made rehabilitative and durational alimony the standard, with maximum duration caps tied to those categories ^[6].

One rough rule holds across many jurisdictions: support runs about half the length of the marriage for moderate-term cases. So a 14-year marriage might produce 7 years of alimony. That's a guideline, not a statute, but family law attorneys treat it as a starting reference in negotiation.

What is the difference between temporary and permanent alimony?

Temporary alimony (also called pendente lite support) is ordered while the divorce is in process. It ends automatically when the divorce is final. Its job is to hold the financial status quo in place, not to say anything lasting about the marriage.

After the divorce is final, courts can order several kinds of ongoing support.

"Rehabilitative alimony" is the most common type in modern courts. It has a defined end date and assumes the recipient will use the time to become self-supporting through education, job training, or a return to work.

"Reimbursement alimony" pays back one spouse for supporting the other through school or a career jump. You see it when one spouse put a partner through medical school and the couple divorced shortly after.

"Permanent alimony" is awarded less and less, reserved mostly for long marriages where one spouse is elderly, disabled, or otherwise can't realistically become self-supporting. Florida ended it in 2023. Massachusetts still has it ^[7]. New Jersey technically keeps it, but courts have moved away from it since the 2014 reform law.

"Lump-sum alimony" trades periodic payments for a single payment, usually folded into a property settlement. It can't be modified later, which makes it clean but rigid.

How much is alimony typically? What are the real numbers?

Nobody has clean national data on this. The Census Bureau stopped tracking alimony receipt as its own category, and divorce records aren't compiled in one place. What we have are state surveys and attorney practice reports.

The American Academy of Matrimonial Lawyers' member surveys put median annual alimony awards in contested cases between $15,000 and $30,000 a year, with duration most often in the 3-to-10-year range for marriages of 10 to 20 years ^[5]. High-asset cases can run six figures a year. Very short marriages with small income gaps often produce zero.

A few concrete reference points from federal data:

• The IRS reported about 243,000 tax returns claiming alimony paid for tax year 2018, the last year alimony was deductible under the old law, with a total of roughly $9.5 billion. That implies an average around $39,000 a year among those who paid ^[8]. The figure skews high, because only people who paid meaningful amounts bother to deduct it.
• In California, the guideline formula for temporary support in a case where one spouse earns $8,000/month net and the other earns $2,500/month net produces a starting figure around $(0.40 x 8000) - (0.50 x 2500) = $3,200 - $1,250 = $1,950/month ^[3].

The honest answer: the amount swings enormously by state, by judge, and by the facts. The income gap matters more than any other single variable.

Does the reason for the divorce affect alimony?

It depends entirely on the state.

In fault-based states, misconduct, particularly adultery, abandonment, or cruelty, can push the alimony award in either direction. A cheating spouse may receive less, or nothing, in Georgia, North Carolina, Virginia, and South Carolina, where adultery by the potential recipient can legally bar an award ^[2]. In those same states, if the paying spouse committed adultery, the judge may raise the award.

In no-fault states (California, Wisconsin, Oregon, and others), the conduct that ended the marriage has no bearing on support. The court looks only at financial need and ability to pay.

Most states sit in the middle: they're technically no-fault for getting the divorce itself, but still let fault count as one factor among many in setting support. New York, for example, requires that fault be "egregious" before it can affect alimony.

If you're in a fault-relevant state and misconduct is part of your situation, that's one place where talking to a divorce attorney before you finalize any settlement agreement is worth the money.

Can spouses agree on alimony without a judge deciding?

Yes, and this is how most uncontested divorces handle it.

When both spouses negotiate and agree on an amount, duration, and terms, they put those terms into a marital settlement agreement (also called a separation agreement or property settlement agreement, depending on the state). The judge reviews it and, as long as it isn't facially unconscionable, approves it. The judge does not recalculate from scratch.

This matters a lot in practice. Agreed alimony is faster, cheaper, and gives both people more control than a litigated award. You can set terms a judge might not order: a step-down schedule where payments drop over time, a lump-sum buyout, or a short trial period.

The agreement still has to be in writing, signed by both parties, and meet your state's requirements for a valid marital settlement agreement. Many states require the agreement to be incorporated into the final divorce decree to be enforceable as a court order rather than just a private contract.

If you and your spouse have already agreed on support terms and just need properly drafted paperwork, DivorceClear's $149 document packet generates the full settlement agreement and every filing form for your state, which costs a lot less than paying an attorney to draft the same documents.

For a walkthrough of what the full paperwork looks like, the divorce papers guide covers what each document does.

What income counts when calculating alimony?

Courts count gross income from every source, well past the W-2. Wages, salary, bonuses, commissions, investment income, rental income, Social Security, pension distributions, trust distributions, and business income all count. If a spouse is voluntarily underemployed, meaning they could earn more but choose not to, courts in most states can impute income, treating them as if they earn their demonstrated earning capacity rather than their actual current pay ^[1].

Imputed income is one of the most litigated issues in alimony cases. A spouse who quit a $120,000-a-year job right before filing cannot simply claim their income is zero. Courts look at work history, education, health, and the local job market to figure out what someone could realistically earn.

Self-employment income gets picked apart, because business expenses can hide actual available cash. Courts often add back depreciation, personal expenses run through the business, and other non-cash deductions.

After the Tax Cuts and Jobs Act of 2017, alimony paid under divorce agreements finalized after December 31, 2018, is no longer deductible for the payer and no longer taxable to the recipient ^[8]. That changed the negotiating math. A $2,000/month payment now costs the payer the full $2,000 after tax, not the smaller after-deduction amount. Agreements from before January 1, 2019, keep the old tax treatment unless the parties affirmatively modify them and elect the new rules.

When does alimony end or get modified?

Alimony ends automatically on the date set in the divorce order or agreement. Beyond that expiration, most states allow termination on three common events:

1. Death of either party. Almost all alimony awards end at the payer's or recipient's death, unless the agreement explicitly makes the obligation a charge against the estate.

2. Remarriage of the recipient. In most states, the recipient's remarriage terminates alimony by operation of law. Some agreements spell this out; some states require a motion to terminate.

3. Cohabitation by the recipient. About 20 states have statutes allowing modification or termination when the recipient lives with a romantic partner, on the theory that shared expenses cut financial need. The definition of "cohabitation" varies and gets litigated constantly.

Modification, as opposed to termination, requires showing a substantial change in circumstances. Job loss, a big raise, disability, retirement, and the recipient's increased income all qualify in most jurisdictions. The party seeking the change files a motion with the court that issued the original order.

Lump-sum alimony and alimony expressly labeled "non-modifiable" in the settlement agreement generally can't be changed after the fact. That's the tradeoff for the certainty of a lump sum.

For the paying spouse, early retirement is a gray area. Courts in many states, including New Jersey and Massachusetts, look at whether the retirement was in good faith and at normal retirement age before allowing a downward modification ^[7].

How is alimony different from child support?

They're separate legal obligations, calculated separately, under completely different rules.

Child support is set by formula in every state. The formulas are published, the inputs are defined (income, parenting time, certain expenses), and the result is close to deterministic. Courts have very little room to stray far from the guideline amount. You can run the math yourself with a child support calculator before you ever set foot in a courtroom.

Alimony has no national formula, as covered above. It involves far more judicial discretion, far more negotiation, and far less predictability.

There's a tax difference too. Child support was never touched by the 2017 tax law the way alimony was. Child support was never deductible and never taxable to the recipient. Alimony's tax treatment flipped for agreements after 2018.

The two interact. When both are on the table in the same case, a larger property settlement might get traded against lower alimony, and the reverse. The total financial picture matters, not any single number in isolation.

How do you actually get alimony awarded in your divorce?

There are two paths: agreement or court order.

If your divorce is uncontested and you and your spouse agree on support, you document it in your marital settlement agreement, file it with the rest of your divorce papers, and the judge approves it at your hearing or on review. No separate alimony hearing needed.

If the divorce is contested, the spouse seeking alimony files a motion for temporary support at the start of the case to get money coming in while things proceed. The judge holds a hearing, reviews financial affidavits from both sides, and sets a temporary amount. At the final trial, the judge takes full evidence and sets the permanent award.

In contested cases, both sides typically file a financial disclosure document, sometimes called a financial affidavit or statement of net worth, listing all income, expenses, assets, and debts. These documents carry real weight. Understating income or overstating expenses is perjury, and forensic accountants sometimes get hired in high-asset cases to check the numbers.

For people handling their own uncontested divorce, the steps are simple: agree on terms, document them in a settlement agreement, make sure the agreement meets your state's formal requirements (witness, notarization, specific statutory language), and file it with the petition. Your state court's self-help center can tell you exactly what the agreement must include to be enforceable. California's self-help page is a good model of what these resources look like ^[9].

Curious how common all this is? The divorce rate in America piece gives context on outcomes across different demographics.

What are the biggest mistakes people make with alimony in a DIY divorce?

Agreeing to non-modifiable terms without thinking through the future is probably the most costly mistake. Agree that alimony is "permanent and non-modifiable," then lose your job five years later, and you may have no legal recourse. Build in review triggers or explicit modification rights for major life changes.

Ignoring the tax consequences is second. Post-2018 alimony is not deductible. If you're negotiating a number based on the after-tax cost, use current law, not the old deduction rules.

Skipping a clear termination clause is another common one. Your agreement should state exactly when alimony ends: a specific date, remarriage, cohabitation, death, or some combination. "Until further order of the court" is vague and invites future litigation.

For the recipient: accepting too short a duration because you want the divorce over. Rehabilitative alimony has to be long enough to actually accomplish the rehabilitation. If you need two years of nursing school plus time to build a client base, three years of support isn't enough, even if it sounds generous today.

For the payer: agreeing to an amount tied to your current income without language that lets the amount adjust or allows modification if your income drops. Life changes. Build in the flexibility.

If either side has significant income, a divorce lawyer review of the settlement agreement before signing can head off expensive mistakes, even if you're handling the rest of the divorce yourself.

Frequently asked questions

How long do you have to be married to get alimony?

There's no universal minimum, but marriages under 3 to 5 years rarely produce alimony unless one spouse has a disability or the income gap is severe. Most states start taking alimony requests seriously around the 7-year mark, and long-term awards become common after 10 to 15 years. Check your state's statutes, since some, like Florida, define short, moderate, and long-term marriages by law.

Can a husband get alimony from a wife?

Yes. Alimony is gender-neutral in all 50 states following the U.S. Supreme Court's 1979 decision in Orr v. Orr, which struck down male-only alimony statutes. Whether a husband receives support depends on the same income-gap and marriage-length factors as any other case. Men are a minority of alimony recipients, but the legal standard is identical.

What is the average alimony payment per month?

Nationwide averages are unreliable, because divorce records aren't compiled in one place. IRS data from 2018 showed about $9.5 billion in total alimony paid across roughly 243,000 returns, implying an average around $3,250 per month among those who reported it. That figure skews high toward contested, higher-income cases. Agreed amounts in uncontested divorces are often lower and reflect what the couple can actually afford.

Does cheating affect alimony?

Only in some states. In Georgia, North Carolina, Virginia, and South Carolina, a spouse who commits adultery may be barred from receiving alimony entirely. In no-fault states like California, fault is irrelevant. Most states fall in between, allowing fault as one of several factors but not a decisive one unless the conduct was egregious. Check your state's specific statute.

Is alimony taxable income?

For divorce agreements finalized after December 31, 2018, alimony is not taxable to the recipient and not deductible for the payer under the Tax Cuts and Jobs Act of 2017. For agreements finalized before that date, the old rules apply: it's deductible for the payer and taxable for the recipient, unless the parties modify the agreement and elect the new treatment.

Can alimony be waived?

Yes. Either spouse can waive their right to alimony in a marital settlement agreement. Courts generally enforce a waiver as long as both parties had access to financial information, the waiver was voluntary, and the result isn't unconscionable. Some states require specific language for a valid waiver. A prenuptial agreement can also waive alimony before marriage in most states.

How is alimony determined if one spouse doesn't work?

A non-working spouse who is capable of working may have income imputed to them. The court looks at their education, work history, health, and the local job market to estimate what they could reasonably earn, then treats them as if they earn that amount. A non-working spouse who genuinely can't work due to age or disability would typically see a larger award reflecting their actual inability to become self-supporting.

Can alimony be modified after the divorce is final?

Usually yes, unless the agreement specifically says it's non-modifiable. Most states let either party return to court and request a modification based on a substantial change in circumstances, such as a major income change, disability, or retirement. The party seeking modification bears the burden of proving the change. Lump-sum alimony is almost never modifiable once paid.

What happens to alimony if the recipient remarries?

In most states, alimony terminates automatically when the recipient remarries, either by statute or by standard agreement language. A few states require the paying spouse to file a motion to terminate rather than stopping payments on their own. The payer should more than stop paying without confirming the termination procedure in their state, because back payments can pile up as arrears.

How do I calculate alimony for my own state?

Start at your state court's self-help center or family law section, usually reachable through the state judiciary website. California, New York, and a handful of others publish guideline formulas. For states without formulas, review the statutory factor list and write down both spouses' gross monthly income, expenses, assets, and the marriage duration. Many family law attorneys offer a flat-fee consultation just to give an alimony estimate before you negotiate.

Does alimony end when the payer retires?

Not automatically, but retirement is the most common basis for a modification motion. Courts look at whether the retirement was at a normal retirement age, was made in good faith, and actually reduces income. A healthy 50-year-old taking early retirement to cut off alimony is unlikely to succeed. A 67-year-old retiring from a 30-year career has a strong case for downward modification.

How is alimony handled in an uncontested divorce?

The spouses negotiate and agree on amount, duration, and terms, then document everything in a marital settlement agreement. That agreement gets filed with the divorce papers and incorporated into the final decree. The judge reviews but doesn't recalculate. This is faster and cheaper than litigation, and it gives both parties control over terms a judge might not order, like a lump-sum payment or a step-down schedule.

What is the difference between alimony and spousal support?

They're the same thing, just different terms. "Alimony" is the older legal term still used in many states and in federal tax law. "Spousal support" and "spousal maintenance" are more modern terms some states switched to, partly to reflect that the obligation is gender-neutral. Your state's statute will use one term consistently. The concept and calculation are identical regardless of the label.

Sources

1. Uniform Law Commission, Uniform Marriage and Divorce Act (UMDA) Section 308: The UMDA lists financial resources, time for education, standard of living, duration of marriage, age and health, and ability of the payor to meet their own needs as the core alimony factors courts must consider.
2. Cornell Law School Legal Information Institute, Alimony Overview: Marital fault still affects alimony calculations in approximately 30 states, though its weight has diminished; adultery can bar alimony in states like Georgia and North Carolina.
3. California Courts Self-Help, Spousal Support: California uses a guideline formula for temporary spousal support of roughly 40% of the higher earner's net monthly income minus 50% of the lower earner's net monthly income.
4. New York Courts, Domestic Relations Law Section 236B(6): New York's post-divorce spousal maintenance formula is 30% of the payor's income minus 20% of the recipient's income, capped so the recipient does not exceed 40% of combined income, for incomes below a statutory threshold.
5. American Academy of Matrimonial Lawyers, Considerations in Setting Alimony, 2007 Model Formula: The AAML proposed that alimony be the difference between 30% of the payor's gross income and 20% of the recipient's gross income, with the total capped at 40% of combined gross income; median awards in contested cases fall between $15,000 and $30,000 annually.
6. Florida Legislature, HB 1409 (2023), Section 61.08 Florida Statutes: Florida's 2023 alimony reform law eliminated permanent alimony and established presumptive categories based on marriage length: under 7 years is short-term, 7-17 years is moderate-term, over 17 years is long-term.
7. Massachusetts General Laws, Chapter 208 Section 49, Alimony Reform Act of 2011: Massachusetts retains long-term and permanent alimony under the Alimony Reform Act; retirement at normal retirement age is a recognized basis for modification, but courts assess whether retirement is in good faith.
8. IRS Statistics of Income, Individual Income Tax Returns 2018: Approximately 243,000 tax returns reported alimony paid in tax year 2018 totaling roughly $9.5 billion; the Tax Cuts and Jobs Act of 2017 eliminated the alimony deduction for divorce agreements finalized after December 31, 2018.
9. California Courts Self-Help Center: State court self-help centers provide guidance on what marital settlement agreements must include to be valid and enforceable, including required statutory language.
10. U.S. Supreme Court, Orr v. Orr, 440 U.S. 268 (1979): The Supreme Court struck down Alabama's male-only alimony statute in 1979, establishing that alimony laws must be gender-neutral under the Equal Protection Clause.
11. Internal Revenue Service, Publication 504, Divorced or Separated Individuals: For divorce or separation agreements executed after December 31, 2018, alimony is not deductible by the payer and not includable in the recipient's gross income under the Tax Cuts and Jobs Act.