Child support has a formula in every state. Spousal support does not.
That single difference explains why two people with nearly identical finances can walk out of court in different states owing wildly different amounts — or nothing at all.
Updated: 2026-08-06
Quick answer: Spousal support, also called alimony or spousal maintenance, is money one former spouse pays the other after separation to address an income gap the marriage created. Unlike child support, there is no national formula: a handful of states apply a guideline calculation, most weigh a list of statutory factors, and a few impose hard dollar caps. Duration is usually tied to the length of the marriage, and for any divorce finalized after December 31, 2018, alimony is neither tax-deductible for the payer nor taxable income for the recipient.
Legal disclaimer: This article is general information, not legal advice. Spousal support law varies enormously between states and outcomes depend on financial facts a general article cannot know. For decisions about your own case, consult a family-law attorney licensed in your state.
Table of Contents
- What is spousal support?
- How is spousal support different from child support?
- What types of alimony can a court award?
- How is alimony actually calculated?
- How long does spousal support last?
- Is alimony taxable?
- Can spousal support be changed or ended?
- What actually persuades a judge?
- Frequently Asked Questions
What is spousal support?
Spousal support is a court-ordered payment from one former spouse to the other, designed to address a financial gap the marriage itself produced.
The word people use depends on where they live. Alimony is the traditional term and still the statutory word in Florida. Spousal support is California’s term. Spousal maintenance is what Texas and Illinois call it. The labels are interchangeable in ordinary conversation, but inside a courtroom they carry a state’s specific rules.
The purpose is narrower than most people assume. Alimony is not a penalty for ending a marriage, and it is not a reward for staying in one. Courts award it where one spouse’s earning capacity was suppressed by decisions the couple made together — one person left the workforce to raise children, or moved three times for the other’s career, or funded a partner’s degree while postponing their own.
That framing matters because it predicts what evidence works. A spouse who can show a concrete, marriage-caused earning gap has a case. A spouse who is simply the lower earner, in a short marriage, with comparable credentials, usually does not.
How is spousal support different from child support?
They are frequently confused and they behave almost oppositely.
| Spousal support | Child support | |
|---|---|---|
| Who benefits | The lower-earning former spouse | The child |
| Calculation | Formula in some states, open-ended factors in most | A state guideline formula in all 50 states |
| Predictability | Low — outcomes vary widely on similar facts | High — the number is largely arithmetic |
| Tax treatment (post-2018 orders) | Not deductible, not taxable income | Not deductible, not taxable income |
| Ends on the recipient’s remarriage | Generally yes | No |
| Ends when the children grow up | No — unrelated | Generally yes |
| Can be waived by agreement | Often yes | No — the right belongs to the child |
The last row is the one that surprises people most. Spouses can bargain alimony away entirely in a settlement or prenuptial agreement. They cannot bargain away child support, because that money is legally the child’s, not the parent’s. Our guide to how child support is calculated covers that side in detail.
What types of alimony can a court award?
Most states recognize several categories, and which one a judge picks does more work than the dollar figure.
| Type | What it is for | How long it runs |
|---|---|---|
| Temporary (pendente lite) | Keeping both households afloat while the divorce is pending | Until the final judgment |
| Bridge-the-gap | Identifiable short-term transition costs — a deposit, a move, a certification | Short-term by design |
| Rehabilitative | Funding specific education or training toward self-sufficiency | Tied to a written plan; Florida caps it at 5 years |
| Durational | A set term of support after a marriage that does not justify indefinite payments | A capped percentage of the marriage length |
| Permanent | Indefinite support, historically for long marriages | Abolished in Florida in 2023; rare and narrowing elsewhere |
| Reimbursement | Repaying a spouse who financed the other’s degree or license | A fixed sum, not ongoing support |
Rehabilitative alimony is the category worth understanding first, because it is the one most often awarded and the one most often lost. Under Fla. Stat. § 61.08, it requires “a specific and defined rehabilitative plan” — not an intention to retrain, but a plan with a program, a cost and a timeline. Requests without one get denied routinely.
How is alimony actually calculated?
Here is the honest answer: it depends on your state to a degree that has no parallel in child support.
Four states illustrate four genuinely different systems. These are not variations on a theme — they are separate machines.
| State | Model | The actual rule |
|---|---|---|
| Illinois | Guideline formula | 33⅓% of the payor’s net income minus 25% of the payee’s net income, and the result added to the payee’s net income may not exceed 40% of the parties’ combined net income. The guideline applies where combined gross income is under $500,000. |
| Texas | Hard caps plus strict eligibility | Monthly payments may not exceed the lesser of $5,000 or 20% of the payor’s average monthly gross income (Tex. Fam. Code § 8.055). The spouse must first clear a narrow eligibility gate under § 8.051. |
| Florida | Capped durational | Permanent alimony is abolished. Durational alimony is capped at the recipient’s reasonable need or 35% of the difference between the parties’ net incomes, whichever is less, and cannot be awarded after a marriage of under 3 years. |
| California | Open-ended factors | No formula for long-term support. Cal. Fam. Code § 4320 lists 14 factors the judge must weigh, including the marital standard of living, each party’s earning capacity, and any documented history of domestic violence. |
Two consequences follow from that table.
In a formula state, the negotiation is about inputs. If Illinois law says 33⅓% minus 25%, the fight is over what counts as net income — bonuses, self-employment write-offs, an underemployed spouse’s imputed earning capacity. The arithmetic is settled; the inputs are not.
In a factor state, the negotiation is about story. California’s § 4320 gives a judge fourteen considerations and no equation. The spouse who documents the marital standard of living, the career interrupted, and the specific plan to become self-supporting is the one who moves the number.
Texas deserves a separate warning. Its eligibility gate is the strictest of the four: a spouse must show they lack sufficient property to meet minimum reasonable needs and fall into one of a few narrow categories — a marriage of 10 years or longer combined with an inability to earn enough, an incapacitating disability, custody of a child requiring substantial care, or a family violence conviction within the statutory window. Many Texas spouses who would receive substantial support in Illinois receive nothing.
How long does spousal support last?
Duration is where the length of the marriage does its heaviest work, and the mechanics differ by state.
Florida ties duration to explicit percentage caps. A marriage under 10 years is short-term, 10 to 20 years is moderate-term, and 20 years or longer is long-term. Durational alimony may not exceed 50% of the length of a short-term marriage, 60% of a moderate-term marriage, or 75% of a long-term marriage. A 12-year marriage therefore carries a ceiling of roughly 7.2 years.
Texas uses fixed ceilings instead of percentages: five years for marriages under 10 years (and for the family-violence route), five years for 10 to 20 years, seven years for 20 to 30 years, and ten years for marriages of 30 years or more.
Illinois multiplies the marriage length by a rising factor — roughly 20% for marriages under five years, climbing through 40%, 60% and 80% as the brackets increase. At 20 years or more, a court may order support for a period equal to the marriage or for an indefinite term.
California sets no cap by statute, but § 4320 directs courts toward the goal that the supported spouse become self-supporting “within a reasonable period of time,” which the statute says “generally shall be one-half the length of the marriage.” Marriages of 10 years or longer are treated differently, and courts commonly retain jurisdiction rather than setting an end date.
The pattern across all four: short marriages produce short awards, and the 10-year mark is a genuine legal threshold in most states, not folklore.
Is alimony taxable?
For any divorce finalized after December 31, 2018 — no, in both directions. This is the single most misunderstood point in the entire subject, because the rule reversed.
The Tax Cuts and Jobs Act changed the treatment for agreements executed after that date. Alimony is not deductible by the person paying it and not includable in the income of the person receiving it. The IRS sets this out in Publication 504 and in its alimony tax topic.
Three practical consequences:
- Older orders still follow the old rules. A divorce finalized on or before December 31, 2018 keeps the deduction for the payer and the income inclusion for the recipient, unless a later modification expressly adopts the new treatment.
- Modifying an old order can forfeit the deduction. If a post-2018 modification of a pre-2019 agreement expressly states the new rules apply, the deduction is gone. That is a decision to make deliberately, not accidentally.
- The change moved real money. Under the old rules, a high earner’s payment was partly subsidized by the deduction, which made larger awards easier to negotiate. That subsidy no longer exists, and settlement numbers have adjusted downward in response.
Anyone comparing their situation to a friend’s divorce from 2015 is comparing against a different tax regime. Check the date on the decree before drawing any conclusion.
Can spousal support be changed or ended?
Usually yes, unless the parties agreed to make it non-modifiable. Three events do most of the work.
Remarriage. In most states, the recipient’s remarriage terminates alimony automatically. This is one of the few near-universal rules in the subject.
Cohabitation or a supportive relationship. Living with a new partner can reduce or end support even without marriage. Florida’s rules here were rewritten in 2023: a court must reduce or terminate alimony on specific written findings that a supportive relationship exists, with the payer bearing the initial burden of proof and the burden then shifting to the recipient.
Retirement. Florida’s 2023 reform also created a defined route: a payer who reaches normal retirement age as defined by the Social Security Administration, or the customary retirement age for their profession, may seek reduction or termination, and may apply as early as six months before a planned retirement. Other states handle retirement through general “substantial change in circumstances” standards, with far less predictability.
A general point applies to all three. Until a court signs a modification, the existing order controls. Stopping payments because you believe your ex is cohabiting is contempt, not self-help — the same principle that governs contempt of court in custody cases.
What actually persuades a judge?
Stripping away the state-by-state machinery, the same four things move the number nearly everywhere.
Documented earning capacity, not stated income. Courts impute income to a spouse who is voluntarily underemployed. A vocational evaluation showing what someone could earn frequently outweighs their current pay stub.
The marital standard of living, proved with records. This is an explicit factor in California and a live consideration almost everywhere. It is proved with bank statements, credit card histories and tax returns — not with a description of how the family used to live.
A specific plan. “I need to retrain” loses. “This 20-month program costs $18,400, and graduates in this metro earn a median of $61,000” wins. The specificity is the argument.
Clean conduct during the case. Hidden accounts, sudden “loans” to relatives, and a bonus that vanishes the quarter before trial all damage credibility on every other issue simultaneously.
Most spousal support is ultimately settled rather than tried, which is why the negotiation matters more than the courtroom. If you are heading toward one, divorce mediation resolves support far more cheaply than litigation, and our breakdown of what a divorce actually costs is worth reading before choosing a path. If you do not yet have counsel, what a family lawyer does explains when one becomes necessary.
Frequently Asked Questions
How is spousal support calculated?
It depends entirely on your state. Illinois applies a guideline formula of 33⅓% of the payor’s net income minus 25% of the payee’s net income, capped so the recipient’s total does not exceed 40% of combined net income. California uses no formula for long-term support and instead weighs 14 statutory factors. Texas caps payments at the lesser of $5,000 per month or 20% of the payor’s average monthly gross income. There is no national formula.
How long does alimony last?
Almost always tied to the length of the marriage. Florida caps durational alimony at 50%, 60% or 75% of the marriage length depending on whether it was short, moderate or long-term. Texas caps it at five, seven or ten years by bracket. California points courts toward one-half the length of the marriage as a general target for marriages under 10 years.
Is alimony tax deductible?
Not for any divorce finalized after December 31, 2018. Those payments are neither deductible by the payer nor taxable to the recipient. Divorces finalized on or before that date keep the old treatment unless a later modification expressly adopts the new rules.
Does permanent alimony still exist?
It is disappearing. Florida abolished it entirely effective July 1, 2023, leaving bridge-the-gap, rehabilitative and durational alimony. Some states still allow indefinite support after very long marriages, but the national direction is toward defined terms.
Does alimony stop if my ex remarries or moves in with someone?
Remarriage terminates support in most states. Cohabitation is less automatic — it typically allows a payer to ask for reduction or termination rather than ending payments by itself. Florida requires a court to reduce or terminate on written findings that a supportive relationship exists. Either way, you must get the order modified before you stop paying.
Can spousal support be waived in a prenuptial agreement?
In most states yes, subject to challenges for unconscionability, inadequate disclosure or duress. This is the sharpest difference from child support, which parents cannot waive because the right belongs to the child.
Do I get alimony if we were only married a few years?
Rarely, and in some states you cannot. Florida bars durational alimony after a marriage of less than three years. Texas generally requires a 10-year marriage unless disability, a child requiring substantial care, or family violence applies. Short-marriage awards, where they exist, tend to be brief and transitional.
Reviewed by Nora Whitman, Managing Editor. Our research and review process explains how we source and verify legal content.
