How Alimony is Calculated — State-by-State Breakdown (2026)

Alimony — also called spousal support or spousal maintenance depending on the state — is a court-ordered payment from one spouse to the other following separation or divorce. Unlike child support, which follows rigid formula guidelines in most states, alimony is largely discretionary: judges weigh a statutory list of factors and set both the amount and duration based on the specific circumstances of each case. This guide explains how that process works and what you can expect.

Quick overview

No universal formula: Most states give judges wide discretion; only a handful have mandatory calculation formulas.
Two key questions: Courts determine (1) how much to pay per month, and (2) for how long.
Marriage length matters most: Longer marriages generally result in higher amounts and longer — sometimes indefinite — duration.
Income gap drives the amount: The difference between the spouses' incomes is the primary driver in states that use formulas.
Post-2018 tax change: Alimony is no longer deductible for payers or taxable for recipients for divorces finalized after December 31, 2018.
Terminates on remarriage: Alimony almost always ends automatically when the recipient remarries.

How Courts Decide Alimony: The Key Factors

While factors vary slightly by state statute, virtually every court considers the following when setting alimony (Uniform Marriage and Divorce Act; state family law codes):

Length of the marriage — the single most predictive variable for both amount and duration
Standard of living during the marriage — courts try to help the lower-earning spouse maintain a comparable lifestyle
Each spouse's income and earning capacity — current wages plus potential future earnings based on education, work history, and job market
Age and physical health — older spouses or those with disabilities limiting employment receive more support
Contributions to the marriage — homemaking, child-rearing, relocating for the other's career, or supporting the other's education
Financial resources and property division — what each party takes from the marital estate
Marital fault — adultery, abandonment, or cruelty can affect awards in about 30 states that still consider fault
Tax consequences — post-2018, tax treatment is neutral for both parties

States With Alimony Formulas

A growing number of states have adopted advisory formulas for general-term alimony, though judges can deviate when circumstances warrant:

State	Formula Approach
California	40% of higher earner's net monthly income minus 50% of lower earner's net monthly income (guideline, not mandatory)
Massachusetts	30–35% of the difference in the parties' gross incomes (General Term Alimony)
New York	20% of payor's income minus 25% of recipient's income; capped at 40% of combined income
Illinois	33.3% of payor's net income minus 25% of recipient's net income
Texas	Lesser of $5,000/month or 20% of payor's average gross monthly income
Colorado	40% of higher income minus 50% of lower income (advisory)

States Using Pure Judicial Discretion

States including Florida, Georgia, Virginia, North Carolina, and many others give judges broad discretion with no fixed formula. The judge reviews all statutory factors and sets an amount deemed "just and equitable." Outcomes are less predictable but allow case-specific fairness — a long-term homemaker in a 30-year marriage will receive far more consideration than a 3-year marriage where both spouses worked.

How Duration of Alimony Is Set

Duration is strongly correlated to marriage length across all states:

Marriage Length	Typical Duration Range	Common Type
Under 3 years	Often none, or very short-term	Rehabilitative or none
3–7 years	25–50% of marriage length	Rehabilitative
7–15 years	50–75% of marriage length	Rehabilitative or limited-term
15–20 years	May be indefinite with periodic review	Long-term / reviewable
20+ years	Often permanent or until retirement	Permanent / indefinite

Types of Alimony

Temporary (Pendente Lite): Paid while the divorce is pending — maintains the status quo during proceedings.
Rehabilitative: Time-limited support to allow the lower-earning spouse to gain education, job skills, or re-enter the workforce. Most common type in shorter marriages.
Reimbursement: Compensates one spouse for supporting the other through professional school or career advancement (e.g., paying for law school while the other studied).
Lump-sum: A one-time payment in lieu of ongoing monthly payments — often used for a clean break.
Permanent / Indefinite: Continues until death, remarriage, or court modification. Typically reserved for long marriages where the lower-earning spouse cannot realistically become self-supporting.

When Does Alimony Terminate?

Alimony terminates automatically in most states when:

The recipient remarries
Either party dies
A court-ordered end date is reached
The recipient cohabits with a romantic partner (in many states, this creates a rebuttable presumption of reduced need)

It can also be modified or terminated by court order if either party experiences a substantial change in circumstances — such as job loss, disability, a major income change, or the payor's retirement.

Alimony and Taxes (Post-2018 Rules)

The Tax Cuts and Jobs Act of 2017 changed alimony tax treatment for divorce agreements executed after December 31, 2018:

Alimony payments are not deductible for the payer
Alimony received is not taxable income for the recipient
Pre-2019 agreements are grandfathered under the old rules (deductible for payer, taxable for recipient) unless voluntarily modified to opt in to the new rules

Pros and Cons

Pros for Recipient	Cons for Payer
Maintains standard of living post-divorce	Long-term financial obligation
Time to become self-supporting (rehabilitative)	Subject to contempt if payments stop
Recognizes non-financial contributions to marriage	Income changes require court modification
No longer taxable income (post-2018)	No longer tax deductible (post-2018)

FAQ

How is alimony calculated if we live in a state without a formula?

In discretion states, the judge weighs all statutory factors — primarily marriage length, income gap, standard of living, and each spouse's earning capacity — and sets an amount they consider equitable. Our alimony calculator models these factors to provide an estimate, but outcomes will vary by judge and jurisdiction.

Can alimony be waived in a prenuptial agreement?

Yes, in most states. A valid prenuptial or postnuptial agreement can waive, limit, or specify alimony terms. Courts will generally enforce such agreements if they were entered voluntarily and with full financial disclosure.

Does cohabiting with a new partner end alimony?

In many states, cohabitation with a romantic partner creates a presumption that support is no longer needed and allows the payer to seek modification or termination. Rules vary significantly by state.

What happens if I stop paying alimony?

Failure to pay court-ordered alimony is contempt of court. Consequences can include wage garnishment, bank levies, driver's license suspension, and in serious cases, incarceration.