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Alimony & spousal support calculator

State statutory formulas and court guidelines — plain language, instant results.

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Alimony & spousal support calculator

Location
Income
The spouse who will pay support. Before tax.
The spouse who may receive support. Enter 0 if unemployed.
Marriage
Decimals OK — e.g. 8.5 for eight and a half years.

Your results

⚖️

Select a state and enter both incomes and marriage length to see your estimate. Your numbers never leave your browser.

⚠ This estimate is for planning purposes only. It is not legal advice, not admissible as evidence, and not a prediction of what any court will order. Consult a licensed family law attorney for guidance specific to your situation.

How it works

Step 1

Select your state

Each state uses a different legal term — spousal support, spousal maintenance, or alimony. We apply the correct statute and formula automatically.

Step 2

Enter incomes & marriage length

Gross income figures (payor and payee), years married, and whether minor children are involved. All inputs stay in your browser — nothing is sent to a server.

Step 3

Read your estimate

See the estimated monthly amount, duration range, the statute it's based on, and a plain-English explanation of what the number means — and what it doesn't.

Statutory guideline

New York — DRL §236(B)(5-a)

NY uses a mandatory formula: 30% of payor income minus 20% of payee income, capped so the payee doesn't exceed 40% of combined income. One of the few states with a true statutory guideline.

Statutory guideline

Illinois — 750 ILCS 5/504

Illinois applies a net-income formula with a statutory duration table. Courts must explain in writing any deviation — making IL one of the most formula-driven states in the country.

Always remember

Planning tool — not legal advice

Only 3 states have mandatory formulas. For most states this is a benchmark range only. Always consult a licensed family law attorney for guidance specific to your situation.

Read the full methodology →

Alimony guides

Plain-language answers to the most common alimony questions.

Formulas

How alimony is calculated

State-by-state breakdown of the formulas, factors, and caps courts use to set a spousal support amount — from NY's mandatory formula to purely discretionary states.

Duration

How long does alimony last?

Duration rules vary wildly by state and marriage length. See the duration tables, statutory caps, and when courts can award permanent support.

Terminology

Alimony vs. spousal support

Same concept, different names. Learn which states call it alimony, spousal support, or spousal maintenance — and whether the name changes the legal rules.

Taxes

Alimony & taxes after the TCJA

The 2017 Tax Cuts and Jobs Act flipped alimony tax treatment for divorces finalized after Dec. 31, 2018. Here's what payors and payees need to know in 2026.

Browse all guides →

Browse by state

All 50 states. Each page uses the correct local legal term and explains the statute.

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