Alimony Calculator by State
Estimate spousal support using each state's statutory formula or official guideline. Only states with a codified calculation method are included — other states leave the amount entirely to court discretion.
Select your state
Each calculator uses that state's actual statute or published guideline. Results are estimates — courts may deviate for cause.
750 ILCS 5/504 33.33% of payor net − 25% of payee net (≤ 40% combined)
Highest-volume state for this keyword; statutory formula.N.Y. Dom. Rel. Law §236B(6)(e) 30% of payor gross − 20% of payee gross (or 40% of combined − 2× payee, whichever is lower)
Formula-based since 2016.C.R.S. §14-10-114(3)(b) 40% of payor MAGI − 50% of payee MAGI
Advisory guideline; courts may deviate.Tex. Fam. Code §8.055 Lesser of $5,000/month or 20% of payor gross monthly income
Statutory cap; requires 10+ years of marriage.Why only these four states?
Most states leave alimony (also called spousal maintenance or spousal support) entirely to judicial discretion — there is no formula, and the outcome depends on the judge's weighing of factors like income, marriage length, and the "marital standard of living." A calculator would be guesswork for those states.
Illinois, New York, Colorado, and Texas each have a statutory formula or an official advisory guideline that produces a specific number from the parties' incomes and the marriage length. That makes a meaningful calculator possible.
How to use these calculators
Enter the paying spouse's monthly income, the receiving spouse's monthly income, and the years of marriage. Each calculator outputs the guideline monthly amount and the expected duration. Use it to understand the ballpark before speaking with a family law attorney.