💵 Alimony Estimator
Estimate a reasonable range for spousal support based on income differences, marriage length, and common court formulas. Every state is different — this gives you a realistic starting point.
💙 Alimony is highly fact-specific. Courts weigh many factors beyond income. Always consult a family law attorney.
Your Information
$
$
Estimated Monthly Alimony
Low Estimate
$1,042/mo
25% of gap
Most Likely
$1,375/mo
33% of gap
High Estimate
$1,667/mo
40% of gap
Monthly income gap: $4,167
Estimated Duration — 10-Year Marriage
Duration Range4 years – 8 years
Long-term durational alimony
General rule of thumb: Duration is often roughly half the length of the marriage, but courts in many states have broad discretion.
Frequently Asked Questions
How is alimony calculated?
Most states use discretionary formulas. A common approach is 25–40% of the monthly income gap, adjusted for marriage length and circumstances.
How long does alimony last?
Duration scales with marriage length. Short marriages may get 6–12 months of support; marriages over 20 years may result in indefinite or permanent alimony.
Is alimony still tax deductible?
No. For divorces finalized after December 31, 2018, alimony is no longer deductible by the payer or taxable to the recipient under federal law.
Can alimony be changed after divorce?
Yes — either party can request modification if there's a substantial change in circumstances, like job loss, remarriage, or major income change.
Sources: NCSL Alimony Laws by State, IRS Topic 452 (Alimony), IRS Filing Status Rules. Last updated March 2026.