Alimony Calculator
Enter both spouses' incomes and years married to estimate alimony amount and duration.
Get a ballpark estimate of monthly alimony (spousal support) based on the income difference between spouses and the length of the marriage. Alimony laws vary greatly by state and are ultimately decided by judges; this calculator uses commonly applied guidelines as a rough reference.
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Last reviewed: April 2026Report an error
Estimated Monthly Alimony
$500
Est. $500/mo ($6,000/yr) for ~6.0 years. Income difference: $5,000/mo. This is a guideline estimate — courts vary widely.
Monthly Estimate
$500
Annual Estimate
$6,000
Est. Duration
6.0 years
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How to Use This Alimony Calculator
- Enter the higher earner's monthly gross income.
- Enter the lower earner's monthly gross income.
- Enter the number of years married.
- Read estimated monthly alimony and estimated duration.
Frequently Asked Questions
- There is no universal formula. Many states use rules of thumb like 30–40% of the income difference. Duration often correlates with marriage length. Judges have significant discretion.
- For divorces finalized after December 31, 2018: alimony is NOT deductible by the payer and NOT taxable income to the recipient (Tax Cuts and Jobs Act change).
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