Alimony Calculator
Estimate spousal support amount and duration based on marriage length, income disparity, age, and standard of living factors across multiple calculation methods.
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How It Works
Alimony (spousal support or spousal maintenance) is financial support paid by a higher-earning spouse to a lower-earning spouse after divorce. The amount is based on the income disparity between spouses, and the duration is tied to the length of the marriage. Courts have significant discretion and consider factors like age, health, earning capacity, and contributions to the marriage.
The Formula
Variables
- 1/3 Method — One-third of the difference between the spouses' incomes
- 40% Method — 40% of combined income minus the lower earner's income
- 30/20 Method — 30% of payer's income minus 20% of receiver's income
- Needs-Based — 40% of the gap between marital standard of living and receiver's income
- Duration Factor — Ranges from 30% for short marriages to 100% for marriages over 20 years
Worked Example
Higher earner: $120,000/yr ($10,000/mo), Lower earner: $40,000/yr ($3,333/mo), 15-year marriage, 1/3 method: Monthly = ($10,000 - $3,333) / 3 = $2,222. Duration = 15 x 12 x 0.70 = 126 months (10.5 years). Total = $279,972.
Practical Tips
- Alimony formulas are guidelines only -- judges have discretion to deviate based on specific circumstances.
- Alimony may be temporary (rehabilitative) to allow the receiving spouse time to become self-supporting, or long-term for lengthy marriages.
- Remarriage of the receiving spouse typically terminates alimony obligations in most states.
- Cohabitation with a new partner may also reduce or eliminate alimony in many jurisdictions.
- Since 2019, alimony payments are no longer tax-deductible for the payer or taxable income for the receiver under federal law.
- Prenuptial agreements can override default alimony rules if properly executed.
Frequently Asked Questions
How long does alimony last?
Alimony duration depends heavily on the length of the marriage and the receiving spouse's ability to become self-supporting. Short marriages (under 5 years) may result in 1-3 years of rehabilitative support. Marriages of 10-20 years typically result in support lasting 50-85% of the marriage length. Marriages over 20 years may result in indefinite or permanent alimony, especially if the receiving spouse is over 50 or has limited earning capacity.
What is the difference between temporary and permanent alimony?
Temporary alimony (pendente lite) is paid during the divorce proceedings. Rehabilitative alimony is paid for a set period to help the receiving spouse gain education or job skills. Permanent alimony has no set end date and is typically reserved for long marriages where the receiving spouse cannot become self-supporting. Even permanent alimony can be modified if circumstances change substantially.
Can alimony be modified after the divorce?
In most states, alimony can be modified upon a showing of a substantial change in circumstances. Common triggers include the payer's job loss, retirement, or disability; the receiver's increased income; the receiver's cohabitation or remarriage; or significant changes in either party's financial situation. However, if the divorce agreement includes a non-modifiable alimony clause, modification may not be possible.
How is alimony different from child support?
Child support is for the financial needs of the children and follows strict state guidelines. Alimony is for the lower-earning spouse's support and involves more judicial discretion. Child support takes priority over alimony in calculations. Child support is always non-taxable, while alimony tax treatment depends on when the agreement was finalized. Child support ends when children reach adulthood, while alimony duration is based on marriage length.