💍 Family Law Tool

Alimony / Spousal Support Calculator

Estimate monthly spousal support amount and duration based on your state's approach, marriage length, and both parties' incomes.

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💍 Marriage & Income Details
Alimony is primarily driven by the income gap between spouses and the length of the marriage. Enter all figures as gross (before tax) amounts.
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📊 Estimated Spousal Support

Based on income gap, marriage length, and your state's approach
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Shorter duration / lower award
Est. Duration
Typical support period
Income Comparison
💼 Higher Earner Monthly
💛 Lower Earner Monthly
📊 Income Gap (Basis for Alimony)
💰 Est. Monthly Support Payment
Key Factors
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⚖️ A Family Law Attorney Can Make a Significant Difference

Alimony awards are highly discretionary in most states and depend heavily on how your attorney presents factors like standard of living, earning capacity, and contributions to the marriage. Whether you're the payor or recipient, experienced representation can mean thousands of dollars per year in difference. Many offer free initial consultations.

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How Alimony Is Determined

Alimony (also called spousal support or spousal maintenance) is financial support paid by the higher-earning spouse to the lower-earning spouse after divorce. Unlike child support, there is no universal formula — courts have broad discretion based on a long list of statutory factors.

The most common formula used as a starting point in practice is: monthly support ≈ 30–40% of the income gap between spouses. For example, if one spouse earns $10,000/month and the other earns $3,000, the gap is $7,000 — and a typical award might be $2,100–$2,800/month. This is a guideline, not a rule.

Duration is typically tied to marriage length. Short marriages (under 5 years) often result in temporary rehabilitative alimony lasting 1–3 years. Medium marriages (5–15 years) may result in 3–8 years of support. Long marriages (15+ years) can result in permanent alimony, especially if one spouse was a long-term homemaker or gave up career advancement for the family.

Tax treatment changed in 2019. For divorces finalized after December 31, 2018, alimony is no longer deductible by the payor or taxable income to the recipient — a major change from prior law. This effectively increased the after-tax cost to payors and decreased the value to recipients, which has influenced negotiation strategies.

Frequently Asked Questions

Most states use a discretionary standard rather than a fixed formula, but courts typically consider: the income and earning capacity of both spouses, the length of the marriage, the standard of living during the marriage, the age and health of both parties, contributions to the marriage (including homemaking and child-rearing), and fault in some states. A common starting estimate attorneys use is 30–40% of the income gap between spouses, adjusted up or down based on the other factors.
Yes. Alimony can typically be modified if there is a "substantial change in circumstances" — such as the recipient getting a higher-paying job, the payor losing their job or retiring, or either party having a significant change in health or financial status. Alimony automatically terminates in most states upon the recipient's remarriage. Cohabitation with a new partner may also be grounds for termination or reduction in many states, though this varies.
In "at-fault" divorce states (about half of all states), marital misconduct (infidelity, abandonment, cruelty) can significantly affect alimony awards. Courts in these states may award higher alimony to the victimized spouse or deny alimony to the spouse who was at fault. In "no-fault" divorce states, marital conduct generally cannot be considered in setting alimony. Even in no-fault states, financial misconduct (hiding assets, dissipation of marital funds) can factor into the overall property division.