Estimate spousal support payments and duration for all 50 states. Includes state-specific formulas and types of alimony explained.
Important Disclaimer
These calculators provide estimates for educational purposes only. Alimony calculations vary significantly by state, judge, and individual circumstances. Results are not legal advice and do not create an attorney-client relationship. Consult a licensed family law attorney in your state for advice specific to your situation.
Alimony (also called spousal support or spousal maintenance) is financial support paid by one former spouse to the other after divorce. Unlike child support, which has standardized formulas in all 50 states, alimony calculations are far more varied — most states give judges broad discretion rather than a fixed formula.
A handful of states have enacted statutory formulas to bring more predictability to alimony. New York uses a formula: 30% of the payor's income minus 20% of the recipient's income, capped at 40% of combined income. Illinois calculates 33.3% of the payor's net income minus 25% of the recipient's net income. Massachusetts enacted the Alimony Reform Act in 2011, setting duration limits at 30-35% of income difference. Colorado has a statutory guideline of 40% of the higher earner's income minus 50% of the lower earner's income. Texas limits court-ordered maintenance to $5,000/month or 20% of gross income, whichever is less.
In states without a formula — California, Florida, New Jersey, Virginia, and most others — judges apply a multi-factor test weighing the length of the marriage, each spouse's earning capacity, the marital standard of living, each spouse's contributions, and the requesting spouse's ability to become financially independent. This calculator applies the general guideline of 30% of the income difference as a reasonable starting estimate for states without a specific formula.
Morgan earns $9,000/month and Casey earns $2,800/month. They were married for 14 years in Ohio. Casey worked part-time during the marriage to manage the household and care for children. Ohio uses judicial discretion with no fixed formula.
In practice, an Ohio judge would consider Casey's ability to increase income with full-time employment and training, whether the property settlement provides sufficient resources, and Casey's standard of living needs going forward. The actual award could be higher or lower depending on these factors. Always consult a licensed family law attorney for a case-specific evaluation.
Length of the Marriage
Marriage length is often the single most important factor in alimony determinations. Short marriages (under 5 years) rarely produce long-term alimony. Long marriages (20+ years) often result in indefinite support because the economic interdependence and career sacrifices made over decades cannot be easily reversed. The duration formulas in our calculator are based on widely-recognized guidelines — marriage length × a multiplier that increases with longer marriages.
Income Gap and Earning Capacity
Alimony addresses financial imbalance — the larger the income gap between spouses, the stronger the case for alimony. Courts look not just at current income but at realistic future earning capacity. A spouse who left a career to raise children may need education and training time before they can earn at their potential. Courts also consider whether the higher-earning spouse's career was supported by the other spouse's sacrifices — a doctor whose spouse worked to put them through medical school presents a strong case for alimony.
Marital Standard of Living
Alimony is meant to prevent an extreme disparity in post-divorce living standards. Courts look at the lifestyle established during the marriage — housing, vacations, spending habits, subscriptions, and daily expenses — and consider how to allow both spouses to maintain a reasonable, if not identical, quality of life. The marital standard of living serves as a ceiling for alimony in most states — courts generally will not award alimony that gives the recipient a higher lifestyle than they had during the marriage.
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Alimony duration depends primarily on the length of the marriage. For marriages under 5 years, most courts award alimony for roughly half the length of the marriage. For marriages of 5-10 years, courts typically award alimony for about 60% of the marriage length. For marriages of 10-20 years, duration is often 75% of the marriage length. For marriages over 20 years, courts frequently award indefinite or "permanent" alimony that continues until death, remarriage, or a major change in circumstances. These are general guidelines — courts have broad discretion and may award longer or shorter durations based on the specific facts of each case.
For divorce agreements finalized after December 31, 2018, alimony is not deductible by the payor and is not taxable income for the recipient under federal law. This was a significant change under the Tax Cuts and Jobs Act of 2017. For divorce agreements finalized before January 1, 2019, the old rules still apply: alimony is deductible by the payor and taxable income for the recipient — unless the agreement was modified after 2018 with both parties opting into the new tax treatment. State tax treatment may differ from federal treatment in some states. Consult a tax professional or family law attorney to understand the tax implications in your specific situation.
In most states, alimony can be modified or terminated if there is a substantial change in circumstances. Common qualifying changes include a significant income change for either spouse, the recipient's remarriage (which typically terminates periodic alimony automatically in most states), the recipient beginning cohabitation with a partner, or a significant health change affecting either party's earning capacity. Lump sum alimony is generally not modifiable once ordered. The existing alimony order remains in full effect until a court enters a modification — simply experiencing a change is not enough. File a motion to modify with the family court before stopping or reducing payments.
Judges typically consider a wide range of factors when determining alimony: the length of the marriage, the marital standard of living, each spouse's income and earning capacity, the age and health of both parties, each spouse's financial resources (including marital property awarded in the divorce), each spouse's contributions to the marriage (including homemaking, child-rearing, and career sacrifices), the requesting spouse's ability to become self-supporting, and in some states, the reasons for the divorce (marital fault). No single factor is determinative — judges weigh all factors together to determine what is fair and equitable given the specific circumstances of the marriage.
Whether adultery affects alimony depends significantly on your state. In traditional fault-based states like Virginia, North Carolina, South Carolina, Georgia, Louisiana, and Mississippi, adultery by the spouse seeking alimony can be a complete bar to receiving alimony. In other states, adultery may be one factor among many that a judge considers but does not automatically bar support. In no-fault states and many modern jurisdictions, the reasons for the marriage breakdown play little or no role in alimony calculations, which focus instead on financial need and ability to pay. Consult a family law attorney in your specific state to understand how fault affects alimony in your jurisdiction.