Alimony Calculator
Estimate spousal support amounts using common judicial formulas. For general guidance only.
⚖️ Legal Disclaimer: This calculator provides estimates for general informational purposes only. Alimony laws vary significantly by state and judges have broad discretion. Consult a licensed family law attorney in your state for accurate, case-specific advice.
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Judges have wide discretion — state formulas are guidelines, not guarantees
Estimated Monthly Alimony Range
Estimated Duration
• Under 5 years: ~50% of marriage length
• 5–10 years: ~60% of marriage length
• 10–20 years: indefinite / open-ended
• 20+ years: potentially permanent
⚖️ Reminder: This calculator provides estimates for general informational purposes only. Alimony laws vary significantly by state. Consult a licensed family law attorney in your state for accurate advice.
Guide
How it works
Understanding Alimony (Spousal Support)
Alimony — also called spousal support or spousal maintenance depending on the jurisdiction — is a payment made from one spouse to another following divorce or separation. Unlike child support, which has federally mandated numerical guidelines, alimony in the United States remains largely at the discretion of individual judges, guided by state statutes that enumerate factors to consider rather than formulas to follow. This makes alimony inherently less predictable and more susceptible to courtroom advocacy.
American courts recognize several distinct types of alimony, each serving a different purpose. Temporary alimony (often called pendente lite, Latin for "while the litigation is pending") is awarded during the divorce proceedings themselves to maintain the financial status quo until a final order is entered. Rehabilitative alimony is the most common modern type: it is time-limited and intended to help the receiving spouse gain education, training, or work experience to become self-sufficient. Reimbursement alimony compensates a spouse who sacrificed career development to support the other's professional advancement — for example, working to put a spouse through medical school. Permanent alimony was historically common but has fallen out of favor; today it is typically reserved for long marriages with large income disparities where the receiving spouse is elderly or permanently disabled.
The single most consequential change to alimony in decades was enacted by the Tax Cuts and Jobs Act of 2017 (TCJA), effective for divorce agreements executed on or after January 1, 2019. Before this date, alimony was deductible by the paying spouse and taxable income for the recipient — a structure that incentivized higher awards because the net cost to the payor was reduced by their marginal tax rate. After TCJA, alimony is neither deductible nor taxable. This eliminated a powerful negotiating dynamic and, many family law attorneys argue, has reduced the size of settlements because payors are no longer receiving a tax offset. For divorces finalized before January 1, 2019, the old rules still apply — the TCJA change is not retroactive unless the parties modify their agreement to explicitly opt into the new treatment.
Judges consider an array of factors when setting alimony. Common statutory factors include the length of the marriage, the standard of living established during the marriage, each spouse's age and physical health, the earning capacity and employability of each party, contributions to the marriage including homemaking and child-rearing, whether one spouse interrupted career development for the benefit of the family, and the existence of other financial obligations including child support. Courts do not look favorably on trying to calculate a formula from these factors — a skilled advocate presents them as a narrative of relative need and ability to pay.
Most alimony orders include provisions for modification or termination. Termination is automatic in virtually every state upon the recipient's remarriage. Many states also terminate support upon cohabitation with a romantic partner, though proving cohabitation has spawned considerable litigation. The Uniform Marriage and Divorce Act, adopted in various forms by many states, permits modification whenever there is a substantial and continuing change in circumstances for either party.
Prenuptial and postnuptial agreements can dramatically alter alimony outcomes — and are increasingly common. Courts enforce prenuptial agreements that waive alimony when they meet procedural requirements (voluntary signing, full financial disclosure, independent legal counsel for each party, reasonable time before the wedding). Some states will not enforce a complete alimony waiver if it would leave a spouse in need of public assistance.
The trend in family law over the past two decades has been strongly away from permanent alimony and toward shorter-term rehabilitative support, reflecting changing assumptions about gender roles and labor force participation. Massachusetts reformed its alimony statute in 2012 to impose specific durational caps based on marriage length. Tennessee enacted a similar formula-based approach. The states with the most judicial discretion — including California, New York, and Florida — continue to produce the most unpredictable outcomes, making legal counsel even more valuable in those jurisdictions.
Mediation — working with a trained neutral facilitator outside of court — produces settlements in the majority of contested divorces that go through the process. Mediated agreements tend to be honored more consistently than court-imposed orders, simply because both parties had a hand in crafting them. The financial savings compared to contested litigation can be substantial, and the emotional toll on families — particularly when children are involved — is measurably lower.
Is alimony tax deductible for the paying spouse?expand_more
Only for divorces finalized before January 1, 2019. The Tax Cuts and Jobs Act of 2017 (TCJA) eliminated the alimony tax deduction for all divorce agreements executed on or after that date. Under the new rules, the paying spouse gets no deduction and the receiving spouse pays no income tax on alimony received. For pre-2019 divorces, the old rules still apply unless the parties explicitly opt into the new treatment through a modification.
How long does alimony last?expand_more
Duration depends heavily on the length of the marriage and the state. Common guidelines suggest short marriages (under 5 years) might result in support lasting roughly 50% of the marriage duration. Marriages of 5–10 years might yield 60% of the marriage duration. Marriages over 10–15 years often result in open-ended or indefinite support. Marriages of 20 or more years can lead to permanent alimony in some states, though this is increasingly rare. Many states have enacted durational caps.
Can alimony be modified after it is ordered?expand_more
Yes, in most cases. Either party can petition the court to modify alimony upon a substantial change in circumstances — such as a significant change in income for either spouse, the recipient becoming self-supporting, retirement, disability, or remarriage of the recipient. Most agreements also include automatic termination clauses upon the recipient's remarriage or, in many states, cohabitation with a romantic partner.
What is the difference between alimony and child support?expand_more
Alimony is paid from one spouse to the other — it is spousal support intended to address income disparity between the adults. Child support is paid for the benefit of the children, calculated separately based on parental incomes and custody time. They are independent obligations: a parent can owe both simultaneously. Child support has federal guidelines requiring states to maintain numerical formulas; alimony has no such federal mandate and varies far more by state and judge.
Does living with a new partner affect alimony?expand_more
Very often yes. Most states either automatically terminate or allow courts to reduce alimony when the recipient cohabitates with a romantic partner, on the theory that shared living expenses reduce financial need. Cohabitation clauses are standard in most settlement agreements. Proving cohabitation (as distinct from occasional overnight stays) has generated substantial litigation, and standards vary by state. The clearest termination trigger remains remarriage, which automatically ends alimony in nearly all states.
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