Alimony Estimator

Alimony, also called spousal support or spousal maintenance, is court-ordered financial support paid by one spouse to the other following a divorce or separation. Its purpose is to limit the economic disparity between spouses when one earned significantly more than the other during the marriage, or when one spouse sacrificed career advancement to support the household or raise children.

There is no single nationwide formula for calculating alimony in the United States. Each state has its own laws, and many states leave the amount and duration largely to the discretion of the judge based on factors that include: the length of the marriage, each spouse's income and earning capacity, the standard of living established during the marriage, each spouse's age and health, contributions to the other spouse's education or career, and childcare responsibilities.

Alimony can be temporary (during the divorce proceedings), rehabilitative (for a fixed period to allow the recipient to become self-supporting), permanent (in long marriages with significant earning disparity), or reimbursement-based (to repay a spouse who supported the other through education). The type and duration depend heavily on the specific circumstances of each marriage and jurisdiction. Always consult a qualified family law attorney for guidance specific to your state and situation.

1. Enter the gross monthly income of the higher-earning spouse.
2. Enter the gross monthly income of the lower-earning spouse.
3. Enter the number of years married.
4. Review the estimated monthly alimony range using two common calculation methods.
5. Note the estimated duration — generally, courts award alimony for roughly half the length of the marriage for marriages under 20 years.
6. Review the total estimated cost range over the duration of payments.

Alimony tax rules changed significantly with the Tax Cuts and Jobs Act of 2017. For divorces finalized after December 31, 2018, alimony is neither deductible for the paying spouse nor considered taxable income for the receiving spouse under federal law. This is a major change from prior law and affects the economics of alimony negotiations. For divorces finalized before 2019, the old rules (deductible/taxable) generally still apply unless the agreement is specifically modified.

Many factors that courts consider are not captured in simple income-based formulas. Marital misconduct, hidden assets, the presence of a prenuptial agreement, and each spouse's health and employability all influence outcomes significantly. A judge in one county may weigh these factors differently than one in a neighboring county even within the same state.

This tool is for educational purposes only and does not constitute legal advice. Alimony calculations are among the most jurisdiction-specific and fact-specific determinations in family law. The estimates produced here are rough approximations based on common formulas and should not be used to make any financial or legal decisions without first consulting a qualified family law attorney in your jurisdiction.