Alimony Calculator
Estimate monthly alimony (spousal support) payments based on income difference and the length of the marriage.
What is Alimony?
Alimony, also called spousal support or maintenance, is a payment made by one spouse to the other during or after a divorce. Its purpose is to provide financial support to the lower-earning spouse, helping them maintain a standard of living similar to what they had during the marriage while they transition to financial independence.
Alimony amounts and durations are determined by courts based on many factors, including each spouse’s income, the length of the marriage, the standard of living, and each spouse’s earning capacity. While the rules vary by state, common formulas provide a useful starting point for estimation.
How to Use the Alimony Calculator
The calculator needs three inputs:
- Higher earner’s annual income.
- Lower earner’s annual income.
- Length of the marriage in years.
Press Calculate Alimony to see the estimated monthly and annual payments, along with an estimated duration.
How Alimony is Estimated
Many states use formulas based on the income difference between spouses. A common rule of thumb is that alimony equals roughly 30% of the difference between the spouses’ annual incomes, paid monthly. The duration is often tied to the length of the marriage, frequently calculated as a percentage of the marriage duration (commonly 30% to 50%).
Example Calculation
The higher-earning spouse earns $120,000 per year and the lower-earning spouse earns $40,000. The marriage lasted 10 years.
| Item | Value |
|---|---|
| Higher Earner Income | $120,000 |
| Lower Earner Income | $40,000 |
| Income Difference = 120,000 − 40,000 | $80,000 |
| Annual Alimony = 80,000 × 0.30 | $24,000 |
| Monthly Alimony = 24,000 ÷ 12 | $2,000 |
| Estimated Duration ≈ 10 × 0.40 | 4 years |
The estimated alimony is $2,000 per month for about 4 years.
Why Alimony Matters
Alimony is a critical part of divorce planning because it addresses the economic disparity that often exists after a marriage ends. For the receiving spouse, it provides time to gain education, training, or employment. For the paying spouse, it is an important financial obligation to budget for. Understanding a realistic estimate helps both parties negotiate and plan for the future.
How the Calculator Works
The calculator subtracts the lower earner’s income from the higher earner’s income to find the difference, then applies a 30% factor to estimate annual support and divides by 12 for the monthly amount. The duration is estimated as 40% of the marriage length in years. These are general guidelines, not a binding legal formula.
Important Notes
Alimony laws vary significantly by state and country, and courts consider many factors beyond income and marriage length, including health, age, earning capacity, and contributions to the marriage. This calculator provides a rough estimate for planning purposes only and is not legal advice. Consult a family law attorney for guidance specific to your situation.
Frequently Asked Questions
How is alimony different from child support?
Alimony supports a former spouse, while child support supports children. They are calculated separately and may both be part of a divorce order.
Is alimony taxable?
Under current U.S. rules, alimony paid under agreements or orders after 2018 is not deductible by the payer and not taxable to the recipient. Verify the rules that apply to your agreement.
How long does alimony last?
It depends on the state and circumstances. Some orders are temporary, some are for a set term, and for long marriages some may be for life or until remarriage.
Can alimony be modified?
Yes. Alimony can often be modified if there is a significant change in circumstances, such as a major income change, retirement, or remarriage.
Start Calculating Now
Use the Alimony Calculator above to get a quick estimate of potential spousal support. It is a helpful first step in understanding the financial picture of a divorce.