Tool · Investor Sam Life

Alimony Estimator

June 30, 2026 • By the Investor Sam Editorial Team • Reviewed by Berly Sam Varghese, Editor
Alimony, or spousal support, is one of the least predictable parts of a divorce because there is no single national formula — many states use their own income-based guidelines. This estimator applies a common income-share approach: a percentage of the paying spouse's income minus a percentage of the receiving spouse's income, over a support term. It gives a ballpark for the monthly payment and the total over the term, so you can plan even before a court sets the actual figure.

Example: Paying spouse monthly income: 8000 $ · Receiving spouse monthly income: 3000 $ · Share of payer income: 33 % · Share of payee income: 25 % · Support duration: 5 years

Estimated monthly alimony$1,890
Annual alimony$22,680
Total over the term$113,400

Worked example

Take a paying spouse earning $8,000 a month and a receiving spouse earning $3,000. Under a 33%-minus-25% income-share rule, support is 33% of $8,000 ($2,640) minus 25% of $3,000 ($750), or about $1,890 a month. That is roughly $22,680 a year, and over a five-year term about $113,400. Because states differ, treat this as a planning range, not a court order — an actual judge weighs the length of the marriage, standard of living, and earning capacity.

Frequently asked questions

Is there a nationwide alimony formula?

No. Some states publish guideline formulas for temporary support; many leave permanent alimony to judicial discretion based on factors like the length of the marriage, each spouse's needs and earning capacity, and the standard of living during the marriage. This tool uses a common income-share style as an estimate only.

How long does alimony last?

Duration varies widely. Short marriages may bring little or no long-term support, while long marriages can bring support for many years or until remarriage. Some states tie the term roughly to a fraction of the marriage's length. Set the duration here to match your situation or your attorney's guidance.

Is alimony taxable?

For divorce agreements finalized after 2018 under current federal law, alimony is generally not deductible by the payer nor taxable to the recipient. Older agreements may follow the prior rules. Confirm the tax treatment for your specific agreement date with a professional.

Can alimony be modified later?

Often yes. A significant change in circumstances — job loss, a large income change, remarriage, or retirement — can be grounds to ask a court to modify or end support, unless the agreement made it non-modifiable.

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Sources

Berly Sam Varghese · Editor, Investor Sam

Berly Sam Varghese is an engineer who treats money the way he treats any hard problem — something to be engineered, not gambled on. He funded years of education and built real financial stability the patient way, by living below his means and investing rather than borrowing. He writes for the person trying to make everyday money calls with a little more confidence. He reviews and approves every article on Investor Sam and checks the figures against primary sources before anything is published. More about our standards.