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Planning estimate: monthly alimony from the income gap (30–40%) and duration as a fraction of marriage length. Not legal advice.
Quick answer: Alimony Estimator
Rough maintenance from marriage length, income gap %, and a duration multiplier - educational only.
Example: 10-year marriage, $8k vs $3k monthly → duration might span years while amount tracks a slice of the $5k gap depending on sliders.
Calculations follow the documented formula on this page; rounding and input units can change the last digit-treat outputs as educational estimates unless you reconcile with source systems.
* This is an estimate. Actual amounts may vary slightly based on input assumptions.
Alimony statutes vary wildly; this applies a gap percentage band and scales months-of-duration off marriage years so you can sanity-check negotiations.
Planning estimate: monthly alimony from the income gap (30–40%) and duration as a fraction of marriage length. Not legal advice.
Inputs on this page: Marriage length (years), Higher earner monthly income ($), Lower earner monthly income ($), Alimony as % of monthly income gap. Assumptions stay visible so you can reproduce the figure elsewhere.
Long-form walkthroughs that pair well with this calculator. When you need narrative context beyond the live fields, start here and return to the tool to plug in your own numbers.
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Read guide →People who care about alimony estimator use Alimony Estimator as a planning sandbox: Tax treatment (pre- vs post-TCJA agreements) changes net cash - ask a CPA.
Continue in the Legal category hub, the Utility tools collection, or the glossary. Related calculators in this session: Net Worth Calculator, Settlement Calculator, Legal Fee Estimator, Child Support Calculator, Accident Compensation Calculator, Privacy Policy Generator.
The Formula
Monthly ≈ income gap × selected %; duration ≈ marriage years × 12 × multiplier| This tool | Monthly ≈ income gap × selected %; duration ≈ marriage years × 12 × multiplier |
|---|---|
| Related intent: alimony estimator | See paired tools for alimony estimator-each page documents its own core relationship next to the live form. |
| Related intent: spousal support calculator | See paired tools for spousal support calculator-each page documents its own core relationship next to the live form. |
Core relationship for Alimony Estimator:
Monthly ≈ income gap × selected %; duration ≈ marriage years × 12 × multiplier
Worked check: 10-year marriage, $8k vs $3k monthly → duration might span years while amount tracks a slice of the $5k gap depending on sliders.
Keep the same assumptions and open a neighbor calculator when your question branches: Net Worth Calculator, Settlement Calculator, Legal Fee Estimator, Child Support Calculator. Each page documents its own formula beside the fields.
Learning links: Methodology · Editorial policy · Glossary
10-year marriage, $8k vs $3k monthly → duration might span years while amount tracks a slice of the $5k gap depending on sliders.
Re-enter the same numbers in the calculator above to confirm the page math matches the interactive result.
People who care about alimony estimator use Alimony Estimator as a planning sandbox: Tax treatment (pre- vs post-TCJA agreements) changes net cash - ask a CPA.
Instant response
Run Alimony Estimator in the browser and read the breakdown beside the form.
Transparent formula
The formula and worked example on this page match what the calculator uses.
Privacy friendly
No account required; inputs stay in your session unless you choose to share them.
Cross-device ready
Layout works on mobile, tablet, and desktop for the same field labels.
Official references for context. Calculator outputs are planning estimates—confirm material decisions with the primary authority or a qualified professional. See our methodology and editorial policy.
Reviewed July 18, 2026 · Content stamp 2026-07-18
Click a question to expand the answer.
Yes, the Alimony Estimator is completely free with no hidden limits.
Yes. All tools are optimized for desktop, tablet, and mobile devices.
Courts weigh length of marriage, need, and ability to pay; the multiplier lets you model shorter vs longer awards.
Rough maintenance from marriage length, income gap %, and a duration multiplier - educational only.
10-year marriage, $8k vs $3k monthly → duration might span years while amount tracks a slice of the $5k gap depending on sliders.
Tax treatment (pre- vs post-TCJA agreements) changes net cash - ask a CPA. Courts weigh need, ability, age, health, and custody - not captured here. Document imputed income debates separately; this assumes reported W-2 style numbers.
No. Use it as a transparent planning check, then verify critical outcomes in your own systems or with a qualified professional when stakes are high.
Compare units, rounding, compounding, and tax basis side by side. This page documents: Monthly ≈ income gap × selected %; duration ≈ marriage years × 12 × multiplier
Same-category picks first, then high-intent neighbors that often answer the next calculation question.
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Reviewed by Toollabz Editorial
Product editor | Last reviewed July 18, 2026
See methodology and editorial policy.