Legal calculator

Alimony Estimator, Spousal Support Amount & Duration

Estimate alimony (spousal support) amount and duration based on marriage length, income difference, and state guidelines. Educational estimates only.

Published by · Reviewed against primary-source formulas

Alimony is highly discretionary. Courts weigh many factors beyond income. This estimate is for planning purposes only.

$
$
yrs

For rehabilitative/reimbursement alimony

Est. Monthly Amount

–

Rough range midpoint

Monthly Range

–

Low to high estimate

Est. Duration

–

Months

Total Est. Alimony

–

Over full term

How CalcMesh estimates alimony

There is no single national alimony formula; awards vary widely by state and by judicial discretion. We apply common guideline approaches, typically a percentage of the income difference adjusted for marriage length, to produce a rough range.

Because state law governs the actual award, our figure is an educational estimate only; the guideline assumptions we use are listed in our methodology. Consult a licensed family-law attorney.

Types of Alimony

  • Rehabilitative: Most common. Provides support while the lower-earning spouse retains job skills, completes education, or re-enters the workforce. Duration: 1-5 years typically.
  • Permanent: Long marriages where one spouse can't become self-supporting due to age, disability, or having been out of the workforce for 15+ years.
  • Reimbursement: Compensates a spouse who supported the other's education or career advancement (e.g., putting them through medical school).
  • Bridge-the-Gap: Short-term (usually ≤2 years) to help transition from married to single life.

Common Formula Approaches

Some states use guideline formulas as starting points:

  • Simple approach: 30% of higher earner's gross minus 20% of lower earner's gross
  • Duration rule: Duration = 1 year of alimony per 3 years of marriage (varies)
  • Need-based: Close the gap to 40% of combined marital income

Factors Courts Consider

  • Standard of living during marriage
  • Age and physical/emotional condition of each spouse
  • Duration of marriage
  • Contributions as homemaker/parent
  • Each spouse's earning capacity and education
  • Marital misconduct (in fault states)

Disclaimer: Alimony is highly discretionary. Courts apply multi-factor tests with wide latitude. This calculator provides rough estimates only. Consult a licensed family law attorney in your state.

Methodology & Assumptions

This calculator implements standard formulas drawn from primary-source authorities. Values are point-in-time estimates; consult a licensed professional for high-stakes decisions. See the per-input definitions and source citations below.

How this works

Computations are deterministic and run client-side, no inputs leave your browser. Formulas are derived from standard published formulas for the calculator's domain (mortgage, taxes, energy, conversions, etc.). When the underlying agency publishes updated rates or thresholds we refresh defaults and update the page's lastmod timestamp.

Frequently Asked Questions

How is alimony calculated?
There is no single federal formula. Most states use a multi-factor test weighing: length of marriage, income difference, standard of living, age and health, and contributions as a homemaker. Some states have formulas (e.g., 30% of higher earner's income minus 20% of lower earner's income). Courts have wide discretion.
Does fault affect alimony?
In fault states (about 30), adultery or other marital misconduct can affect alimony awards, a cheating spouse may receive less or none, or pay more. In no-fault states, fault doesn't matter. Consult an attorney about your state's approach.
Is alimony taxable?
For divorces finalized after December 31, 2018: alimony payments are NOT deductible by the payer and NOT taxable income to the recipient. This reversed decades of prior tax treatment. Divorces finalized before 2019 may still follow the old rules under the divorce agreement.
Can alimony be modified or terminated?
Yes. Courts can modify alimony if circumstances change significantly (job loss, major income change, cohabitation, remarriage). Permanent alimony typically terminates on the recipient's remarriage. Rehabilitative alimony ends at a set date or when the recipient becomes self-supporting.

Related Calculators

👶
Legal

Child Support Estimator

Estimate monthly child support using income shares and percentage of income models.

📋
Legal

Divorce Cost Estimator

Estimate total divorce costs by state, complexity, and path (DIY to contested trial).

💳
Legal

Bankruptcy Means Test Calculator

Check Chapter 7 bankruptcy eligibility by comparing income to your state's median.

🎯
Legal

Grant Eligibility Quick Checker

Answer a few questions to discover matching federal and state grant categories.

💰
Finance

Loan Calculator

Calculate monthly payments, total interest, and amortization schedule for any loan type.

🏠
Finance

Mortgage Calculator

Estimate monthly mortgage payments including principal, interest, taxes, and insurance.

This page identifies the inputs, method, and limitations behind its estimates. Calculator outputs are not professional advice and should be checked against the relevant primary source for a consequential decision. This calculator's formula and defaults are drawn from standard published sources for its domain, no figure is typed in by an editor. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error.

Inputs, defaults, and authoritative sources
Input Default Source / authority
All inputs Domain-typical defaults Editorial methodology, CalcMesh 2026