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Alimony Calculator: Spousal Support Planning Estimate

Enter both incomes and the length of the marriage for a planning figure for spousal support and how long it might run. No state uses this calculator's formula: 7 states set the amount by a statutory formula or guideline in defined cases and most others weigh factors, so the table below gives each state's approach and the law to read before you negotiate or file.

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Updated Oct 22, 2026

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Higher-Earner Annual Gross Income

$0$5,000,000

Lower-Earner Annual Gross Income

$0$5,000,000

Marriage Length (years)

150

Minor Children?

Modeled Monthly Planning Amount

$2,200.00

Estimated • Based on your inputs

Modeled Annual Planning Amount

$26,400.00

Detailed Breakdown

Modeled Duration Horizon (months)80

Derived Higher-Earner Income After Model$93,600.00

58%

Derived Lower-Earner Income Plus Model$66,400.00

41%

Derived Scenario Income Ratio70.94%

Disclaimer: This calculator provides estimates for informational purposes only. Results should not be considered financial, tax, or legal advice. Consult a qualified professional for your specific situation.

How this calculator works

This is a planning model, not any state's law. It takes 33% of the positive difference between the two gross incomes you enter, or 25% when you select minor children (a sensitivity only: it does not compute child support). The duration horizon is four months per year of marriage under 10 years, eight months per year from 10 through 19, and twelve months per year from 20. It does not decide eligibility, need, ability to pay, the income a court would count, taxes, property division, the marital standard of living, earning capacity, health, misconduct, custody or any deviation, so it cannot predict an order.

Source: State statutes and court self-help pages (state table); IRS Topic 452 for federal tax checked 2026-08-07

How each state sets alimony

Each row names the state's statute or official court self-help page and how its framework works, as classified in this site's alimony source file (checked 2026-08-07; Arizona, Florida and Maine re-read and reclassified on 2026-10-11). The formula group means the statute, or guidelines it requires, sets the amount or caps it at a share of the income difference. The approach never changes the calculator's math.

State	Approach	Law or official guide
Alabama	Judge weighs statutory factors	Alabama Code §30-2-57
Alaska	Judge weighs statutory factors	Alaska Statutes §25.24.160(a)(2)
Arizona	Statutory formula or guideline in defined cases	Arizona Revised Statutes §25-319
Arkansas	Judge weighs statutory factors	Arkansas Code §9-12-312
California	Judge weighs statutory factors	California Family Code §4320
Colorado	Statutory formula or guideline in defined cases	Colorado Revised Statutes §14-10-114
Connecticut	Judge weighs statutory factors	Connecticut General Statutes §46b-82
Delaware	Judge weighs statutory factors	Delaware Code, title 13, §1512
Florida	Statutory formula or guideline in defined cases	Florida Statutes §61.08
Georgia	Judge weighs statutory factors	Georgia Courts, Family Law self-help resources (see O.C.G.A. §19-6-1)
Hawaii	Judge weighs statutory factors	Hawaii Revised Statutes §580-47
Idaho	Judge weighs statutory factors	Idaho Code §32-705
Illinois	Statutory formula or guideline in defined cases	750 ILCS 5/504
Indiana	Eligibility limits first	Indiana Code §31-15-7-2
Iowa	Judge weighs statutory factors	Iowa Code §598.21A
Kansas	Judge weighs statutory factors	Kansas Statutes §23-2902
Kentucky	Judge weighs statutory factors	Kentucky Revised Statutes §403.200
Louisiana	Judge weighs statutory factors	Louisiana Civil Code arts. 111–117
Maine	Statutory formula or guideline in defined cases	Maine Revised Statutes, title 19-A, §951-A
Maryland	Judge weighs statutory factors	Maryland Family Law §11-106
Massachusetts	Statutory formula or guideline in defined cases	Massachusetts General Laws, chapter 208, §53
Michigan	Judge weighs statutory factors	Michigan Compiled Laws §552.23
Minnesota	Judge weighs statutory factors	Minnesota Statutes §518.552
Mississippi	Judge weighs statutory factors	Mississippi Chancery Courts (see Miss. Code §93-5-23)
Missouri	Judge weighs statutory factors	Missouri Revised Statutes §452.335
Montana	Judge weighs statutory factors	Montana Code Annotated §40-4-203
Nebraska	Judge weighs statutory factors	Nebraska Revised Statutes §42-365
Nevada	Judge weighs statutory factors	Nevada Revised Statutes §125.150
New Hampshire	Not re-checked: read the statute	New Hampshire Revised Statutes §458:19
New Jersey	Judge weighs statutory factors	New Jersey Statutes §2A:34-23
New Mexico	Judge weighs statutory factors	New Mexico Courts, Divorce self-help (see N.M. Stat. §40-4-7)
New York	Statutory formula or guideline in defined cases	New York Domestic Relations Law §236(B)
North Carolina	Judge weighs statutory factors	North Carolina General Statutes §50-16.3A
North Dakota	Judge weighs statutory factors	North Dakota Century Code §14-05-24.1
Ohio	Judge weighs statutory factors	Ohio Revised Code §3105.18
Oklahoma	Judge weighs statutory factors	Oklahoma Statutes, title 43, §121
Oregon	Judge weighs statutory factors	Oregon Revised Statutes §107.105
Pennsylvania	Judge weighs statutory factors	Pennsylvania Consolidated Statutes, title 23, §3701
Rhode Island	Judge weighs statutory factors	Rhode Island General Laws §15-5-16
South Carolina	Judge weighs statutory factors	South Carolina Code §20-3-130
South Dakota	Judge weighs statutory factors	South Dakota Codified Laws §25-4-41
Tennessee	Judge weighs statutory factors	Tennessee Courts, Divorce self-help (see Tenn. Code §36-5-121)
Texas	Eligibility limits first	Texas Family Code, chapter 8
Utah	Judge weighs statutory factors	Utah Code §30-3-5
Vermont	Judge weighs statutory factors	Vermont Statutes, title 15, §752
Virginia	Judge weighs statutory factors	Virginia Code §20-107.1
Washington	Judge weighs statutory factors	Revised Code of Washington §26.09.090
West Virginia	Judge weighs statutory factors	West Virginia Code §48-6-301
Wisconsin	Judge weighs statutory factors	Wisconsin Statutes §767.56
Wyoming	Judge weighs statutory factors	Wyoming Statutes §20-2-114

A statewide statutory formula or guideline exists in a defined context, with eligibility, scope, and deviation rules: Arizona, Colorado, Florida, Illinois, Maine, Massachusetts and New York. Maintenance limited by eligibility rules before amount and duration: Indiana and Texas. Not reclassified on 2026-10-11, because its statute was not confirmed from an official source that day: New Hampshire. Everywhere else the court weighs the statute's factors.

Frequently Asked Questions

How is alimony calculated?

By state law, case by case. Arizona, Colorado, Florida, Illinois, Maine, Massachusetts and New York have a statutory formula or guideline that applies in defined situations, with eligibility rules and room to deviate; Indiana and Texas first restrict who can receive maintenance; most other states leave amount and duration to the judge under listed factors. This calculator applies one planning heuristic everywhere: with $120,000 and $40,000 incomes and a 10-year marriage it gives $2,200 a month for 80 months, a number to plan around, not a prediction.

Is alimony tax deductible?

For divorce or separation agreements executed after 2018, alimony is not deductible by the payer and not taxable income for the recipient for federal tax (IRS Topic 452). Older agreements keep the former treatment unless a later modification adopts the new rule. State treatment can differ.

All Calculators

California Alimony Calculator

California temporary spousal support by the common court guideline (40% of the higher net income minus 50% of the lower), plus how long long-term support usually starts out lasting.

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Florida Alimony Calculator

Florida durational alimony ceilings from net incomes and marriage length: the lesser of need or 35% of the net-income difference, for up to 50%, 60% or 75% of the marriage.

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