How Alimony Is Calculated in Every State (2026 Guide)
Learn how alimony (spousal support) is calculated in all 50 states. Understand which states have formulas, duration limits, caps, and recent reforms — with real examples and state-by-state rules.
1. How States Calculate Alimony
Unlike child support, which has statutory formulas in every state, alimony calculation is far less standardized. States fall into roughly four categories:
Formula States (~5)
NY, IL, NH, CO, PA have statutory formulas that produce a specific dollar amount. These are the most predictable.
Cap-Only States (~4)
TX, FL, MA, LA set a maximum amount or percentage but no minimum. The court decides the actual amount up to the cap.
Local Formula States (~5)
CA, MI, VA, NV, KS have county-level guidelines used in practice but not codified in state law.
Discretion States (~36)
Most states give judges broad discretion using statutory factors like income, marriage length, health, and earning capacity.
2. Formula States: NY, IL, NH, CO, PA
New York
New York has the most detailed statutory formula (DRL Section 236B):
Without child support: Calculate both (a) 30% of payor's income minus 20% of payee's income, and (b) 40% of combined income minus payee's income. The award is the lower of the two.
With child support: Same structure but with 20%/25% instead of 30%/20%.
Income cap: $241,000/year (effective March 2026). Duration: 15-50% of marriage length depending on how long the marriage lasted.
Illinois
Formula: 33.33% of payor's net income minus 25% of payee's net income
Cannot exceed 40% of combined net income. Applies only when combined gross is under $500,000.
Duration multipliers: 20% of marriage length for 0-5 years, scaling up to 80% for 15-20 years. Marriages over 20 years may get indefinite support.
New Hampshire
Formula: 23% of the difference between parties' gross incomes
Cannot exceed payee's reasonable need. Maximum duration: 50% of the marriage length. The 23% rate was set post-TCJA (would revert to 30% if alimony becomes tax-deductible again).
Colorado
Advisory formula: 40% of higher earner's AGI minus 50% of lower earner's AGI
Tiered adjustment: multiply result by 80% (combined under $10K/mo) or 75% ($10K-$20K/mo). Applies under $240K combined annual.
Duration scales from 31% of marriage length at 3 years to 50% at 12.5+ years. Minimum 3 years of marriage required.
Pennsylvania
Important: PA's formula applies only to spousal support and APL (during proceedings) — NOT post-divorce alimony.
Without children: 33% of payor's net minus 40% of payee's net
With children: 25% of payor's net minus 30% of payee's net (reduced because child support is also being paid)
3. Cap States: TX, FL, MA, LA
Texas
One of the most restrictive states for alimony. Must meet strict eligibility: marriage of 10+ years AND inability to self-support, or disability/domestic violence.
Cap: Lesser of $5,000/month or 20% of payor's gross income
Duration: 10-20 year marriage = max 5 years. 20-30 years = max 7 years. 30+ years = max 10 years.
Florida (Reformed 2023)
Permanent alimony was eliminated effective July 1, 2023 (SB 1416). Now only durational, rehabilitative, and bridge-the-gap alimony are available.
Cap: 35% of the difference in net incomes
Duration: Under 10 years = max 50% of marriage. 10-20 years = max 60%. 20+ years = max 75%. No durational alimony for marriages under 3 years.
Massachusetts
Cap: 30-35% of the difference in gross incomes (practitioners often use 22-28% post-TCJA since alimony is no longer tax-deductible)
Duration: 50% of marriage (0-5 yrs), 60% (5-10), 70% (10-15), 80% (15-20). 20+ years: court discretion. Terminates at recipient's remarriage or either party reaching Social Security retirement age (currently 67).
Louisiana
Cap: One-third (1/3) of payor's net income. Exception for domestic violence cases. Ends at remarriage or death.
4. Local Formulas: CA, MI, VA, NV
These states have no statutory formula, but local courts have developed informal guidelines that are widely used — especially for temporary (pendente lite) support:
| State | Local Formula | Scope |
|---|---|---|
| California | 40% payor net - 50% payee net (Santa Clara guideline) | Temporary support only |
| Michigan | 25% payor income - 35% recipient income (Oakland County) | Starting point, not binding |
| Virginia | 27% higher gross - 50% lower gross (no kids); 26%/58% (kids) | Pendente lite only |
| Nevada | Tonopah formula: cumulative % based on marriage, age, education | Clark County practice |
| Kansas | 20% of income difference (Johnson County) | Local guideline only |
California's 10-Year Rule
A widely misunderstood rule: for marriages of 10+ years, the court retains jurisdiction over spousal support indefinitely. This does NOT guarantee lifetime alimony — it means the court can revisit the issue at any time. For marriages under 10 years, the guideline is support lasting approximately half the marriage length.
5. How Long Alimony Lasts
Duration varies dramatically by state. Here are the key patterns:
| State | Duration Rule |
|---|---|
| Texas | 5-10 years max (depending on marriage length) |
| Indiana | Max 3 years (rehabilitative only) |
| Florida | 50-75% of marriage (no permanent) |
| Massachusetts | 50-80% of marriage; ends at retirement age |
| New Hampshire | Max 50% of marriage length |
| Utah | Cannot exceed marriage length |
| Kansas | Max 121 months (10 years, 1 month) |
| New Jersey | Under 20 yrs: cannot exceed marriage. 20+ yrs: open durational |
| California | Under 10 yrs: ~half marriage. 10+ yrs: indefinite jurisdiction |
6. Recent Alimony Reforms
Several states have significantly reformed their alimony laws in recent years, generally moving toward shorter durations and eliminating permanent alimony:
Florida (2023) — SB 1416
Eliminated permanent alimony entirely. Created durational caps (50-75% of marriage). Rehabilitative capped at 5 years. Bridge-the-gap limited to 2 years. Payors can petition to reduce at reasonable retirement age.
Massachusetts (2011) — Alimony Reform Act
Created four alimony types. Capped duration at 50-80% of marriage length. Alimony terminates at payor's Social Security retirement age (67). Cohabitation of 3+ months can trigger termination.
New Jersey (2014) — Bill A-845
Renamed “permanent alimony” to “open durational alimony.” For marriages under 20 years, duration generally cannot exceed marriage length. Retirement creates presumptive termination.
Arizona (2025) — Revised Guidelines
New advisory guidelines effective September 2025. Income adjustment threshold raised from $100K to $175K. Max duration for 16+ year marriages increased to 12 years or 50% of marriage. Rule of 65: age + marriage years ≥ 65 may qualify for indefinite support.
Utah (2024) — HB 220
Codified that alimony duration cannot exceed the length of the marriage. Recipients must demonstrate earnest efforts to become self-supporting.
7. Tax Treatment of Alimony
The Tax Cuts and Jobs Act of 2017 fundamentally changed how alimony is taxed:
Agreements After Dec 31, 2018
- Not deductible for the payor
- Not taxable income for the recipient
Agreements Before Jan 1, 2019
- Deductible for the payor
- Taxable income for the recipient
- Unless modified to adopt new rules
This change significantly impacts the effective cost of alimony. Before TCJA, a payor in the 32% tax bracket paying $3,000/month in alimony effectively paid ~$2,040 after the tax deduction. Now they pay the full $3,000. New Hampshire's 23% formula rate (vs. 30% pre-TCJA) directly accounts for this change.
8. Real-World Examples
Example 1: New York — 15-year marriage, no child support
Higher earner: $10,000/month gross. Lower earner: $4,000/month gross.
- Formula (a): 30% x $120,000 - 20% x $48,000 = $36,000 - $9,600 = $26,400/yr
- Formula (b): 40% x $168,000 - $48,000 = $67,200 - $48,000 = $19,200/yr
- Award = lower: $19,200/yr = $1,600/month
- Duration: ~4-6 years (30-40% of 15 years)
Example 2: Illinois — 10-year marriage
Higher earner: $8,000/month net. Lower earner: $2,500/month net.
- 33.33% x $8,000 = $2,667
- 25% x $2,500 = $625
- Raw: $2,667 - $625 = $2,042
- 40% cap: 40% x $10,500 = $4,200 (not triggered)
- Monthly alimony: $2,042
- Duration: 40% x 10 years = 4 years
Example 3: Texas — 25-year marriage
Higher earner: $12,000/month gross. Lower earner: $2,000/month gross.
- 20% of $12,000 = $2,400
- Cap: $5,000/month
- Maximum alimony: $2,400/month (20% is less than $5K cap)
- Duration: max 7 years (20-30 year marriage category)
Example 4: Florida — 12-year marriage (post-2023 reform)
Higher earner: $7,000/month net. Lower earner: $3,000/month net.
- Net income difference: $4,000
- 35% cap: $1,400/month maximum
- Actual award: up to $1,400/month (court determines actual amount)
- Duration: max 60% of 12 years = 7.2 years
- No permanent alimony available (eliminated 2023)
The Bottom Line
Alimony is far less predictable than child support. The same couple could see dramatically different outcomes depending on their state — from $0 in Texas (if married under 10 years) to thousands per month in New York or California. The trend across the country is toward shorter durations, elimination of permanent alimony, and more formula-based approaches.
Use our Alimony Calculator for a quick estimate, then consult a family law attorney. The calculator shows you the formula your state uses and how it applies to your situation, but judges have significant discretion to deviate based on circumstances no calculator can capture.
Disclaimer: This guide and calculator provide estimates for informational purposes only. They are not legal advice. Actual alimony awards are determined by courts and may differ from these estimates.
Frequently Asked Questions
How much alimony will I pay?
Alimony depends on your state, both spouses' incomes, marriage length, and many other factors. States with formulas (like New York and Illinois) produce specific amounts. In discretion states, judges consider income disparity, earning capacity, age, health, and standard of living during the marriage. Use our calculator for a state-specific estimate.
Is alimony always awarded in divorce?
No. Alimony is not automatic. It's typically awarded when there is a significant income disparity between spouses and the lower-earning spouse cannot maintain a reasonable standard of living independently. Short marriages (under 5 years) with no children and both spouses working rarely result in alimony. Texas and Indiana are particularly restrictive.
Can alimony be avoided?
A prenuptial or postnuptial agreement can limit or waive alimony if properly drafted and both parties had independent legal counsel. Without an agreement, the court decides based on state law and the circumstances of the divorce. Some states allow couples to agree on alimony terms in a settlement, which may differ from what a court would order.
Does alimony end if my ex remarries?
In most states, yes — alimony automatically terminates when the recipient remarries. Many states also allow reduction or termination if the recipient cohabitates with a new partner (Massachusetts requires cohabitation of 3+ months). Lump-sum alimony and some contractual agreements survive remarriage.
Is alimony tax-deductible?
Not for divorce agreements executed after December 31, 2018. Under the Tax Cuts and Jobs Act, alimony is no longer deductible for the payor or taxable for the recipient. Agreements from before 2019 retain the old tax treatment unless modified to adopt the new rules.
What happens if I can't afford alimony payments?
You can petition the court for a modification based on a substantial change in circumstances (job loss, disability, retirement). Until modified, the original order remains in effect — you cannot unilaterally stop paying. Falling behind can result in wage garnishment, contempt of court, and other enforcement actions.
How is alimony different from child support?
Child support is for the children's expenses and is determined by specific formulas in every state. Alimony is for the lower-earning spouse's support and is more discretionary. Child support typically ends at age 18, while alimony duration varies. They are calculated separately, though some state formulas adjust alimony when child support is also being paid.
Which states recently reformed their alimony laws?
Florida eliminated permanent alimony in 2023. Massachusetts capped duration and added retirement-age termination in 2011. New Jersey renamed permanent alimony to 'open durational' and capped shorter marriages in 2014. Arizona revised its advisory guidelines in 2025. Utah codified that duration cannot exceed marriage length in 2024. New Hampshire adopted its 23% formula in 2019.