Alimony Calculator 2026 — Estimate Spousal Support Payments
Alimony (spousal support/maintenance) has no universal formula — but judges use similar income-difference models. Not knowing your estimated number before settlement negotiations means leaving money on the table, or agreeing to pay more than necessary.
⚠️ Critical 2026 Tax Law — Read Before You Negotiate
For divorces finalized after December 31, 2018: alimony is NOT deductible by the payer and NOT taxable for the recipient (TCJA). A $2,500/month payment that previously cost ~$1,750/month net now costs the full $2,500/month. This changed negotiation dynamics significantly.
📐 Alimony Estimate Formula
Income Difference = Higher Income − Lower Income
Rate by marriage length:
Under 5 years → 25% of difference
5 to 10 years → 30% of difference
10 to 20 years → 35% of difference
Over 20 years → 40% (possibly permanent)
Monthly Alimony = Difference × Rate
Duration (years) = Marriage Years × 0.3–0.4
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Total Payments = Monthly × Duration (months)
📌 Real Example — New Jersey, 14 Years
David: $10,000/mo | Linda: $2,200/mo | 14 years married
- Difference: $7,800/mo
- Rate (35%): $7,800×35% = $2,730/mo
- Duration: 14×0.4 = ~5.6 years
- Total: $2,730×67 months = ~$182,910
Types of Alimony
- Rehabilitative: Most common. Time-limited to help lower earner become self-supporting.
- Permanent: Long marriages (20+ years). Florida eliminated this in 2023. Still available in CA, NY, NJ.
- Bridge-the-Gap (Florida): Max 2 years, non-modifiable, helps transition to single life.
- Reimbursement: Compensates spouse who funded the other's education or career.
- Lump-Sum: Single payment — cleaner but usually non-modifiable.
Frequently Asked Questions
Is alimony tax deductible in 2026?
No. Under TCJA, for divorces after December 31, 2018, alimony is NOT deductible by the payer and NOT taxable for the recipient. If your divorce was finalized before January 1, 2019, the old rules still apply — payer deducts, recipient pays tax.
How long does alimony last?
Short marriages (under 5 years): 1–2 years. Medium (5–15 years): roughly 30–40% of the marriage length. Long (20+ years): potentially permanent in states that still allow it. Florida eliminated permanent alimony in 2023.
Does alimony end if I remarry?
Yes — recipient's remarriage automatically terminates alimony in virtually all states. Cohabitation with a new partner can also be grounds to reduce or terminate in many states, requiring a court motion. Payer's remarriage typically does NOT end the obligation.
Can alimony be modified after it's set?
Yes, in most cases, if you show a substantial change in circumstances — job loss, disability, retirement, or significant income change. Some agreements have non-modifiable clauses. Always have an attorney review what you sign.
What if my spouse hides income?
Courts can subpoena tax returns, bank statements, and business records. A forensic accountant can uncover hidden income. Courts can impute income — assigning what someone should earn based on skills and experience. Penalties for income hiding can be severe.