How Long Does Alimony Last in New Hampshire?
Last reviewed: March 2026
New Hampshire uses statutory formula to determine alimony duration. Maximum duration = 50% of the length of the marriage (Source: RSA 458:19-a)
How New Hampshire determines alimony duration
New Hampshire is an equitable distribution state. New Hampshire refers to spousal support as “alimony”. New Hampshire has a statutory formula that determines the maximum duration of alimony based on the length of the marriage.
Source: RSA 458:19-a
Term or reimbursement alimony based on circumstances.
Estimated alimony duration by marriage length
The table below shows estimated maximum alimony duration for different marriage lengths in New Hampshire.
| Marriage length | Est. max alimony duration |
|---|---|
| 5 years | 2.5 years |
| 10 years | 5 years |
| 15 years | 7.5 years |
| 20 years | 10 years |
| 25 years | 12.5 years |
When does alimony end in New Hampshire?
Alimony in New Hampshire typically ends when:
- The court-ordered term expires
- The recipient spouse remarries
- Either party dies
- A court modifies or terminates the order due to a significant change in circumstances
In some cases, cohabitation with a new partner may also be grounds for modification or termination of alimony in New Hampshire.
Is alimony taxable in New Hampshire?
For divorce agreements finalized after December 31, 2018, alimony is not deductible by the payer and not taxable to the recipient under federal tax law (Tax Cuts and Jobs Act). This applies in New Hampshire and all other states.
Will your New Hampshire alimony actually cover you long-term?
Enter your income, assets, and support terms. Get a year-by-year projection showing your after-tax cash flow and whether your settlement sustains you after alimony ends.
Pro models your after-tax cash flow year-by-year with New Hampshire-specific rules. Interactive sliders let you test different scenarios.
From uncertainty to clarity in 3 steps
No account required. No credit card. Just your numbers.
Enter your numbers
Settlement amount, income, expenses, alimony, house — takes about 2 minutes. Everything runs privately in your browser.
See the projection
Get a year-by-year chart showing your net worth from now through age 100. Green, yellow, or red — you'll know where you stand instantly.
Model & export
Test different settlement terms to find which saves you the most money, compare offers side-by-side, and export a report for your attorney.
Every projection is deterministic — same inputs always produce the same outputs. Results are estimates based on the assumptions you provide.
See what a Pro analysis looks like
We built a complete Pro analysis for a fictional person named Sarah. Explore every section — charts, what-if scenarios, risk timeline, negotiation leverage — so you can see what’s included before running your own numbers.
You don’t need a $5,000 CDFA retainer to understand your own numbers
Start with the free projection. If the numbers raise questions you can’t answer, upgrade to Pro for $19 — one-time, no subscription — and discover which settlement terms could save you thousands.
Not financial or legal advice. DivorceSmart is an educational planning tool. Always consult a qualified attorney and financial advisor before making settlement decisions.