New Hampshire Alimony Calculator (2026)

The guideline is 23% of the difference between the spouses’ gross incomes; the final award is the lesser of that amount or the recipient’s reasonable need, per RSA 458:19-a.

Under current federal law alimony is not tax‑deductible for the payer and is not taxable to the recipient; the 23% figure assumes this treatment and would only change if federal deductibility returns.

The statutory maximum duration is half the length of the marriage, i.e., up to 50% of the marriage’s total months.

Yes. The award is the lesser of the recipient’s reasonable need or the 23% guideline amount.

The reform set the guideline at 23% of the income difference and established the 50% marriage‑length cap; it also includes a contingency to raise the percentage to 30% if alimony becomes federally deductible again.

No. RSA 458:19-a applies statewide, so courts in Manchester, Nashua, Concord and every other county start from the same guideline. Local practice can differ in how judges weigh deviation factors and in typical negotiated outcomes, but the formula on this page is the one used across New Hampshire.