New Hampshire uses a statutory formula to calculate spousal support: 23% of the difference between the spouses' gross incomes, with a maximum duration of 50% of the marriage length. For a 10-year marriage where one spouse earns $120,000 and the other earns $40,000, the formula yields $18,400 per year ($1,533 per month) for up to 5 years. This 2026 guide explains exactly how much alimony you can expect to receive or pay under RSA 458:19-a, including the calculation formula, judicial adjustment factors, and termination triggers.
Key Facts: New Hampshire Alimony at a Glance
| Factor | Details |
|---|---|
| Filing Fee | $250 (no children) / $282 (with children) |
| Residency Requirement | 1 year (or both spouses in NH) |
| Formula | 23% of gross income difference |
| Maximum Duration | 50% of marriage length |
| Grounds | No-fault (irreconcilable differences) |
| Property Division | Equitable distribution |
| Termination Triggers | Remarriage, cohabitation, payor retirement |
| Modification Standard | Substantial and unforeseeable change |
How New Hampshire Calculates Alimony: The 23% Formula
New Hampshire calculates term alimony using a statutory formula: 23% of the difference between the parties' gross incomes, subject to a cap of the payee's reasonable need. Under RSA 458:19-a, the court applies this formula unless justice requires an adjustment. The 23% figure was adopted in 2019 to account for the federal tax law change that eliminated alimony deductibility for payors.
The calculation works as follows:
- Determine each spouse's gross income
- Subtract the lower-earning spouse's income from the higher-earning spouse's income
- Multiply the difference by 0.23 (23%)
- Compare the result to the payee's reasonable need and award the lesser amount
Practical Calculation Example
Consider a New Hampshire couple divorcing after 12 years of marriage:
| Income Factor | Higher Earner | Lower Earner |
|---|---|---|
| Annual Gross Income | $150,000 | $50,000 |
| Child Support Paid | -$12,000 | N/A |
| Adjusted Gross | $138,000 | $50,000 |
Step-by-step calculation:
- Income difference: $138,000 - $50,000 = $88,000
- Formula amount: $88,000 × 0.23 = $20,240 annually ($1,687 per month)
- Maximum duration: 12 years × 50% = 6 years
If the lower-earning spouse's documented reasonable need is $2,500 per month and they earn $4,167 monthly, their unmet need is approximately $1,833 per month. The court would award $1,687 monthly (the formula amount) because it is less than the reasonable need.
Duration Limits: How Long Alimony Lasts in New Hampshire
New Hampshire caps term alimony at 50% of the marriage length under RSA 458:19-a, III. A 20-year marriage could yield a maximum of 10 years of alimony; a 6-year marriage would cap at 3 years. This statutory duration limit took effect January 1, 2019, and applies to all divorce petitions filed after that date.
| Marriage Length | Maximum Alimony Duration |
|---|---|
| 5 years | 2.5 years |
| 10 years | 5 years |
| 15 years | 7.5 years |
| 20 years | 10 years |
| 30 years | 15 years |
The court may adjust the duration if justice requires, but the burden falls on the party seeking an adjustment to prove special circumstances such as disability, chronic illness, or significant financial dependency.
Three Types of Alimony in New Hampshire
New Hampshire law under RSA 458:19 recognizes three distinct types of alimony, each serving a different purpose and following different rules.
Temporary Alimony
Temporary alimony provides periodic support during the pendency of divorce proceedings, ending on the effective date of the final decree. Courts award temporary alimony when one spouse demonstrates immediate financial need and the other spouse has the ability to pay. Temporary alimony does not count toward the 50% duration limit unless the court finds it was of unusually long duration, typically exceeding 18-24 months.
Term Alimony
Term alimony constitutes the most common form of post-divorce support in New Hampshire, calculated using the 23% formula and subject to the 50% duration cap. Term alimony begins after the final decree takes effect and continues until the earlier of: the specified end date, the payee's remarriage, the payee's cohabitation, or the payor's retirement at full Social Security retirement age (currently 67 for those born in 1960 or later).
Reimbursement Alimony
Reimbursement alimony compensates a spouse for economic or non-economic contributions to the other spouse's financial resources, such as supporting a spouse through medical school or professional training. New Hampshire law caps reimbursement alimony at 5 years from the final decree date under RSA 458:19-a, VIII, and it cannot be modified except by agreement of the parties.
Factors That Justify Alimony Adjustments
While the 23% formula provides the starting point, New Hampshire courts may adjust the amount or duration when justice requires. Under RSA 458:19-a, IV, the party seeking an adjustment bears the burden of proof and must demonstrate special circumstances.
Special circumstances justifying adjustment include:
- Health conditions including disability, chronic mental illness, or severe physical illness that affects earning capacity
- The degree and duration of financial dependency where one spouse sacrificed career advancement for the marriage
- Vocational skills, occupation, and present and future employability of both parties
- Voluntary unemployment or underemployment by either party
- Special needs of a minor or adult child of the parties requiring ongoing care
- Property distribution under the divorce decree that affects the parties' financial positions
New Hampshire courts scrutinize voluntary unemployment or underemployment carefully. A spouse who reduces income without justification may have income imputed based on earning capacity rather than actual earnings.
What Counts as Gross Income for Alimony Calculations
New Hampshire defines gross income broadly under RSA 458:19, II to include all income from any source, whether earned or unearned. The comprehensive definition ensures accurate calculation of the 23% formula differential.
Income sources included in gross income calculations:
- Wages, salary, commissions, tips, and bonuses
- Self-employment income and business profits
- Investment income including dividends, interest, and capital gains
- Rental income (net of expenses)
- Retirement benefits, pensions, and annuities
- Social Security benefits
- Trust income and lottery winnings
- Disability benefits and workers' compensation
- Government program payments
Important adjustments reduce gross income before applying the formula: child support amounts ordered and actually paid (including support for the parties' joint children), and costs for health insurance coverage or other specified expenses paid for the benefit of the other party.
Automatic Termination Triggers
New Hampshire law establishes three automatic termination events for alimony under RSA 458:19-aa. These triggers operate by law without requiring court modification, providing certainty to both payors and payees.
Remarriage
Alimony terminates automatically when the recipient spouse remarries, unless the original order was based on an agreement providing otherwise. The payor must still file a motion to formally terminate payments, but the court will grant termination as of the remarriage date.
Cohabitation
Alimony terminates when the recipient cohabitates with an unrelated adult in a marriage-like relationship. New Hampshire courts evaluate cohabitation by examining factors including: living together continuously in a primary residence, sharing expenses, economic interdependence, joint ownership of property or accounts, intimate relationship, and holding themselves out as a couple to third parties.
Payor Retirement
Alimony terminates when the payor reaches full Social Security retirement age (67 for those born in 1960 or later) or actually retires, whichever is later. The payor must provide 60 days' advance notice of retirement, which courts presume to be reasonable notice. The payor's ability to work beyond full retirement age does not by itself justify extending alimony.
In exceptional cases, the court may extend alimony past retirement up to an amount that equalizes the parties' Social Security benefits, but this requires a specific finding that justice demands continuation.
Modifying Alimony After Divorce
New Hampshire allows modification of term alimony upon showing a substantial and unforeseeable change in circumstances, proven by clear and convincing evidence under RSA 458:19-aa. This high evidentiary standard reflects the law's preference for finality in divorce judgments.
Changes that may warrant modification:
- Job loss or significant involuntary income reduction
- Serious illness or disability affecting earning capacity
- Substantial increase in the payee's income or assets
- Changed circumstances of minor children requiring increased support
The modification request must be filed while the alimony order remains in effect. Courts will not retroactively modify alimony for periods before the motion was filed. Reimbursement alimony cannot be modified except by agreement of the parties.
Reinstatement After Termination
New Hampshire provides a unique reinstatement mechanism under RSA 458:19-aa, V for alimony terminated due to cohabitation or remarriage. If the payee's cohabitation relationship ends or a subsequent marriage ends in divorce, the payee may request reinstatement within 5 years of the termination order's effective date.
The court may reinstate the original alimony award upon finding the qualifying event has occurred. However, if the original order specified an end date, reinstatement cannot extend beyond that date. This provision balances finality with recognition that cohabitation relationships may dissolve.
Tax Implications of New Hampshire Alimony
For divorces finalized after December 31, 2018, alimony payments are not deductible by the payor and not taxable income to the recipient under federal tax law. The 2017 Tax Cuts and Jobs Act eliminated the historic alimony deduction, fundamentally changing alimony economics. New Hampshire's 23% formula (rather than the pre-2019 30% formula) specifically accounts for this tax treatment.
New Hampshire imposes no state income tax on wages or alimony, making the state relatively favorable for alimony recipients compared to high-tax states. Recipients pay zero state tax on alimony regardless of when the divorce occurred.
| Tax Treatment | Pre-2019 Divorces | Post-2018 Divorces |
|---|---|---|
| Payor Federal Deduction | Yes | No |
| Payee Federal Income | Taxable | Not Taxable |
| NH State Tax | None | None |
| Formula Percentage | 30% | 23% |
Filing Fees and Court Costs
The filing fee for divorce in New Hampshire is $250 without minor children and $282 with minor children as of April 2026. Electronic payments incur an additional 3% processing surcharge. Fee waivers are available for individuals whose household income falls at or below 125% of federal poverty guidelines.
| Cost Category | Amount |
|---|---|
| Divorce Filing (no children) | $250 |
| Divorce Filing (with children) | $282 |
| Motion Filing | $85 |
| Modification Petition | $135-$225 |
| Child Impact Program | ~$50 per person |
| Service of Process | $30-$75 |
| Mediation (hourly) | $150-$400 |
Uncontested divorces where spouses agree on all terms typically cost $700-$6,000 total depending on whether parties use online services or attorneys. Contested divorces involving disputes over alimony, property, or custody average $15,000-$30,000 in New Hampshire.
Residency Requirements for Filing
New Hampshire permits divorce filing under three alternative jurisdictional bases set forth in RSA 458:5. Understanding these requirements helps determine where and when you can file.
You may file for divorce in New Hampshire if:
- Both spouses are domiciled in New Hampshire at the time of filing (no minimum duration required)
- You reside in New Hampshire and your spouse can be personally served within the state (no minimum duration required)
- You have resided in New Hampshire for at least one year before filing (required when spouse lives out of state and cannot be served in NH)
The one-year residency requirement applies only when the petitioner is the sole New Hampshire resident and the other spouse cannot be personally served within the state.
Uncontested vs. Contested Alimony Disputes
The path to resolving alimony significantly affects both timeline and cost. New Hampshire strongly encourages settlement through mediation before trial.
| Factor | Uncontested | Contested |
|---|---|---|
| Timeline | 2-3 months | 8-18 months |
| Average Cost | $700-$6,000 | $15,000-$30,000 |
| Court Appearances | 1-2 | Multiple |
| Mediation Required | Often | Yes, before trial |
| Formula Applied | By agreement | By court order |
Joint petitions where both spouses file together streamline the process and eliminate service of process requirements. Spouses who agree on alimony terms can incorporate their agreement into the divorce decree, which the court will approve unless the terms are unconscionable.
How to Estimate Your Alimony Amount
To estimate how much alimony you might receive or pay in New Hampshire, follow this step-by-step calculation process based on the statutory formula.
Step 1: Calculate each spouse's gross annual income using the broad definition under RSA 458:19
Step 2: Subtract any child support amounts ordered and actually paid from the payor's gross income
Step 3: Add child support for joint children to the payee's income
Step 4: Calculate the adjusted income difference
Step 5: Multiply the difference by 0.23 to get the formula amount
Step 6: Compare to the payee's documented reasonable need (monthly budget minus income)
Step 7: The lower of the two figures is the presumptive alimony amount
Step 8: Calculate maximum duration as 50% of the marriage length
For a marriage of 14 years where the higher-earning spouse earns $200,000 gross annually and the lower-earning spouse earns $60,000, the calculation yields: ($200,000 - $60,000) × 0.23 = $32,200 annually or $2,683 monthly, for a maximum of 7 years.
Frequently Asked Questions About New Hampshire Alimony
How much alimony will I get in New Hampshire?
New Hampshire calculates term alimony at 23% of the difference between spouses' gross incomes under RSA 458:19-a. For example, if your spouse earns $100,000 and you earn $40,000, the formula yields $13,800 annually ($1,150 monthly). The court awards the lesser of this amount or your documented reasonable need.
How long does alimony last in New Hampshire?
New Hampshire limits term alimony to a maximum of 50% of the marriage length under RSA 458:19-a, III. A 10-year marriage caps at 5 years of alimony; a 20-year marriage caps at 10 years. This statutory limit took effect January 1, 2019, for all cases filed after that date.
Does cohabitation end alimony in New Hampshire?
Yes, alimony automatically terminates when the recipient cohabitates with an unrelated adult in a marriage-like relationship under RSA 458:19-aa. Courts examine factors including shared residence, expense sharing, economic interdependence, joint property ownership, and whether the couple holds themselves out publicly as partners.
Can I get alimony if I cheated on my spouse?
New Hampshire is a no-fault divorce state, and adultery does not bar a spouse from receiving alimony under current law. The court focuses on financial factors including income disparity, need, and ability to pay rather than marital misconduct when determining alimony awards under RSA 458:19-a.
Does retirement end my alimony obligation?
Alimony terminates when the payor reaches full Social Security retirement age (67 for those born in 1960 or later) or actually retires, whichever is later, under RSA 458:19-aa, III. The payor must provide 60 days' advance notice. The ability to work beyond retirement age does not by itself justify extending alimony.
Is alimony taxable in New Hampshire?
For divorces finalized after December 31, 2018, alimony is not taxable income to the recipient under federal law, and New Hampshire has no state income tax. The payor cannot deduct alimony payments. This tax treatment is why New Hampshire uses the 23% formula rather than the pre-2019 30% formula.
How do I modify alimony in New Hampshire?
You must file a motion demonstrating a substantial and unforeseeable change in circumstances, proven by clear and convincing evidence under RSA 458:19-aa. Qualifying changes include involuntary job loss, serious illness, or significant income changes. File the motion before the current order expires.
What is reimbursement alimony in New Hampshire?
Reimbursement alimony compensates a spouse for contributions to the other's financial resources, such as supporting a spouse through professional school. Under RSA 458:19-a, VIII, reimbursement alimony is capped at 5 years and cannot be modified except by agreement.
Can alimony be reinstated after termination?
Yes, if alimony was terminated due to cohabitation or remarriage, the payee may request reinstatement within 5 years under RSA 458:19-aa, V if the cohabitation ends or the subsequent marriage ends in divorce. Reinstatement cannot extend beyond the original order's end date if one was specified.
What if my spouse hides income to reduce alimony?
New Hampshire courts can impute income to a spouse who is voluntarily unemployed or underemployed. The court examines earning capacity, work history, and reasons for reduced income. Imputed income calculations use the spouse's realistic earning potential rather than artificially reduced actual earnings.