In New Hampshire, SSDI (Social Security Disability Insurance) counts as gross income for child support under N.H. Rev. Stat. § 458-C:2, but SSI (Supplemental Security Income) is expressly excluded. When a disabled parent's SSDI generates a derivative benefit paid to the child, that payment can offset the obligation dollar-for-dollar. Filing fees run roughly $250 to $282 as of March 2026.
Key Facts: Child Support and Disability in New Hampshire
| Factor | New Hampshire Rule |
|---|---|
| Filing Fee | $250 (no minor children) / $282 (with minor children), March 2026 |
| Waiting Period | 60-day nisi period before a decree becomes final |
| Residency Requirement | Both spouses domiciled in NH, OR petitioner domiciled + spouse served in-state, OR 1 year domicile — N.H. Rev. Stat. § 458:5 |
| Grounds | Irreconcilable differences (no-fault) or fault grounds under N.H. Rev. Stat. § 458:7 |
| Property Division Type | Equitable distribution |
| Support Model | Income Shares — N.H. Rev. Stat. § 458-C:3 |
As of March 2026. Verify all fees with your local Circuit Court Family Division clerk.
Is SSDI Counted as Income for Child Support in New Hampshire?
Yes. SSDI is counted as gross income for child support disability New Hampshire calculations under N.H. Rev. Stat. § 458-C:2, which defines gross income to include "disability benefits" alongside workers' compensation, veterans' benefits, and unemployment. A parent receiving $1,800 monthly in SSDI has that full amount added to the income-shares calculation. This is the single most important rule disabled parents must understand.
New Hampshire's child support statute defines gross income broadly and deliberately. The definition in N.H. Rev. Stat. § 458-C:2 captures income from self-employment, alimony, pensions, bonuses, and "payments from other government programs" — a category that expressly includes disability benefits. New Hampshire courts have interpreted this language consistently with federal law, holding that even federal veterans' disability benefits may be included as income for child support purposes. For a disabled parent, this means SSDI is not shielded from the support calculation simply because it originates from a disability. The court treats a $2,000 SSDI check the same way it treats $2,000 in wages when combining both parents' incomes under the income-shares model.
Does SSI Count as Income for Child Support in New Hampshire?
No. Supplemental Security Income (SSI) is expressly excluded from gross income under N.H. Rev. Stat. § 458-C:2, which carves out "public assistance programs" including SSI, food stamps, aid to the permanently and totally disabled, and general assistance. A parent whose only income is $943 monthly in SSI cannot have that benefit counted toward a support obligation.
The distinction between SSDI and SSI is the pivotal issue in disability income child support cases. SSDI is an earned benefit funded by a worker's own payroll-tax contributions, so New Hampshire treats it as replacement income. SSI, by contrast, is a means-tested public assistance program for people with limited income and resources, and the statute deliberately excludes it. This exclusion protects the poorest disabled parents from support orders that would push them below subsistence. Beyond exclusion, N.H. Rev. Stat. § 458-C:2 also provides that a support order assigned to the Department of Health and Human Services is suspended and does not accrue during any period the responsible parent receives SSI benefits under Title XVI of the Social Security Act. A disabled parent on SSI should always confirm their benefit type with the Social Security Administration before any support hearing.
How Do Derivative SSDI Benefits Offset Child Support in New Hampshire?
When a disabled parent's SSDI record generates a derivative (dependent) benefit paid to the child, that payment can offset the parent's child support obligation dollar-for-dollar. In In re Angley-Cook (2004), the New Hampshire Supreme Court held that Social Security dependency benefits constitute a "payment in money" satisfying the obligor's support duty under N.H. Rev. Stat. § 458-C:2.
This credit is one of the most valuable protections for a disabled parent child support obligor. When the Social Security Administration approves an SSDI claim, it often pays an additional "auxiliary" or "dependent" benefit — typically up to 50% of the parent's benefit — directly to each qualifying child. In In re Angley-Cook, the court reasoned that although the benefit is paid to the child, it derives from the parent's own past earnings contributions, so the parent should receive credit against the support obligation. The court noted that allowing the credit does not harm the child, because once the guideline amount is set, the source of payment is immaterial so long as the money is actually received. Critically, the credit is not automatic under the guidelines. A trial court applies it through the deviation mechanism of N.H. Rev. Stat. § 458-C:4, which requires a written finding that strict application of the guidelines would be unjust under the criteria in N.H. Rev. Stat. § 458-C:5. A disabled parent must therefore raise the credit affirmatively and ask the court to document the deviation.
What Is New Hampshire's Self-Support Reserve for Disabled Parents?
New Hampshire's self-support reserve guarantees a disabled obligor retains at least 115% of the federal poverty guideline for one person after paying support. Under N.H. Rev. Stat. § 458-C:3, if a support payment would drop the paying parent's adjusted income below the reserve, the presumptive obligation shrinks to the difference between the reserve and that income, but never below the minimum support order.
The self-support reserve is a lifeline for low-income disabled parents whose only income is SSDI. New Hampshire uses an income-shares model that combines both parents' adjusted gross incomes, locates the combined figure in the state support schedule, and apportions the total between parents in proportion to their incomes. Without a floor, a disabled parent living on a modest SSDI benefit could be ordered to pay support that leaves them unable to survive. The reserve prevents this by ensuring the obligor keeps at least 115% of the federal poverty level. For a disabled parent whose SSDI barely exceeds the reserve, the presumptive support amount may be reduced to only the gap between their income and the reserve — sometimes just a minimum order of a nominal monthly amount. Parents should request that the court perform the reserve calculation and document it, because it is not always applied automatically without a specific request.
How Does Child Support Work When the Child Is Disabled in New Hampshire?
When the child support disabled child scenario arises, New Hampshire courts may extend or increase support beyond the typical termination age of 18 or high-school graduation. Under N.H. Rev. Stat. § 461-A:14 and the special-circumstances provisions of N.H. Rev. Stat. § 458-C:5, a court may order continued support for a child unable to be self-supporting due to disability.
Support for a disabled child follows a different track than the standard guideline calculation. New Hampshire generally terminates child support when a child turns 18 or graduates high school, whichever occurs later, but the guidelines recognize that a severely disabled child may never become self-supporting. N.H. Rev. Stat. § 458-C:5 lists "extraordinary medical, dental, or educational expenses" and "significantly high or low income of the obligee or obligor" among the criteria that justify deviating upward from the presumptive amount. A child with autism, a developmental disability, or a chronic medical condition requiring lifelong care may require support that continues into adulthood. Parents raising a disabled child should document all extraordinary expenses — therapy, medical equipment, specialized education, and in-home care — because these figures support a deviation. Any SSI or SSDI benefits the disabled child receives in their own right are considered when the court weighs the child's independent resources under the special-circumstances analysis.
How Is Disability Income Child Support Calculated in New Hampshire?
New Hampshire calculates disability income child support using the income-shares model in N.H. Rev. Stat. § 458-C:3: combine both parents' adjusted gross incomes (including SSDI), find the total in the state schedule, and apportion it by each parent's income share. SSI is excluded, and derivative SSDI benefits paid to the child reduce the obligation.
The calculation proceeds in defined steps. First, the court determines each parent's gross income, including SSDI but excluding SSI and other listed public-assistance programs. Second, it applies statutory adjustments — deductions for court-ordered support of other children, mandatory retirement, and certain medical costs — to reach adjusted gross income. Third, the combined adjusted income is matched against the state support schedule to find the total obligation for the number of children. Fourth, that total is divided between the parents in proportion to their respective shares of combined income. Fifth, the court checks the self-support reserve to ensure the obligor retains 115% of the poverty level. Finally, if the disabled parent's SSDI generates a derivative benefit to the child, the court may credit that benefit through a documented deviation under N.H. Rev. Stat. § 458-C:4. Each step must be reflected in the court's findings so the order withstands review and modification.
Comparison: SSDI vs. SSI vs. Derivative Benefits in New Hampshire
| Benefit Type | Counted as Parent's Income? | Effect on Support | Governing Rule |
|---|---|---|---|
| SSDI (parent's own) | Yes — full amount | Increases combined income | § 458-C:2 |
| SSI (parent's own) | No — excluded | Order suspended if assigned to DHHS | § 458-C:2 |
| Derivative SSDI (paid to child) | Not income | Dollar-for-dollar credit via deviation | § 458-C:4 |
| Child's own SSI/SSDI | Child's resource | Considered under special circumstances | § 458-C:5 |
| VA disability | Yes — full amount | Increases combined income | § 458-C:2 |
Can You Modify Child Support After Becoming Disabled in New Hampshire?
Yes. A parent who becomes disabled may petition to modify child support in New Hampshire under N.H. Rev. Stat. § 458-C:7, which permits review when there is a substantial change in circumstances or after three years. A job loss due to disability that cuts income from $60,000 to $22,000 in SSDI typically qualifies as a substantial change warranting recalculation.
Disability is one of the clearest grounds for modifying an existing support order. New Hampshire allows a parent to seek modification either by showing a substantial change of circumstances at any time or automatically after three years have passed since the last order, without needing to prove a change. A parent who suffers a stroke, develops a chronic illness, or is injured and can no longer work experiences exactly the kind of income drop the modification statute addresses. The disabled parent should file a motion to modify promptly, because New Hampshire generally does not reduce arrears that accrued before the modification petition was filed — support obligations continue at the old rate until the court acts. Waiting six months to file means six months of support calculated on pre-disability income. The parent should attach the Social Security award letter, medical documentation, and an updated financial affidavit to establish the new income figure and support the requested reduction.