When Does Child Support End in New Hampshire? (2026 Guide)

In New Hampshire, child support ends when a child turns 18. If the child is still enrolled full-time in high school, a charter school, or a home education program at age 18, support continues until graduation or 2 months after the child turns 19, whichever comes first. Under RSA 461-A:14, support also terminates if the child marries, enlists in the armed services, or is emancipated under RSA 461-B. New Hampshire does not require parents to pay for college expenses, though parents may voluntarily agree to contribute under RSA 461-A:21. Recent legislative changes effective January 1, 2025 (HB 1564) and July 1, 2025 (RSA 461-A:14 amendment) have updated the child support calculation formula and clarified age-based termination rules.

When Does Child Support End in New Hampshire Under RSA 461-A:14?

Child support in New Hampshire terminates automatically when the child reaches age 18 under RSA 461-A:14. No court motion or additional legal action is required for the obligation to end at the statutory termination age. As of the July 1, 2025 amendment, New Hampshire shifted from a completion-of-high-school standard to a clear age-based termination rule with a defined student exception. This change simplified the process for thousands of New Hampshire families paying or receiving child support. The statute identifies four specific termination events: reaching age 18, marriage, enlistment in the armed services, or emancipation under RSA 461-B. Each event terminates the support obligation without requiring a new court order.

The four statutory termination triggers under RSA 461-A:14 are:

• The child reaches age 18 (with the continuing-student exception described below)
• The child marries
• The child becomes a member of the United States armed services
• The child is emancipated by court order under RSA 461-B

When any of these events occurs, the paying parent's child support obligation ends by operation of law. The receiving parent cannot contest termination triggered by one of these four statutory events.

The High School Student Exception: Support Beyond Age 18

New Hampshire extends child support past age 18 if the child is still enrolled full-time in an elementary or secondary school, a charter school, or a home education program under RSA 193-A at the time the child turns 18. Support continues until the child graduates or until 2 months after the child reaches age 19, whichever comes first. This means the maximum possible child support duration in New Hampshire for a typical case is approximately age 19 and 2 months. Once either condition is met (graduation or 2 months past age 19), all child support and educational support obligations terminate automatically without further court action.

Parents should understand these specific rules about the high school extension:

• The child must be enrolled full-time (part-time enrollment does not qualify)
• The extension covers secondary schools, charter schools, and home education programs approved under RSA 193-A
• GED programs do not qualify for the extension under current law
• The paying parent does not need to file a motion to terminate support at the end of the extension period
• The extension applies only to high school education, not college or post-secondary programs

When Does Child Support End for a Child with Disabilities in New Hampshire?

New Hampshire courts may extend child support beyond age 18 for a child with disabilities as defined in RSA 186-C:2, I. The court must find that the child is receiving special education services and that continued support is appropriate given the child's needs. However, no child support order entered or modified after July 9, 2013 may continue past age 21 or past the date the child no longer qualifies for special education, whichever occurs first. This creates a hard cap of age 21 for disability-related child support extensions in New Hampshire. The paying parent may petition the court to terminate support if the child's disability status changes or if special education services end before age 21.

The disability extension requires:

• A qualifying disability under RSA 186-C:2, I (the same definition used for special education eligibility)
• Active enrollment in special education services
• A court order specifically authorizing the extension
• Termination no later than age 21 for orders entered or modified after July 9, 2013

Emancipation and Early Termination of Child Support

A child aged 16 or older may petition for emancipation under RSA 461-B, and a court order of emancipation automatically terminates child support under RSA 461-A:14. New Hampshire enacted its formal emancipation statute on January 1, 2020, establishing a clear legal pathway for minors to seek independence before turning 18. The petitioning minor must prove by clear and convincing evidence that emancipation is appropriate, which is a higher burden than the typical preponderance standard used in most family law proceedings.

The emancipation process in New Hampshire involves these steps:

1. The minor (age 16 or older) files a petition with the Circuit Court Family Division
2. The petition must include the minor's name, address, names and addresses of parents or guardians, and specific facts supporting emancipation
3. The court schedules a hearing and requires personal service of the petition on the minor's parents or guardians
4. At the hearing, the minor must demonstrate by clear and convincing evidence that emancipation is warranted
5. The court issues a limited emancipation order specifying which rights are granted

Rights that may be granted through emancipation under RSA 461-B include:

• The right to receive and manage money and conduct financial affairs
• The right to enter contracts and incur debts
• The right to consent to medical, psychiatric, educational, and social services
• The right to obtain licenses to operate equipment or perform services
• The right to enlist in the military

Does New Hampshire Require Parents to Pay for College?

New Hampshire does not require parents to pay for college or any post-secondary education expenses. RSA 461-A:14 explicitly states that no child support order shall require a parent to contribute to an adult child's college expenses or other educational expenses beyond high school completion. This is a firm statutory prohibition, meaning a judge cannot order college support even if one parent requests it. New Hampshire joins the majority of states that do not compel parents to fund higher education through the child support system.

However, parents may voluntarily agree to share college costs under RSA 461-A:21. A valid college expense agreement must meet these requirements:

• Both parents must sign the agreement
• The court must approve the agreement as part of a stipulated decree
• The agreement must specify the amount, percentage, or formula for contributions
• The agreement must state whether its terms are modifiable or non-modifiable
• Non-modifiable agreements must include a specific dollar amount
• The court will enforce qualifying agreements that meet all statutory requirements

Parents negotiating divorce settlements should carefully consider whether to include a college expense agreement, because once approved by the court, these agreements are enforceable even though the law does not require college support.

2025 Child Support Law Changes Affecting New Hampshire Families

New Hampshire enacted significant child support reforms through HB 1564, signed into law on July 3, 2024, with provisions taking effect on January 1, 2025. The self-support reserve increased from 115% to 130% of the federal poverty level for a single person, providing greater financial protection for the paying parent. The legislation also introduced formal definitions for shared parenting schedules: an "approximately equal parenting schedule" means each parent has the child more than 40% of the time, while a "substantially shared parenting schedule" means each parent has the child more than 35% of the time.

Key changes under HB 1564 (effective January 1, 2025) include:

• Self-support reserve increased from 115% to 130% of the federal poverty level
• New presumption of $0 child support when parents share approximately equal parenting time (each parent has the child more than 40% of the time) and incomes are within 10% of each other
• Courts may deviate from guidelines when parenting time is substantially shared (more than 35%) and incomes are similar
• Formal statutory definitions for shared parenting time thresholds (35% and 40%)

A separate amendment to RSA 461-A:14, effective July 1, 2025, clarified the age-based termination standard. Before this amendment, support continued until the child completed high school or reached age 18, whichever was later. After July 1, 2025, the rule is age 18 with the continuing-student exception extending to graduation or 2 months past age 19.

How New Hampshire Calculates Child Support Under RSA 458-C

New Hampshire uses the Income Shares Model under RSA 458-C to calculate child support, which was enacted in 1988 and last underwent major revision effective July 1, 2013 (HB 597). The model bases support on the combined monthly net income of both parents and the number of children, using a guideline table that sets presumptive support amounts in $100 annual income increments. Both parents' incomes are considered because the model aims to provide the child with the same proportion of parental income the child would have received if the parents lived together.

Net income for child support purposes includes gross income minus these deductions:

• FICA (Social Security and Medicare taxes)
• Federal and state income taxes
• Mandatory retirement contributions
• Health insurance premiums paid for the child
• Existing child support obligations for other children from prior relationships

The New Hampshire Department of Health and Human Services (DHHS) Bureau of Child Support Services publishes the official guidelines and provides an online calculator at dhhs.nh.gov. Courts apply the guideline amount as a presumption, but either parent may argue for a deviation based on factors such as extraordinary medical expenses, educational costs, or the specific needs of the child.

How to Modify or Terminate a Child Support Order in New Hampshire

A parent seeking to modify child support before the automatic termination date must file a Petition to Change Court Order with the Circuit Court Family Division. The filing fee for a divorce or family law petition in New Hampshire is $227 ($225 entry fee plus a $2 parental rights fee). As of March 2026, verify this amount with your local clerk, as fees may change. The petitioning parent must demonstrate a substantial change in circumstances, such as a significant increase or decrease in either parent's income, a change in the child's needs, or a change in the parenting schedule.

For multi-child families, RSA 461-A:14 includes a step-down provision. If a child support order covers multiple children and the court can determine that support will terminate for one child within 3 years, the order may specify the new amount for the remaining children. This adjusted amount takes effect automatically when the older child ages out, avoiding the need for a separate modification petition.

Steps to modify a child support order:

1. Obtain the Petition to Change Court Order form from courts.nh.gov or the clerk's office
2. File the petition with the Circuit Court Family Division that issued the original order
3. Pay the filing fee ($227 as of March 2026) or apply for a fee waiver if you cannot afford the fee
4. Serve the other parent with notice of the petition
5. Attend the hearing and present evidence of the substantial change in circumstances
6. The court applies the current child support guidelines under RSA 458-C to recalculate the appropriate amount

Payment methods accepted by New Hampshire courts include cash, check, money order, or credit card (Visa, MasterCard, Discover). A 3% surcharge applies to all electronic transactions processed through File and Serve or TurboCourt platforms, and to credit card payments at the clerk's window, effective September 3, 2025.

New Hampshire Residency Requirements for Child Support and Divorce

New Hampshire establishes jurisdiction for divorce and child support cases under RSA 458:5 through three pathways. If both spouses are domiciled in New Hampshire, no minimum residency duration is required. If the filing spouse is domiciled in New Hampshire and the other spouse can be personally served within the state, no minimum duration is required. If the filing spouse is domiciled in New Hampshire but the other spouse lives out of state, the filer must have been domiciled in New Hampshire for at least 1 year before filing. Joint petitions or waiver of service may eliminate the 1-year requirement in some out-of-state-spouse situations.

For child support modifications, the court that issued the original order generally retains jurisdiction. If both parents have moved to New Hampshire from another state, they may register the out-of-state order in New Hampshire under the Uniform Interstate Family Support Act (UIFSA) and seek modification in a New Hampshire court.