Quick answer: When does child support end in Montana? At emancipation or high school graduation, whichever is later, but never past the 19th birthday, unless the decree or a written agreement says otherwise. For a child with a disability who is financially dependent on the custodial parent, support does not end because of age.
This Montana child support end date calculator finds the 18th birthday under MCA 40-4-208(5) and the 19th birthday cap for a high school student. Past-due support stays owed, so check the balance in the Montana child support arrears calculator.
When does child support end in Montana? At a glance
| Rule | What Montana says |
|---|---|
| Basic rule | Support ends at emancipation or high school graduation if enrolled, whichever is later, but never past the 19th birthday (MCA 40-4-208(5)) |
| Exceptions | Unless the termination date is extended or knowingly waived by written agreement or by an express provision of the decree (40-4-208(5)) |
| Disabled child | Support is not ended by age if the child has a disability, is financially dependent on the custodial parent and that parent is the primary caregiver, until the court finds otherwise (40-4-208(6)) |
| Child (definition) | Under 18 and not emancipated, self-supporting, married or in the armed forces; under 19 and still in high school; or incapacitated before 18 (40-5-201) |
| Death of the payer | Support does not end; the court may modify, revoke or commute it (40-4-208(7)) |
| Past-due support | Stays owed |
How does the Montana end date work?
- Age 18 and the high school extension. See the Montana child support age limit and the high school extension.
- College and disabled adult children. See child support for college and disabled children in Montana.
- Emancipation and ending the order. See emancipation and whether child support ends automatically in Montana.
What does this end date calculator check?
You enter the child’s birth date and the calculator returns the 18th birthday and the time left from today. If the child will still be in high school at 18, it adds the 19th birthday cap, and it notes the disability rule. It cannot read your decree: if it says otherwise, it controls. To change the amount before it ends, see the Montana child support modification calculator.
Frequently asked questions
At what age does child support end in Montana?
At emancipation or high school graduation, whichever is later, but not past the 19th birthday, unless the decree or a written agreement says otherwise.
Does Montana child support continue through high school?
Yes. If the child is enrolled in high school, support continues to graduation, but not past the 19th birthday.
Does Montana child support cover college?
We found no provision in the sections we read for court-ordered college support; parents can extend the end date by written agreement.
Can Montana child support continue for a disabled adult child?
Yes. It is not ended by age if the child has a disability, is financially dependent on the custodial parent and that parent is the primary caregiver, until the court finds otherwise.
Does Montana child support end automatically?
The statute ends it at the stated point, but ask the court or the department to end income withholding and keep proof of the date.