Over Three Decades Of Resolving Family Law Issues In Montana

Do you have to wait 36 months to modify child support?

On Behalf of | Sep 4, 2026 | Child Support |

If your income, parenting arrangement or child-related expenses have changed, waiting three years to revisit your child support order may feel too long. In Montana, you do not always have to wait 36 months.

If the Child Support Services Division (CSSD) handles your case, you may request a review once at least 36 months have passed since the order was entered or last reviewed. You generally do not need to show that your financial or family situation has significantly changed.

What changes could lead to an earlier review?

You may ask CSSD to review the order sooner if your circumstances have changed significantly. The agency gives several examples:

  • A change in the child’s physical custody
  • A change in the child’s daycare or medical expenses
  • A change in the number of children involved
  • A change of at least 30% in either parent’s income

These changes may allow an earlier review, but they do not guarantee a different payment amount. The agency still considers the financial information and circumstances that apply to your case.

What happens after you request a review?

You can obtain a Request for Review packet from the CSSD investigator assigned to your case. The agency reviews the packet, verifies both parents’ financial information and calculates what the payment could be under the Montana Child Support Guidelines.

You and the other parent may correct information, agree to the proposed support amount or request a hearing if you disagree.

Knowing when to revisit your order matters

A change in your job, parenting arrangement or child-related costs can make an existing support order worth another look. Keeping current income and expense records can help you explain what has changed and provide CSSD with accurate information. Because the right process may depend on how your order was issued and what has changed, legal guidance can help you understand which child support modification process applies to your situation.