How to change child support in Wyoming

How and when to ask for a new amount, with a review letter.

Checked against official sources: Oct 25, 2026.

Short answer

To modify an order means to change the amount by a new order. If the order is more than 6 months old (or not adjusted in the last 6 months), any party can ask for a review if the guideline amount would change by 20% or more per month; that counts as a change of circumstances.

Agency review
Every 3 years if a parent asks (federal law)
First form
Child Support Modification packet - Petitioner (Wyoming Judicial Branch)

When Wyoming allows a change

If the order is more than 6 months old (or not adjusted in the last 6 months), any party can ask for a review if the guideline amount would change by 20% or more per month; that counts as a change of circumstances. You can also ask at any time for a substantial change of circumstances. Every 3 years, either parent can ask for a review without showing any change. Starting POWER (TANF), Medicaid, SNAP or SSI is a substantial change. Support cannot be changed for past months, except by agreement or back to the date the other side was served with the petition. (W.S. 20-2-311(a), (d))

Law: W.S. 20-2-311(a), (d)

Can I ask for a change? Check your situation

Wyoming's rule: If the order is more than 6 months old (or not adjusted in the last 6 months), any party can ask for a review if the guideline amount would change by 20% or more per month; that counts as a change of circumstances. You can also ask at any time for a substantial change of circumstances. Every 3 years, either parent can ask for a review without showing any change. Starting POWER (TANF), Medicaid, SNAP or SSI is a substantial change. Support cannot be changed for past months, except by agreement or back to the date the other side was served with the petition. (W.S. 20-2-311(a), (d))

Law: W.S. 20-2-311(a), (d)

Until a new order is made, the current amount is still owed. A change can count only from the date the other parent gets notice of your request, so ask soon.

Law: 42 U.S.C. 666(a)(9)

How to ask in Wyoming: Ask your local child support office for a review (you need an open case), or file the court's Child Support Modification packet yourself (Petition for Modification of Child Support and Judgment for Arrears) in district court.

How a change is made in Wyoming

Ask your local child support office for a review (you need an open case), or file the court's Child Support Modification packet yourself (Petition for Modification of Child Support and Judgment for Arrears) in district court.

Write to the child support agency to ask for a review: Ask the agency to review (change) your order

Jail, prison and support

State guidelines may not treat time in jail or prison as choosing not to work, when support is set or changed.

Law: 45 CFR 302.56(c)(3)

In nearby states

What to do now in Wyoming

  1. Read your current order

    Find the date and the amount on the order.

  2. See if a change is allowed

    The rule in Wyoming: If the order is more than 6 months old (or not adjusted in the last 6 months), any party can ask for a review if the guideline amount would change by 20% or more per month; that counts as a change of circumstances.

  3. Collect papers

    Bring proof of the change, such as pay stubs or a layoff notice.

  4. Ask the agency or the court

    Request a review from Wyoming Child Support Program, Wyoming Department of Family Services (307-777-6948) · Apply online

  5. Talk to legal aid

    Free help: Legal Aid of Wyoming.

Free help in Wyoming

Questions about changing support in Wyoming

How often can I ask for a change in Wyoming?

If the order is more than 6 months old (or not adjusted in the last 6 months), any party can ask for a review if the guideline amount would change by 20% or more per month; that counts as a change of circumstances. You can also ask at any time for a substantial change of circumstances. Every 3 years, either parent can ask for a review without showing any change. Starting POWER (TANF), Medicaid, SNAP or SSI is a substantial change. Support cannot be changed for past months, except by agreement or back to the date the other side was served with the petition. (W.S. 20-2-311(a), (d))

How do I request a review in Wyoming?

Ask your local child support office for a review (you need an open case), or file the court's Child Support Modification packet yourself (Petition for Modification of Child Support and Judgment for Arrears) in district court.

Keep reading about Wyoming

Sources

Sources

Last checked: Oct 25, 2026.

Federal sources