Wyo. Stat. § 7-11-504
If a defendant sentenced to pay a fine or costs defaults in payment, the court may order the defendant to show cause why he should not be committed to jail. If the court finds that the defendant's default is willful or is due to a failure on defendant's part to make a good faith effort to obtain the funds required for the payment and the court determines that the defendant has an ability to pay or that a reasonable probability exists that the defendant will have an ability to pay, the court may order him committed until the fine or costs, or a specified part thereof, is paid. The defendant shall be given a credit for each day of imprisonment at the rate provided by W.S. 6-10-105, and may earn additional credits against his fine or costs for work performed as provided by W.S. 7-16-101 through 7-16-104.
W.S. 7-11-504