# Montana — Construction prompt payment act deadlines by US state — owner-to-contractor and contractor-to-subcontractor payment windows, retention release deadlines, and late-payment interest rates

For Montana, owner-to-gc payment deadline (days) is 7; gc-to-sub flow-down deadline (days) is 7; late-payment interest rate is 1.5% per month; project types covered is both; attorney fees recoverable is yes, verified against its source on 2026-08-15.

- **State:** Montana _(verified: appears in the quote below)_
- **Owner-to-GC payment deadline (days):** 7 _(verified: appears in the quote below)_
- **GC-to-sub flow-down deadline (days):** 7 _(verified: appears in the quote below)_
- **Late-payment interest rate:** 1.5% per month _(verified: appears in the quote below)_
- **Project types covered:** both _(verified: appears in the quote below)_
- **Attorney fees recoverable:** yes _(verified: appears in the quote below)_
- **Statutory citation:** Mont. Code Ann. §§ 28-2-2101 et seq.; §§ 17-8-241–17-8-244 _(verified: appears in the quote below)_

## What the source says

> The deadlines and penalties for both types of projects are regulated under the same statutes <https://www.levelset.com/prompt-payment/montana-prompt-payment-faqs/#faq-item-statute-private-projects-2822101-definitions> Mont. Code Ann. §§28-2-2101 et seq. These rules apply to all projects, except residential construction projects of less than $400,000. Payment Deadlines Payments on Montana construction projects are structures as monthly payments. Upon receipt of a request for payment, the owner or public entity must make payment within 7 days of the approval of the request. Approval or denial of the request for payment must be done within 21 days of receipt. These deadlines may be modified as long as the contract specifically states an alternate billing cycle. Penalties for Late Payment There are certain <https://www.levelset.com/prompt-payment/montana-prompt-payment-faqs/#faq-item-private-projects-are-there-reasons-for-which-payment-may-be-withheld-past-the-general-deadline> reasons, outlined in the statute, for withholding payments . However, if none of these circumstances exist, and any payments are late, or otherwise wrongfully withheld, the unpaid balance will begin accruing interest at a rate of 1.5% per month until payment is made.

## Source

- https://www.levelset.com/prompt-payment/montana-prompt-payment-faqs/

Last verified: 2026-08-15. Review by: 2027-08-15.
Part of [Construction prompt payment act deadlines by US state — owner-to-contractor and contractor-to-subcontractor payment windows, retention release deadlines, and late-payment interest rates](https://referencesource.org/construction-prompt-payment-deadlines-by-state/).