Retainage · Kansas

Kansas retainage law: 5% cap (10% max), 30-day release (2026)

By Oussama Chicha, EditorUpdated Checked against primary sources · not yet reviewed by a licensed professionalFact-checked
Quick answer

Kansas has two near-identical acts, K.S.A. 16-1804 for private construction and K.S.A. 16-1904 for public. Retainage may not exceed 5% of the contract or subcontract unless a higher rate is needed to ensure performance, with 10% as the outer limit. Remaining retainage on undisputed payments is released within 30 days after substantial completion, and late retainage carries 18% interest a year.

Private work

Kansas · Private workVerified 2026-09-22
Retainage cap
5%
5% default ceiling, which the owner or contractor may raise to a maximum of 10% if a higher rate 'is required to ensure performance of the contract'; the owner may also increase retainage up to 10% if the contractor or subcontractor has failed to meet the contract terms, is behind schedule, or there are workmanship problems. Subsection (i) caps withholding at 10% of any undisputed payment due.
Deadline
30 days
Owner must release all remaining retainage on any undisputed payment due within 30 days after substantial completion of the project; if a contractor or subcontractor is still working, the owner may hold the portion attributable to that work until 30 days after it is completed. 'Substantial completion' is defined in K.S.A. 16-1802(i).
What the statute says
(a) Retainage shall not exceed 5% of the value of the contract or subcontract unless the owner or contractor determines that a higher rate of retainage is required to ensure performance of the contract. Retainage, however, shall not exceed 10% of the value of the contract or subcontract.
K.S.A. 16-1804 (Kansas Fairness in Private Construction Contract Act, K.S.A. 16-1801 et seq.) · Official text · retrieved 2026-09-22

Public work

Kansas · Public workVerified 2026-09-22
Retainage cap
5%
Same structure as the private act: 5% default, raisable to a maximum of 10% where a higher rate is required to ensure performance, or where the contractor or subcontractor has failed to meet the contract terms, is behind schedule or shows poor workmanship.
Deadline
30 days
Owner, contractor or subcontractor must release all remaining retainage on any undisputed payment due within 30 days after substantial completion of the project, as part of the regular payment cycle; retainage attributable to work still being performed may be held until 30 days after that work is completed.
What the statute says
(a) Retainage shall not exceed 5% of the value of the contract or subcontract unless the owner or contractor determines that a higher rate of retainage is required to ensure performance of the contract. Retainage, however, shall not exceed 10% of the value of the contract or subcontract.
K.S.A. 16-1904 (Kansas Fairness in Public Construction Contract Act, K.S.A. 16-1901 et seq.) · Official text · retrieved 2026-09-22

Who this applies to

Kansas handles retainage through a matched pair of statutes. The Kansas Fairness in Private Construction Contract Act, K.S.A. 16-1801 and following, puts its retainage rules in K.S.A. 16-1804 [1]. The Kansas Fairness in Public Construction Contract Act, K.S.A. 16-1901 and following, does the same for public work in K.S.A. 16-1904 [2]. Each reaches the whole payment chain, from owners holding back on contractors to contractors holding back on subcontractors. The two read so closely that one set of numbers serves both; among the differences are who must release and where the interest clause sits.

What the rule says

Under both acts, retainage starts from a 5% ceiling on the value of the contract or subcontract [1] [2]. It can go higher when the owner or contractor determines that a higher rate is required to ensure performance, and 10% of the contract or subcontract value is the outer limit [1] [2]. Neither act steps the rate down as the work progresses. Once the project is substantially complete, what remains on any undisputed payment comes out within 30 days [1] [2], apart from the share tied to work still being performed.

How to comply

Private work

Public work

Under both acts, a contractor or subcontractor may offer alternate security in place of retainage before work starts [1] [2]; the private act's definitions in K.S.A. 16-1802 cover the term [3]. Read the section that governs your job in the Sources below alongside your own contract's retainage clause.

What changed recently

The private section was enacted as L. 2005, ch. 156, § 4 [1], and the public one as L. 2007, ch. 163, § 4 [2]. Chapter 128 of the 2010 session laws amended both, with a July 1 effective date [1] [2].

Related

Retainage laws: other states

Sources

  1. K.S.A. 16-1804, Retainage; release of retainage; incomplete work; alternate security; failure to pay (Kansas Office of Revisor of Statutes) (retrieved 2026-09-22)
  2. K.S.A. 16-1904, Retainage; release and withholding thereof; alternate security; failure to pay (Kansas Office of Revisor of Statutes) (retrieved 2026-09-22)
  3. K.S.A. 16-1802, Definitions (Kansas Office of Revisor of Statutes) (retrieved 2026-09-22)

Changelog

  1. : Page published.
  2. : Dataset first published with 36 of 51 jurisdictions verified.