Legal

Kansas prompt payment act and retainage rules

Kansas has two fairness acts, one for private and one for public construction. Both require owner payment within 30 days of an undisputed pay request, sub payment within 7 business days, 18% interest on late money, and retainage of no more than 5% (10% with cause) released within 30 days after substantial completion.

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Review invoices, committed costs, and cash timing together before making project decisions. AI-generated illustration.

Kansas puts its payment rules in two parallel statutes: the Kansas Fairness in Private Construction Contract Act (K.S.A. 16-1801 to 16-1807) and the Kansas Fairness in Public Construction Contract Act (K.S.A. 16-1901 to 16-1908). On covered jobs the owner pays the contractor within 30 days of a timely, properly completed, undisputed request, the contractor pays its subs within 7 business days of being paid, and late money earns 18% a year. Retainage is capped at 5%, can go to 10% only for cause, and must be released within 30 days after substantial completion. Both acts say their rights cannot be waived by contract.

Kansas payment and retainage rules at a glance
RulePrivate work (K.S.A. 16-1803, 16-1804)Public work (K.S.A. 16-1903, 16-1904)
Owner pays contractorWithin 30 days after receipt of a timely, properly completed, undisputed requestWithin 30 days; up to 45 days if extenuating circumstances exist
Architect or engineer reviewNot set by the actReview, approve and forward within 7 business days
Contractor pays subsWithin 7 business days of receiving payment, including released retainageSame, 7 business days
Interest on late payment18% per year on the undisputed amount18% per year on the undisputed amount
Retainage cap5%, up to 10% if needed to ensure performance5%, up to 10% if needed to ensure performance
Retainage releaseWithin 30 days after substantial completionWithin 30 days after substantial completion, as part of the regular payment cycle
Incomplete work holdbackUp to 150% of its value, paid within 45 days after completionSame
Alternate securityAllowed if requested before work startsAllowed if requested before work starts
Not coveredHomes and multifamily of 4 units or less; public worksRoad, highway and bridge work; KDOT section 109 projects

Who the two acts cover

The private act applies to contracts between owners and contractors, contractors and subs, and subs and their own subs. K.S.A. 16-1807 carves out single family homes and multifamily housing of four units or less, and it does not apply to public works. So a residential remodeler working for a homeowner is outside it, while a sub on a 40-unit apartment building is inside it.

The public act defines the owner as a public entity: the state, cities, counties, school districts, state universities, special districts, and nonprofit organizations operated with public money for the public good. Its definition of construction leaves out roads, highways and bridges, and K.S.A. 16-1908 excludes projects that must follow section 109 of the Kansas Department of Transportation special provisions. Heavy civil contractors need to look at the KDOT contract instead.

Payment deadlines up the chain

On private work the clock starts when the owner receives a timely, properly completed, undisputed request for payment. Thirty days later, interest starts at 18% per annum on the undisputed amount. On public work the architect, engineer, or owner's agent has 7 business days to review and forward the request, and the owner then has 30 days, or 45 if extenuating circumstances prevent approval in 30.

The flow-down is tight. A contractor that gets paid owes its subs within 7 business days, retainage included when the owner releases it, as long as each sub submitted a proper, undisputed request. Interest at 18% runs from the eighth business day. The same rule applies from a sub to its lower tiers. Say a GC collects a $210,000 progress payment on a Wichita office job that includes $36,000 for the mechanical sub. That $36,000 is due in 7 business days, and every day after that costs the GC interest.

Retainage limits and release

Retainage cannot exceed 5% of the contract or subcontract unless the owner or contractor decides more is needed to ensure performance, and even then it tops out at 10%. The acts list what justifies the increase: failing to meet contract terms, falling behind schedule, workmanship problems, or other issues. No one in the chain may hold more than 10% of any undisputed payment.

  • Release deadline: all remaining retainage on undisputed amounts within 30 days after substantial completion. If some trade is still working, the owner may hold the share tied to that work until 30 days after it is done.
  • Incomplete work: an owner, contractor, or sub may hold up to 150% of the value of incomplete work caused by the party it is paying, and must pay it within 45 days after that work is completed.
  • Early release for subs: if the owner, contractor and architect or engineer agree a sub finished satisfactorily, its retainage can be released before the whole project closes, passed through in the next payment cycle.
  • Late retainage: 18% per annum from the first business day after it was due.

Alternate security instead of retainage

Before work starts, a contractor or sub may ask to post alternate security instead of having retainage withheld. The statutes define it as an irrevocable bank letter of credit, certificate of deposit, cash bond, or other asset worth at least the retained amount. Performance and payment bonds do not count. The party that would hold the retainage picks which form it will accept, so raise it during subcontract negotiation, not after the first pay app.

Pay-if-paid, suspension and fee shifting

On private jobs, K.S.A. 16-1803(c) says a clause making a sub's payment contingent on the owner paying is no defense to a mechanic's lien or bond claim. A pay-if-paid clause may still sit in the subcontract, but it will not defeat a lien. Both acts also void clauses that waive lien or bond rights beyond the amount actually paid. The public act goes further and voids no-damages-for-delay clauses.

If an undisputed payment is 7 business days late, the unpaid party can give 7 more business days of written notice and then suspend work. The contract time is extended and the price rises by reasonable demobilization, delay and remobilization costs. In an action to enforce the act, the court or arbitrator must award costs and attorney fees to the prevailing party (on public jobs, that fee rule covers disputes between contractors and subs and between subs), and venue is the county where the property sits.

Keeping the dates straight

Thirty days, 7 business days, 45 days, and an 18% rate are easy to lose across a dozen jobs. Log each pay app's receipt date, track retainage by job and by sub, and keep your mechanics lien dates running in parallel. Check Kansas contractor license rules and Kansas prevailing wage as well. Smart Business Automator tracks invoices, retainage and sub payments by job, so overdue items show up early; see construction accounts receivable automation. For the general concept, read prompt payment act.

Frequently asked questions

What interest rate applies to late construction payments in Kansas?

Both fairness acts set 18% per annum on the undisputed amount, for late progress payments, late sub payments, and late retainage.

How much retainage can be held in Kansas?

No more than 5% of the contract or subcontract, unless the owner or contractor determines more is needed to ensure performance. Even then, it cannot exceed 10%.

Does the Kansas private act cover home remodeling?

No. K.S.A. 16-1807 excludes single family residential housing and multifamily housing of four units or less.

Can a contract waive the Kansas prompt payment rules?

No. Both acts say their rights and duties cannot be waived or varied by contract, and waiver terms are unenforceable.

Do the public rules apply to road and bridge jobs?

No. The public act's definition of construction excludes roads, highways and bridges, and K.S.A. 16-1908 excludes projects that must follow KDOT special provision section 109.

Sources

  1. Kansas Revisor of Statutes: K.S.A. 16-1801, private act title and non-waiver
  2. Kansas Revisor of Statutes: K.S.A. 16-1802, definitions
  3. Kansas Revisor of Statutes: K.S.A. 16-1803, private payment provisions
  4. Kansas Revisor of Statutes: K.S.A. 16-1804, private retainage
  5. Kansas Revisor of Statutes: K.S.A. 16-1805, suspension of performance
  6. Kansas Revisor of Statutes: K.S.A. 16-1806, fees and venue
  7. Kansas Revisor of Statutes: K.S.A. 16-1807, private act scope
  8. Kansas Revisor of Statutes: K.S.A. 16-1902, public act definitions
  9. Kansas Revisor of Statutes: K.S.A. 16-1903, public payment provisions
  10. Kansas Revisor of Statutes: K.S.A. 16-1904, public retainage
  11. Kansas Revisor of Statutes: K.S.A. 16-1907, no-damages-for-delay clauses
  12. Kansas Revisor of Statutes: K.S.A. 16-1908, public act scope

Laws and rates change. Confirm current requirements with the state agency before you bid, file, or pay. This page is general information, not legal advice.

Written and edited by

Maurice Francois writes and edits construction operations guides for Smart Business Automator. More from Maurice on the Scaling Legends podcast.

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