South Dakota Payment Bond Claim — No Notice on General Public Work, the Six-Month Wait After Final Settlement, the One-Year Suit Window and the Six-Month Highway Notice (SDCL ch. 5-21 and ch. 31-23, 2026)
✓ Verified against South Dakota statutes · Reviewed November 2026 · By Michael Evan — Founder · 50 states · 799 rules
South Dakota mechanics lien deadlines at a glance
Preliminary Notice
60 days (post-NPC) — Notice of Right to Claim Lien
Mechanics Lien
120 days — SDCL § 44-9-15
Enforcement
6 years — § 44-9-26
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Why a South Dakota Public Job Runs on a Bond
On private work in South Dakota, an unpaid sub or supplier protects itself with a pre-lien notice and a chapter 44-9 mechanics lien recorded with the Register of Deeds, as covered in the South Dakota pre-lien notice guide . A Sioux Falls School District addition, a South Dakota State University building in Brookings, a Rapid City water project or a South Dakota Department of Transportation interchange on I-29 is different. Public property cannot be sold to pay a contractor’s bills, so the mechanics lien does not reach it. The protection is the surety the public owner takes from the prime. South Dakota’s Little Miller Act is really two statutes. SDCL chapter 5-21 covers public improvements generally: buildings, utilities and other public works let by the State or any public corporation. SDCL chapter 31-23 covers public highway contracts. The two chapters disagree on the point contractors care about most, which is whether a notice is required. Chapter 5-21 has none. Chapter 31-23 requires one from remote claimants. The Mechanics Lien Management Method starts every South Dakota public job by classifying it: general public improvement or highway. That one decision tells you whether you owe a notice, which date starts the clock, and whose name goes on the lawsuit.
The Bond: Full Contract Price, Waivable Below $100,000
The practical warning sits in § 5-21-1.1. On a public contract under $100,000, the security may have been waived, and there may be no bond to claim against. Ask the public owner what security was furnished before you extend credit on a small public job.
General Public Work: The Affidavit, the Six-Month Wait and the One-Year Window
SDCL § 5-21-6 follows an old federal model, the Heard Act, which the Miller Act replaced in 1935. The public corporation has the first right to sue on the surety. If it brings no suit within six months from the completion and final settlement of the contract, an unpaid claimant may act on its own: If the public corporation sues first, § 5-21-5 lets any unpaid claimant intervene. The public corporation’s claim is paid first; if the surety’s liability is not enough to cover everyone else, the rest is split pro rata among the interveners. Under § 5-21-7 the surety may pay the full penalty of the bond into court and be released. On a troubled job with many unpaid subs, joining early matters. If the dates are unclear, take the file to a South Dakota construction attorney before the window opens.
When the Owner Skipped the Bond: 90 Days From Acceptance
Under SDCL § 5-21-2, a public corporation that fails or neglects to require the § 5-21-1 surety becomes liable itself to anyone who performed labor or furnished material that went into the building’s erection, alteration, repair or improvement, for the value of that work or material. This is the fastest clock in the chapter: the action must be commenced within ninety days from the acceptance of the work . If you learn there is no bond, do not wait for final settlement. Calendar 90 days from acceptance and act.
Highway Contracts: The Six-Month Remote-Claimant Notice
SDCL chapter 31-23 follows the Miller Act model instead. Under § 31-23-2, anyone who furnished labor or material on a highway contract bonded under § 31-23-1, and who has not been paid in full six months after its last labor or material , may sue on the bond for the unpaid balance. The typical remote claimant is an aggregate supplier selling to a paving sub, or an equipment rental house leasing a loader to a dirt sub on an SDDOT job near Sioux Falls or Rapid City. Calendar the six months from your own last delivery ticket, not from the prime’s schedule.
Every South Dakota Public-Project Deadline in One Table
The Mechanics Lien Management State System calendars the highway notice from your last-furnishing date and the suit window from final settlement. Private-work rules are on the South Dakota lien statutes page, and the calculator is on the South Dakota mechanics lien hub . Work at Ellsworth Air Force Base near Rapid City, the Sioux Falls VA Health Care System and the Black Hills VA runs under the federal Miller Act. The mechanics lien vs. bond claim page compares the systems. The federal clock runs from your own last furnishing, not from final settlement, so a South Dakota sub working both sides of the Ellsworth fence line runs two different calendars.
Classify the Job, Track Final Settlement, Sue in the Window
South Dakota Public Works Workflow Confirm a bond was furnished and get a copy. On a highway job where your customer is a subcontractor, send the six-month notice to the prime by certified mail. On general public work, ask the owner for the final settlement date, file the affidavit, and sue between six and twelve months after final settlement. Pair it with these resources: Because the claim ends in a circuit court suit against the surety, connect early with a South Dakota construction attorney through the Mechanics Lien Management network, or request a formal attorney review of the claim file.
South Dakota’s Clock Starts at Final Settlement
The Mechanics Lien Management deadline calculator tracks the highway notice, the six-month wait and the one-year suit window on every South Dakota public job. Miss the deadline and you lose your claim rights entirely.
Frequently Asked Questions
Is there a notice deadline for a South Dakota payment bond claim?
Not on general public improvement work. SDCL chapter 5-21 contains no claimant notice to the contractor or the surety. The step it does require comes later: under § 5-21-6 the claimant applies to the public corporation, furnishes an affidavit that it supplied labor or material for the work and was not paid, and receives a certified copy of the contract and surety to sue on. Public highway contracts are different. Under § 31-23-3, a claimant in contract with a subcontractor, and not with the bonded contractor, must give the contractor written notice within six months of its last labor or material.
When can I sue on a South Dakota public improvement bond?
Under SDCL § 5-21-6, a claimant's suit on the contractor's surety may not be commenced until six months after the complete performance of the contract and its final settlement, and must be commenced within one year thereafter. Read the deadline conservatively and file within one year of final settlement. Only one action may be brought; other claimants may file their claims in it and be made parties within one year from completion of the work, and not later.
Where is a South Dakota bond suit filed?
On general public improvement work, in the name of the public corporation, for the claimant's use and benefit, in the circuit court for the county in which the contract was to be performed and not elsewhere (SDCL § 5-21-6). On public highway contracts, in the name of the State of South Dakota, for the use of the person suing, in the circuit court within the circuit in which the contract was to be performed, regardless of the amount in controversy (§ 31-23-4).
What notice does a sub-tier supplier owe on a South Dakota highway project?
Written notice to the contractor that furnished the § 31-23-1 bond, within six months from the date it last performed labor or furnished material, stating with substantial accuracy the amount claimed and the name of the party it supplied or worked for (SDCL § 31-23-3). Serve it by registered or certified mail, postage prepaid, addressed to the contractor's principal office, place of business or residence, or in any manner South Dakota law authorizes for service of process. First-tier subs and suppliers owe no notice, but any claimant must wait until six months pass unpaid before suing (§ 31-23-2).
Which South Dakota public contracts require a payment bond?
Under SDCL § 5-21-1, any contract for the construction of a public improvement, or for furnishing material or labor for it, requires the contractor to furnish surety of not less than the contract price before starting work, with the added obligation to promptly pay everyone supplying it labor or material. A public corporation may waive the performance security when the bid does not exceed the $100,000 public improvement bid limit set under § 5-18A-14 (§ 5-21-1.1), and for qualifying emergency procurements (§ 5-21-1.3). Public highway contracts carry a performance bond of at least the contract price running to the State under § 31-23-1.
What if the South Dakota public owner never required a bond?
Under SDCL § 5-21-2, a public corporation that fails or neglects to require the § 5-21-1 surety is liable to anyone who performed labor or furnished material that entered into the building's erection, alteration, repair or improvement, for the value of that work or material. The window is short: the action must be commenced within ninety days from the acceptance of the work.
Can I file a mechanics lien on a South Dakota school or city project?
No. The SDCL chapter 44-9 mechanics lien is a private-property remedy and does not attach to public land. On a state, county, city or school district project, the security is the contractor's surety under chapter 5-21, or the highway bond under chapter 31-23. Federal work, such as at Ellsworth Air Force Base or the Sioux Falls VA Health Care System, runs under the federal Miller Act instead.