Kansas · Unpaid invoice

Unpaid invoice in Kansas small claims

Client won't pay your invoice? Collect it in small claims.

If a client or customer has not paid an invoice for work you delivered or goods you sold, small claims court is a low-cost way to collect. You do not need a lawyer. The strength of your case usually comes down to clear proof: the agreement or terms, the invoice, evidence the work or goods were delivered, and a record of your attempts to collect.

In Kansas, small-claims cases are heard in the the small claims division of the District Court and you can sue for up to $10,000 (exclusive of interest and costs).

Unpaid invoice: steps that matter

  1. Send a final written demand (a clear statement of what is owed and a payment deadline) and keep proof you sent it.
  2. Gather your contract or written terms, the invoice, delivery/completion proof, and any messages showing the other side accepted the work.
  3. Confirm you are within the statute of limitations below before you file.
  4. File in the correct court for where the defendant is or where the work happened, and keep every date and document together.

Filing your petition (the judicial-council small claims form) in Kansas

  1. Prepare the statement of your small claim (petition). Fill out the judicial-council small claims form, which K.S.A. 61-2705 requires and denominates a petition. It must set forth a short and plain statement of the claim showing entitlement to relief and contain a demand for judgment. The claim cannot exceed $10,000 (K.S.A. 61-2703).
  2. File with the clerk of the district court in the proper county and pay the docket fee. File the written statement with the clerk of the court. Per K.S.A. 61-2704(b), pay a docket fee of $35 if the claim does not exceed $500, or $55 if it exceeds $500. Venue is governed by K.S.A. 61-2708 (article 34 of chapter 61). No person may file more than 20 small claims in the same court in one calendar year.
  3. Have the defendant served with process. After filing, service of process must be obtained within 90 days (K.S.A. 61-2704(a)). The sheriff serves process unless a party elects to do so; methods under K.S.A. 61-3003 include return receipt (certified mail) delivery, personal service, and residence service.
  4. Attend the hearing on the date set by the court. The summons states the time the defendant must appear or answer; that time is set by the court at not less than 14 nor more than 50 days after the summons is issued (K.S.A. 61-3002). Parties present their own cases; attorneys are generally excluded under K.S.A. 61-2707 unless the opposing party is represented.

Filing fees: The docket fee is $35 for claims of $500 or less, or $55 for claims over $500 (K.S.A. 61-2704). Verify current fees with the clerk.

Deadline that applies to your unpaid invoice

An unpaid invoice is usually a contract or account claim. If you had a signed agreement or written terms, the written-contract statute of limitations below typically applies; a purely verbal deal usually falls under the oral-contract period. That statute is the deadline to file, so do not wait too long.

Written contract: 5 years (K.S.A. § 60-511)

Answering a lawsuit: Set by the court in the summons: not less than 14 nor more than 50 days after the summons is issued. Failure to appear or answer results in default judgment.

Serving the defendant: Service of process is normally made by the sheriff (unless a party elects to serve), and must be obtained within 90 days of filing. Methods include return receipt delivery (e.g., certified mail, priority mail, or commercial courier), personal service, and residence service. An acknowledgment or voluntary appearance is equivalent to service.

Appeals: Either party may appeal to a district judge within 14 days after entry of judgment; the appeal is tried de novo before a different district judge.

This page is general information, not legal advice, and CaseBySelf is not a law firm. Rules, fees, and deadlines change and vary by court: verify with the specific court where you file. Source: Kansas Office of Revisor of Statutes - K.S.A. 61-2703 (Definitions; small claim, amount). Last reviewed 2026-06-23.