Arizona Small Claims Counterclaim: How to File One With Your Answer

When You Have Your Own Claim Against the Plaintiff

Being sued doesn't mean the other side is the only one with a grievance. If the plaintiff owes you money from the same transaction or incident, Arizona law allows you to file a counterclaim under Rule 9 of the Arizona Rules of Small Claims Procedure.

A contractor sues you for an unpaid balance, but their work damaged your flooring. A former tenant sues for a security deposit, but they left the property with holes in the walls. A private car seller sues for the balance owed, but the car had undisclosed mechanical problems. These are the situations where a counterclaim turns defense into offense.

How to File a Counterclaim

A counterclaim must be filed at the same time as your Answer — or at minimum within 20 calendar days of service. You can't wait until the hearing to spring it on the plaintiff.

The process:

1. Complete your Answer form (denying or partially admitting the plaintiff's claim)
2. Complete a separate Counterclaim form — in Pima County, this is Form CVSC6; in Maricopa and other counties, it may be a section within the Answer form or a standalone filing
3. Pay the counterclaim fee. If you file simultaneously with your Answer, many courts waive or reduce the separate fee. Pima County, for example, charges $0 for a counterclaim filed at the time of Answer using Form CVSC6, versus $33 if filed separately
4. Serve a copy of both documents on the plaintiff

Once served, the plaintiff has 20 calendar days to file a written Reply to your counterclaim.

The Dollar Limit Matters

Small claims counterclaims are subject to the same jurisdictional cap as the original claim — $5,000 under A.R.S. § 22-503, exclusive of interest and costs. If your counterclaim stays within that cap, the case remains in the Small Claims Division and proceeds on the same schedule.

If your counterclaim exceeds the cap, the consequences are automatic: under A.R.S. § 22-517 and ARSCP Rule 9, an oversized counterclaim triggers a mandatory transfer of the entire case to the regular Civil Division of the Justice Court.

Transfer changes the game:

• Attorneys are now permitted (in small claims, they're prohibited unless both sides consent in writing)
• Formal discovery rules apply — interrogatories, depositions, document requests
• Either party can demand a jury trial
• The losing party can appeal to Superior Court
• Transfer fees are assessed to the party requesting it

If your counterclaim is worth $6,800 and the additional litigation complexity isn't worth it, you can waive the excess and file for $5,000 instead. You permanently give up the difference, but you keep the case in the simpler small claims track.

Counterclaim vs. Answer-Only: A Decision Framework

Filing a counterclaim isn't always the right move. Consider:

File a counterclaim when: You have a genuine monetary claim arising from the same dispute, with evidence to support it. Your damages are within the small claims cap. The counterclaim strengthens your overall position — the judge sees both sides of the story.

File an answer only when: Your best defense is simply that you don't owe the amount claimed. Adding a counterclaim would complicate the hearing without a clear financial upside. Or your damages exceed the cap and you'd rather sue separately in the Civil Division on your own timeline.

Consider transfer when: The stakes are high enough to justify hiring an attorney, you want discovery rights to compel documents from the other side, or you want the ability to appeal if the decision goes against you.

No Amendments Allowed

One important rule: Arizona small claims pleadings cannot be amended once filed. If you file a counterclaim and later realize the amount was wrong or you left out a claim, you can't revise it. The plaintiff faces the same restriction — if they need to change their complaint, they must dismiss and refile from scratch.

Get the amounts right the first time. Review your receipts, invoices, and damage estimates before filing.

Get the complete Arizona Small Claims Response Guide — includes the counterclaim decision map, fee schedules, and filing instructions for every county.

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