Iowa judgment & prejudgment interest rates
Everything Iowa charges in interest on a money judgment or an overdue debt, in one place — the rate after judgment and the rate before it, each verified against the statute and linked to its full page with sources, history, and carve-outs.
| Metric | Rate | Basis |
|---|---|---|
| Post-judgment interest | 5.95% | Derived / formula |
| Prejudgment interest | 6.06% | Formula rate |
Post-judgment interest
Iowa's post-judgment interest rate is 5.95% per year. Unlike fixed-rate states, Iowa ties judgment interest to the market: Iowa Code §668.13 sets it at the 1-year Treasury constant maturity yield (Federal Reserve H.15) published immediately before the judgment, plus 2 percentage points, computed daily. That means the rate changes every week — this page computes it from the same official H.15 series that drives the federal post-judgment rate. A contract rate governs instead if the judgment is on a contract that fixes one.
→ Full Iowa post-judgment page — statute, effective-date history, and source.
Prejudgment interest
Iowa's prejudgment interest rate is 6.06% per year (formula rate). Iowa prejudgment interest is currently 6.06% per year — a statutory formula rate under Iowa Code § 668.13 that resets monthly. Prejudgment interest is broadly available on money due on judgments/decrees, including both tort/comparative-fault (§ 668.13 is in the comparative fault chapter) and contract claims (via §…
→ Full Iowa prejudgment page — when it applies, accrual, compounding, and carve-outs.
Frequently asked
What is the post-judgment interest rate in Iowa?
As of July 6, 2026, the Iowa post-judgment interest rate is 5.95% per year. Iowa’s market-linked judgment interest rate.
What is the prejudgment interest rate in Iowa?
Iowa's prejudgment interest rate is 6.06% per year (formula rate). Prejudgment interest is broadly available on money due on judgments/decrees, including both tort/comparative-fault (§ 668.13 is in the comparative fault chapter) and contract claims (via §…
Is Iowa judgment interest simple or compound, and when does it start?
See each rate's page for the exact compounding rule, accrual date, and statutory carve-outs — Iowa prejudgment interest in particular turns on the type of claim.
Compare every state on the state interest-rate index and the prejudgment interest index, or run the numbers with our interest calculators. Reference data only — not legal advice.