Illinois judgment & prejudgment interest rates
Everything Illinois 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 | 9% | Set by statute |
| Prejudgment interest | 6% / 5% | Fixed by statute |
Post-judgment interest
Illinois's post-judgment interest rate is 9% per year. Illinois judgments accrue interest at 9% per year under 735 ILCS 5/2-1303 — a flat statutory rate, simple interest, charged only on the unpaid portion of the judgment. The main exception: judgments against a unit of local government accrue 6%.
→ Full Illinois post-judgment page — statute, effective-date history, and source.
Prejudgment interest
Illinois's prejudgment interest rate is 6% / 5% per year (fixed by statute). Illinois prejudgment interest is 6% / 5% per year, as simple interest under 735 ILCS 5/2-1303(c). Interest Act (815 ILCS 205/2), 5%: available ONLY where the amount is LIQUIDATED or subject to easy computation — written instruments (bond, bill, promissory note), money lent/advanced,…
→ Full Illinois prejudgment page — when it applies, accrual, compounding, and carve-outs.
Frequently asked
What is the post-judgment interest rate in Illinois?
As of July 1, 2021, the Illinois post-judgment interest rate is 9% per year. Illinois’ 9% statutory judgment rate.
What is the prejudgment interest rate in Illinois?
Illinois's prejudgment interest rate is 6% / 5% per year (fixed by statute). Interest Act (815 ILCS 205/2), 5%: available ONLY where the amount is LIQUIDATED or subject to easy computation — written instruments (bond, bill, promissory note), money lent/advanced,…
Is Illinois 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 — Illinois 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.