South Dakota judgment & prejudgment interest rates
Everything South Dakota 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 | 10% | Set by statute |
| Prejudgment interest | 10% | Formula rate |
Post-judgment interest
South Dakota's post-judgment interest rate is 10% per year. South Dakota money judgments carry a fixed statutory rate of 10% per year under SDCL § 54-3-5.1, as simple interest. Post-judgment default is Category B = 10% under SDCL 54-3-5.1. EXCLUSIONS from that section (these are NOT at the flat Category B judgment rate): (1)…
→ Full South Dakota post-judgment page — statute, effective-date history, and source.
Prejudgment interest
South Dakota's prejudgment interest rate is 10% per year (formula rate). South Dakota prejudgment interest is currently 10% per year — a statutory formula rate under SDCL 21-1-13.1 that resets periodically. Broad availability but with sharp claim-type carve-outs.
→ Full South Dakota prejudgment page — when it applies, accrual, compounding, and carve-outs.
Frequently asked
What is the post-judgment interest rate in South Dakota?
As of July 9, 2026, the South Dakota post-judgment interest rate is 10% per year. South Dakota’s statutory judgment interest rate.
What is the prejudgment interest rate in South Dakota?
South Dakota's prejudgment interest rate is 10% per year (formula rate). Broad availability but with sharp claim-type carve-outs.
Is South Dakota 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 — South Dakota 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.