2026 South Dakota judgment & prejudgment interest rates
Current 2026 snapshot: South Dakota post-judgment interest is 10% per year; the recorded prejudgment reference is 10% per year.
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 recorded with a cited source and linked to its full page with observations, scope, and known carve-outs.
| Metric | Rate or rule | Effective / reference date | Authority | Basis |
|---|---|---|---|---|
| Post-judgment interest | 10% | July 9, 2026 | SDCL § 54-3-5.1 | Fixed by statute |
| Prejudgment interest | 10% | July 9, 2026 | SDCL 21-1-13.1 | Formula rate |
Post-judgment interest
South Dakota's post-judgment interest rate is 10% per year. SDCL §54-3-5.1 applies the fixed Category B rate—currently 10%—to its general judgment branch; it is not a periodically resetting formula. A lawful contract can control, inverse-condemnation awards follow a separate 4.5% branch, and excluded judgment categories require their own authority. Confirm the selected branch before calculating.
→ Full South Dakota post-judgment page — SDCL § 54-3-5.1, effective-date history, scope, and official source.
Prejudgment interest
South Dakota's prejudgment interest rate is 10% per year (formula rate). SDCL §21-1-13.1 uses the fixed Category B rate under §54-3-16—currently 10%—for its general prejudgment branch; it is not a periodically resetting formula. A contract can supply its stated rate, inverse condemnation follows a separate 4.5% branch, and statutory exclusions remain outside the headline.
→ Full South Dakota prejudgment page — SDCL 21-1-13.1, 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 fixed Category B judgment branch and exceptions.
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.
Cite this page
StatuteRates. “South Dakota Judgment & Prejudgment Interest Rates.” StatuteRates.com. Accessed today. https://statuterates.com/states/south-dakota/ Each rate includes a cited source and an effective or recorded-reference date; confirm the controlling authority before use.
Compare every state on the state interest-rate index and the prejudgment interest index, or enter a confirmed rate in the judgment interest and per-diem calculator. Reference data only — not legal advice.