Washington Judgment Interest Rate
United States Washington judgment interest — prime-linked since 2019.
→ All Washington judgment & prejudgment interest rates
Current rate
8.75% per year, effective July 8, 2026 Set by statute
Since a 2019 amendment to RCW 4.56.110, Washington ties tort and general judgment interest to the federal prime rate — currently about 8.75% — while judgments on a written contract carry the contract’s own rate. It’s simple interest.
→ See Washington’s prejudgment interest rate (interest before judgment — different rules)
Statutory basis & carve-outs. Post-judgment interest under RCW 4.56.110 (amended 2019): judgments on a written contract carry the contract’s rate; tort judgments and the general catch-all carry a rate tied to the federal prime rate (Fed H.15) — currently about 8.75%. Simple interest. Verify the current rate at app.leg.wa.gov and the Fed H.15 prime; not legal advice.
Effective-date history
| Effective date | Rate | Basis |
|---|---|---|
| July 8, 2026 | 8.75% | Statute |
Source & provenance
Latest value retrieved July 11, 2026 (11:51 UTC) from the official source:
https://app.leg.wa.gov/rcw/default.aspx?cite=4.56.110
Reference data only — not legal, tax, or financial advice. Always confirm the controlling value
against the official source and, where applicable, the governing statute or court before relying on it.