What is the current Washington post-judgment interest rate?

As of July 8, 2026: Washington Judgment Interest Rate is 12% / 8.75% per year. Washington’s claim-specific judgment rates under RCW 4.56.110.

Washington post-judgment interest rate

United States Washington’s claim-specific judgment rates under RCW 4.56.110.

→ All Washington judgment & prejudgment interest rates

Current rate

12% / 8.75% per year, effective July 8, 2026
Statutory formula / table

2026 Washington post-judgment interest at a glance

Current rate: 12% / 8.75% per year
Effective date: July 8, 2026
Controlling authority: RCW 4.56.110
Rate basis: Statutory formula / table
Source checked: July 9, 2026
Recorded history: 1 data point

RCW 4.56.110 does not set one Washington rate for every judgment. General “all other” money judgments use the RCW 19.52.020 maximum rate (currently 12%); unpaid consumer-debt judgments use 9%; qualifying private student-loan and non-public-agency tort judgments use the Federal Reserve prime rate from the preceding month plus two points (currently 8.75%). Written contracts, unpaid child support, and public-agency tort judgments follow separate branches.

How Washington post-judgment interest works

Which rate applies

RCW 4.56.110 separates written contracts, unpaid child support, public-agency torts, other torts, private student-loan debt, consumer debt, and all remaining judgments. A contract rate must be stated in the judgment; child-support judgments use 12%; public-agency torts use a separate 26-week Treasury-bill formula.

When interest accrues

The statute generally runs interest from entry of judgment. For specified verdicts later entered, affirmed, or reinstated on review, interest on the judgment or affirmed portion dates back to the verdict date.

Compounding and rate lock

StatuteRates keeps the Washington payoff calculator disabled because the page models several rate branches but not every day-count, compounding, appellate, payment-allocation, and historical benchmark input needed for a deterministic result.

Official history coverage

The current page records the major §4.56.110 branches and their present references. A complete historical schedule would require separate prime, Treasury-bill, contract, consumer, and statutory-maximum timelines, so missing branch histories are not collapsed into one misleading series.

→ Calculate interest at this rate

→ See Washington’s prejudgment interest rate (interest before judgment — different rules)

Statutory basis & carve-outs. Post-judgment interest under RCW 4.56.110 sets DISTINCT rates by claim type: general "all other" money judgments carry the statutory maximum under RCW 19.52.020 (currently 12%); consumer-debt judgments 9% (fixed); tort judgments against individuals/entities carry the federal prime rate + 2% (currently 8.75%); child-support judgments 12%; judgments on a written contract carry the contract’s rate. Simple interest. Verify at app.leg.wa.gov; not legal advice.

Current recorded observation

One current observation is on record; this page does not claim complete historical coverage. All recorded observations are in the JSON API.
Effective date	Rate	Basis
July 8, 2026	12% / 8.75%	Statute

Source & provenance

Observation recorded July 9, 2026 (00:00 UTC) from the cited source (Washington State Legislature (official)):
https://app.leg.wa.gov/rcw/default.aspx?cite=4.56.110

Cite this page

StatuteRates. “Washington Judgment Interest Rate.” StatuteRates.com. Accessed today. https://statuterates.com/rates/washington-judgment-rate/ Rate recorded under RCW 4.56.110, effective July 8, 2026.

Reference data only — not legal, tax, or financial advice. Always confirm the controlling value against the controlling official source and, where applicable, the governing statute or court before relying on it.