Judgment Interest Calculator — Post-Judgment Rates by State
NewCalculate post-judgment interest in any state or federal court: the current statutory or index rate, consumer and medical debt rates, simple or compound interest, and the daily accrual.
By Konstantin Iakovlev · Updated September 2026 · Source: State post-judgment interest statutes and rate publications; 28 U.S.C. §1961
Interest owed
$2,835.62
Total due
$52,835.62
Interest per day
$13.70
California post-judgment interest
| Rate | 10% |
| Interest | Simple |
| Days | 207 |
| $50,000.00 × 10% × 207 days ÷ 365 | $2,835.62 |
| Judgment plus interest | $52,835.62 |
Fixed by statute.
Rates as of 2026-09-28. A contract rate, a partial payment or a court order can change what is owed. Cal. Code Civ. Proc. § 685.010
Use the Judgment Interest Calculator — Post-Judgment Rates by State above to calculate your results. Enter your values and see instant results — all calculations run in your browser.
Disclaimer: This calculator is for informational purposes only and does not constitute legal advice. Results are estimates based on the information you provide and the rules described on this page. Consult an attorney licensed in your state for advice specific to your situation.
How It Works
A money judgment earns interest from the day it is entered until it is paid, at a rate set by state law or, in federal court, by 28 U.S.C. §1961. Some states fix the rate in the statute, such as 10% in California, 9% in New York and Illinois, 6% in Pennsylvania and Virginia and 12% in Massachusetts. Others tie it to an index plus a margin, such as prime plus 3% in Georgia or the prime rate with a 5% floor and 15% ceiling in Texas.
For most index-based states the rate is locked on the date of judgment for the life of the judgment, so an older judgment keeps the rate in force when it was entered. A few states, including Florida, Kansas, Michigan, Nevada, New Jersey, Oklahoma and South Carolina, reset the rate on a schedule for existing judgments too. Several states set lower rates for consumer and medical debt owed by individuals: 2% on consumer debt in New York and 5% on smaller medical and personal debts in California.
Almost every state charges simple interest, actual days over 365. Colorado, Kentucky, Michigan, Oklahoma, South Carolina, Texas and the federal courts compound it yearly. Rates here are current as of late September 2026, after the Federal Reserve raised prime to 7% on September 17, which moved the states tied to prime or the discount rate.
Example: $50,000 Judgment Paid After 200 Days
- 1 Input: a $50,000 judgment entered on March 15, 2026 and paid on October 1, 2026, which is 200 days.
- 2 California at 10%: $50,000 × 10% × 200 ÷ 365 = $2,739.73.
- 3 New York at 9%: $2,465.75. Texas at 6.75%: $1,849.32 (compounding starts only after a full year).
- 4 Result: the debtor in California pays $52,739.73, and interest keeps adding $13.70 a day until payment.
Source: State post-judgment interest statutes and rate publications; 28 U.S.C. §1961 · Last updated: September 2026
Frequently Asked Questions
What is the post-judgment interest rate in California?
What is the post-judgment interest rate in Texas?
How is federal post-judgment interest calculated?
Does judgment interest compound?
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