Post-Judgment Interest Calculator

Enter the judgment principal, statutory interest rate, and number of years to calculate total interest accrued, daily accrual, and the updated balance owed.

Created by Luis GonzalezLast updated: June 22, 2026

How to Use This Calculator

1
Enter the judgment principal
Input the original dollar amount awarded by the court in the judgment, excluding any pre-judgment interest.
2
Specify the annual interest rate
Provide the post-judgment interest rate, which is typically set by federal or state statute or by the court order itself.
3
Input the post-judgment years
Enter the total number of full years that have passed since the court judgment was officially entered.
4
Review the total balance due
The calculator will display the total balance due, including accrued interest, along with annual, monthly, and daily accrual breakdowns.

Example Calculation

A plaintiff was awarded a $210,000 judgment, and with a statutory annual interest rate of 4%, needs to determine the total balance due after 3 full years.

Judgment Principal ($)

210,000

Annual Interest Rate (%)

Post-Judgment Years (yrs)

Results

$235,200

Tips

Verify the Applicable Interest Rate

Post-judgment interest rates vary significantly by jurisdiction. Federal judgments use a rate tied to Treasury yields, while state rates can range from 0% to 12% or more. Always confirm the specific statutory rate for your state and the exact date the judgment was entered, as rates can change annually.

Account for Partial Payments

If any partial payments have been made since the judgment, they typically reduce the principal balance first, affecting the interest accrual. This calculator assumes no payments have been made. Adjust your principal input if payments have reduced the original amount.

Understand Compounding vs. Simple Interest

Most post-judgment interest is calculated as simple interest, meaning it accrues only on the original principal amount, not on previously accrued interest. However, some jurisdictions or specific judgment types might allow for compounding. Confirm the calculation method for your specific case, as it significantly impacts the total owed.

Calculating Post-Judgment Interest and Total Balance Due

When a court issues a monetary award, the judgment doesn't just sit static; it accrues interest until it's paid. The Post-Judgment Interest Calculator helps you accurately compute this ongoing interest, providing a clear picture of the total balance due, including daily and monthly accruals. This calculation is vital for legal professionals and judgment creditors alike, as interest rates can add a significant amount to the principal, potentially increasing the total owed by thousands of dollars annually, depending on the statutory rate in 2025.

Navigating Post-Judgment Interest Rates in Legal Proceedings

Post-judgment interest rates are a critical component of legal awards, ensuring that the prevailing party is compensated for the time value of money lost due to delayed payment. These rates are typically established by state or federal statutes and can vary significantly. For instance, the federal post-judgment interest rate, governed by 28 U.S.C. § 1961, is tied to the weekly average 1-year Treasury constant maturity yield, which has fluctuated from below 1% to over 5% in the last five years. In contrast, many states set a fixed statutory rate; for example, California Code of Civil Procedure § 685.010 sets a 10% annual rate, while others, like New York, use a 9% rate. Understanding these specific rates and their application from the date of judgment is essential for accurate financial planning and enforcement.

The Simple Interest Calculation for Post-Judgment Awards

The Post-Judgment Interest Calculator employs a straightforward simple interest formula to determine the total interest accrued and the final balance due. Unlike compound interest, simple interest is calculated solely on the original principal amount, making the calculation transparent and easy to follow.

The core formulas are:

Annual Interest = Judgment Principal × (Annual Interest Rate / 100)
Total Interest Accrued = Annual Interest × Post-Judgment Years
Total Balance Due = Judgment Principal + Total Interest Accrued

These calculations provide a clear, year-by-year breakdown of how the interest accumulates, offering transparency for all parties involved in a legal judgment.

💡 For other legal calculations involving financial awards, our Wrongful Termination Back Pay Calculator can help quantify lost wages and benefits.

Calculating the Total Balance After Three Years

Let's consider a scenario where a court awarded a plaintiff a $210,000 judgment principal. The statutory annual interest rate is 4%, and 3 full years have passed since the judgment was entered.

Calculate Annual Interest:
- Annual Interest = $210,000 × (4 / 100) = $8,400
Calculate Total Interest Accrued:
- Total Interest Accrued = $8,400/year × 3 years = $25,200
Calculate Total Balance Due:
- Total Balance Due = $210,000 (Principal) + $25,200 (Interest) = $235,200

Thus, after three years, the total balance due on the judgment, including accrued interest, is $235,200. This example clearly illustrates how post-judgment interest can add a significant sum to the original award over time.

💡 If you are assessing other types of legal damages, our Wrongful Death Damages Calculator provides tools for estimating compensation in complex cases.

Industry Benchmarks for Post-Judgment Interest Rates

Post-judgment interest rates vary significantly across jurisdictions, reflecting diverse legal and economic philosophies. For federal judgments in the United States, the rate is tied to the weekly average 1-year Treasury constant maturity yield, which has seen considerable fluctuation, for example, hovering around 0.5% in early 2021 and rising to over 5% by late 2023. This dynamic rate ensures it generally aligns with prevailing market conditions. In contrast, many U.S. states set fixed statutory rates, such as California's 10% per annum, or Texas's 5% (or prime plus 5%, whichever is greater, capped at 15%). These fixed rates provide predictability but may not always reflect current market interest rates. Understanding these benchmarks is critical for legal professionals to accurately advise clients on the potential value of a judgment over time.

The Statutory Basis for Post-Judgment Interest

Post-judgment interest is a legally mandated mechanism designed to ensure that a successful litigant is fully compensated for the time value of money and for any delay in payment of a court-ordered award. In the federal system, this is primarily governed by 28 U.S.C. § 1961, which stipulates that interest shall be calculated from the date of the entry of the judgment at a rate equal to the weekly average 1-year constant maturity Treasury yield. This federal statute ensures uniformity across federal courts. State laws also provide specific frameworks; for instance, California Code of Civil Procedure § 685.010 explicitly sets the post-judgment interest rate at 10% per annum. Compliance with these statutory provisions is not optional; failure to pay accrued post-judgment interest can result in further enforcement actions, as the interest is considered part of the judgment itself.

Frequently Asked Questions

What is post-judgment interest?

Post-judgment interest is the interest that accrues on a monetary award granted by a court from the date the judgment is entered until the judgment is fully paid. Its purpose is to compensate the prevailing party for the time value of money and for the delay in receiving payment. These rates are typically set by federal or state statutes, rather than by a negotiated agreement, and can vary significantly by jurisdiction, often ranging from 0% to 12% annually.

How is the post-judgment interest rate determined?

The post-judgment interest rate is typically determined by statute. For federal court judgments, the rate is set by 28 U.S.C. § 1961 and is tied to the weekly average 1-year constant maturity Treasury yield, published by the Federal Reserve. State courts have their own statutory rates, which can be a fixed percentage (e.g., California's 10%) or also tied to a benchmark like the prime rate or a state-specific index. The rate applicable is usually the one in effect on the date the judgment is entered.

Does post-judgment interest compound?

In most jurisdictions, post-judgment interest is calculated as simple interest, meaning it accrues only on the original judgment principal amount. It does not compound, so interest is not calculated on previously accrued interest. This differs from pre-judgment interest, which can sometimes be compounded depending on the nature of the claim and state law. Always verify the specific rules of the jurisdiction where the judgment was entered to confirm whether simple or compound interest applies.