# Post-Judgment Interest Calculator

URL: https://speedycalculator.com/calculators/finance/post-judgment-interest/
Last updated: 2026-10-25

> The post-judgment interest calculator works out the interest that accrues on a court judgment from the judgment date until it is paid – simple interest at the statutory rate – the daily interest and the total due.

## Inputs

- Judgment amount
- Post-judgment interest rate (%)
- Judgment date
- Payment date
- Interest method
- Payments already made

## Results

- Days of interest
- Daily interest
- Interest accrued
- Total amount due

## Formula

```
Days = payment date − judgment date
Daily interest = judgment × rate ÷ 365
Interest = daily interest × days (simple interest)
Federal courts: rate = weekly average 1-year Treasury yield before the judgment, compounded annually
```

## Explanation

Each U.S. state sets its own post-judgment rate (often 6–12% or tied to a market rate); federal judgments use 28 U.S.C. § 1961. Check the rate that applies to your judgment – this calculator uses simple interest unless you choose annual compounding.

### How to use the Post-Judgment Interest Calculator

- **Judgment amount**
- **Post-judgment interest rate**
- **Judgment date**
- **Payment date**
- **Interest method**
- **Payments already made**

Results update as you type, and every field accepts the units shown in its menu.

### How it works

Enter the judgment amount, the interest rate, the judgment date, the payment date and the method.

### Tips

- Compare loans by APR and total cost, not just the monthly payment.
- Extra payments go straight to principal and can save a lot of interest.
- Pay off the highest-rate debt first if you want to save the most money.
- Check for prepayment penalties before paying a loan off early.

### Common mistakes to avoid

- Stretching a loan term to lower the payment without seeing the extra interest.
- Paying only the minimum on credit cards.
- Forgetting fees that are rolled into the loan.

### Inputs explained

FieldWhat to enterJudgment amountAmount in your currencyPost-judgment interest rateIn %Judgment dateA datePayment dateA dateInterest methodChoose one: Simple interest (most states), Compounded annually (federal)Payments already madeAmount in your currency

### What each result means

- **Days of interest** = max([Payment date] - [Judgment date], 0)
- **Daily interest** = [Judgment amount]×[Post-judgment interest rate]÷36500
- **Total amount due** = [Judgment amount] + [Interest accrued] - [Payments already made]

### Example values

How the main result changes when **Judgment amount** changes and everything else stays at the example values above:

Judgment amountInterest accrued25,0003,15037,5004,72550,0006,30062,5007,87575,0009,450100,00012,600

## Worked example

Inputs — Judgment amount: $50,000; Post-judgment interest rate: 9 %; Judgment date: 2025-06-01; Payment date: 2026-10-25; Interest method: Simple interest (most states); Payments already made: $0.

Results — Days of interest = 511; Daily interest = $12.33; **Interest accrued = $6,300.00**; Total amount due = $56,300.00.

## FAQ

**What is post-judgment interest?**
Interest that accrues on a court judgment until it is paid.

**What rate applies?**
It's set by state law or, for federal courts, 28 U.S.C. § 1961.

**Is it simple or compound interest?**
Usually simple; federal judgments compound annually.

**What formula does the Post-Judgment Interest Calculator use?**
Days = payment date − judgment date.


## Sources

- [U.S. Courts – Post judgment interest rates](https://www.uscourts.gov/services-forms/fees/post-judgment-interest-rate)