50-State Statutory Judgment Interest Calculator
Calculate pre-judgment and post-judgment interest accrual, exact daily per diem rates, and debtor payment credit allocations under the United States Rule across all 50 US state jurisdictions and Federal Court.
Judgment Parameters & Jurisdiction
Judgment Balance Accrual Over Time
Itemized Legal Payoff Accounting Ledger
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How It Works: Legal Calculations & The United States Rule
Judgment interest is statutory, not discretionary. Once entered by the court, it accrues by operation of law on a daily per diem basis until paid in full or vacated.
Under standard actual/365 day conventions, daily per diem interest is calculated directly from remaining unsatisfied principal (P) and statutory annual rate (r):
(\text{Per Diem} = \frac{P \times r}{365})
For a $50,000 judgment at 10.0%, daily interest accrues at $13.70 per calendar day.
For simple interest (standard across 48+ states including CA CCP § 685.010 and NY CPLR § 5004):
(I = \text{Per Diem} \times d = \left(\frac{P \times r}{365}\right) \times d)
For Federal Court under 28 U.S.C. § 1961 (which mandates annual compounding):
(A = P \times (1 + r)^y + \left(P \times (1 + r)^{\lfloor y \rfloor}\right) \times r \times \frac{d_{\text{rem}}}{365})
When a debtor tenders partial payments, the Supreme Court's mandate in Story v. Livingston, 38 U.S. 359 governs:
(\text{Interest Remaining} = \max(0, I_{\text{accrued}} - \text{Payment}))
\(\text{Principal Remaining} = P - \max(0, \text{Payment} - I_{\text{accrued}})\)
If a partial payment is less than total accrued interest, 100% goes toward interest and the principal does not decrease by even one penny.
5 Critical Legal Pitfalls & Judgment Collection Traps
In California and many other states, money judgments automatically expire and become completely unenforceable exactly 10 years after entry. If you fail to file an Application for Renewal of Judgment (Form EJ-190) prior to the 10-year expiration date, the judgment dies, all accrued interest is forfeited, and liens are extinguished.
Except in Federal Court or where explicitly granted by a valid pre-dispute contract, state courts strictly prohibit compound judgment interest. Attempting to add unpaid interest into the principal balance to compound future interest without a formal Court Renewal Order constitutes illegal usury and can jeopardize judgment enforceability.
Under California CCP § 683.110 and equivalent state renewal statutes, when you formally renew a judgment with the court, the new principal becomes the sum of the original unsatisfied principal plus all accrued interest and approved enforcement costs to date. From that renewal date forward, interest accrues on the entire new capitalized sum.
Costs incurred enforcing a judgment (sheriff execution fees, wage garnishment costs, bank levy fees, process servers) can be added to the judgment—but only if you claim them by filing a formal Memorandum of Costs after Judgment (Form MC-012) within two years of incurring the expense. If you miss the two-year deadline, those collection fees are permanently unrecoverable.
Statutory interest rates are frequently capped or reduced when the judgment debtor is a state or local public entity. In California, post-judgment interest against public entities is 7% (Cal. Const. art. XV, § 1). In New York, interest on judgments against municipal corporations is capped at 4% (Gen. Mun. Law § 3-a) and 3% against the State of New York (State Fin. Law § 16).
Frequently Asked Questions (Legal Judgment Interest)
What is statutory judgment interest?
Statutory judgment interest is the legal rate of interest assessed by law on a court-ordered monetary judgment from the date of entry (or from the date of breach/injury for pre-judgment interest) until the judgment debtor fully satisfies the debt. It compensates the prevailing party for the lost time value of money and deters debtors from delaying payment.
What is the difference between pre-judgment and post-judgment interest?
Pre-judgment interest accrues from the date a legal claim arises or a contract is breached up to the date final judgment is entered by the court, and is typically governed by specific statutory rates (e.g., 10% in California for breach of contract, 12% in Massachusetts). Post-judgment interest begins on the date the court enters the formal judgment and continues until the judgment is fully collected.
What is the 'United States Rule' on partial judgment payments?
The United States Rule (established in Story v. Livingston, 38 U.S. 359) is the foundational legal doctrine governing partial payments on debts and judgments. When a debtor makes a partial payment, the money is applied FIRST to satisfy all accrued interest to date, and only any remaining surplus is applied to reduce the judgment principal. Unpaid interest does not compound unless explicitly authorized by statute or contract.
Do judgment interest rates vary by state?
Yes, significantly. For example, California assesses a fixed 10% simple annual rate (CCP § 685.010); New York assesses 9% simple interest (CPLR § 5004); Texas uses a floating rate tied to the Federal Reserve prime rate with a 5% floor and 15% ceiling (currently 8.5%); Massachusetts assesses 12% simple interest; and Federal Court judgments use the weekly 1-year constant maturity Treasury yield compounded annually under 28 U.S.C. § 1961.
How long is a court judgment valid before it expires?
Court judgments have strict statutory lifespans, commonly 10 or 20 years depending on the jurisdiction (e.g., 10 years in California under CCP § 683.020, 20 years in New York under CPLR § 211(b)). If the creditor does not file a formal application for renewal before the expiration deadline, the judgment becomes unenforceable and all accrued interest is extinguished.
50-State Statutory Interest & United States Rule Formulation
Statutory legal interest calculations follow state civil procedure codes and the classical common-law United States Rule: