The nine percent that accrues while the case is pending.

New York adds prejudgment interest to a contract award at nine percent per year, and no judge can cut it. CPLR 5004 fixes the rate. CPLR 5001 fixes the start date, which is usually the breach and not the filing. The clock runs while the case sits. A five-year case can carry interest approaching half the principal.

What is the prejudgment interest rate in New York, and can a judge reduce it?

The prejudgment interest rate in New York is nine percent per year under CPLR 5004(a), except where another statute or the parties’ own contract supplies a different rate. A judge in a commercial contract case cannot trim it to what the market pays. An action arising out of a consumer debt against a natural person carries two percent.

Law: CPLR 5004(a).

Read the exception clause literally. Nine percent applies except where otherwise provided by statute, and other statutes do provide otherwise. General Municipal Law 3-a caps interest on judgments and accrued claims against municipal corporations at nine percent, and at six percent for condemnation and wrongful death claims. An agreed contract rate can displace the statutory rate too.

The two percent rate came from a 2021 amendment that took effect in 2022. It is narrow. The proviso sits in CPLR 5004(a), and CPLR 5004(b) defines consumer debt as an obligation of a natural person to pay money arising out of a transaction for money, property, insurance or services primarily for personal, family or household purposes. A corporate supply contract is not that. A guaranty signed to backstop a business obligation is not that. If you are a business owner or a professional being sued over a commercial obligation, your number is nine.

Law: CPLR 5004(a), (b); General Municipal Law 3-a.

Statutory interest is simple, not compounded. Article 50 supplies no mechanism for compounding, and a court will not compound unless the parties clearly agreed to it. Even an agreement has a limit. A promise to pay interest upon interest is void if it was made before the simple interest accrued.

Law: CPLR 5001 through 5004; Giventer v. Arnow, 37 N.Y.2d 305 (1975); Spodek v. Park Prop. Dev. Assoc., 96 N.Y.2d 577 (2001).

When is prejudgment interest mandatory in a breach of contract case?

Prejudgment interest is mandatory in a New York breach of contract action. CPLR 5001(a) states that interest shall be recovered upon a sum awarded because of a breach of performance of a contract. The word is shall. Two things displace it: an action of an equitable nature, and contract language that clearly waives interest.

Law: CPLR 5001(a).

Understand what that means as a defendant. Interest is not a sanction for bad conduct. It is a component of the damages award, compensating the other side for the loss of use of money you held. So it attaches even to a modest recovery on a claim you mostly defeated. If a plaintiff sues for $2,000,000 and recovers $300,000, interest runs on the $300,000 from the accrual date, at nine percent, for every year the case was alive.

Therefore, model interest on the first day, not the last. The exposure number that matters is the award plus interest, and the second half of that sum grows on a schedule you do not control.

What date does the nine percent start running from?

The accrual date is set by CPLR 5001(b), which computes interest from the earliest ascertainable date the cause of action existed. In a contract case that is ordinarily the date of breach. It is not the date of the complaint, and not the date of a demand letter. Damages incurred later run from the date each item was incurred.

Law: CPLR 5001(b).

Three refinements do most of the work in real disputes.

• Installment obligations. Where a contract calls for periodic payments, interest runs on each missed payment from the date that payment came due. A promissory note with monthly principal and interest installments produces a separate accrual date every month, and each one is separately subject to the statute of limitations.
• Damages incurred at various times. CPLR 5001(b) permits interest on each item from the date it was incurred, or on all damages from a single reasonable intermediate date. That intermediate date is contestable, and it is often the cheapest fight in the case.
• Who fixes the date. CPLR 5001(c) requires the date to be specified in the verdict, report or decision. If a jury is discharged without specifying it, the court fixes it on motion. Where the date is certain and not in dispute, the clerk may fix it on affidavit, and the clerk computes the amount.

Law: CPLR 5001(b), (c); Spodek v. Park Prop. Dev. Assoc., 96 N.Y.2d 577 (2001).

The practical consequence is blunt. If you do not put the accrual date in dispute, the plaintiff proposes one, and the proposed date will be the earliest the record can bear. Two years of difference on a $750,000 claim is $135,000. That is a motion worth making, on a record you build in discovery.

Does interest stop when the verdict comes in?

Interest does not stop at the verdict. CPLR 5002 adds interest on the total sum awarded, including the interest already accrued to verdict, from the date the verdict was rendered or the decision was made to the date of entry of final judgment. CPLR 5003 then provides that every money judgment bears interest from its entry.

Law: CPLR 5002; CPLR 5003.

Read CPLR 5002 closely. Interest runs on the total sum awarded, including interest to verdict. The accrued interest is folded into the base once at verdict, and the whole figure carries forward when judgment is entered, because the entered judgment already contains it. The rate stays simple, but the base grows at two defined moments.

Does contesting the claim, or delay in the court system, reduce the interest?

Contesting a claim does not reduce New York prejudgment interest, and ordinary litigation delay does not either. The Court of Appeals upheld interest computed from the date of a liability determination even though the defendant was not responsible for the long delay in fixing damages. The reasoning is that the party holding the money had the use of it.

Law: Love v. State of New York, 78 N.Y.2d 540 (1991).

That decision arose under CPLR 5002 in a bifurcated personal injury claim against the State, but the Court of Appeals has carried the same reasoning into contract debt cases. It has said plainly that awarding interest does not penalize a debtor for exercising the right to contest the debt through litigation. It is the price of having held funds a court later says were not yours. Where delay arguments still have room to run is an action of an equitable nature, because there CPLR 5001(a) leaves the rate and the date to the court.

Law: Spodek v. Park Prop. Dev. Assoc., 96 N.Y.2d 577 (2001); CPLR 5001(a).

Every month the case sits, the plaintiff earns something without filing a single paper. Delay is an asset on the other side of the caption.

How large does interest get on a contract case that has been pending for years?

Nine percent simple interest adds nine percent of the principal every year, with no compounding and no ceiling short of judgment. On a $1,000,000 contract claim, that is $90,000 a year, or about $246 a day. Because New York gives a contract plaintiff six years from the breach to sue, accrual often starts long before service.

Law: CPLR 213(2); CPLR 5004(a).

At nine percent simple, accrued interest equals the principal in a little over eleven years. That span is not hypothetical where the breach predates the filing by years and the litigation runs four more. In 2024 the First Department awarded a nonbreaching purchaser interest at nine percent on a $626,250 down payment from November 12, 2015 through November 16, 2022. Seven years of accrual, added to the principal.

Law: IHG Harlem I LLC v. 406 Manhattan LLC, 2024 NY Slip Op 00164 (1st Dept 2024).

Can the contract waive prejudgment interest or set a different rate?

A contract can defeat or replace statutory prejudgment interest, but the language has to be clear. The Court of Appeals held that contract terms controlled and that the party seeking statutory interest was not entitled to it. The First Department held that a clause making return of a down payment the sole remedy was no clear waiver.

Law: J. D’Addario & Co. v. Embassy Indus., Inc., 20 N.Y.3d 113 (2012); IHG Harlem I LLC v. 406 Manhattan LLC, 2024 NY Slip Op 00164 (1st Dept 2024).

So pull the actual document. Not “the agreement” in the abstract. The asset purchase agreement, the promissory note, the personal guaranty, the settlement stipulation. Look for three things: a stated interest rate, a remedies clause, and any express waiver of statutory interest. Where a contract sets a rate that runs until the principal is paid, that rate governs instead of the statutory nine percent, which cuts both ways depending on what your document says.

Law: NML Capital v. Republic of Argentina, 17 N.Y.3d 250 (2011).

A generic “sole remedy” line will not do the job. Neither will silence. If your counterparty drafted a document that says nothing about interest, the statute supplies nine percent.

How should the nine percent change your settlement timing?

Nine percent changes settlement math because the plaintiff’s realistic recovery grows every day without additional work or proof. A strong defense loses settlement value over time, since the discount you earn on liability is applied to a larger number. Interest stops when the money is paid, not when you conclude the claim lacks merit.

Four consequences follow.

• Price the interest, then negotiate. A mediation number that ignores accrued interest is not a settlement number. Compute principal plus interest to a realistic judgment date, then discount for the defense.
• Early resolution avoids arithmetic. Settling in year one avoids interest that a year-four settlement has already generated. That saving is arithmetic, not a favor from the other side.
• Partial payment shrinks the base. Interest accrues on what is owed. If part of a claim is genuinely undisputed, carrying that portion for years at nine percent is a choice with a price tag.
• Pay promptly once you settle. CPLR 5003-a requires a settling defendant to pay all sums due within twenty-one days of tender of a duly executed release and a stipulation discontinuing the action. Municipal defendants, and the State and those it indemnifies, get ninety days. If payment does not come, the plaintiff may enter judgment for the amount in the release, plus costs and disbursements and interest from the date of tender.

Law: CPLR 5003-a.

The number you refuse today is not the number you will be offered in three years. Nine percent moves settlement value in exactly one direction.

What should you do in the first week after you are served?

Assume nine percent per year is already running against you from the date of the alleged breach, not the date you were sued. That assumption should shape the answer you file, the discovery you take, and the first settlement conversation you have. Five steps put a number on the exposure.

• Find the breach date the plaintiff will claim. Read the complaint for the earliest date on which it says performance failed. That is your presumptive accrual date under CPLR 5001(b).
• Do the multiplication. Principal times nine percent times projected years to judgment. Write the figure down. That number governs the decisions that follow.
• Pull the governing document. The note, the lease, the guaranty, the purchase agreement. Look for an interest rate, a remedies clause, and any waiver language.
• Identify a later accrual date and build proof for it. Installment obligations, damages incurred at various times, and a reasonable intermediate date are all live grounds. CPLR 5001(c) requires the date to be specified, which means it can be contested.
• Ask whether any part of the claim is equitable in nature. There the rate and the date sit in the court’s discretion under CPLR 5001(a). That is a different conversation than nine percent as of right.

Prencipe International is a New York commercial litigation firm on the defense side. Interest exposure belongs in the first assessment, not in an afterthought at judgment.