New Jersey: Prejudgment Interest Rules
The short answer
New Jersey draws an unusually sharp line between claim types. Prejudgment interest is a mandatory right in a tort case, set by a Court Rule rather than a statute, running from the date the case was filed or six months after the claim arose, whichever is later. In a contract case there's no equivalent rule at all -- interest is entirely up to the court's discretion, guided by equitable principles rather than awarded as a matter of course. The tort rate matches New Jersey's ordinary post-judgment rate, reset every January 1 (4.5% for judgments up to $20,000 in 2026, 6.5% above that). A claim against a public entity or public employee draws NO prejudgment interest at all, in tort or contract, with only a narrow judicial-discretion exception for a construction claim against the state.
| Governing law | New Jersey is one of the few states that sets prejudgment interest by COURT RULE rather than legislative statute: N.J. Ct. R. 4:42-11(b) mandates it in tort actions. There is no equivalent rule or statute for contract claims -- interest there rests on judge-made equitable doctrine (Bak-A-Lum Corp. of America v. Alcoa Building Products, Inc., 69 N.J. 123 (1976)). Two separate Title 59 provisions set harsher rules against the government: N.J.S.A. 59:9-2(a) (tort claims) and N.J.S.A. 59:13-8 (contract claims) |
|---|---|
| Interest rate | Tort prejudgment interest uses the same formula as ordinary post-judgment interest under Rule 4:42-11(a): for a judgment at or under the Special Civil Part's monetary limit ($20,000), the annual rate resets every January 1 to the prior fiscal year's average return on New Jersey's Cash Management Fund, rounded to the nearest half-percent (4.5% for 2026); a judgment above that limit adds 2 points (6.5% for 2026). Contract prejudgment interest has no fixed rate at all -- a court exercising its equitable discretion often borrows the Rule 4:42-11(a) rate as a benchmark but isn't bound to it |
| When interest starts running | Tort: from the date the lawsuit was instituted, or from a date 6 months after the cause of action arose, whichever is LATER -- not from the date of injury itself. Contract: no fixed statutory start date; a court sets the accrual date (often the date of breach or demand) as part of its equitable analysis |
| Contract vs. tort claims | The line is sharper here than in most states: prejudgment interest is a mandatory entitlement in a tort action under Rule 4:42-11(b), but purely a matter of judicial discretion in a contract action, with no rule or statute requiring it at all. A court can decline interest on an otherwise-liquidated contract debt if the equities cut against it -- in Bak-A-Lum, the state's highest court denied a defendant prejudgment interest on its own counterclaim because of its inequitable conduct in the underlying dispute |
| Mandatory or discretionary | Tort: mandatory. Rule 4:42-11(b) says the court "shall" include prejudgment interest in the judgment, subject only to a narrow power to suspend it "in exceptional cases." Contract: fully discretionary -- awarded, if at all, "in accordance with principles of equity" rather than as a matter of course |
| Simple or compound | Simple interest only. Rule 4:42-11(a) states that judgments (and, by cross-reference, tort prejudgment interest calculated under the same rate formula) "shall bear simple interest" |
| Claims against the government | New Jersey bars prejudgment interest against a public entity or employee more broadly than most states, and does it twice -- once per claim type. N.J.S.A. 59:9-2(a) (the Tort Claims Act) bars ANY interest before judgment on a tort claim against a public entity or public employee. N.J.S.A. 59:13-8 (the Contractual Liability Act) separately bars it for a contract claim against the State, with one narrow exception: a court may, in its discretion and "in accordance with principles of equity," award prejudgment interest on a claim for the construction or installation of improvements to real property |
| Other exceptions | Tort prejudgment interest never applies to future economic losses (Rule 4:42-11(b)); a court may suspend the running of tort prejudgment interest altogether "in exceptional cases"; the tort/post-judgment rate steps up by 2 points once a judgment exceeds the Special Civil Part's $20,000 monetary limit; and the New Jersey Prompt Payment Act, N.J.S.A. 52:32-39, separately confirms that no prejudgment interest accrues on a disputed public-contract claim proceeding under its notice-of-claim process, cross-referencing § 59:13-8's bar |
Compare this rule across all 50 states + DC →
The short answer
New Jersey handles prejudgment interest differently depending on which court rule or statute the claim falls under, and it draws the line between contract and tort more sharply than most states. In a tort case, prejudgment interest isn't optional: a Court Rule -- not a statute passed by the legislature -- requires it, running from the date suit was filed or six months after the injury, whichever comes later, at the same rate New Jersey uses for ordinary post-judgment interest. In a contract case, there's no equivalent rule at all. Whether a contract plaintiff gets prejudgment interest, and from when, is left entirely to the trial court's discretion, guided by "principles of equity" developed in case law rather than dictated by any fixed formula. And if the defendant is a public entity or public employee, prejudgment interest is barred outright -- in a tort case AND (with one narrow exception for certain construction claims) in a contract case too.
Requirements one by one
Governing law
New Jersey is unusual in that its core prejudgment interest rule for tort claims, N.J. Ct. R. 4:42-11(b), is a rule the state Supreme Court adopted to govern court procedure -- not a statute the Legislature enacted. There's no comparable rule or statute for contract claims at all; contract prejudgment interest instead comes from a line of New Jersey Supreme Court cases holding that interest on a contract debt is awarded "in accordance with principles of equity," most notably Bak-A-Lum Corp. of America v. Alcoa Building Products, Inc. When the defendant is a government entity, two further, harsher provisions apply: N.J.S.A. 59:9-2(a) (part of the Tort Claims Act) for tort claims, and N.J.S.A. 59:13-8 (the Contractual Liability Act) for contract claims against the State.
Interest rate
Tort prejudgment interest doesn't have its own separate rate -- it uses whatever the state's ordinary post-judgment rate happens to be under Rule 4:42-11(a), recalculated every January 1. For a judgment at or below the Special Civil Part's monetary limit (currently $20,000), the rate equals the prior fiscal year's average return on New Jersey's own Cash Management Fund, rounded to the nearest half-percent -- 4.5% for 2026. For a judgment above that limit, add 2 percentage points -- 6.5% for 2026. Contract prejudgment interest has no rate fixed anywhere in a rule or statute; a judge exercising equitable discretion commonly uses the same Rule 4:42-11(a) rate as a reference point, but nothing requires it.
When interest starts running
For a tort claim, the clock starts on whichever comes later: the date the lawsuit was actually filed, or six months after the underlying cause of action arose. That six-month floor means a case filed unusually quickly after an injury doesn't start earning interest right away -- it still waits out the six months. For a contract claim, there's no rule-mandated start date; the court sets one (frequently the date of breach or of a demand for payment) as part of weighing the equities of the case.
Contract vs. tort claims
This is where New Jersey stands out. A tort plaintiff has an enforceable RIGHT to prejudgment interest under Rule 4:42-11(b) -- the rule says the court "shall" include it. A contract plaintiff has no equivalent right at all; interest is a matter of the trial judge's discretion, weighed against the equities of the specific case. That discretion cuts both ways: in Bak-A-Lum, New Jersey's Supreme Court denied a defendant prejudgment interest on its own otherwise-valid counterclaim because the defendant's own conduct in the underlying dispute made an interest award inequitable.
Mandatory or discretionary
Tort: mandatory. The rule uses "shall," and a court can only depart from it in "exceptional cases," where it may suspend interest's running -- a narrow safety valve, not a general discretion to deny interest altogether. Contract: the opposite -- fully discretionary, awarded only "in accordance with principles of equity" rather than as an automatic entitlement once damages are fixed.
Simple or compound
New Jersey uses simple interest across the board here. Rule 4:42-11(a) states plainly that qualifying judgments "shall bear simple interest," and tort prejudgment interest is calculated "in the same amount and manner" as that post-judgment rate -- so it's simple interest too, with no compounding.
Claims against the government
New Jersey shuts the door on prejudgment interest against the government more completely than most states, and does it separately for each claim type. A tort claim against a public entity or public employee draws no prejudgment interest at all -- N.J.S.A. 59:9-2(a) states flatly that "no interest shall accrue prior to the entry of judgment" against them. A contract claim against the State runs into a parallel bar under N.J.S.A. 59:13-8, with exactly one carve-out: a court may, using its own equitable discretion, award prejudgment interest on a claim for the construction or installation of improvements to real property -- meaning a state construction contractor has a narrow path to interest that other state contract claimants against New Jersey don't.
Other exceptions
A handful of narrower rules round out the picture. Tort prejudgment interest is never allowed on future economic losses -- only on damages already accrued by the time of judgment. A court can suspend tort prejudgment interest's running altogether "in exceptional cases," though this is meant as a narrow escape valve, not routine practice. The rate itself steps up by 2 percentage points once a judgment passes the Special Civil Part's $20,000 threshold. And New Jersey's Prompt Payment Act, N.J.S.A. 52:32-39, separately confirms that a disputed public-contract claim proceeding under its own notice-of-claim process still can't collect prejudgment interest, expressly pointing back to § 59:13-8's bar.
What trips people up
The biggest surprise for people used to other states is that New Jersey's tort prejudgment interest rule is a COURT RULE, not a statute -- and that there's no parallel rule for ordinary contract claims at all. A business owner suing over an unpaid contract can't point to a rule guaranteeing interest the way a personal-injury plaintiff can; they have to persuade the judge that the equities favor an award.
The six-month floor on tort accrual is easy to miss: interest doesn't necessarily start on the date the lawsuit was filed if that's less than six months after the underlying injury -- it waits until six months have passed from the injury itself, whichever date is later.
The government bar is broader than people expect: it isn't limited to torts. A contractor suing the State of New Jersey for breach of contract can't collect prejudgment interest either, except for the narrow construction/real-property-improvement carve-out -- a distinction that has actually been litigated (a contractor who won a large judgment against a state college was expressly denied prejudgment interest against the college itself, even while a companion defendant who wasn't a public entity could still owe it).
Common questions
Is New Jersey's prejudgment interest rate set by statute?
Only indirectly. The tort prejudgment interest requirement comes from a Court Rule, R. 4:42-11(b), which borrows its RATE from the same rule's ordinary post-judgment interest formula -- itself keyed to the return on the State's own Cash Management Fund, not a fixed statutory percentage.
Do I automatically get prejudgment interest if I win a breach of contract case in New Jersey?
Not automatically. Unlike a tort claim, there's no rule requiring it -- a court decides whether to award contract prejudgment interest, and from what date, based on the equities of the case.
Can I get prejudgment interest if I sue a New Jersey city or county?
No, if it's a tort claim -- N.J.S.A. 59:9-2(a) bars it outright. A contract claim against the State runs into the same kind of bar under a different statute, with a narrow exception only for certain construction-related claims.
What is New Jersey's current interest rate?
For 2026: 4.5% on a judgment up to $20,000, and 6.5% on a judgment above that amount. The rate resets every January 1 based on the prior fiscal year's Cash Management Fund return.
Statutes and sources
- N.J. Ct. R. 4:42-11(a)(1)-(3) (post-judgment interest formula) — quoted in full above. Accessed 2026-07-05: https://www.courtrules.net/new_jersey/nj-civil/rule-4-42-11
- N.J. Ct. R. 4:42-11(b) (tort prejudgment interest) — "the court shall, in tort actions ... include in the judgment simple interest ... from the date of the institution of the action or from a date 6 months after the date the cause of action arises, whichever is later." Accessed 2026-07-05: https://www.courtrules.net/new_jersey/nj-civil/rule-4-42-11
- Post-Judgment and Pre-Judgment Interest Rates notice (official rate table) — confirms the 2026 rates (4.5%/6.5%) and the mechanism. Accessed 2026-07-05: https://www.njcourts.gov/sites/default/files/courts/civil/postprejudgmentrates.pdf
- Bak-A-Lum Corp. of America v. Alcoa Building Products, Inc., 69 N.J. 123, 131 (1976) — "Interest does not run on liquidated claims as a matter of course, but 'in accordance with principles of equity.'" Accessed 2026-07-05: https://www.courtlistener.com/opinion/1437156/bak-a-lum-corp-of-america-v-alcoa-building-products-inc/
- N.J.S.A. 59:9-2(a) (Tort Claims Act) — "No interest shall accrue prior to the entry of judgment against a public entity or public employee." Accessed 2026-07-05: https://law.justia.com/codes/new-jersey/title-59/section-59-9-2/
- N.J.S.A. 59:13-8 (Contractual Liability Act) — quoted in full above (construction/real-property-improvement exception). Accessed 2026-07-05: https://codes.findlaw.com/nj/title-59-claims-against-public-entities/nj-st-sect-59-13-8/
- N.J.S.A. 52:32-39 (Prompt Payment Act cross-reference) — quoted in full above. Accessed 2026-07-05: https://law.justia.com/codes/new-jersey/title-52/section-52-32-39/
Source links
Every statute quoted above, linked, with the date we checked it.