Massachusetts Judgment Interest Rate and Lifespan

The 12% Statutory Interest Rate

Massachusetts sets post-judgment interest at 12% per year under G.L. c. 235, § 8. This rate is mandatory and automatic — it begins accruing the day judgment is entered and continues until the debtor pays in full. Neither the court nor the parties can negotiate a different rate.

Twelve percent is high relative to most states. The Massachusetts Supreme Judicial Court confirmed in Green v. Philip Morris USA, Inc. that the statutory 12% rate is constitutional and not punitive. It exists to compensate the prevailing party for the time value of money during collection delays.

How to Calculate What the Debtor Owes

Post-judgment interest is calculated as simple interest (not compound) on the original principal judgment amount. The formula:

Interest = Principal × 0.12 × (Days Elapsed ÷ 365)

For a $4,500 judgment that goes unpaid for one year:

$4,500 × 0.12 × 1.0 = $540 in interest

After two years: $4,500 × 0.12 × 2.0 = $1,080 in interest

The total the debtor owes includes the original judgment, taxed court costs, and accrued interest. Here's how it builds for a typical case:

Interest accrues only on the original judgment principal, not on court costs or on previously accrued interest. Each year of non-payment adds another $540 to the balance in this example.

How Long a Judgment Lasts

Under G.L. c. 260, § 20, a Massachusetts judgment is enforceable for 20 years from the date of entry. That's one of the longer enforcement windows in the country.

This means that even if the debtor is judgment-proof today — no garnishable wages, minimal bank balance, property fully protected by exemptions — you have two decades to wait for their circumstances to change. People get new jobs, inherit property, open bank accounts, and accumulate assets over time.

Renewal and Execution Deadlines

While the judgment itself lasts 20 years, the tools you use to enforce it have shorter clocks:

• First Writ of Execution — Must be taken out within one year after you first become entitled to it (G.L. c. 235, § 17)
• Alias (successive) executions — Must be requested within five years from the return date of the preceding execution
• Real-estate execution liens — Under G.L. c. 236, § 4, the officer deposits the execution and memorandum forthwith if the land was not attached in the case; if it was attached, within 40 days after the execution date (70 days in specified Nantucket cases)

Missing an execution deadline doesn't kill the judgment. You can request a new execution as long as you're within the chain of alias execution windows and the underlying 20-year judgment hasn't expired.

Why This Matters for Collection Decisions

The combination of 12% annual interest and a 20-year enforcement window changes the math on whether to pursue a debtor who appears broke right now.

A $3,000 judgment grows to $10,200 over 20 years at 12% simple interest — the interest alone exceeds the original award. If the debtor buys a house, starts a business, or opens a substantial bank account at any point during that window, your enforcement options open up and the amount they owe has been growing the entire time.

The practical approach: obtain a Writ of Execution and have a deputy sheriff levy on the debtor's real property and deposit the execution and sheriff's memorandum at the Registry of Deeds under G.L. c. 236, § 4 (forthwith if the land was not attached in the case; otherwise, within 40 days after the execution date, or 70 days in specified Nantucket cases). Then monitor for changes — you can request a new payment review hearing whenever there's reason to believe the debtor's financial situation has improved.

The complete Massachusetts judgment collection guide includes a full interest calculator worksheet and covers every enforcement tool available across the 20-year judgment window.

See more Massachusetts guides →