Maine prejudgment interest rate
United States Maine’s official annual Treasury-linked prejudgment rate.
→ All Maine judgment & prejudgment interest rates
Formula value Formula rate
2026 Maine prejudgment interest at a glance
- Current rate
- 6.51% per year
- Effective date
- January 1, 2026
- Controlling authority
- 14 M.R.S. §1602-B
- Rate basis
- Formula value
- Source checked
- July 19, 2026
- Recorded history
- 24 data points
Maine prejudgment interest is currently 6.51% for interest beginning in 2026. Under 14 M.R.S. §1602-B, the general rate is the prior year’s last-full-week average one-year Treasury constant maturity yield plus 3 percentage points. The official Judicial Branch chart supplies one rate for each year; the dataset preserves all 24 rows from July 2003 through 2026.
When Maine prejudgment interest applies
For civil actions outside the small-claims and interest-bearing contract/note branches, §1602-B(3) allows the Treasury-plus-3 rate and does not state a liquidated-claim limitation. Small claims generally receive no prejudgment interest unless based on a contract or note with an interest provision; that writing supplies the rate for the contract/note branch.
When it starts accruing
Interest starts when a sworn notice of claim is properly served, or from filing if no such notice was given, and runs until judgment. A prevailing party’s requested continuance longer than 30 days suspends interest for the continuance; the court may fully or partially waive an award for good cause.
Simple or compound
Section 1602-B does not specify calculator-grade compounding or day-count mechanics. It does expressly prohibit adding prejudgment interest to the principal base on which post-judgment interest accrues. StatuteRates therefore withholds the Maine calculator rather than assume a method.
How the rate is set
The general rate is the weekly-average one-year Treasury constant maturity yield for the last full week of the calendar year immediately before interest begins, plus 3 points. The corrected official 2025 rate is 7.23%, not the 7.88% value initially published in error.
→ Compare with the Maine post-judgment interest rate (interest after judgment)
The Maine Judicial Branch publishes 6.51% for prejudgment interest beginning to accrue in 2026. Under 14 M.R.S. §1602-B, the general rate is the prior calendar year's last-full-week average one-year Treasury CMT plus three points. A contract or note with an interest provision uses its written rate; small claims generally exclude prejudgment interest unless based on such a writing. Accrual starts with qualifying sworn notice or, absent notice, filing, and can be suspended or waived. Prejudgment interest is excluded from the principal base for post-judgment interest. Not legal advice.
Effective-date history
| Effective date | Rate | Basis |
|---|---|---|
| January 1, 2026 | 6.51% | Formula |
| January 1, 2025 | 7.23% | Formula |
| January 1, 2024 | 7.88% | Formula |
| January 1, 2023 | 7.73% | Formula |
| January 1, 2022 | 3.29% | Formula |
| January 1, 2021 | 3.09% | Formula |
| January 1, 2020 | 4.53% | Formula |
| January 1, 2019 | 5.59% | Formula |
| January 1, 2018 | 4.76% | Formula |
| January 1, 2017 | 3.87% | Formula |
| January 1, 2016 | 3.65% | Formula |
| January 1, 2015 | 3.27% | Formula |
| January 1, 2014 | 3.13% | Formula |
| January 1, 2013 | 3.16% | Formula |
| January 1, 2012 | 3.12% | Formula |
| January 1, 2011 | 3.30% | Formula |
| January 1, 2010 | 3.41% | Formula |
| January 1, 2009 | 3.40% | Formula |
| January 1, 2008 | 6.42% | Formula |
| January 1, 2007 | 7.99% | Formula |
| January 1, 2006 | 7.36% | Formula |
| January 1, 2005 | 5.77% | Formula |
| January 1, 2004 | 4.28% | Formula |
| July 1, 2003 | 4.41% | Formula |
Source & provenance
Observation recorded July 19, 2026 (00:00 UTC) from the cited source (Maine Judicial Branch (official)):
https://mjbportal.courts.maine.gov/CourtForms/FormsLists/DownloadForm?strFormNumber=OTH-155
Cite this page
StatuteRates. “Maine Prejudgment Interest Rate.” StatuteRates.com. Accessed today. https://statuterates.com/rates/maine-prejudgment-rate/ Rate recorded under 14 M.R.S. §1602-B, effective January 1, 2026.