Interest rates for security deposits for investor-owned utilities

Here, you can find security deposit interest rates for Massachusetts investor-owned utilities.

Current and historical interest rates

Effective Date	Interest Rate
January 1, 2025	4.37%
January 1, 2024	4.58%
January 1, 2023	2.99%
January 1, 2022	0.27%
January 1, 2021	0.39%
January 1, 2020	1.97%
January 1, 2019	2.53%
January 1, 2018	1.40%
January 1, 2017	0.83%
January 1, 2016	0.69%
January 1, 2015	0.46%

Pursuant to 220 CMR. 26.09(b), the rate of interest shall be the equivalent of the rate paid on two-year, United States Treasury notes for the preceding 12 months ending December 31 of any year.

All cash or cash-equivalent security deposits held for more than six months from the date of deposit shall be paid interest thereon, commencing from the date of payment to the date of refund.