Cambridge rents are among the highest in the country, and that turns a compliance detail into real money. A deposit equal to one month of Cambridge rent is a large sum, and the interest obligation on it is not a rounding error.

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Massachusetts rules that apply here
Scale changes the consequences of the same rules. Massachusetts requires 5 percent annual interest, or the actual interest earned if lower, paid to the tenant each year. On a portfolio of high-value units that is a material annual cash obligation, and it accrues per tenancy on each tenancy's own anniversary rather than on a portfolio-wide date. Managing it as an annual bulk exercise produces payments that are late for some tenants and early for others, and only the late ones carry consequences.
The treble damages exposure scales with the deposit too. A procedural failure on a modest deposit is a manageable problem; the same failure across a portfolio of large Cambridge deposits is a serious liability, and it does not require a tenant to have suffered any loss. The exposure attaches to the process, not to the harm, which is why the process has to be evidenced rather than merely intended.
We reconcile each deposit to its own account and its own tenancy, track the anniversary that drives the interest payment, and keep the receipt and disclosure trail with the tenancy record. That sounds administrative because it is, and administrative failure is precisely what the Massachusetts statute penalises.
Massachusetts operates the strictest deposit regime in the country. The deposit must be returned, or a compliant itemised statement provided, within 30 days of the tenancy ending, with 5 percent annual interest or the actual interest earned, whichever is less. THREE failures each trigger TREBLE damages plus interest, costs and attorney fees: not holding the deposit in a qualified separate interest-bearing account, not returning or itemising within 30 days, and not transferring the deposit to a new owner when the property is sold.
The deposit must sit in a SEPARATE interest-bearing account at a Massachusetts bank, held in the tenant's name, with a receipt to the tenant identifying the bank and account, plus a signed statement of condition early in the tenancy. This is not a single pooled trust account with a spreadsheet behind it, and an operating account holding deposits is a treble damages exposure before any dispute exists.
All Massachusetts requirementsHow we keep you inside it
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Because the deposits are large. Five percent annually on a portfolio of high-value units is a material cash obligation, and it accrues per tenancy on each tenancy's own anniversary rather than on one portfolio-wide date.
The exposure attaches to the procedural failure rather than to any harm suffered, which is exactly why the process has to be evidenced rather than merely intended.
Each deposit is reconciled to its own account and tenancy, with the interest anniversary tracked per tenancy and the receipt and disclosure trail kept against the tenancy record.
Other Massachusetts markets, the platforms we work in, and the functions available on their own.
Schedule a call and we will review your AppFolio setup, your Massachusetts deposit handling, and what it takes to close clean every month.