Mass. Gen. Laws ch. 140D, § 4
(a) Except as otherwise provided in this section, the amount of the finance charge in connection with any consumer credit transaction shall be determined as the sum of all charges, payable directly or indirectly by the person to whom the credit is extended, and imposed directly or indirectly by the creditor as an incident to the extension of credit. The finance charge does not include charges of a type payable in a comparable cash transaction.
Charges which are included in the finance charge include any of the following types of charge or similar charge which are applicable.
(b) Charges or premiums for credit life, accident, health, or involuntary unemployment insurance written in connection with any consumer credit transaction shall be included in the finance charge unless:
(d) If any of the following items is itemized and disclosed in accordance with the regulations of the commissioner in connection with any transaction, then the creditor need not include that item in the computation of the finance charge with respect to that transaction:
(e) The following items, when charged in connection with any extension of credit secured by an interest in real property, shall not be included in the computation of the finance charge with respect to that transaction:
(f) In connection with credit transactions not under an open end credit plan that are secured by real property or a dwelling, the disclosure of the finance charge and other disclosures affected by any finance charge—
(1) shall be treated as being accurate for the purposes of this chapter if the amount disclosed as the finance charge—
(2) shall be treated as being accurate for the purposes of section ten if:—