Any assessment against benefited property not paid within thirty days of the due date shall thereupon be delinquent and shall be subject to interest from the due date at the same interest rate and in the same manner as provided by the general statutes in the case of delinquent taxes, provided, in the case of an assessment payable in installments, interest shall be computed on the entire unpaid balance of such assessment from the due date of the last installment which was paid, or from the due date of the assessment if no previous installment has been paid. Each addition of interest shall become, and be collectible as, a part of such assessment. Whenever any installment of an assessment becomes delinquent, any remaining unpaid installments of such assessment shall also become delinquent; provided, if all past due installments, together with interest and any other charges, have been paid in full, remaining installments may be paid without additional penalty, except for subsequent default, in accordance with the original installment schedule.