The mortgagor is bound to pay interest at the rate of _________ per annum, where no rate is fixed on…

Section 63A(2) of the Transfer of Property Act, 1882 concerns qualifying improvements made at the mortgagee’s expense, including those necessary to preserve the property or keep the security sufficient, or made under a lawful order of a public servant or authority. In the absence of a contrary contract, the mortgagor pays the proper cost as an addition to the principal with interest at the principal rate, or nine per cent per annum if no such rate is fixed. Any profits from the improvement are credited to the mortgagor.