What is a non-repayable mortgage loan?

In this form of crediting real estate purchase, only interest on the loan is paid. The loan itself is not repaid, and there is no room here for saving to pay it off. The debt is the same for the entire time, unless it is voluntarily paid off. Repayment is possible up to a specific amount (usually up to 10% of the borrowed amount) annually, without a financial penalty.