I am in Wenjiang District, Chengdu. I bought a suite in full before marriage, and I am going to get married and mortgage a suite immediately. Only I have housing provident fund. Will the interest be expensive? Interest is calculated according to how much you borrowed. The more loans, the longer the loan term and the more interest. Compared with commercial loans, the interest of provident fund loans will be much less, and the interest rate of provident fund loans is very low. You need to know how much you have borrowed and how many years you have borrowed, and you can work out the approximate interest rate.