Tools · housing
Most of a new 30-year payment is interest. That is not a trick; it is the loan math. Related: how much house · refi vs extra principal · full mortgage calculator.
Monthly payment is standard principal and interest. Year-1 interest is the sum of the first twelve months on the declining balance, not loan × rate. Terms longer than 50 years stop at month 600. Taxes, insurance, and PMI are not in this schedule. The rate is whatever you type. Educational only.