However, calculating the overall savings of the 15-year note over the 30-year note depends on several individual circumstances, such as the borrower's changing income status.

Because there are 52 weeks in a year, the program results in 26 half-payments, or the equivalent of 13 monthly payments per year instead of 12. Using the biweekly payment system, a homeowner with a $70,000, 30-year biweekly mortgage at 10 percent interest could save $60,000 in interest and pay off the balance in less than 21 years.