A mortgage repaid by biweekly payments. A biweekly payment is equal to one-half the regular monthly payment. This reduced payment is then paid biweekly or 26 times per year. Under this accelerated plan, the borrower pays off more principal than a borrower making monthly payments. Example: A $100,000.00, 30 year loan at 12% interest would have a monthly payment of $1,028.62. Making biweekly payments of $514.31 pays off the 30 year loan in 19 years and 2 weeks and saves $115,975.18 in interest.