You can ask your lender for an amortization schedule, but this might not be as helpful if you're looking to see how extra payments could impact that schedule.
=PMT(5%/12,3012,180000) The rate argument is 5% divided by the 12 months in a year. The NPER argument is 3012 for a 30 year mortgage with 12 monthly payments made each year.
Use the PMT function in Excel to create the formula: PMT(rate, nper, pv, fv, type). 1 This formula lets you calculate monthly payments when you divide the annual interest rate by 12, for the number of months in a year.