Formula Library
Debt & Loans Formulas
Calculate loan payments, interest costs, and payoff timelines for mortgages, credit cards, and other debt.
Amortization Schedule
advancedBuild a complete loan payment schedule showing principal, interest, and remaining balance for each payment.
=PMT(rate/12, periods, -principal) Credit Card Minimum Payment
beginnerCalculate how credit card minimum payments are determined and see why paying only the minimum costs so much over time.
=MAX(balance * 0.01 + monthly_interest, 25) Credit Utilization Rate
beginnerCalculate how much of your available credit you are using - a key factor in credit scoring - with Google Sheets formulas.
=total_balances / total_credit_limits Debt Avalanche Priority Order
intermediateUse SORT to rank your debts by interest rate from highest to lowest - the mathematically optimal payoff order.
=SORT(debt_range, rate_column, FALSE) Debt Payoff Date
beginnerCalculate the exact date when a debt will be fully paid off based on your current payment schedule in Google Sheets.
=EDATE(TODAY(), NPER(rate/12, -payment, balance)) Debt Payoff Timeline
intermediateCalculate how many months it will take to pay off a debt with fixed monthly payments using a simple spreadsheet formula.
=NPER(rate/12, -payment, balance) Debt-to-Income Ratio
beginnerCalculate your debt-to-income ratio in Google Sheets - a key metric lenders use and an important financial health indicator.
=total_monthly_debt / gross_monthly_income Extra Payment Impact
intermediateCalculate how much time and interest you can save by making extra payments on your debt with spreadsheet formulas.
=NPER(rate/12, -(payment + extra), balance) - NPER(rate/12, -payment, balance) Interest Saved by Extra Payment
intermediateCalculate exactly how much interest you save by adding extra to your monthly debt payment using Google Sheets formulas.
=(payment * NPER(rate/12, -payment, balance) - balance) - ((payment+extra) * NPER(rate/12, -(payment+extra), balance) - balance) Monthly Loan Payment (PMT)
beginnerCalculate the monthly payment required to pay off a loan with a fixed interest rate over a set number of periods.
=PMT(rate/12, periods, -principal) Total Interest Paid
beginnerCalculate the total amount of interest paid over the life of a loan using Google Sheets with practical examples.
=(PMT(rate/12, periods, -principal) * periods) - principal