Credit Card Payoff Calculator
Calculate how long it takes to pay off credit card debt and total interest.
Min. payment: max(2% of balance, $25)
Target Payoff Period
About this tool
A credit card payoff calculator helps you understand the true cost of carrying a balance and plan a realistic path to becoming debt-free. By entering your current balance, interest rate, and desired monthly payment, the tool calculates exactly how many months it will take to pay off your debt and shows you the total interest you'll pay along the way. This clarity is essential because credit card interest compounds daily, making it easy to underestimate how long repayment will take without proper planning.
To use the calculator, simply input your credit card balance, annual percentage rate (APR), and the amount you plan to pay each month. The tool instantly generates a payoff timeline showing your balance reduction month by month and the cumulative interest charges. This helps you decide whether to increase your monthly payment to save on interest, or if your current payment strategy is realistic given your budget. Many people discover they can save thousands of dollars by adding just $20β50 to their monthly payment.
This tool is particularly useful for anyone carrying multiple credit card balances, as you can calculate each card separately and prioritize which ones to pay off first. Understanding your payoff timeline also motivates faster repayment and helps you avoid accumulating new debt while working toward zero balance. Remember that the calculation assumes a fixed interest rate and consistent monthly payments; if your issuer changes your rate or you miss payments, the actual timeline may differ.
Frequently Asked Questions
Code Implementation
def payoff_simulation(balance, annual_rate, monthly_payment):
"""
Simulate credit card payoff month by month.
Parameters:
balance - current balance owed
annual_rate - annual interest rate (e.g. 0.20 for 20%)
monthly_payment - fixed payment made each month
Returns dict with months, total_paid, and total_interest.
"""
monthly_rate = annual_rate / 12
months = 0
total_paid = 0.0
total_interest = 0.0
while balance > 0:
interest = balance * monthly_rate
total_interest += interest
balance += interest
payment = min(monthly_payment, balance)
balance -= payment
total_paid += payment
months += 1
if months > 1200: # safety cap (100 years)
break
return {
"months": months,
"total_paid": total_paid,
"total_interest": total_interest,
}
def required_payment(balance, annual_rate, months):
"""
Calculate fixed monthly payment to clear a balance in exactly N months.
Standard amortization formula: M = P * r / (1 - (1+r)^-n)
"""
r = annual_rate / 12
if r == 0:
return balance / months
return balance * r / (1 - (1 + r) ** -months)
def min_payment(balance, min_percent=0.02, min_floor=25.0):
"""Return the minimum payment (2% of balance, at least $25)."""
return max(balance * min_percent, min_floor)
# Example: $5,000 balance at 20% APR, paying $150/month
result = payoff_simulation(5000, 0.20, 150)
print(f"Months to pay off: {result['months']}")
print(f"Total paid: ${result['total_paid']:,.2f}")
print(f"Total interest: ${result['total_interest']:,.2f}")
# Required payment to pay off in 24 months
payment = required_payment(5000, 0.20, 24)
print(f"\nRequired for 24 months: ${payment:,.2f}/mo")
# Minimum payment scenario
mp = min_payment(5000)
mp_result = payoff_simulation(5000, 0.20, mp)
print(f"Minimum payment (${mp:.2f}/mo) takes {mp_result['months']} months")
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