Payment Calculator
Calculate loan payments or find payoff time with fixed payments
How to Use This Payment Calculator
- Choose your calculation mode: Fixed Term (calculate payment) or Fixed Payment (calculate payoff time)
- Enter the loan amount you're borrowing or currently owe
- Input the annual interest rate
- For Fixed Term: enter the loan term in years to see required monthly payment
- For Fixed Payment: enter your monthly payment amount to see how long until payoff
- Review the amortization schedule and charts to understand payment structure
Example: Fixed Term: $30,000 loan at 7% for 5 years = $594/month, $5,644 total interest. Fixed Payment: Same loan with $700/month payments = payoff in 4 years 2 months, saving $1,100 in interest.
Tip: Use Fixed Payment mode to see how increasing your payment amount accelerates payoff and reduces total interest.
Why Use a Payment Calculator?
Flexible calculation modes let you approach loan decisions from either direction: what can I afford, or how fast can I pay this off?
- Determine the monthly payment required for a specific loan term
- Calculate how long to pay off debt at your current payment level
- See the impact of paying more than the minimum required payment
- Compare different payoff strategies for existing loans
- Plan loan consolidation by modeling combined balances and payments
- Budget accurately by understanding exact payment requirements
Understanding Your Results
The amortization schedule shows exactly how each payment splits between principal reduction and interest charges.
| Result | Meaning | Action |
|---|---|---|
| Interest > 50% of payment (early years) | Front-loaded interest | Normal for early loan years. Extra payments now save the most interest. |
| Interest 20-50% of payment | Balanced payments | You're making progress on principal. Keep consistent payments. |
| Interest < 20% of payment | Principal-focused payments | Most payment reduces balance. Extra payments less impactful now. |
| Payoff time extending beyond desired | Payment may be too low | Increase payment to accelerate payoff and reduce total interest. |
Meaning: Front-loaded interest
Action: Normal for early loan years. Extra payments now save the most interest.
Meaning: Balanced payments
Action: You're making progress on principal. Keep consistent payments.
Meaning: Principal-focused payments
Action: Most payment reduces balance. Extra payments less impactful now.
Meaning: Payment may be too low
Action: Increase payment to accelerate payoff and reduce total interest.
Note: Toggle between monthly and annual views in the amortization schedule to see either detailed or summary progression.
About Payment Calculator
Formula
M = P × [r(1+r)^n] / [(1+r)^n - 1] M = monthly payment, P = principal, r = monthly rate (annual rate / 12), n = number of payments. For Fixed Payment mode, we iterate to find n that reduces balance to zero.
Current Standards: Minimum payment must exceed monthly interest to make progress. At 7% on $10,000, minimum payment must exceed $58/month. Typical loan payments run 2-5% of principal monthly depending on term.
Frequently Asked Questions
What's the minimum payment that will pay off my loan?
Any payment above the monthly interest charge will eventually pay off the loan. Monthly interest = (Balance × Annual Rate) / 12. For a $20,000 loan at 8%, minimum to make progress is $133.33/month. However, at that rate, payoff would take over 30 years. Practical minimums are much higher.
How do I decide between a longer or shorter term?
Shorter terms mean higher payments but less total interest. Longer terms mean lower payments but more interest. Rule of thumb: choose the shortest term where payments don't strain your budget or prevent other financial goals. Having payment flexibility (choosing longer but paying more when possible) provides security while potentially saving interest.
Why does the principal portion of my payment increase over time?
Your payment stays constant, but interest is recalculated on the decreasing balance each month. As interest charges drop, the 'leftover' portion going to principal grows. This is why a $1,000 payment might be $700 interest and $300 principal initially, but $300 interest and $700 principal near the end.
Should I make bi-weekly instead of monthly payments?
Bi-weekly payments (half the monthly payment every two weeks) result in 26 half-payments or 13 full payments per year. That extra payment reduces total interest and shortens the term. On a $200,000 mortgage at 7%, bi-weekly payments pay it off about 4 years early and save ~$40,000 in interest.
How can I use this calculator for debt payoff planning?
Enter your current balance and rate, then experiment with the Fixed Payment mode. See how long at current payment, then try higher amounts to find payoff targets. For multiple debts, consider the avalanche method (highest rate first) or snowball method (smallest balance first). This calculator helps project individual loan payoffs.