Loan Payment Calculator
Choose the loan terms and repayment method on the left; the payment and total interest appear on the right, and the amortization schedule updates below.
Loan terms
Graduated basis
Increase mode
Increase interval
Loan details
Enter a loan amount to calculate automatically.
Payment summary
- Total interest
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- Total paid
- —
- Interest vs principal
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- Payoff term
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Results are general monthly estimates. Day-count rules, fees, insurance, taxes, variable rates and contract terms are not included.
Amortization schedule
ready to use.
- Visible firstKeep the input and result positions clear.
- Results firstPut the main number up front and keep the process secondary.
- Less to askNo sign-up or extra information before using the tool.
Reading monthly payments and total interest
Repayment structure changes both monthly cash flow and total borrowing cost.
This calculator uses a general monthly model; confirm the final figures in the lender agreement.
Set the common inputs first
Repayment structure changes both monthly cash flow and total borrowing cost.
- Reading monthly payments and total interest
Level payments trade simplicity for slower principal reduction
This calculator uses a general monthly model; confirm the final figures in the lender agreement.
- Reading monthly payments and total interest
Equal principal reduces the balance faster
Repayment structure changes both monthly cash flow and total borrowing cost.
- Reading monthly payments and total interest
Graduated repayment starts low and climbs
This calculator uses a general monthly model; confirm the final figures in the lender agreement.
- Graduated repayment starts low and climbs
Interest-only needs a maturity plan
Repayment structure changes both monthly cash flow and total borrowing cost.
- Interest-only needs a maturity plan
A grace period postpones principal
This calculator uses a general monthly model; confirm the final figures in the lender agreement.
- A grace period postpones principal
Compare extra payments with fees
Repayment structure changes both monthly cash flow and total borrowing cost.
- Compare extra payments with fees
Use the ratio to see total cost
This calculator uses a general monthly model; confirm the final figures in the lender agreement.
- Use the ratio to see total cost
Follow the balance in the schedule
Repayment structure changes both monthly cash flow and total borrowing cost.
- Follow the balance in the schedule
Check 0% and short-term boundaries
This calculator uses a general monthly model; confirm the final figures in the lender agreement.
- Check 0% and short-term boundaries
The contract is the final source
Repayment structure changes both monthly cash flow and total borrowing cost.
- The contract is the final source
Reading monthly payments and total interest FAQ
How is the monthly payment calculated?
The selected amortization method determines how principal and monthly interest are combined.
How do equal payment and equal principal differ?
Equal payment stays level; equal principal starts higher and usually produces less total interest.
What is a principal grace period?
Only interest is paid during the grace period; this tool applies it to equal-principal repayment.
How is an extra payment handled?
Principal is reduced at the selected payment and later interest is recalculated on the lower balance.
Can I enter a 0% rate?
Yes. The balance is then divided across the repayment months without interest.
Why are some schedule rows hidden?
Long schedules show useful checkpoints on screen; the download contains every payment.
Why can a lender quote differ?
Day counts, rounding, fees, insurance, rate changes and contract rules may differ.
Which currency does this page use?
The English page uses US dollars and US number formatting.
When is graduated repayment useful?
It suits borrowers who expect rising income. The first payment is lower, but later payments and total interest can be higher, so check the final payment and total interest.
What is the difference between graduated payment and graduated principal?
Graduated payment increases the entire monthly amount. Graduated principal only increases the principal portion, with interest calculated separately on the remaining balance.
Official references
Checked 2026-08-10. These official consumer resources explain general loan and amortization concepts; the lender contract controls actual costs.