Loan Payment Calculator

Know what you're signing up for before you sign. Monthly payment, total interest, total cost.

Loan Payment

Enter your loan details and we'll show you the real numbers.

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Enter your loan details and we'll show you the real numbers.

How to Use the Loan Payment Calculator

Enter the loan amount (principal), the annual interest rate, and the loan term in years. The calculator uses the standard amortisation formula to show you the fixed monthly payment, the total interest you'll pay over the life of the loan, and the total amount you'll have paid when the loan is fully repaid.

Understanding Your Results

The monthly payment is the fixed amount you owe each month. In the early months of a loan, most of each payment goes toward interest. As you pay down the principal, more of each payment goes toward the balance itself โ€” this is amortisation.

Total interest is the real cost of borrowing. On a long-term loan at a higher rate, total interest can approach or exceed the original loan amount. Seeing this number upfront is useful when comparing loan offers or deciding how much to borrow.

Ways to Reduce What You Pay

  • A shorter loan term means higher monthly payments but dramatically less interest overall.
  • Even a 0.5% difference in interest rate can save thousands over a long loan.
  • Making one extra payment per year reduces the loan term and cuts interest significantly.

This Calculator vs. Your Actual Loan

This tool uses the standard fixed-rate amortisation formula. Actual loan offers may vary based on fees, origination charges, or variable-rate terms. Use this calculator to understand ballpark figures and compare options โ€” always read the full loan agreement before signing.

Frequently Asked Questions

Monthly payment is calculated using the standard amortisation formula: P ร— (r(1+r)^n) / ((1+r)^n - 1), where P is the principal, r is the monthly interest rate, and n is the number of monthly payments.
Extra payments reduce your principal faster, which means less interest accrues over time. Even one extra payment per year can shave months off a 30-year mortgage and save thousands in interest.
The interest rate is the annual cost of borrowing the principal. APR includes the interest rate plus fees and other costs, giving a truer picture of the total loan cost. Use APR for comparing loans.
A common guideline is that total monthly debt payments shouldn't exceed 36% of your gross monthly income. For a mortgage specifically, lenders typically look for a housing payment under 28% of gross income.