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Loan Calculator

Choose how the loan is repaid — fixed monthly installments, a single lump sum at maturity, or a bond-style predetermined payoff — and see the full breakdown.

Repayment Type
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About the Loan Calculator

Model a loan under three repayment styles — fixed monthly payments, a single lump sum at maturity, or a bond-style predetermined payoff — and see the total interest and full balance breakdown for each.

How to use the Loan Calculator

  1. Choose a repayment type: Fixed Monthly Payments, Lump Sum at Maturity, or Bond / Present Value.
  2. Enter the loan amount (or the amount due at maturity, for the bond option).
  3. Enter the annual interest rate and loan term.
  4. For Lump Sum and Bond options, choose how often interest compounds.
  5. Press Calculate to see the payment, interest, and balance breakdown for the selected repayment type.

Tips for the Loan Calculator

  • With Fixed Monthly Payments, early payments go mostly toward interest — the principal portion grows as the loan matures.
  • With Lump Sum and Bond options, no periodic payments are made — interest compounds against the balance until maturity.

Example: Loan Calculator

A $10,000 loan at 6% for 5 years, fixed monthly payments

  • Loan amount: $10,000
  • Annual rate: 6% (illustrative)
  • Term: 5 years

Result: Monthly payment $193.33; total interest $1,599.68

Using the standard amortization formula with a monthly rate of 6% ÷ 12 = 0.5% over 60 payments, the loan is fully paid off with $1,599.68 in total interest.

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