Installment & Amortization Calculator

Build a complete repayment schedule for any loan or installment plan. Enter the amount, interest rate, and term to see the periodic payment, the principal/interest split of every installment, and the total cost of borrowing.

What is amortization?

Amortization is the process of paying off a debt in regular installments that cover both principal and interest. Early payments are mostly interest; later payments are mostly principal. An amortization schedule shows this breakdown for every payment.

Uses for businesses

Beyond loans, amortization schedules are useful for offering customers installment payment plans on large invoices — the schedule documents exactly what is due and when, including any interest charged.

Example schedule

$10,000 over 12 months at 6% annual interest:

Monthly payment: $860.66 · Total interest: $327.97 · Total repaid: $10,327.97

Frequently Asked Questions

Can I use it for customer payment plans?

Yes. Generate a schedule for any invoice amount and term to document an installment agreement.

Does it show principal vs interest?

Yes. Every installment is broken down into principal and interest portions.