// by seankriegler.com

Amortization Calculator

Full loan schedule with principal & interest breakdown, interactive charts, and extra payment analysis

Loan Amount ($)

Interest Rate (%)

Loan Term

Term Unit

Extra Monthly Payment ($)

Start Date

First payment date

Early Termination Date

Leave blank for full term

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Monthly Payment

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Total Paid

—

Total Interest

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Payoff Date

Cost Breakdown

Amortization Charts

Balance Over Time

Payment Breakdown

Cumulative Interest vs Principal

Amortization Schedule

// Amortization

Amortization is the process of paying off a loan over time through regular payments. Each payment covers interest first, with the remainder reducing the principal balance.

// Extra Payments

Adding even a small extra monthly payment can dramatically reduce your total interest and shorten the loan. Try entering $100–$500 above to see the difference.

// Interest vs Principal

Early in a loan, most of each payment goes to interest. Over time the ratio flips — by the end, nearly all of each payment goes to principal.

// Interactive Charts

Switch between balance curve, payment breakdown bars, and cumulative views to visualise exactly how your loan is repaid over time.