Free Loan Amortization Calculator

The Loan Amortization Calculator is a free online tool that generates complete payment schedules showing how each loan payment splits between principal and interest.

Yes, it is completely free with no registration required. All calculations happen client-side in your browser.

The schedule shows each payment date, payment amount, principal portion, interest portion, and remaining balance for the entire loan term.

Absolutely. The Loan Amortization Calculator processes everything client-side in your browser. No data is uploaded to or stored on any server. Your content remains private on your device at all times.

Yes, the Loan Amortization Calculator is fully responsive and works on smartphones and tablets. You can use it on any device with a modern web browser -- no app download required.

No account or registration is needed. Simply open the Loan Amortization Calculator in your browser and start using it immediately. There are no sign-up walls or usage restrictions.

The Loan Amortization Calculator uses industry-standard formulas and algorithms to ensure accurate results. However, for critical financial or medical decisions, always consult a qualified professional.

Simply enter your input in the provided field, adjust any settings to your preference, and the tool will process it instantly. You can then copy the result to your clipboard or download it.

The Loan Amortization Calculator works in all modern browsers including Chrome, Firefox, Safari, Edge, and Opera. For the best experience, use the latest version of your preferred browser.

On an amortizing loan, interest is charged on the outstanding balance, and that balance is highest at the start. So your first payments are mostly interest with only a small slice reducing principal. As the balance slowly shrinks, the interest portion falls and more of each fixed payment attacks the principal, until the final payments are almost entirely principal. The total payment stays the same every period; only the split shifts. This is why a 30-year loan can build equity painfully slowly in the early years and why paying a little extra early has an outsized effect. This calculator makes the shift visible by listing the principal portion, interest portion, and remaining balance for every single payment, plus a chart showing the changing mix across the term.

Paying half your monthly amount every two weeks adds up to 26 half-payments a year, which equals 13 full monthly payments instead of the usual 12. That one extra payment each year goes straight to principal, reducing the balance faster than a standard monthly schedule and cutting both the total interest and the number of months you pay. On a long mortgage this can shave years off the term and save thousands, without dramatically changing your budget since the extra is spread across the year. The effect compounds because every dollar that lowers the balance also lowers all future interest charged on it. Switch the payment frequency to biweekly or weekly in this calculator and compare the payoff date and total interest against monthly to see exactly how much you would save.

Extra principal saves money because it permanently reduces the balance that future interest is calculated on, so the savings compound over the remaining term. Even an extra $50 to $100 a month can trim years off a long loan and save thousands in interest, with the biggest impact coming when you start early, while the balance and interest charges are largest. The exact amount depends on your rate, term, and how much extra you add, which is why a side-by-side comparison matters more than a rule of thumb. This calculator lets you add a recurring monthly amount, an annual lump sum, or one-time payments on specific dates, then reports two numbers directly: the total interest saved and the number of months knocked off your loan versus the original schedule.

A balloon payment is a large lump sum due at a set point in a loan, covering the entire remaining balance that has not been paid off through regular installments. Loans with a balloon are not fully amortizing: the periodic payments are calculated as if the loan were longer, keeping them lower, but the unpaid balance comes due all at once on the balloon date. You see this on some commercial loans, certain auto financing, and short-term arrangements where the borrower expects to refinance, sell, or pay the lump sum from another source. The risk is needing to produce a large amount on a fixed date. In this calculator you can flag the month a balloon comes due, and the schedule will show the regular payments leading up to it and the remaining balance you would owe.

This tool uses standard amortization math on the loan amount, annual rate, and term you enter, so it accurately models how principal and interest split over time. Your lender's statement often shows a higher total because the real monthly payment frequently bundles in property taxes, homeowners insurance, and PMI through an escrow account, none of which are part of pure amortization. Lender fees, a different day-count or compounding convention, or a rate that changes on an adjustable loan can also create small gaps. Treat the schedule here as a planning estimate of the loan's own cost rather than a full housing payment. To match a statement more closely, enter only the financed amount and the note rate, then confirm escrow and fee figures with your lender before making decisions based on the totals.