What this calculator does

Model loan payments, compare offers, and see the full payoff story

This loan payment calculator helps you estimate regular payments, understand how amortization works, compare multiple financing options, and see how recurring extra payments or lump sums can reduce interest.

Calculator Live payment and payoff estimates

See payment amount, total interest, total paid, and payoff date update instantly as you edit assumptions.

Comparison Scenario-based decision support

Create several loan scenarios, duplicate them, and compare costs, timing, and savings in one place.

Reporting Portable records and print output

Export all scenarios as JSON, reload them later, and print a tidy PDF-ready loan report from the browser.

Quick guide

A calmer way to use the calculator

Start with the basics, then open the advanced sections only if you need them. The tool auto-saves on this browser as you work.

Step 1 Pick or create a scenario

Use the scenario manager to compare a few loan options instead of overwriting one set of assumptions.

Step 2 Enter amount, rate, and term

Those three inputs create your first useful payment estimate. You can add fees, extra payments, or notes afterward.

Step 3 Review results, then print or save

Once the numbers look right, compare scenarios, save a scenarios file, or print a clean PDF-style report.

Main calculator workspace

Build, save, and compare loan scenarios

Start with the default example, then create as many loan scenarios as you need for a careful comparison.

Scenario manager

Switch scenarios, duplicate options, and choose which ones to compare.

Save, load, and print

Your work auto-saves on this browser. Save a scenarios file when you want a backup or want to reopen it later.

Auto-save stays on this device and browser until you reset it.

Opening a saved scenarios file replaces the current scenarios after confirmation.

What gets saved?

Your scenarios file includes loan assumptions, extra payments, notes, selected comparison items, and calculator settings like currency.

1. Build a scenario

Amount, rate, and term create the first estimate.

2. Add extras if needed

Use recurring or one-time prepayments to test savings.

3. Compare or print

Pick scenarios to compare, then save or print the report.

Guided setup

Follow the setup path

Start with the core loan details to create your first useful estimate.

Open all calculator sections

Quick start

Core loan details

Enter the essentials first. These fields are enough to estimate payment, payoff timing, and total interest.

Scenario name Loan amount Annual interest rate (%) Term years Additional term months Payment frequency Monthly is the clearest default for most comparisons. More frequent payments can change payoff timing and total interest.

Most users only need the fields above. Open the advanced section only when your quote includes extra assumptions like fees or a specific compounding method.

Advanced assumptions and notes

Open this when you want to model compounding, fees, a start date, or notes from a lender quote.

Compounding If you are unsure, match your lender quote. Monthly is a practical default. Start date Upfront fees or costs Fees are added to total out-of-pocket cost but not financed into the balance. Scenario notes

Comparison state

Current comparison set

Keep this strip in view as your working context while you switch scenarios, review savings, and decide what to compare.

Results summary

Payment, payoff, and savings at a glance

Review the selected scenario first, then use the comparison area to stack up multiple loans side by side.

Charts

Balance and interest visuals

These charts show how the loan balance falls over time and how principal versus interest accumulates.

Loan balance over time, with and without extra payments when applicable.

Open the principal vs. interest chart

Cumulative principal and cumulative interest paid across the amortization schedule.

Comparison view

Loan comparison calculator output

Choose at least two scenarios to compare payment size, cost, timeline, and the effect of extra payments.

Metric
Selected scenarios

Amortization table

Detailed payment schedule

Every row shows the payment date, scheduled amount, extra payment, principal, interest, and remaining balance.

Preview mode shows the first 24 payments. Open the full schedule when you need every payment row.

#	Date	Scheduled	Extra	Principal	Interest	Balance

Print-friendly report

SimpleKit loan report

Use this section for a browser print or Save PDF flow. The print stylesheet removes editing controls and simplifies colours for paper.

A concise planning takeaway appears here.

Loan assumptions

Extra payment summary

Comparison summary

Scenario notes

Important note

This calculator is for educational planning. Lender calculations can vary because of contract terms, rounding rules, fee treatment, compounding conventions, and timing specifics. Confirm final numbers with the lender.

Learn

Understand amortization, comparison, and extra payments

These on-page explanations are here for both human readers and search engines looking for high-quality loan calculator content.

How loan payment calculations work

A loan payment calculator estimates the regular payment needed to repay a balance over a set term. Each payment typically covers interest first, then reduces principal. The exact split changes over time.

What amortization means

Amortization is the process of paying down a loan through repeated payments. Early payments usually contain more interest, while later payments shift more heavily toward principal as the balance falls.

Why extra payments matter

Extra payments reduce principal sooner. Because future interest is calculated on the remaining balance, even small recurring extras can lower total interest and shorten the payoff timeline.

How to compare loan offers

Compare more than the payment alone. A lower payment can still cost more over time if the term is longer, the rate is higher, or fees are larger. Look at total interest, total paid, and payoff date together.

How save and reload works

Use the JSON export button to save your scenarios to your device. Load that file later to restore your work, or rely on local auto-save to recover from an accidental refresh on the same device.

How to save as PDF

Use the Print / Save PDF button. Your browser print dialog can usually save the report as a PDF, preserving the summary, charts, comparison, and amortization content in a shareable document.

FAQ

Loan calculator frequently asked questions

These FAQs cover the most common questions about loan payment calculators, amortization calculators, and extra payment planning.

How is a loan payment calculated?

The payment is based on the loan balance, interest rate, term length, payment frequency, and compounding assumptions. With interest-bearing loans, each payment covers accrued interest plus some principal.

What is amortization?

Amortization is the schedule that shows how each payment is divided between interest and principal until the balance reaches zero.

How do extra payments reduce interest?

Extra payments lower the outstanding balance earlier, which reduces future interest charges and usually shortens the payoff period.

Can I save my loan scenarios?

Yes. Export all scenarios and calculator settings as a JSON file, then load the same file later to continue working.

How do I save the report as a PDF?

Use the Print / Save PDF button, then choose your browser’s PDF destination in the print dialog.

Loan Payment & Amortization Calculator