Stable Numbers
Loan Comparison Calculator
Compare two loans side by side. Enter the amount, APR and term for each, add optional extra monthly payments, and see the difference in monthly cost, total interest and time to clear.
Loan A
You can mix years and months.
Loan B
You can mix years and months.
Loan A results
Show amortisation schedule
| # | Date | Payment | Interest | Principal | Extra | Balance |
|---|---|---|---|---|---|---|
Final payment trims to clear the balance exactly. Minor rounding differences can occur.
Loan B results
Show amortisation schedule
| # | Date | Payment | Interest | Principal | Extra | Balance |
|---|---|---|---|---|---|---|
Final payment trims to clear the balance exactly. Minor rounding differences can occur.
Head to head
About this comparison
This page shows the practical difference between two loans without the noise. Each side uses the standard annuity method for fixed rate borrowing, which means the repayment stays the same each month while the split between interest and principal shifts over time. The interest part is highest at the start because the balance is largest. As the balance falls, the interest share falls with it and more of each repayment goes towards clearing the debt.
You can add an extra monthly payment on either side. This is applied on top of the standard repayment and goes straight to principal after interest is covered. Extra payments shorten the term and reduce the total interest. The final repayment is trimmed so you do not overpay in the last month. Results are rounded to two decimals for display. Real lenders may round at different stages which can move pennies.
The head to head summary gives you the answers you actually need. It shows which option carries the lower monthly cost, which one ends up cheaper overall, how much time you save and how much interest you save if you choose the better option. If both loans have the same monthly cost but different terms or extras, you will still see the total interest and time differences clearly. The share link captures every input so you can pass a setup to a colleague or revisit it later. The CSV export includes both schedules for your records or for a deeper review.
Use this for personal loans, car finance, debt consolidation and any decision where two offers look similar at first glance. Drop in the numbers, toggle an overpayment if you plan to make one, and read the line that matters. Clear, quick and reliable.
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