Loan Calculator
Simulate any loan or financing: enter the amount, interest rate and term to see the monthly payment, total interest and the year-by-year amortization schedule. You can also compare fixed payments with the declining-payment system.
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How to use
- Enter the total value of the loan or of the asset being financed.
- If there is a down payment, enter it — the calculator subtracts it automatically.
- Enter the interest rate (monthly or yearly) and the term.
- Choose the payment system: fixed (Price), declining (SAC) or compare both.
How loan payments are calculated
In the Price system (also called French amortization, used in most personal loans and car financing), every payment is identical. Early payments are mostly interest; over time, a larger share goes to the principal. The formula is PMT = PV × i ÷ (1 − (1+i)⁻ⁿ).
In the SAC system (constant amortization, common in mortgage financing), you repay the same amount of principal every month, so payments start higher and shrink over time. Total interest is always lower than in the Price system for the same rate and term.
Price or SAC — which one is better?
SAC costs less in total interest, but the first payments are higher — it suits borrowers with room in their budget today. Price has smaller, predictable initial payments, which helps approval when the bank limits the payment to a share of your income. Use the "Compare both" option above to see the exact difference in your case before talking to the bank.
Tips before signing a loan
Always compare the total effective cost, not just the rate: insurance and fees can add several points. Simulate a shorter term — the payment rises less than you expect and the interest drops dramatically. And check the amortization table: knowing your balance each year is essential if you plan to pay the loan off early.
Frequently asked questions
What is the difference between Price and SAC?
Price has equal payments for the whole term. SAC repays the same principal every month, so payments start higher and decrease — and total interest ends up lower.
Should I enter a monthly or yearly rate?
Either — select the matching option. The conversion uses compound equivalence, the same method banks use.
Does the result include insurance and bank fees?
No. The simulation covers principal and interest only. Real contracts add insurance and administrative fees, so the bank payment will be slightly higher.
Which system do banks use for mortgages?
Most mortgage lenders offer both. SAC is the most common choice for long terms because total interest is much lower; Price is chosen when a smaller initial payment is needed.
Is my data sent anywhere?
No. Everything is calculated in your browser — nothing you type leaves your device.