It uses the same standard amortization formula banks use, so the math is exact. Your actual monthly debit may differ slightly if the lender adds processing fees, bundles insurance into the EMI, or uses different rounding — always compare against the lender's official loan schedule before signing.

A shorter tenure means a higher monthly EMI but far less total interest; a longer tenure lowers the monthly payment but substantially raises the total cost of the loan. A good approach: pick the shortest tenure whose EMI still fits comfortably (with buffer) in your monthly budget.

Interest is charged on the outstanding principal, which is largest at the start. As you repay, the outstanding balance shrinks, so each successive EMI contains a little less interest and a little more principal — that's what the amortization schedule shows month by month.

Your choice, usually — most lenders let you either keep the same EMI and shorten the tenure (saves the most interest) or keep the tenure and lower the EMI (eases monthly cash flow). If your goal is minimizing total cost, reducing tenure is almost always better.

Reducing balance (what this calculator uses, and what home loans use) charges interest only on what you still owe. Flat rate charges interest on the full original amount for the whole tenure — a "10% flat" loan is roughly equivalent to 17-18% reducing balance. Always ask which method a quoted rate uses.

No. All calculations run in your browser — the loan amount, rate, and tenure you enter never leave your device.