A personal or auto loan quote boils down to three numbers: how much you borrow, the annual percentage rate (APR), and the term in months. The monthly payment comes from the standard amortization formula — the same one behind EMIs and mortgages — and the total interest is simply (payment x months) minus the amount borrowed. Longer terms always lower the payment and raise the total interest; there is no free lunch, only a trade-off between monthly comfort and total cost. A 60-month loan feels easier than a 36-month loan every month, right up until you add up what you paid.
Shop on APR, not on the monthly payment: dealers and lenders can stretch a term to make any payment look affordable while quietly adding thousands in interest. The APR is the standardized cost measure — it must include most fees by law in many jurisdictions, which is what makes it comparable across lenders. Check whether the rate is fixed or variable, whether there are origination fees or prepayment penalties, and above all what the total cost of the loan is — that single figure is the honest price tag. For auto loans specifically, compare the loan's total interest against paying cash or buying a cheaper car: cars depreciate while loan interest compounds against you, so a long loan on a fast-depreciating car can leave you 'underwater' — owing more than the car is worth — for years. Never finance add-ons (extended warranties, paint protection) into the loan at dealership rates; they inflate the principal that every month's interest is charged on.