Author
BetterProduct Editorial Team
Loans allow you to access money now and repay it over time, but they come at a cost — interest. Understanding how loans work, how interest is calculated, and how to compare loan offers can save you thousands of dollars. Whether you're financing a car, consolidating debt, or covering an emergency, this guide covers everything you need to know.
BetterProduct Editorial Team
Checked against standard finance formulas and representative planning scenarios.
March 2026
Budgeting, comparisons, and what-if planning.
7 language editions aligned from the same source formulas.
Most loans use amortization — each payment covers accrued interest first, then reduces the principal. In the early months, most of your payment goes to interest. As the balance decreases, more goes to principal. This is why paying extra early in a loan saves the most interest.
Personal loans are unsecured (no collateral) and used for debt consolidation, home improvements, or emergencies. Auto loans are secured by the vehicle. Student loans fund education with special repayment options. Payday loans are extremely high-cost short-term loans to avoid. Each type has different rates, terms, and qualification requirements.
The interest rate is the cost of borrowing the principal. APR (Annual Percentage Rate) includes the interest rate plus fees, giving a more complete picture of the loan's true cost. Always compare APRs when shopping for loans. A loan with a lower interest rate but high fees may cost more than one with a slightly higher rate and no fees.
Your credit score is the biggest factor in your loan rate. A score above 750 typically qualifies for the best rates. Shop multiple lenders — banks, credit unions, and online lenders. Credit unions often offer lower rates than banks. Getting pre-qualified with multiple lenders lets you compare offers without hurting your credit score.