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The monthly payment is calculated using the amortization formula: M = P * (r(1+r)^n) / ((1+r)^n - 1), where P is the principal, r is the monthly interest rate (annual rate divided by 12), and n is the total number of payments. For example, a $20,000 loan at 6% annual interest for 5 years has r = 0.06/12 = 0.005 and n = 5*12 = 60. Plugging in: M = 20000 * (0.005(1.005)^60) / ((1.005)^60 - 1) = $386.66. This formula ensures the loan is fully paid off by the end of the term. The monthly payment remains fixed, but the portion going to interest decreases over time while the portion going to principal increases. You can use our loan calculator to verify this result.

Total interest is the sum of all interest charges over the loan term, while total paid is the sum of all monthly payments (principal + interest). For a $15,000 loan at 5% for 3 years, the monthly payment is $449.56. Total paid is $449.56 * 36 = $16,184.16. Total interest is $16,184.16 - $15,000 = $1,184.16. So total interest is the cost of borrowing, and total paid is the overall amount you'll pay back. When comparing loan offers, focus on total interest to see which loan costs less overall. A lower monthly payment might come with higher total interest if the term is longer. Use our loan calculator to compare scenarios.

A longer loan term lowers your monthly payment but increases total interest. For a $100,000 loan at 6%, a 15-year term gives a monthly payment of $843.86 and total interest of $51,894.80. A 30-year term gives a monthly payment of $599.55 and total interest of $115,838.19. The 30-year loan has a payment that's $244.31 lower, but you'll pay $63,943.39 more in interest. The trade-off is between affordability and cost. If you can afford the higher payment, a shorter term saves money. Use our mortgage calculator to see how different terms affect your specific loan.

Interest rates vary by loan type, credit score, and lender. As of 2025, average rates for a 30-year fixed mortgage are around 6.5% to 7.5%, auto loans for new cars are about 5% to 7% for good credit, and personal loans range from 6% to 36%. Your credit score heavily influences your rate. For example, a borrower with a 760+ credit score might get a 5.5% auto loan, while someone with a 640 score might pay 9%. A 1% rate difference on a $25,000 auto loan over 5 years changes the monthly payment by about $12 and total interest by over $700. Check with multiple lenders to get the best rate. Our auto loan calculator can help you estimate payments.

Yes, paying off a loan early can save you significant interest. When you make extra payments, more of your money goes toward principal, reducing the balance faster. For example, on a $200,000 mortgage at 5% for 30 years, the monthly payment is $1,073.64. If you pay an extra $200 per month, you'll pay off the loan in about 24 years and save over $50,000 in interest. However, some loans have prepayment penalties. Check your loan agreement for any fees. Also, make sure your lender applies extra payments to principal, not future payments. Use our mortgage calculator to see how extra payments affect your term and interest.

Compare loan offers by looking at the annual percentage rate (APR), total interest, and total paid. The APR includes both the interest rate and fees, giving a more complete picture. For example, Lender A offers a $30,000 auto loan at 5% for 5 years with no fees, so APR is 5%. Monthly payment is $566.14, total interest is $3,968.40. Lender B offers 4.8% but charges a $500 origination fee, so APR is 5.5%. Monthly payment is $563.64, total interest is $3,818.40, but you pay $500 upfront, making total cost $34,318.40 vs. $33,968.40 with Lender A. So Lender A is better despite the higher rate. Always compare total cost, not just monthly payment. Use our loan calculator to run these numbers.