Loan Calculator

Monthly payments use the standard amortization formula: M = P[r(1+r)ⁿ] / [(1+r)ⁿ − 1], where P is the principal, r is the monthly interest rate (annual APR ÷ 12), and n is the total number of payments (years × 12). Each payment first covers the month's interest charge, with the remainder reducing the principal balance.

Personal loan rates are primarily driven by your credit score, income stability, debt-to-income (DTI) ratio, loan amount, and repayment term. Borrowers with FICO scores above 720 typically access rates in the 6–12% range, while those below 580 may face rates of 20–30% or higher. Shorter loan terms usually carry lower rates. Always compare pre-qualified offers from at least three lenders before committing.

The interest rate is the annual cost of borrowing the principal, expressed as a percentage. The APR (Annual Percentage Rate) includes the interest rate plus any lender fees (origination fees, closing costs), giving a more complete picture of the loan's true cost. For simple personal loans with no fees, APR and the interest rate are identical. When comparing loan offers, always compare APRs — not just stated rates.

Amortization is the process of paying off a debt through regular, equal payments over time. In a fully amortized loan, each payment is the same amount, but the composition changes every month. Early payments are mostly interest because the balance is high. As you pay down the principal, the interest portion shrinks and the principal portion grows. By the final payment, almost the entire amount is principal. The Schedule tab shows this breakdown year by year.

A "good" personal loan rate depends on current market conditions and your credit profile. Rates below 12% are generally considered competitive for personal loans. Borrowers with excellent credit (750+) often qualify for rates between 6–10%. Rates above 20% are costly — consider improving your credit score before borrowing, or explore secured loan options which typically offer lower rates.

Auto loans are typically secured (the car serves as collateral), which means lenders can offer lower rates than unsecured personal loans. Average new car loan rates are often 1–5% lower than equivalent personal loan rates. The trade-off is that the lender can repossess the vehicle if you default. A personal loan for a car purchase gives you more flexibility but usually at a higher rate. Use this calculator to compare the total cost of both options by adjusting the rate field.

The most effective strategies are: (1) Make extra payments — even small additional monthly payments significantly reduce your balance and total interest. (2) Pay bi-weekly instead of monthly — this results in one extra full payment per year. (3) Round up your payment — paying $400 instead of $387 adds up. (4) Make lump-sum payments when you receive a bonus or tax refund. Always confirm with your lender that extra payments go directly to principal, not future interest.

The total cost of a loan is the sum of all payments made — principal plus all interest charges. For example, a $20,000 loan at 6.5% over 5 years has a total cost of approximately $23,199: the $20,000 principal plus about $3,199 in interest. The longer the term and the higher the rate, the greater the total cost relative to the principal. The Breakdown tab in this calculator shows the total cost so you can see the full picture before committing.

Your credit score is the most influential factor in determining the interest rate you're offered. A score above 750 typically earns the best rates; 670–749 is good; 580–669 is fair with moderate rates; below 580 is subprime and may result in very high rates or loan denial. Improving your score by 50–100 points before applying can save thousands of dollars in interest over the life of a loan.

Federal student loans offer multiple repayment plans: Standard (fixed payments over 10 years), Graduated (lower payments that increase every two years), Extended (up to 25 years), and Income-Driven Repayment (IDR) plans that cap payments at 5–20% of discretionary income. Private student loans generally only offer standard amortization. This calculator models standard amortization, the most common structure for estimating total loan cost.

A secured loan requires collateral — an asset (car, home, savings account) that the lender can seize if you default. Secured loans typically offer lower interest rates because the lender has reduced risk. An unsecured loan (most personal loans) requires no collateral and is approved based on creditworthiness alone. Because the lender takes on more risk, unsecured loans usually carry higher rates. The decision depends on the asset you can offer and whether you're comfortable with the collateral risk.

This calculator is mathematically precise for the inputs you provide, using the standard amortization formula used by banks and lenders worldwide. Results may differ slightly from actual loan statements due to lender-specific origination fees, rounding rules, payment timing, and prepaid interest at closing. Variable-rate loans will behave differently after any rate adjustments. Always confirm final terms with your lender before signing any loan agreement.