How to Use This Loan Calculator
Select your loan type at the top ??? Personal, Auto, or Student ??? then enter the loan amount, annual interest rate, and term. For auto loans, enter the vehicle price, down payment, trade-in value, and sales tax and the calculator will determine your financed amount automatically.
The Extra Monthly Payment field is one of the most powerful features: add any amount above your required payment to see how much interest you save and how many months you shave off the loan.
The Loan Payment Formula
Typical Interest Rates by Loan Type (2026)
Interest rates vary significantly based on your credit score, lender, and loan type:
- Personal loans: 6%???36% APR ??? excellent credit qualifies for 6%???12%, fair credit 15%???25%+
- Auto loans (new): 5%???10% APR ??? rates are lower because the vehicle serves as collateral
- Auto loans (used): 7%???15% APR ??? higher risk = higher rates for used vehicles
- Federal student loans: 5.5%???8.05% (2024-25 rates set by Congress annually)
- Private student loans: 4%???17% ??? variable rates may start lower but carry more risk
The Power of Extra Payments
Adding even $50???$100/month to your loan payment can dramatically reduce your total interest cost. On a $20,000 personal loan at 10% over 5 years, adding just $100/month extra reduces total interest by nearly $800 and pays off the loan 9 months early. Use the extra payment field above to see the impact on your specific loan.
Auto Loan: Total Financed Amount
For auto loans, your financed amount is typically: (Vehicle Price + Sales Tax) ??? Down Payment ??? Trade-In Value. Our calculator handles this automatically when you switch to Auto Loan mode. Dealer fees, registration, and documentation fees can add $500???$2,000 to the total ??? add these to the vehicle price for the most accurate result.
Frequently Asked Questions
What credit score do I need for a personal loan?
Most lenders require a minimum score of 580???640 for personal loan approval. Scores of 720+ typically qualify for the best rates. Below 580, you may need a secured loan, co-signer, or credit union. Credit unions often offer better rates than banks for borrowers with fair credit. Always compare APR (not just interest rate) since fees can significantly impact the true cost.
Should I choose a shorter or longer loan term?
Shorter terms mean higher monthly payments but far less total interest paid. Longer terms lower your monthly payment but cost significantly more over time. As a rule: choose the shortest term you can comfortably afford. For example, a $15,000 loan at 8% over 3 years costs $1,929 in interest. The same loan over 5 years costs $3,239 ??? nearly $1,300 more for the flexibility of lower monthly payments.
What's the difference between APR and interest rate?
The interest rate is the annual cost of borrowing the principal. The APR (Annual Percentage Rate) includes the interest rate plus origination fees, closing costs, and other lender charges ??? expressed as an annual rate. APR is always ??? interest rate and is a more accurate representation of the true loan cost. Always compare loans by APR when shopping around.
Can I pay off a loan early without penalties?
Many personal and student loans have no prepayment penalty. Auto loans occasionally do. Always check your loan agreement ??? a prepayment penalty is typically 1%???2% of the remaining balance. Even with a penalty, paying off early often saves money if the interest savings exceed the fee. Our calculator shows the interest saved by adding extra payments ??? compare that to any penalty before deciding.
What's the best way to reduce my loan interest cost?
In order of impact: (1) Improve your credit score before applying ??? even 30???50 points can save 2%???5% on your rate; (2) Choose the shortest term you can afford; (3) Make extra principal payments whenever possible; (4) Refinance if rates drop or your credit improves after taking the loan; (5) Make biweekly instead of monthly payments ??? you'll make one extra payment per year without noticing.
