Estimate total repayment, monthly installments, and total interest for personal loans. Designed for loan applicants, budget planners, and anyone comparing borrowing options. Quickly see how loan terms and rates affect your total costs.
Personal Loan Cost Planner
Calculate monthly payments, total interest, and full loan costs
How to Use This Tool
Enter your loan details in the input fields: total loan amount, annual interest rate, loan term (with unit selection for years or months), and any upfront fees like origination charges.
Click the Calculate Costs button to see a full breakdown of your loan expenses, including monthly payments, total interest, and total repayment.
Use the Reset button to clear all inputs and start over. You can copy the results to your clipboard for easy reference.
Formula and Logic
This tool uses the standard amortizing loan formula to calculate monthly payments, which accounts for compound interest on personal loans:
Monthly Payment = P * (r(1+r)^n) / ((1+r)^n - 1)
Where:
- P = Principal loan amount
- r = Monthly interest rate (annual rate / 12)
- n = Total number of monthly payments (loan term in months)
Total interest is calculated as (Monthly Payment * Number of Payments) - Principal. Total repayment includes upfront fees added to the total of all monthly payments.
Practical Notes
Personal loan interest rates vary widely based on credit score, lender, and loan term. Rates for excellent credit can be as low as 6%, while subprime borrowers may see rates above 25%.
Shorter loan terms reduce total interest paid but increase monthly payments. For example, a 3-year $10,000 loan at 10% interest costs ~$1,616 in total interest, while a 5-year term costs ~$2,748.
Upfront fees like origination charges (typically 1-8% of the loan amount) are added to your total repayment but do not reduce your monthly payment. Always factor these into your budget.
Personal loan interest is not tax-deductible for most individuals, unlike mortgage interest. Consult a tax professional for specific advice.
Why This Tool Is Useful
It helps loan applicants compare offers from different lenders by standardizing cost calculations across varying rates and terms.
Budget planners can see exactly how a loan will fit into their monthly cash flow, avoiding overextension.
It eliminates manual calculation errors, which are common when estimating loan costs with spreadsheets or mental math.
You can test "what-if" scenarios, like how a 2% lower interest rate or shorter term reduces total costs.
Frequently Asked Questions
Does this calculator account for late fees or prepayment penalties?
No, this tool calculates base loan costs including principal, interest, and upfront fees. Late fees and prepayment penalties vary by lender and are not included in the results.
Can I use this for fixed-rate and variable-rate loans?
This tool is designed for fixed-rate personal loans, where the interest rate does not change over the loan term. For variable-rate loans, you can run calculations for different potential rates to estimate a range of costs.
How accurate are the results?
Results are accurate for standard amortizing personal loans with the inputs you provide. Always confirm final terms with your lender, as they may include additional fees not listed here.
Additional Guidance
Check your credit report before applying for a loan to get the best possible interest rate. A 50-point credit score increase can lower your rate by 1-3%.
Compare offers from at least 3-5 lenders, including banks, credit unions, and online lenders. Credit unions often offer lower rates to members.
Avoid borrowing more than you need, as higher principal amounts increase both monthly payments and total interest paid.
If you plan to pay off the loan early, check if your lender charges prepayment penalties, which can reduce your savings.