Calculate your monthly interest cost on a line of credit. See payoff time, total interest, and available credit based on your balance.
Line of Credit Calculator helps you make informed financial decisions using current rates and proven formulas. Adjust the inputs below to match your situation and see your personalized results update in real time.
Results are estimates only. Not financial advice.
🔒 Financial Disclaimer: These calculations are estimates for informational purposes only. Results are not financial advice. Consult a qualified financial advisor before making major financial decisions.
Calculations based on publicly available data from government agencies. Actual results may vary based on individual circumstances.
Personal loan rates — updated April 2026
| Lender | Rate | APR | Est. Payment | Action |
|---|---|---|---|---|
Fast Fund LendingBest Rate | 7.990% | 8.500% | $416/mo | Check Rate |
Direct Lender Plus | 8.490% | 9.000% | $422/mo | Check Rate |
Personal Loans Co | 9.490% | 10.100% | $434/mo | Check Rate |
Credit Builder Loan | 10.990% | 11.500% | $449/mo | Check Rate |
Rates shown are for illustrative purposes. Actual rates may vary based on credit score, loan amount, down payment, and market conditions. Contact lenders directly for personalized rate quotes.
The Line of Credit Calculator determines the cost of carrying a balance on a revolving credit facility, showing monthly interest charges, total interest paid, and time to pay off at different payment levels. The methodology calculates monthly interest using the balance times the monthly periodic rate (annual rate divided by 12), then applies the payment to principal. For lines of credit with variable rates tied to the prime rate, the calculator uses a fixed rate assumption. This tool helps borrowers understand the true cost of minimum payments on revolving credit and project how long it will take to pay off a balance at different payment levels. It demonstrates why paying only the minimum results in extended payoff periods and significant interest costs. The calculator is useful for evaluating HELOCs, personal lines of credit, and credit card balances to develop payoff strategies.
Result: Monthly Interest: $133. Months to Payoff: 44. Total Interest: $1,700.
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