Personal Loan for Debt Payoff: Payment Calculator

A personal-loan debt-payoff calculator estimates the monthly payment and total interest for a fixed-rate loan used to pay off debt. Enter the loan amount, annual percentage rate (APR), and term; the results are estimates based on equal monthly payments, not a recommendation to borrow.

Formula

The calculator uses the standard fixed-payment loan formula. Monthly payment = principal × monthly interest rate ÷ [1 − (1 + monthly interest rate)^{−number of payments}]. In symbols, Pmt = P × r ÷ [1 − (1 + r)⁻ⁿ]. Total interest is the displayed monthly payment multiplied by the number of payments, minus the amount borrowed.

• P is the loan principal in dollars: the amount borrowed for the payoff.
• APR is the annual percentage rate entered as a percent per year. The calculator converts it to a monthly rate, r = APR ÷ 1,200.
• n is the term in months: years × 12.
• Pmt is the estimated monthly payment in dollars.
• Total interest is an estimate in dollars, calculated using the payment rounded to cents and assuming every scheduled payment is made.

The formula assumes a fixed rate and equal monthly payments. The APR is an input, not a claim about rates available to borrowers. For a real offer, use the lender’s disclosed APR, loan amount, term, fees, and payment schedule; the calculator does not determine eligibility or approval.

Worked Example

Using the defaults—$20,000 principal, 8% APR, and a five-year term—first convert the APR to a monthly rate and the term to payments:

• Monthly rate: 8 ÷ 1,200 = 0.0066667.
• Number of payments: 5 × 12 = 60.
• Payment before rounding: 20,000 × 0.0066667 ÷ [1 − (1.0066667)⁻⁶⁰] ≈ $405.53.
• Total interest: $405.53 × 60 − $20,000 = $4,331.80.

The results are an estimated monthly payment of $405.53 and total interest of $4,331.80. Calculations use full precision in the payment formula, then round the monthly payment to cents for display; total interest uses that displayed payment, as specified by the calculator.

Assumptions

• The interest rate remains fixed throughout the loan term.
• Payments are equal, made monthly, and treated as on schedule.
• Interest compounds monthly at APR ÷ 12.
• Origination or other fees, taxes, insurance, and any separate charges are not included. If charges are financed, they may increase the actual amount borrowed.
• The estimate does not model a lender’s rounding, payment dates, late payments, extra payments, or changes to the balance from fees.

How a Personal Loan Can Pay Off Debt

Debt payoff with a personal loan generally involves borrowing a set amount and using the proceeds to pay one or more existing balances. The new loan has its own payment schedule and repayment end date. If it pays off revolving credit-card balances, those card accounts may still be available afterward; paying them off does not prevent new charges from creating additional debt.

For example, someone with $20,000 across several accounts could compare the amount needed to settle those balances with the loan amount and estimated payment. The example above does not show savings by itself: a meaningful comparison also needs the existing debts’ current balances, interest costs, required payments, remaining repayment periods, and any fees or payoff charges. A longer loan term can lower the scheduled payment while increasing the time interest accrues. A shorter term can raise the monthly payment while reducing the number of scheduled payments.

Check whether the amount borrowed would cover the actual payoff amounts, including any interest that accumulates before the old accounts are paid. The loan’s APR may include certain credit costs, but the calculator does not establish how a specific lender calculates APR or handles fees. Use the lender’s disclosure and payoff statements for the figures that apply to an actual transaction.

How to Compare the Costs

Compare the full repayment cost and the payment schedule, not just the monthly payment. A lower payment may result from a longer term rather than a lower overall cost. For an apples-to-apples review, collect the following for each existing debt and any loan offer:

• Current balance and a payoff amount dated for the expected payment date.
• Interest rate or APR, minimum payment, and whether the rate can change.
• Loan amount, APR, term, monthly payment, total of payments, and fees shown in the offer.
• Whether any fee is paid upfront or added to the loan balance.
• What happens if a payment is late or if the borrower pays extra, as described in the relevant account documents.

Do not compare a loan’s payment with only one card’s minimum payment when the loan would replace multiple balances. Add up the payments being replaced and consider how long they would continue under their existing terms. Minimum-payment amounts can change as balances decline, so a simple comparison may not reproduce the original accounts’ exact payoff path.

Common Risks and Limits

Consolidation changes the structure of debt; it does not erase it. If the old balances are paid and then rebuilt through new purchases, the borrower may owe both the personal loan and new revolving balances. A fixed payment also requires room in the monthly budget for the entire term. Missing payments can have consequences under the loan agreement, and this calculator does not model them.

Another misconception is that a personal loan necessarily costs less than credit-card debt. That cannot be concluded from the loan amount alone. The result depends on the actual APR, fees, repayment term, old balances, and how long those balances would otherwise take to repay. A longer term or financed fee can change the comparison. The calculator is arithmetic, not a prediction of approval, a credit-score effect, or an assessment of whether a particular repayment plan fits someone’s circumstances.

Frequently Asked Questions

Can I use a personal loan to pay off credit cards?
Some personal loans allow proceeds to be used to pay existing debts, but permitted uses and payment procedures depend on the lender’s terms. Confirm whether payments are sent to creditors directly or whether you must make them yourself, and check each account’s payoff amount.

Will a personal loan lower my monthly payment?
It may produce a lower scheduled payment in some cases, but this calculator can only estimate a payment for the loan inputs you provide. A longer term can reduce a monthly payment while increasing total interest. Compare the complete repayment schedules and costs.

Does debt consolidation remove what I owe?
No. A consolidation loan replaces or pays off old balances with a new obligation; the amount borrowed still has to be repaid, with any applicable interest and fees.

Should I include fees in the loan amount?
If a fee is added to the balance, include it in the amount borrowed for a closer payment estimate. If it is paid separately, the calculator’s payment does not include that out-of-pocket cost. Check the offer documents for how fees are collected.

Why might my lender’s payment differ from this estimate?
The actual terms may use a different APR, amount, term, payment date, fee treatment, or rounding method. The formula also assumes fixed monthly payments and does not include extra charges or unusual payment arrangements.

This result is an estimate for educational use; the lender’s disclosure gives the exact figures.

Related

• First Horizon Bank Loan Payoff Quote: How to Get One
• Loan Payoff Quote Calculator and Explanation
• Loan Payoff Graph: See Your Balance Over Time

in p | Loan amount | $ | 20000 | 1 | 100000000
in apr | Interest rate (APR) | % | 8 | 0.01 | 100
in yrs | Loan term | years | 5 | 0.0833 | 50
out pmt | Monthly payment | $ | p * (apr / 1200) / (1 - (1 + apr / 1200) ^ -(yrs * 12)) | 2
out int | Total interest | $ | pmt * yrs * 12 - p | 2