How to use this calculator
- Enter current debt balances, matching nominal annual rates (%), matching fixed monthly payments, new nominal annual rate (%), upfront fee financed into new loan, new loan months.
- Choose a display currency, then select Calculate. Results also update after a brief pause while you edit.
- Read the result with the assumptions below. Export details or save a second scenario to compare your choices.
Formula and method
Assumptions and limitations
Constant rates and fixed payments, no new spending, no payoff penalties. The fee is financed; lower payment may mean a longer and more expensive loan.
Worked example
Two zero-interest balances of 1,000 and 2,000 paid at 100 and 200 per month finish after ten months. A new zero-interest twelve-month loan for 3,000 has a 250 payment and no interest. This reduces the monthly commitment but extends repayment by two months; fees or interest change the comparison.
What the result means
Compare repayment costs and monthly commitments before replacing several debts with one loan.
Common questions
How is the calculation performed?
Sum each existing fixed-payment amortization cost; compare a new amortizing loan on balances plus financed fee.
What does the model leave out?
Constant rates and fixed payments, no new spending, no payoff penalties. The fee is financed; lower payment may mean a longer and more expensive loan.
Methodology and transparency
Calculation specification reviewed on 2026-10-14. Mathematical implementation is tested against independent reference fixtures. This does not imply review by a licensed financial professional. Read the testing and precision policy.