Debt Consolidation Calculator United States

Several credit cards, a store card and perhaps an old personal loan usually mean several due dates and several interest rates, some of them high. Debt consolidation replaces them with one loan and one monthly payment. This debt consolidation calculator shows what that payment would be, how it compares with what you pay across your debts today, and the total interest over the new loan’s term.

How the calculation works

Enter the total balance you want to combine, the APR quoted on the consolidation loan and the term in months. The calculator treats the loan as a standard fixed-rate, fully amortizing loan with the same payment every month until the balance reaches zero, found with the standard amortization formula. At a zero APR the payment is the balance divided by the number of months.

Each payment covers that month’s interest plus some principal, and the principal share grows as the balance falls. Credit card minimum payments, by contrast, are recalculated on a falling balance and can keep you in debt for decades. A consolidation loan gives you a fixed payoff date, which for many borrowers matters as much as the interest saved.

Reading the three results

The new monthly payment is what the consolidation loan costs each month. The monthly saving subtracts it from the total you currently pay across the debts you are combining: positive means more room in your budget, negative means the single payment is higher than your current total. Total interest on the new loan is what the consolidation costs over its full term, and it shows when a low payment comes from a long, expensive loan.

Read all three together. A large monthly saving with high total interest usually means the debt has simply been stretched out; a modest saving with low total interest is often the better result.

Why a lower payment is not always a win

Consolidation lowers a payment through a lower interest rate, a longer repayment period, or both. A lower rate always helps. A longer term eases cash flow now but keeps you in debt longer and can raise total interest even when the rate drops. A payment that falls by $150 a month can still cost more if the term doubled.

The best results come from moving high-rate credit card debt into a lower-rate personal loan while keeping the term as short as your budget allows. The payment falls because of the rate, not the term, so you pay less each month and less interest overall.

You can also keep paying close to what you pay now. If your cards cost $600 a month and the consolidation loan needs $483, putting the extra $117 toward principal each month clears the balance sooner and cuts interest further.

A worked example

Say you owe $15,000 across a few cards and pay about $600 a month between them. You are offered a consolidation loan at 9.9% APR over 36 months. The new payment is about $483, around $117 a month less, with total interest near $2,398 over three years. If your cards average well above 9.9%, consolidating lowers both the payment and the interest you were on track to pay.

Stretch the same $15,000 to 60 months at 9.9% and the payment drops to about $318, but total interest rises to roughly $4,100, about $1,700 more for the lower monthly payment.

Common mistakes to avoid

The biggest mistake is comparing the new payment with your credit card minimums instead of what you actually pay. If you were paying more than the minimum, a lower consolidation payment may slow you down. Another is ignoring fees: a 5% origination fee on a $15,000 loan is $750 taken up front, enough to cancel a modest saving on a short term. The most damaging is running the cleared cards back up, leaving you with the loan and new card debt.

Assumptions and limitations

This is a planning estimate. It assumes one fixed APR for the whole term, equal monthly payments, and no missed or extra payments. It does not include origination fees, balance-transfer fees or closing costs, so add those when you compare offers. It also assumes you add no new debt to the cleared accounts. Confirm the final numbers against your actual loan agreement.

About This Debt Consolidation Calculator

Use this debt consolidation calculator to get an instant estimate based on the figures you enter. Adjust the inputs above to match your situation, or browse all our calculators to plan your next step.