How the consolidation comparison works
Two futures, simulated honestly. Current path: each debt is run month by month at the payment you're actually making until it hits zero — you're debt-free when the last one dies, and every dollar of interest along the way is counted. Consolidation path: your balances are rolled into one loan (plus the origination fee, which most lenders quietly finance into the principal rather than charge up front), amortized at the offer's rate and term into a single fixed payment.
Then the comparison table refuses to look away: monthly payment, months to debt-free, and total cost, side by side. Lenders advertise the first row. The verdict here is built on the third — because a lower payment and a lower cost are very different promises, and only one of them is guaranteed by a longer term.
The formula
M is the consolidation loan's monthly payment, r the monthly rate (APR ÷ 1200), and n the term in months. The fee is financed, so you pay interest on it too. Your current path needs no formula — it's simulated straight from your real payments, which also catches the case where a payment doesn't even cover a debt's monthly interest and the balance is growing instead of shrinking.
Worked example
Three debts: $6,000 at 24% (paying $180/mo), $3,500 at 19% (paying $105/mo), $2,500 at 12% (paying $150/mo) — $435/month total. Offer: 11% for 5 years with a 3% origination fee.
Current path: debt-free in 56 months with $5,750.29 of interest. Consolidation: principal becomes $12,000 × 1.03 = $12,360, payment $268.74/mo, total cost $4,124.18 including the $360 fee.
Verdict: $166.26/mo lower payment AND $1,626.11 less in total — even though the term runs 4 months longer, the rate cut from 24%/19% down to 11% overwhelms both the fee and the stretch. That's what a genuinely good consolidation looks like. Nudge that same offer to 7 years and watch the savings shrink — the term is doing the damage, not the rate.
The term-stretch trap
Here's the version the loan ad doesn't show. Say you owe $6,000 at 12% and you're paying an aggressive $400/month — done in 17 months, $533.65 of interest. A consolidation offer at 9% over 5 years sounds like a pure upgrade: the rate is lower! The payment drops to a soothing $124.55. But you'd now pay $1,473.01 over 60 months — $939.36 more than staying put, at a lower rate. You didn't buy savings; you rented a smaller payment, and the extra 43 months of interest is the rent. When this calculator catches that pattern, the verdict says so in plain words. A lower payment is sometimes exactly what a tight budget needs — that's a legitimate choice — but make it knowing the price tag.
When consolidation genuinely wins — and the one way to lose anyway
The good deals share three traits: the new APR is meaningfully lower (think 20%+ card debt down to a single-digit or low-teens loan), the term isn't longer than your current payoff pace — compare the months row, not your gut — and the origination fee doesn't eat the rate savings. If your balances are modest and your credit is decent, also price a 0% balance-transfer card (typically a 3–5% fee for 12–21 months of no interest); it often beats a loan for debt you can clear inside the promo window. No offer at all? The snowball/avalanche approach gets you debt-free with the debts you already have.
And the kind warning, because it's the most common way this goes wrong: consolidation moves your card balances to a loan, but it also leaves those cards sitting there at zero, feeling weightless. Run the balances back up and you're servicing the loan and fresh card debt — measurably worse off than before. If any part of the original problem was spending rather than rates, park the cards somewhere inconvenient before you sign. The loan fixes the price of your debt; only you fix the direction.