Should you consolidate multiple debts into one installment loan? The answer depends entirely on the numbers — not feelings. Here's how to run the calculation yourself.
What Debt Consolidation Actually Does
Debt consolidation means taking out a single new loan to pay off multiple existing debts — typically credit cards, medical bills, or other installment loans. The goal is to replace several monthly payments with one, ideally at a lower weighted average interest rate.
It does not eliminate debt. It restructures it. The total amount you owe stays roughly the same; what changes is the rate, the payment schedule, and the payoff date.
When Consolidation Makes Mathematical Sense
Consolidation works when two conditions are met simultaneously:
- The new APR is lower than your weighted average current APR across all debts being consolidated.
- You can afford the new monthly payment without extending the term so long that total interest paid exceeds current trajectory.
The second condition is the one most people miss. A lower monthly payment achieved by stretching the loan to 60 months instead of 24 may cost more in total interest — even at a lower APR.
The Consolidation Math: A Worked Example
Suppose you have three existing debts:
Now compare to a $2,600 consolidation loan at 39% APR over 18 months:
In this example, consolidation costs $128 more in interest — but provides a fixed payoff date, simpler budgeting, and eliminates the risk of the medical bill going to collections. Whether that tradeoff is worth it is a personal decision, not a math one.
The cases where consolidation clearly makes financial sense are: (1) You're consolidating high-APR credit cards (20%+) into a lower-APR personal loan, or (2) You have multiple debts with different due dates that are hard to track, and the risk of a missed payment is high. The cases where it doesn't make sense: consolidating 0% promotional balances, or stretching a 12-month debt into a 36-month loan for a lower monthly payment.
When Consolidation Does NOT Make Sense
- You're consolidating a 0% promotional balance that hasn't expired yet
- The new loan has an origination fee that cancels out the interest savings
- You'd need to extend the repayment term significantly to afford the payment
- You haven't addressed the spending behavior that created the debt
- The new APR is higher than your current weighted average
Fees to Watch Before You Sign
Three fees that can erode consolidation savings:
- Origination fee (0%–8%): Deducted from loan proceeds before disbursement. On a $2,600 loan with a 5% origination fee, you receive $2,470. Check the 'Amount Financed' line in your TILA disclosure.
- Prepayment penalty: Should be $0. Walk away from any consolidation loan that charges you for paying off early.
- Late fee: Typically $15–$25 per missed payment. Set up automatic payments on day one.
How to Apply for a Consolidation Loan
The process is identical to applying for any personal installment loan. Calculate the total you need to pay off all target debts, apply for that amount, and — once funded — pay each creditor directly rather than depositing the funds and leaving them in your checking account.
Key: get payoff quotes from each creditor before applying, as balances change daily with interest accrual. Most creditors will provide a payoff-by-date quote over the phone or via online account.
One thing borrowers often overlook: closing old credit card accounts after consolidation can actually lower your credit score temporarily by reducing available credit. Consider keeping accounts open with a zero balance rather than closing them — especially accounts with a long history.
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