Why one payment can cost more
A consolidation loan does not erase the five balances; it pays them off and replaces them with a new balance. The new lender sets an interest rate and repayment schedule, and your monthly bill is calculated from both. If the new loan stretches repayment over more months, each bill may be smaller because the balance is being paid down more slowly—not because the debt has become cheaper.
Interest keeps accumulating on the unpaid principal. A lower rate can reduce that cost, but a longer term can offset the savings: you may spend more months owing money and pay interest for longer. The result depends on the rate, fees, and payoff schedule together.
Compare the whole repayment, not just the bill
Before replacing the loans, compare the total amount you would repay under each option, including origination or other loan fees. Check the annual percentage rate (APR), which reflects the interest rate plus certain borrowing costs, and confirm whether the rate can change. A low introductory rate or a smaller monthly payment alone does not show what the loan will cost over its full term.
Also check whether the new loan has a prepayment penalty and whether the old loans charge fees to close them. If you can afford larger payments, ask how much sooner the new balance could be cleared and how much interest that would save.
The balance can grow back
Once the original accounts are paid off, their available credit may look like room to borrow again. If new charges accumulate while the consolidation loan is still being repaid, you can end up with both the new loan and fresh card balances. Consolidation works best financially when the replacement loan lowers the overall cost and the paid-off balances stay paid off.
