A debt consolidation loan saves you money only when its all-in APR -- after any origination fee -- is meaningfully lower than the blended rate you pay now. If you swap 22% credit card debt for a 12% personal loan, you win. If the new loan's fees and a longer term push the real cost back up, you can pay more while feeling like you saved.
This guide shows the actual math so you can decide before you sign. Run your own numbers alongside it in the Loan Calculator.
What a consolidation loan really is
A debt consolidation loan is just a generic fixed-installment personal loan you use to pay off several higher-rate debts at once -- usually credit cards. You then make one fixed monthly payment instead of several. The loan itself does nothing magic; the only thing that matters financially is whether you traded a high interest rate for a lower one without giving back the savings in fees or extra time.
Two things decide if it saves money
- The rate gap. Your new APR must be below your current blended APR. The bigger the gap, the bigger the win.
- The term. Stretching the payoff over more years lowers the monthly payment but can erase the interest savings. Cheaper per month is not the same as cheaper overall.
The math when it clearly works
Say you owe $15,000 on cards at a blended 22% APR. You qualify for a personal loan at 12% APR over 36 months with no origination fee.
At 12% over 36 months, the payment is about $498.21, and you repay $17,935.73 total -- about $2,936 in interest.
Now compare that to staying on the cards but paying the same $498.21 each month. At 22%, it takes about 45 months and roughly $7,019 in interest. Same monthly payment, but the loan saves you about $4,083 and clears the debt nine months sooner.
| Scenario | Monthly payment | Months to clear | Total interest |
|---|---|---|---|
| Stay on cards at 22% | $498.21 | 45 | $7,019 |
| Consolidate at 12% (no fee) | $498.21 | 36 | $2,936 |
That ~$4,083 gap is the real value of consolidating. The lower rate plus the discipline of a fixed term did the work.
The trap: when the fee eats the savings
Personal loans often carry an origination fee -- commonly a percentage of the loan, deducted before you get the cash. That fee quietly raises your true cost above the advertised rate. (See how a stated rate differs from the all-in rate for the general idea.)
Back to the $15,000 example, this time the loan is still 12% over 36 months but charges a 6% origination fee. Because the fee comes out first, you must borrow about $15,957 to actually receive $15,000. That pushes the payment to about $530.02 and the total repaid to $19,081 -- roughly $4,081 of total cost on top of the $15,000 you needed.
It still beats the cards here, but the fee shaved real money off the win. If the new rate had been 16% instead of 12%, that same fee could have wiped out the benefit entirely. Always compare the loan's APR (which includes the fee) against your current rate -- never the nominal rate alone.
Your break-even check in plain English
Consolidation makes financial sense when all three are true:
- The new APR is clearly lower than your current blended rate (after the origination fee is included).
- You do not stretch the term so far that lower payments cancel the rate savings. Match the term to how fast you'd realistically pay anyway.
- You stop adding new debt. Consolidating cards and then running them back up is how a good move becomes a worse one.
Secured vs unsecured matters too
An unsecured personal loan has no collateral, so its rate is set mostly by your credit. A secured option -- like tapping home equity -- usually carries a lower rate but puts an asset at risk. A lower number is not automatically safer: turning unsecured card debt into debt backed by your house changes what happens if you can't pay. If you're weighing that route, model it in the Home Equity Loan Calculator and read how loan interest works first.
How to run your own numbers
Use the Loan Calculator for the proposed loan, then compare against your current debts in the Debt Payoff Calculator. If a card minimum is your real baseline, the Credit Card Payoff Calculator shows how long that path actually takes. For a neutral overview of how consolidation works, the CFPB's debt consolidation explainer is a solid reference.
Try it yourself
Run your own numbers in the free Loan Calculator — instant, private, no sign-up.
Open the Loan Calculator →Frequently asked questions
- Does a debt consolidation loan actually save money?
- It saves money only when the new loan's APR -- after any origination fee -- is clearly below your current blended rate, and you don't stretch the term so far that lower payments cancel the rate savings. Swapping $15,000 of 22% card debt for a 12% loan over 36 months saves about $4,083 in interest at the same monthly payment.
- How do I know if the rate is low enough to consolidate?
- Compare the new loan's APR, not its nominal rate, against your current blended interest rate. The APR includes the origination fee, so it reflects your true cost. If the APR is meaningfully lower than what you pay now, consolidation likely helps; if they're close, fees and a longer term can erase the benefit.
- Does the origination fee change whether consolidation is worth it?
- Yes. An origination fee is deducted before you receive the cash, so you borrow more than you need. On a $15,000 net at 12% over 36 months, a 6% fee raises the payment from about $498 to about $530 and total cost by roughly $1,100. Always judge the loan by its APR, which already includes that fee.
- Will consolidating hurt or help my total interest if I extend the term?
- Extending the term lowers your monthly payment but can increase total interest, even at a lower rate. Match the new loan's length to how fast you would realistically have paid the old debt. If you'd have cleared cards in 36 months, a 36-month loan captures the rate savings; a 60- or 72-month loan may give much of it back.
- Is a secured consolidation loan better because the rate is lower?
- Not automatically. Secured loans like home equity usually have lower rates, but they put an asset at risk -- you'd be converting unsecured card debt into debt backed by your home. The lower number only matters if you're confident you can repay. Weigh the rate savings against what's on the line if your income drops.
- Can I do the consolidation math myself before applying?
- Yes. Calculate the proposed loan's payment and total interest in the Loan Calculator, then compare it to paying the same amount toward your current debts in the Debt Payoff Calculator. If the loan clears the debt faster or for less total interest, it saves money; if not, it doesn't.
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