Carrying several credit cards, a personal loan, and a lingering medical bill at once means juggling due dates, minimum payments, and a stack of interest rates that rarely go down. Debt consolidation rolls those balances into a single new loan — ideally at a lower APR — so you make one payment instead of five. The question is not whether consolidation feels simpler, but whether the numbers actually work in your favor.
This calculator compares your current situation against a proposed consolidation loan side by side: it computes your weighted-average (blended) APR today, your new fixed monthly payment, your monthly cash-flow savings, and the total interest you would save over the life of the debt. Move the sliders and every figure updates instantly, so you can stress-test a 36-month vs. 60-month term or a 9% vs. 12% offer before you sign anything.
How to Use
- Enter the Total Current Debt — add up every balance you want to roll into the new loan. Do not include a mortgage or a car loan unless you are explicitly refinancing them into this consolidation.
- Set your Current Blended APR. The correct number is the balance-weighted average: multiply each debt's balance by its APR, add those products, and divide by total debt. A rough estimate is fine for a first pass — most people carrying $10k–$30k across cards land near 20%–24%.
- Type your Current Monthly Payment — the total you send toward these debts every month right now, not just the minimums.
- Enter the New Consolidation Loan APR you have been offered. If you have not applied yet, use a realistic estimate for your credit tier; many lenders pre-qualify with a soft pull.
- Choose the New Loan Term — 24, 36, 48, 60, 72, or 84 months. Longer terms shrink the bill but stretch out interest.
- Add the Origination / Fee percentage if the lender charges one (typically 1%–6%). Most lenders roll it into the principal, which this calculator does by default.
The result card then shows your new loan amount (fees included), the new monthly payment, the monthly savings versus your current bill, how long it would take to retire the debt at your current pace, and the total interest saved or lost by consolidating.
The Math Behind the Compare
The new monthly payment uses the standard amortization formula every US lender and every major bank uses:
M = P × r(1 + r)ⁿ / ((1 + r)ⁿ − 1)
Where P is the new loan amount (your debt plus any rolled-in fee), r is the monthly rate (APR ÷ 12), and n is the number of monthly payments. If the new APR is 0%, the engine simply splits P across n months.
To estimate how long your current payment would take to actually clear the balances, the engine inverts the same formula:
n = −ln(1 − P·r / M) / ln(1 + r)
where M is your current monthly payment. If M is not larger than the interest accruing in the first month (M ≤ P·r), the balance never shrinks — this is the "treadmill" scenario that minimum payments create, and the calculator flags it instead of returning a nonsense number.
Total interest under each path is then (monthly payment × months) − principal. The difference between the two totals is what consolidation actually saves you.
When Consolidation Saves You Money — and When It Doesn't
Consolidation is a win when three conditions line up:
- The new APR is materially lower than your blended rate. A drop from 22% to 9% on $25,000 saves roughly $12,000 of interest over five years. A drop from 22% to 18% barely moves the needle and may be wiped out by fees.
- The fee does not eat the savings. A 3% origination fee on $25,000 is $750 up front; if the loan saves you $12,000 over five years, that is fine. If it saves only $800, the fee turns the deal negative.
- You will not run the cards back up. Roughly a third of people who consolidate credit card debt end up with the cards and the new loan within two years. Close or freeze the cards after rolling them in.
Consolidation is usually not worth it when the new APR is only a few points lower, when the term is stretched so long that total interest rises even though the monthly bill falls, or when you are trading unsecured credit card debt for a home-equity loan secured by your house.
Examples
Example 1 — The classic credit-card win. You carry $25,000 across three cards at a blended 22% APR and send $650 a month. A lender offers a 60-month personal loan at 9% with a 3% origination fee. The new loan amount is $25,750; the new payment is $534.53. You keep paying $650 today, so the monthly cash-flow saving is $115.47. At your current pace you would spend about 67 months and $18,693 in interest to clear the cards; the new loan costs $6,322 in interest over 60 months. Net interest saved: $12,371.64.
Example 2 — The "lower bill, higher total" trap. Same $25,000 at 22%, but you stretch the new loan to 84 months at 11%. The monthly payment drops to about $460, but total interest climbs to roughly $13,700 — barely better than the status quo, and you are in debt seven years longer. Slide the term selector between 36 and 84 months to watch this trade-off happen live.
Example 3 — Six-figure debt load. A household carrying $1,200,000 across business lines of credit and high-balance cards at a blended 15%, paying $25,000 a month, refinances into a 60-month loan at 7% with a 2% fee. The new payment is $24,236.67 and total interest falls from about $644,000 to $230,000 — saving roughly $413,811 while slightly lowering the monthly outlay.
FAQ
Is debt consolidation actually worth it?
It is worth it when the new APR is at least 6–8 points below your current blended rate, the origination fee is under 5%, and you will not run the cards back up. Run your own numbers through this calculator: if the "Total Interest Saved" figure is positive and at least several times the origination fee, the math supports it. If monthly savings are positive but total interest saved is negative, you are just stretching the loan.
What is a good APR for a debt consolidation loan?
For borrowers with good credit (680+), personal-loan consolidation APRs typically range from 6% to 12%. Borrowers with fair credit may see 15%–20%, which is barely better than credit cards and usually not worth an origination fee. Balance-transfer cards offer 0% intro APR for 12–21 months but charge a 3%–5% transfer fee and spike to 24%+ after the intro period.
How is the blended APR calculated?
Multiply each debt balance by its APR, add those products together, then divide by the total balance. For example, $10,000 at 20%, $8,000 at 24%, and $7,000 at 18% gives a blended rate of (10,000×20 + 8,000×24 + 7,000×18) / 25,000 = 20.56%. This weighted average is the single number that best represents what you are really paying.
Does extending the loan term save money?
Usually it lowers the monthly payment but raises total interest. A 36-month loan at 9% on $25,000 costs about $3,600 in interest; a 60-month loan at the same rate costs about $6,300. The longer term is only a good deal if you need the cash-flow relief to avoid missed payments, or if you commit to paying extra toward principal every month.
What happens if I only make minimum payments?
Minimum payments on high-APR credit cards often take 15–25 years to clear a balance, and most of that time goes to interest. The calculator flags this when your current monthly payment is not large enough to cover a month of accrued interest — in that case the balance will never shrink, and consolidation into any positive-cash-flow loan is almost certainly the right move.
Are origination fees included in the comparison?
Yes. Most personal-loan lenders add a 1%–6% origination fee to the principal rather than charging it up front, so this calculator rolls it into the new loan amount. That way the new monthly payment and total interest reflect what you will actually pay, fee included. If your lender deducts the fee from disbursement instead, enter 0% here and subtract the fee from the balance yourself.
Will debt consolidation hurt my credit score?
The lender's hard credit pull typically drops your score by a few points for a few months. Opening a new account and closing old cards can also reduce your average account age. On the plus side, lowering your credit utilization and making on-time payments on the new loan usually improves your score within six to twelve months. Keep the old card accounts open (but frozen) to preserve your credit history length.
Disclaimer
This debt consolidation calculator is provided for informational purposes only and does not constitute financial, lending, credit, or tax advice. Estimates are based on the inputs you enter and the standard amortization formula; actual loan offers vary by lender, credit profile, location, and program. The "months to pay off at current pace" figure assumes your current payment stays constant, which minimum-payment schedules usually do not. Always compare written loan offers, read the fine print on prepayment penalties and late fees, and consult a non-profit credit counselor or licensed financial professional before committing to a consolidation loan.