A 0% balance transfer can save thousands, or quietly cost you more. The difference comes down to three numbers: the fee, the promo length, and what you actually pay each month.
The calculator below runs the full comparison with your real numbers, including the trap most people miss: what happens to the leftover balance when the 0% window closes.
What you’ll learn
- Your exact savings, fee included
- Whether you finish inside the 0% window
- The payment that clears it before interest returns
- When a transfer is not worth it
- The four mistakes that erase the savings
Compare stay vs transfer
Enter your current debt and the transfer offer you are considering. Your inputs are saved in your browser.
Balance Transfer Savings Calculator
Compare keeping your balance where it is against moving it to a 0% card, fee included.
Your current debt
The transfer offer
Transfer or not, you still need the payoff plan. Debt Driver builds yours in two minutes.
Get My Personalized Plan →The math behind it
A transfer trades interest for a fee. You pay 3 to 5 percent of the balance up front to stop a 20-something percent APR for 12 to 21 months. Here is a worked example: $8,000 at 24% APR, paying $300 a month, against a 15-month 0% offer with a 3% fee:
| Path | Payoff time | Total cost |
|---|---|---|
| Stay at 24% APR | 3 yr 3 mo | $3,547 interest |
| Transfer (3% fee, 15 mo at 0%) | 2 yr 6 mo | $240 fee + $606 interest |
The transfer saves about $2,700 and finishes nine months sooner, at the exact same monthly payment. And if you can raise the payment to about $550 a month, you finish inside the window and the total cost drops to just the $240 fee.
When a transfer wins
Your current APR is 15% or higher
The higher your rate, the faster the interest savings outrun the fee. At card-typical APRs, the fee usually pays for itself within two to three months.
You can finish, or mostly finish, inside the window
Divide the transferred amount by the promo months. If your budget can get close to that payment, the transfer is working at full power.
The spending that built the balance is fixed
A transfer resets the interest clock, not the habits. If the old card recharges while you pay the new one, total debt grows and the transfer made things worse.
When it backfires
- Minimum payments through the promo – coast for 15 months, hit the cliff with 80% of the balance left, and the post-promo APR erases much of what you saved.
- New charges on the old card – the most common failure. Two balances now grow instead of one shrinking.
- A missed payment – many issuers can cancel the 0% rate after a late payment. Autopay at least the minimum from day one.
- Deferred interest offers – mostly on store cards: fail to clear the full balance and interest applies retroactively to the entire original amount. Read the terms.
- Repeat transfers as a lifestyle – rolling debt from card to card pays fee after fee without the balance shrinking. One transfer plus a real payoff plan beats serial surfing.
Transfer or not, the plan is what pays it off. Debt Driver builds yours around the promo clock.
Get My Personalized Plan →FAQs
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Open →Balance Transfer or Just Pay It Off?
The full decision guide with scenarios and traps.
Open →Pay It Off in One Year
The month-by-month plan to be done in 12 months.
Open →Beat the promo clock
Debt Driver builds your payoff plan around your real balances and dates, so the 0% window works for you instead of running out on you.
Get My Personalized Plan →Debt Driver is a debt payoff planning app. We are not a lender, credit card issuer, or credit-counseling agency, and we do not recommend or sell balance transfer cards. The calculator and tables above are illustrative and for educational purposes only; offer terms, fees, promo periods, and approval amounts vary by issuer and credit profile. Nothing here is financial, credit, or legal advice.