πΈ Balance Transfer Calculator
Does the 0% offer actually save you money?
Interest saved minus the transfer fee
Estimates for planning only, not financial advice.
A balance transfer trades a certain upfront fee for interest savings during a 0% promo period. Move $8,000 from a 24.99% card to an 18-month 0% offer with a 3% fee: the fee is $240, the new balance is $8,240, and paying it off over the 18 promo months costs $457.78 a month. Keeping the $8,000 on the old card with the same 18-month payoff costs $9,674.91 total, including $1,674.91 of interest. Net savings: $1,434.91, as long as the balance is gone before month 19.
How to Use This Calculator
Enter your current balance and APR, the transfer offer's fee percentage and promo length, and the APR that applies after the promo. The calculator compares paying off over the promo months on the old card versus transferring, and shows the required monthly payment to clear the transfer in time.
Enter the balance and current APR. This sets the cost of doing nothing.
Enter the transfer fee, promo months, and post-promo APR from the offer terms. Watch for different issuers: same-bank transfers are usually barred.
Read net savings and the required monthly payment. If the payment exceeds your budget, transfer a smaller amount you can clear. For the debt-killing plan around it, use our credit card payoff calculator.
The Math
The comparison is apples to apples: same payoff horizon, two paths. The old-card path pays amortized interest at 24.99%; the transfer path pays the fee and zero interest. The fee is the price of admission, and it is worth paying whenever the interest saved exceeds it, which on high-APR cards takes only a few months to achieve.
Worked Example: $8,000 at 24.99%
Balance: $8,000. Current APR: 24.99%. Offer: 3% fee, 18 months at 0%, then 24.99%. Transfer fee: $240. New balance: $8,240. Required payment: $8,240 / 18 = $457.78 a month. Old-card 18-month payoff: $537.50 a month, $9,674.91 total, $1,674.91 in interest. Transfer path total: $8,240. Net savings: $1,434.91.
The failure mode: pay only $300 a month on the transfer. After 18 months you have paid $5,400, leaving $2,840 to face 24.99% in month 19, and the savings shrink dramatically. Worse, run up $2,000 of new spending on the old card and you now service two balances. The transfer is a tool for people with a payoff plan, not a pause button on debt.
Offer Shopping Checklist
| Term | Good | Watch out |
|---|---|---|
| Transfer fee | 3% or less | 5% on a big balance |
| Promo length | 18-21 months | Under 12 months |
| Post-promo APR | Under 20% | Penalty APR triggers |
| New purchases | Separate 0% or no purchases | Interest on purchases from day one |
Read the purchase-APR clause carefully: on many transfer cards, new purchases accrue interest immediately with no grace period while you carry the transfer. The safe play is zero new charges on the transfer card until the balance is cleared. One card for the transfer, everyday spending elsewhere, paid in full.
After the Transfer: The Payoff Plan
Automate the required payment the day the transfer posts, set for one month before the promo ends as your finish line, and freeze the old card (keep it open for credit history; lock it away physically). Track the promo expiration like a deadline, because it is one: calendar alerts at 90, 30, and 7 days out. If you cannot clear the full balance, have the next move ready before month 18, a personal loan or a second transfer, not a shrug.
For balances too big for any promo window, skip the card shuffle: a fixed installment loan at 10 to 14 percent with a real end date beats serial 3% fees and hard inquiries. Our debt consolidation calculator compares the loan path, and the debt payoff planner builds the month-by-month attack order for multiple balances.
Balance Transfer Traps
The 0 percent offer has four common catches. The transfer fee, usually 3 to 5 percent, is added to the balance on day one: a $10,000 transfer at 3 percent starts at $10,300. Deferred interest on some store cards retroactively charges interest on the whole original balance if a dollar remains at the promo end. New purchases often accrue interest immediately with no grace period while a transfer promo runs. And the promo rate can be revoked for a single late payment.
The discipline that makes transfers work is a written payoff schedule: divide the transferred balance by the promo months minus one, and autopay that amount. $10,300 over 17 months of an 18-month promo is $606 a month; miss it and the remaining balance reprices to 24 percent. Also resist the freed-up old card: the classic failure is transferring $10,000, then running the old card back up, ending with two debts instead of one. Retire the old card from your wallet, literally or figuratively.
Estimates for planning only, not financial advice.
Frequently Asked Questions
Is a balance transfer worth it?
When the interest saved exceeds the transfer fee. Moving $8,000 from 24.99% to an 18-month 0% offer with a 3% fee costs $240 upfront but saves about $1,435 in interest versus paying it off over the same 18 months on the old card. The fee is certain; the savings depend on actually paying it off during the promo.
How do balance transfer fees work?
The new card charges 3 to 5 percent of the transferred amount, added to the balance. A 3% fee on $8,000 is $240, making the new balance $8,240. There is rarely a dollar cap, so big transfers mean big fees. No-fee transfer offers exist but usually pair with shorter 0% periods.
What happens when the 0% promo ends?
Any remaining balance starts accruing interest at the card's regular APR, often 20% plus, and in the worst offers a single late payment can kill the promo early. The winning strategy is fixed monthly payments that clear the full balance a month before the promo expires: $8,240 over 18 months means $458 a month, every month.
Does a balance transfer hurt your credit?
Temporarily and mildly: the new card triggers a hard inquiry and lowers your average account age, but moving the balance can lower utilization on the old card, which helps. The real credit danger is behavioral: a cleared old card with available credit tempts new spending, which is how transfers become two balances instead of zero.
Can I transfer between cards from the same bank?
Usually no. Issuers bar transfers between their own cards (Chase to Chase, for example) because it just moves their risk around. You need cards from different issuers. Check the offer terms before applying; the restriction is always disclosed, always in the fine print.
How much should I transfer?
As much as you can reliably pay off during the promo period. Transferring $15,000 to an 18-month 0% offer requires $833-plus a month to clear; if your budget supports $500, transfer $9,000 and leave the rest. An oversized transfer that survives past the promo at 24.99% can cost more than never transferring.
What is the catch with 0% balance transfers?
Four catches: the upfront fee, the promo expiration cliff, the regular APR applying to new purchases on many transfer cards (pay those separately or don't make them), and the temptation to spend on the freed-up old card. The offer is genuinely good math if you automate the payoff and freeze new spending; it is a trap if you do neither.
Balance transfer vs personal loan for debt?
Transfers win on cost when you can clear the balance within the promo: 3% fee beats any loan rate. Personal loans win on discipline and timeline: fixed payments, fixed end date, and no promo cliff, usually at 8 to 15% for good credit. Big balances you cannot clear in 18 to 21 months usually belong on a loan, not a card. Compare with our <a href="/finance/personal-loan-calculator">personal loan calculator</a>.
How fast should I pay during the promo?
Divide the transferred balance (including the fee) by one fewer than the promo months and automate it. For $8,240 over 18 months, pay $486 a month to finish in 17, leaving a buffer month. Minimum payments are designed to leave a balance at the promo end; ignore them completely.
Can I do multiple balance transfers in a row?
Yes, serial transferring (hopping to a new 0% offer when one expires) is a known strategy, but each hop costs another 3 to 5% fee and another hard inquiry, and offers dry up if your credit weakens. It works as a bridge while you aggressively pay down; as a lifestyle, the fees compound into real money. Have a payoff end date, not just a transfer habit.