Credit Card Balance Transfer or Payoff Calculator

This calculator compares the estimated cost of paying off a credit card at its current APR with transferring the balance to a card offering an introductory 0% APR. Enter the balance, current APR, planned monthly payment, transfer fee, and promotional period to see the estimated payoff time and total cost for each option.

Formula

The calculator uses a simplified fixed-payment model. For the existing card, it estimates the number of monthly payments needed to repay the balance with monthly interest:

n = ceil[−ln(1 − rB/M) ÷ ln(1 + r)], where r = APR ÷ 1,200.

B is the starting balance in dollars, M is the monthly payment in dollars, APR is the annual percentage rate entered as a percentage, and n is the estimated number of months. The current-card total paid is M × n.

For the transfer, the starting amount is T = B × (1 + F/100), where F is the transfer fee percentage. The calculator assumes a 0% promotional APR for P months, then applies the entered current APR to any remaining balance. It estimates transfer payoff months as ceil(T/M). Its transfer-cost estimate is payments made during the promotion, capped at the amount owed, plus any remaining balance compounded monthly at the entered APR for the months left in the estimated payoff period.

This is a comparison model, not a statement about a particular card. It assumes the transferred balance earns 0% during the promotion and that the post-promotion APR equals the current card APR. Replace those assumptions with the actual offer terms before relying on the comparison.

Worked Example

Using the defaults: balance $5,000, current APR 24%, monthly payment $300, transfer fee 3%, and promotion period 18 months.

• Monthly rate for the existing card: 24 ÷ 1,200 = 0.02, or 2%.
• Existing-card payoff months: ceil[−ln(1 − (0.02 × $5,000 ÷ $300)) ÷ ln(1.02)] = ceil(25.79) = 26 months.
• Estimated existing-card total paid: 26 × $300 = $7,800.
• Transfer fee: $5,000 × 3% = $150, so the transferred amount is $5,150.
• At $300 per month, the transfer balance is paid in ceil($5,150 ÷ $300) = 18 months. The estimated total is $5,150, with no remaining balance after the promotional period.

Under these simplified assumptions, the transfer scenario costs $5,150 versus $7,800 on the current card. Actual payment schedules, offer conditions, fees, and the post-promotion APR can change the result.

Assumptions

• The current APR is fixed and interest compounds monthly at APR ÷ 12.
• Payments are made once per month and held at the amount entered; the model does not time payments within a billing cycle.
• The transferred balance has a 0% APR throughout the promotional period.
• After the promotional period, any remaining balance accrues interest at the entered current APR.
• The transfer fee is added to the balance at the start. Other fees, taxes, purchases, late payments, and changes in payment amount are not included.

Credit Card Balance Transfer or Payoff: How to Compare

A balance transfer moves eligible debt from one credit card to another, often under a temporary promotional APR. Paying off the existing card means continuing to repay that balance under its current terms. The central question is not simply whether the advertised introductory rate is 0%; it is whether the total cost and repayment timeline under the actual offer compare favorably with continuing payments on the current account.

A transfer commonly has a fee calculated as a percentage of the amount moved. The fee increases the amount you owe, even if the promotional APR is zero. For example, a 3% fee on $5,000 adds $150. If a card’s terms set a minimum fee, the actual fee may be higher than a straightforward percentage calculation for a small transfer. Check the offer disclosure for the exact calculation and eligibility conditions.

What the Calculator Can and Cannot Tell You

The outputs give a consistent, simplified comparison when you use the same monthly payment in both scenarios. They do not predict a card issuer’s billing statement. Real cards may calculate interest using daily balances, and a payment’s timing can affect the amount of interest. The calculator also assumes the promotional rate applies to the entire balance transferred and that you make every planned payment on time.

Use the model to understand how the balance, payment size, transfer fee, and promotional length interact. Then check the card agreement for the actual introductory period, transfer deadline, eligible balances, fee, post-promotion APR, and rules governing new purchases. A promotional transfer rate may apply to transferred balances but not to purchases; carrying both types of balances can complicate how payments are allocated. Do not assume new spending receives the same rate.

Choosing Which Scenario to Examine

Compare the expected payoff date with the end of the promotional period. If the planned payments do not clear the transferred amount before the promotion ends, estimate what happens to the leftover balance using the offer’s post-promotion APR—not automatically the current card’s APR. The calculator’s transfer cost assumes the current APR after the promotion, so change your interpretation if the offer specifies a different rate.

Check whether a transfer can be made from the card issuer you currently owe, whether the entire balance qualifies, and whether the transfer must be completed by a deadline. These are offer-specific details; a calculator cannot confirm approval, transfer eligibility, or the amount an issuer will accept. Avoid treating a projected savings figure as guaranteed.

Common Problems and Other Repayment Options

A transfer does not erase debt; it changes where the balance is held and may change the interest charged for a limited time. If the required monthly payment is too high to maintain, the balance may remain when the promotional rate expires. Repeated transfers can also involve additional fees and depend on qualifying for another offer, neither of which is assured.

• Keep paying the old card while a transfer is pending. A transfer can take time, and the existing account remains your responsibility until the balance is actually moved.
• Confirm the payment still covers interest. On a high-APR balance, a small payment may reduce principal slowly or fail to cover the modeled monthly interest.
• Consider alternatives for comparison. You can model a higher monthly payment, contact the current issuer to ask about available repayment arrangements, or compare a fixed-payment personal loan using its quoted APR and fees. Those options have separate terms and are not evaluated by this calculator.

Frequently Asked Questions

Is a balance transfer the same as paying off a credit card?
A transfer moves eligible debt to another account; it does not pay off the debt in the sense of eliminating what you owe. You still need to repay the transferred balance.

Does a 0% balance transfer mean there is no cost?
Not necessarily. A transfer fee may be added to the balance, and interest may apply if a balance remains after the introductory period. Check the offer’s full terms.

What if I cannot pay off the transfer before the promotion ends?
The remaining balance may accrue interest at the rate specified in the card terms. Estimate the remaining balance and post-promotion cost using that actual rate and the expected payment schedule.

Can I transfer the full balance from my current card?
Not always. The eligible amount depends on the offer and the receiving issuer’s decision, including any transfer limit. Confirm the amount and eligibility directly with the issuer.

Why does this estimate differ from my statement?
The calculator uses monthly compounding and level payments. Statements can reflect daily-balance calculations, payment dates, new transactions, fees, or changing rates, so their interest and payoff figures may differ.

The result is an estimate for education; the lender’s disclosure gives the exact figures.

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in bal | Balance to compare | $ | 5000 | 0.01 | 100000000
in apr | Current card APR | % | 24 | 0.01 | 100
in pay | Monthly payment | $ | 300 | 0.01 | 100000000
in fee | Balance transfer fee | % | 3 | 0 | 100
in promo | Promotional period | months | 18 | 1 | 600
out current | Current-card payoff months | months | ceil(round(-ln(1 - (apr / 1200) * bal / pay) / ln(1 + apr / 1200), 6)) + 0 * sqrt(pay - bal * (apr / 1200)) | 0
out oldcost | Current-card total paid | $ | pay * current | 2
out transfer | Transfer payoff months | months | ceil((bal * (1 + fee / 100)) / pay) + 0 * sqrt(pay * promo - bal * (1 + fee / 100)) | 0
out newcost | Transfer total paid | $ | min(pay * promo, bal * (1 + fee / 100)) + max(0, bal * (1 + fee / 100) - pay * promo) * (1 + apr / 1200) ^ (transfer - promo) | 2