Does this calculator include new purchases or cash advances?

No. It assumes you transfer a single existing balance and make no new purchases or cash advances on either card. New spending at different APRs can change how payments are applied and may reduce or eliminate the benefit of a transfer.

What if my payment is too low?

If your payment is so low that it doesn’t cover monthly interest after the promo period, the balance will not go down and payoff will never occur in the model. Increase your planned monthly payment until the calculator shows a finite payoff time for both scenarios.

Do all issuers apply payments the same way?

No. Many issuers apply payments to the highest APR balances first, but rules can vary and may change over time. This model assumes a single balance at a given APR in each scenario, which simplifies those allocation details.

Are annual fees and penalty APRs included?

No. Annual fees, late fees, and penalty APRs are not modeled. If your card charges these, they will increase your real‑world cost. Consider them when deciding whether to transfer a balance and how aggressively to pay it down.

Is a 0% balance transfer always the best option?

Not necessarily. The best offer depends on your balance, payment ability, transfer fee, promo length, and post‑promo APR. A lower fee with a slightly higher promo APR or a much longer promo can sometimes be better than a short 0% offer, especially if you need more time to pay.

finance calculator

Balance Transfer Calculator

Compare staying on your current card vs moving the balance to a promo balance transfer card with a fee, showing payoff time and interest saved.

Results

Transfer fee cost: $150
Months to payoff (current card): 27.00
Total interest (current card): $1,535
Months to payoff (transfer card): 22.00
Total interest (transfer card): $222
Interest saved: $1,312
Months saved: 5.00

Overview

See if a balance transfer with a promo APR actually saves you money after the transfer fee by comparing payoff time and total interest to staying on your current card.

Balance transfer offers can look attractive—0% or low promo APRs and slick mailers—but the transfer fee, promo length, and post‑promo APR all determine whether you truly come out ahead. This calculator simulates both paths using your real payment: keep paying on the current card vs move the balance to a promo card and pay the same amount.

It shows you payoff months, total interest, and interest saved (or lost) so you can make a clear yes/no call instead of guessing based on the intro APR alone.

How to use this calculator

Enter your current balance and your existing card’s APR.
Enter the promo APR and promo length (in months) for the new balance transfer card, along with the post‑promo APR.
Enter the transfer fee percentage that will be applied to the transferred balance and the monthly payment you can commit to on either card.
We simulate payoff on both the current card and the transfer card using your payment and show payoff months, total interest, transfer fee, interest saved, and months saved.
Review whether the transfer produces meaningful savings and how sensitive the result is to paying off the debt before or after the promo ends.

Inputs explained

Current balance: The amount you currently owe on your credit card that you are considering transferring. This should be the balance you would move, not your total combined credit card debt if you are only transferring part of it.
Current card APR (%): The annual percentage rate on your existing card for the balance being carried. You can usually find this on your statement or online account. High APRs make balance transfers more likely to save money.
Promo APR (%): The promotional interest rate on the new balance transfer card during the intro period. Many offers are 0% for a fixed number of months, but some are low single‑digit rates instead.
Promo months: How long the promo APR lasts, in months. After this period, the card switches to its regular post‑promo APR for any remaining balance.
Post-promo APR (%): The APR the new card will charge after the promo period ends. This is often similar to or higher than your current APR; it matters a lot if you won’t finish paying off the balance before the promo expires.
Transfer fee (% of balance): The balance transfer fee as a percentage of the amount transferred (for example, 3% or 4%). We apply this fee upfront by adding it to the transferred balance, which increases how much you must repay.
Planned monthly payment: The fixed amount you plan to pay each month toward this debt, regardless of which card you use. Higher payments generally mean faster payoff, lower interest, and a better chance of fully using the promo period.

How it works

We simulate fixed monthly payments on your current card at its APR until the balance is paid off, tracking how much goes to interest vs principal each month and summing total interest paid.

For the transfer scenario, we add the upfront transfer fee to the starting balance, then simulate the same monthly payment: first using the promo APR for the promo period, and then the post‑promo APR until payoff.

Both simulations assume no new purchases, cash advances, or fees beyond the transfer fee, so we’re comparing apples to apples on a single balance.

Savings (or loss) = total interest on the current card − total interest on the transfer card. Months saved = payoff months on the current card − payoff months on the transfer card.

If the payment you enter is too low to ever pay down principal after the promo ends (for example, it doesn’t cover monthly interest), the payoff time is effectively infinite; the tool flags this so you know the payment must increase.

Formula

Monthly interest charge ≈ Balance × (APR ÷ 12).\nWe simulate month by month: New balance each month = Previous balance + Monthly interest − Payment (never below zero).\nTransfer fee = Balance × (Fee% ÷ 100), added upfront to the transferred balance.\nPromo phase uses Promo APR for `promoMonths`; afterwards, we switch to Post‑promo APR for the remaining balance.\nTotal interest (scenario) = Sum of all monthly interest charges over payoff period.\nInterest saved = Total interest (current card) − Total interest (transfer card).

When to use it

Checking whether a 0% intro card saves more in interest than the transfer fee costs, given your actual payment and payoff timeline.
Choosing between two or more promo offers that have different combinations of fee, promo length, promo APR, and post‑promo APR.
Estimating whether you can pay off the transferred balance before the promo expires if you stick to your planned payment.
Exploring how increasing your payment during the promo period (even temporarily) changes the payoff time and interest saved.
Avoiding balance transfers that look attractive but barely save anything once fees and post‑promo rates are factored in.

Tips & cautions

If you can realistically pay off the balance before the promo ends, a 0% or low promo APR can produce large savings, even with a modest transfer fee—consider temporarily increasing your payment to hit that goal.
Compare multiple offers: sometimes a slightly higher fee with a much longer promo or better post‑promo rate can beat a shorter “no‑fee” offer, especially if you need more time.
Avoid new purchases on the transfer card; they may not share the promo rate and can be subject to different payment allocation rules that complicate payoff.
Make payments early in each cycle and avoid late payments—missing a payment can trigger penalty APRs or early promo termination, which the model does not assume.
Use the calculator again after you’ve paid down some of the balance to decide whether it’s worth moving the remainder to another promo offer or focusing solely on payoff.
Assumes fixed monthly payments and no new purchases or cash advances; real accounts may have variable payments tied to a percentage of the balance.
Does not model different minimum payment formulas between cards or complex payment allocation rules when multiple APRs exist on the same card.
If your planned payment doesn’t cover interest after the promo period, payoff is effectively infinite and the model will not show a finite payoff month count.
Does not include annual fees, late fees, penalty APRs, or other card‑specific charges beyond the transfer fee; these can reduce or eliminate savings.
Assumes your entire entered balance is eligible for the promo and that you are approved for the offer; real approvals and limits can differ.

Worked examples

$5,000 @ 24.99% vs 0% for 12 months → 22.99% after, 3% fee, $250/mo payment

Transfer fee = 5,000 × 0.03 = $150; transferred balance starts at $5,150.
Current card payoff ≈ 29.3 months with total interest ≈ $1,660 at 24.99% APR.
Transfer card payoff ≈ 23.8 months with promo 0% for 12 months and 22.99% thereafter; total interest ≈ $557 (including interest on the fee).
Months saved ≈ 5.5; interest saved ≈ $1,660 − $557 ≈ $1,103 even after factoring in the transfer fee.

$12,000 @ 21% vs 1.99% for 15 months → 24.99% after, 4% fee, $400/mo payment

Transfer fee = 12,000 × 0.04 = $480; transferred balance starts at $12,480.
Current card payoff ≈ 44.3 months with total interest ≈ $8,570.
Transfer card payoff ≈ 38.4 months with promo 1.99% APR for 15 months and 24.99% afterwards; total interest ≈ $5,739.
Interest saved ≈ $8,570 − $5,739 ≈ $2,831, with roughly 6 months shaved off the payoff timeline.

Deep dive

This balance transfer calculator tests whether a promo APR plus transfer fee beats your current credit card by modeling payoff time and total interest with your actual payment.

Use it to compare 0% intro offers, see if you’ll pay off before the promo ends, and estimate how much interest you could save after accounting for balance transfer fees.

Ideal for people carrying credit card balances who want to know if a balance transfer is a smart move or just shuffles debt around.

FAQs

Does this calculator include new purchases or cash advances?: No. It assumes you transfer a single existing balance and make no new purchases or cash advances on either card. New spending at different APRs can change how payments are applied and may reduce or eliminate the benefit of a transfer.
What if my payment is too low?: If your payment is so low that it doesn’t cover monthly interest after the promo period, the balance will not go down and payoff will never occur in the model. Increase your planned monthly payment until the calculator shows a finite payoff time for both scenarios.
Do all issuers apply payments the same way?: No. Many issuers apply payments to the highest APR balances first, but rules can vary and may change over time. This model assumes a single balance at a given APR in each scenario, which simplifies those allocation details.
Are annual fees and penalty APRs included?: No. Annual fees, late fees, and penalty APRs are not modeled. If your card charges these, they will increase your real‑world cost. Consider them when deciding whether to transfer a balance and how aggressively to pay it down.
Is a 0% balance transfer always the best option?: Not necessarily. The best offer depends on your balance, payment ability, transfer fee, promo length, and post‑promo APR. A lower fee with a slightly higher promo APR or a much longer promo can sometimes be better than a short 0% offer, especially if you need more time to pay.

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This balance transfer calculator provides simplified payoff and interest estimates using user‑supplied inputs and basic interest math. Actual card issuer terms, payment allocation rules, fees, and promotional conditions vary and may change. Always read the full balance transfer offer, verify details with your issuer, and consider seeking advice from a qualified financial professional before transferring or consolidating credit card debt.