Balance Transfer Calculator — 0% APR Payoff Savings

See if a balance transfer actually saves money after the fee. Compares total interest paid vs your current card, with a deferred-interest payoff warning.

July 6, 2026

Balance to Transfer ($)

Original Card's Regular APR (%)

Transfer Fee (%)

New Card's Promo APR (%)

Promo Period Length (months)

New Card's APR After Promo Ends (%)

Payoff Plan

I know my monthly paymentI want it paid off in a target number of months

Monthly Payment ($)

Net Savings From Transferring

+$3,199.96

Transferring saves you money vs. staying on the original card, for the same monthly payment.

Total Cost With Transfer

$596.73

$240 fee + $356.73 interest, paid off in 29 months

Interest Avoided (Staying Would Cost)

$3,796.69

At the same $300/month, the original card would take 40 months to pay off

Warning: Won't Pay Off Within the Promo Window

At this payment amount, the balance isn't paid off before the 18-month promo period ends, so interest resumes at the regular APR (24.99%) on whatever is left. Some issuers also apply deferred interest — charging interest retroactively back to the transfer date if the balance isn't paid in full by the deadline — so confirm your card's specific terms before relying on the promo window.

Method: this calculator amortizes your monthly payment month-by-month against the balance, applying the promo APR for the promo period and the post-promo APR afterward, then compares that total cost (transfer fee + interest paid) against paying the same monthly amount on the original card at its regular APR the whole time. Net savings = interest avoided on the original card − (transfer fee + interest actually paid on the new card). Real card terms — fee minimums, grace periods, and whether interest is deferred or forward-only — vary by issuer, so treat this as a planning estimate rather than an exact payoff quote.

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Reference Values

Last verified: Jul 6, 2026

Category	Range	What It Means	Status
Typical transfer fee	3%–5% of balance	Most balance transfer cards charge 3% or 5% of the amount moved, usually with a small flat minimum (often $5–$10). A handful of cards run 0% fee promotions, usually for a limited time.	Good
Dedicated balance-transfer cards' promo period ★	18–21 months	Cards built specifically around balance transfers tend to offer the longest 0% introductory windows.	★ Best
Rewards cards with a bolted-on BT promo	12–15 months	Cards primarily marketed for rewards or cash back often include a shorter promotional balance-transfer offer.	Good
Typical regular APR after promo ends	20%–29.99%	Once the introductory period ends, the remaining balance reverts to the card's standard variable APR — usually similar to typical US credit card APRs.	Okay
Flat-fee minimum (some cards)	$5–$10 minimum	Instead of (or alongside) a percentage fee, some cards charge whichever is greater: the percentage fee or a small flat-dollar minimum.	Okay

Source: Typical fee and promotional-period ranges aggregated from Bankrate and NerdWallet balance-transfer credit card guidance (2026); individual card terms vary by issuer and applicant creditworthiness — always confirm exact terms in the card's official terms and conditions before transferring.

Worked Examples

Paid Off Comfortably Within the Promo Window

Balance: $8,000
Original APR: 24.99%
Transfer Fee: 3%
Promo APR: 0% for 18 months
Monthly Payment: $500

+$1,592.37 net savings

Fee = $240, new balance = $8,240, paid off in 17 months at 0% (interest = $0). Total cost with transfer = $240. Staying on the original card at the same $500/month would take 20 months and cost $1,832.37 in interest. Net savings = $1,832.37 − $240 = $1,592.37.

Solving for the Payment Needed to Clear It in 12 Months

Balance: $5,000
Original APR: 22%
Transfer Fee: 5%
Promo APR: 0% for 12 months
Target Payoff: 12 months

$437.50/month required, +$412.31 net savings

Fee = $250, new balance = $5,250. At 0% APR, paying it off in exactly 12 months needs $5,250 ÷ 12 = $437.50/month. At that same payment, the original card (22% APR) takes 13 months and costs $662.31 in interest. Net savings = $662.31 − $250 = $412.31.

Payment Too Low — Misses the Promo Window

Balance: $10,000
Original APR: 26.99%
Transfer Fee: 4%
Promo APR: 0% for 15 months
APR After Promo: 24.99%
Monthly Payment: $500

Not paid off in time — $223.68 in post-promo interest, still +$2,809.25 net savings

Fee = $400, new balance = $10,400. At $500/month, only $7,500 is paid down by month 15, leaving about $2,900 owing when the promo APR expires — interest then resumes at 24.99%, adding $223.68 before full payoff in month 22. Total cost with transfer = $400 + $223.68 = $623.68. The original card at 26.99% would have cost $3,432.93 in interest over the same payment schedule (27 months), so the transfer still nets +$2,809.25 — but only because 26.99% was so much higher to begin with. This is the deferred-interest risk scenario the calculator warns about.

Low-Rate (Not 0%) Introductory Offer

Balance: $6,000
Original APR: 21.99%
Transfer Fee: 3%
Promo APR: 4.99% for 18 months
Monthly Payment: $350

+$834.54 net savings

Fee = $180, new balance = $6,180. At 4.99% promo APR, $350/month pays it off in 19 months (1 month past the 18-month promo window) with $254.01 total interest. Total cost with transfer = $180 + $254.01 = $434.01. The original card at 21.99% would take 21 months and cost $1,268.55 in interest. Net savings = $1,268.55 − $434.01 = $834.54.

Small Balance, Aggressive Payoff

Balance: $3,000
Original APR: 19.99%
Transfer Fee: 3%
Promo APR: 0% for 15 months
Monthly Payment: $300

+$218.96 net savings

Fee = $90, new balance = $3,090, paid off in 11 months at 0% (interest = $0). Total cost with transfer = $90. The original card at 19.99% would take 12 months and cost $308.96 in interest. Net savings = $308.96 − $90 = $218.96.

How to Use This Calculator

1

Enter the balance and your current card's APR

The amount you're considering moving, and the regular APR you're currently paying on it.
2

Enter the new card's transfer fee and promo terms

The fee percentage, the promotional APR (0% for most balance-transfer offers), how many months the promo lasts, and the APR that applies after it ends.
3

Choose your payoff plan

Either enter the monthly payment you plan to make, or tell the calculator how many months you want it paid off in and it solves for the required payment.
4

Read your net savings

Compares total cost with the transfer (fee + any interest) against the interest you'd pay staying put at the same monthly payment — plus a warning if your plan won't finish before the promo expires.

What Each Value Means

Transfer Fee ($): A one-time upfront cost charged by the receiving card, typically 3%–5% of the balance moved, almost always added directly onto the new card's starting balance rather than billed separately.
Promo APR (percent (%)): A temporary, usually much lower (often 0%) interest rate the new card charges on the transferred balance for a limited introductory period before reverting to the regular APR.
Net Savings ($): Interest avoided by moving the balance (what you'd have paid staying on the original card at the same monthly payment) minus the total cost of transferring (the fee plus any interest actually paid on the new card).

Frequently Asked Questions

How much does a balance transfer fee usually cost?

Most balance transfer cards charge 3% or 5% of the amount you move, often with a small flat minimum of $5–$10 if the percentage would work out to less. A $8,000 transfer at 3% costs $240 upfront, typically added directly to your new card's balance rather than billed separately. A handful of cards run limited-time 0%-fee promotions, so it's worth checking current offers before assuming the fee is unavoidable.

What happens if I don't pay off the balance before the promo period ends?

Once the introductory window closes, any remaining balance starts accruing interest at the card's regular APR going forward — which can be 20%–30% depending on the card. On some cards, this is straightforward: interest resumes only on the balance left at that point. On others, especially retail and store-branded promotional financing, the issuer can apply deferred interest — charging interest retroactively back to the transfer date on the entire original amount if it isn't paid in full by the deadline. This calculator warns you when your payment plan won't clear the balance in time, but always confirm your specific card's rule before relying on the promo window.

Is a balance transfer worth it if my payment plan won't finish within the promo period?

Often yes, but it depends on how much lower the new card's rate is compared to your current one, even after the promo ends. If the new card's regular APR is meaningfully lower than what you're paying now, you can still come out ahead even after some interest resumes — the calculator's net savings figure accounts for this by simulating interest at the post-promo APR for however long it takes to finish paying off the balance. If your current APR and the new card's regular APR are close, missing the promo window erodes most of the benefit.

Does the transfer fee get charged upfront or added to the balance?

Almost always added to the balance. If you transfer $8,000 at a 3% fee, your new card typically starts with an $8,240 balance rather than billing you $240 separately — meaning the fee itself accrues at the promo APR just like the rest of the balance. This calculator follows that convention, adding the fee to the starting balance before running the payoff simulation.

How is 'interest avoided' calculated on this page?

It's the total interest you'd pay on your current card, at its regular APR, making the exact same monthly payment amount over however many months it takes to pay off there. Comparing at the same payment (rather than the same number of months) makes it an apples-to-apples comparison of real dollars — since a lower APR usually also means the balance clears faster, not just cheaper.