Debt calculator
Balance Transfer Calculator
Compare the estimated cost of keeping a balance at the current APR with a balance-transfer scenario that includes a transfer fee, promotional APR, promo length, and post-promo APR.
Updated: June 10, 2026
Compare transfer cost
Scenario comparison
Transfer cost breakdown
This insight updates after calculation.
Transfer schedule preview
| Month | Payment | Principal | Interest | Balance |
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How the calculation works
The stay scenario applies the current APR until payoff. The transfer scenario adds the transfer fee to the starting balance, applies the promotional APR for the promo period, then applies the post-promo APR.
That means the transfer path can look cheap at first but weaken fast if the balance is not gone before the promotional window ends. Fee size, promo length, and payment discipline matter almost as much as the headline APR.
Formula
Monthly interest = balance × APR ÷ 12. Transfer cost = upfront transfer fee + estimated interest in the transfer scenario.
Worked example
If a $4,000 balance has a 22% current APR, a $250 monthly payment, a 3% transfer fee, and a 0% promotional APR for 12 months, the transfer starts with a $120 fee. The calculator compares that fee and any post-promo interest with the estimated interest from staying on the current card.
If the same balance is still large when the promo ends, the post-promo APR can erase much of the early benefit. That is why the promo payoff status should be read together with total transfer cost instead of by itself.
How to interpret the result
A positive savings estimate means the transfer scenario costs less under the inputs. A negative estimate means the fee and interest assumptions cost more than staying.
Even when savings are positive, the result is only strong if you can realistically make the payment that clears most or all of the balance during the low-rate window. Otherwise a transfer offer can turn into delayed rather than reduced cost.
What this estimate excludes
It excludes new purchases, late-payment penalty APRs, annual fees, deferred interest rules, minimum-payment changes, rewards, credit-score effects, and issuer-specific promotional conditions.
Offer-review checklist
Result quality checklist
- Confirm whether the transfer fee is 3%, 4%, 5%, or capped differently.
- Check if the promotional APR applies to transfers only or to purchases too.
- Verify how long the promo lasts and when the post-promo APR begins.
- Make sure the payment plan is realistic enough to reduce the balance before the promo expires.
- Review whether new purchases, missed payments, or late transfers can break the offer terms.
Related calculators and guides
Related calculators
Plan a card payoff with the credit card payoff calculator, estimate daily balance interest with the average daily balance calculator, check ratios with the credit utilization calculator, or prioritize multiple balances with the debt avalanche calculator.
For plain-English context, read Balance Transfer Explained, Credit Card Interest Explained, and Credit Utilization Explained.
Method and verification trail
- Method used: The stay path models payoff at the current APR, while the transfer path adds an upfront fee, applies the promo APR for the promo window, then applies the post-promo APR until payoff.
- Primary source type to verify: Card offer terms, Schumer box or pricing disclosures, issuer account agreement, statement balances, and any transfer-fee notice.
- What to verify in real documents: Transfer fee percentage, promo expiration date, purchase APR vs transfer APR treatment, post-promo APR, penalty APR triggers, and whether a transfer must post by a certain date.
- Scope limit: This page does not model rewards tradeoffs, score effects, issuer approval odds, or behavior changes like new spending during payoff.
For site-wide methodology, review How We Calculate. For sourcing and corrections standards, review Editorial Policy.
FAQ
Does this recommend a balance transfer?
No. It only compares simplified cost scenarios.
Why can savings be negative?
If the transfer fee and interest are higher than the stay scenario, the comparison shows a negative savings number.
Before relying on this estimate
The result is an educational estimate based only on the inputs shown on this page. It can help compare assumptions and understand the formula, but it is not a recommendation, approval decision, credit counseling, legal advice, tax advice, or a guarantee.
Compare important results with official statements, disclosures, local rules, fees, and qualified professionals where needed. See How We Calculate and the Disclaimer for more context.
Method and verification trail
- Method used: The calculator compares a stay-put payoff path with a transfer path that adds the transfer fee and then applies promotional and post-promo APRs month by month.
- Primary source type to verify: Card statements, balance-transfer offer terms, fee schedules, APR disclosures, and payoff statements.
- What to confirm in real documents: Transfer fee percentage, promo duration, post-promo APR, payment allocation rules, and whether new purchases or residual balances affect the offer.
- Scope limit: This page does not model issuer-specific grace periods, penalty APRs, deferred-interest quirks, or multi-balance allocation details.
For site-wide methodology, review How We Calculate. For sourcing and corrections standards, review Editorial Policy.