Balance Transfer Calculator

Calculate savings from a 0% APR balance transfer with fee and post-promo rate analysis.

By Konstantin Iakovlev · Updated April 2026 · Source: CFPB — Consumer Tools

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Use the Balance Transfer Calculator above to calculate your results. Enter your values and see instant results — all calculations run in your browser.

Disclaimer: This calculator is for informational purposes only and does not constitute tax, financial, or legal advice. Results are estimates based on the information you provide and current rates. Always consult a qualified tax professional or financial advisor for advice specific to your situation.

How It Works

Moving a high-interest balance onto a 0% APR credit card can save real money, but only once you account for the transfer fee and the rate that kicks in after the promotion ends. With average credit card APRs projected to reach 22.5% by mid-2026, the gap between the introductory offer and the post-promo rate is exactly what determines whether a transfer pays off.

The tool weighs your current monthly interest against the cost of the transfer fee plus any interest that accrues once the promotional window closes. It first tallies the interest you avoid during the 0% APR period, then projects what you would owe on the remaining balance at the new APR after the promotion lapses.

The balance transfer fee, commonly 5% of the amount moved, can swallow much of the benefit if you leave it out of the math, so build it in from the start. Equally important is the promotional end date: any balance still outstanding when the intro period closes starts accruing interest at the higher post-promo APR, which can erase the savings you set out to capture.

Example: Consolidating $7,500 Debt in Early 2026

  1. 1 Input: Current Balance = $7,500, Current APR = 23.0%, Balance Transfer APR = 0% for 18 months, Balance Transfer Fee = 3.5%, Post-Promo APR = 18.99%.
  2. 2 Calculation: Current monthly interest = $7,500 * (0.23 / 12) = $143.75. Interest saved over 18 months = $143.75 * 18 = $2,587.50. Balance transfer fee = $7,500 * 0.035 = $262.50.
  3. 3 Intermediate Result: Net interest savings during 0% APR period (assuming full payoff) = $2,587.50 - $262.50 = $2,325.00. If the balance isn't paid, remaining balance will accrue interest at 18.99%.
  4. 4 Final Result: By strategically utilizing this 0% APR balance transfer, you could save up to $2,325.00 in interest over 18 months, significantly reducing your debt burden before the higher post-promotional rate of 18.99% applies.

Source: CFPB — Consumer Tools · Last updated: April 2026

Frequently Asked Questions

How does a balance transfer save money?
A 0% APR balance transfer stops interest from accruing during the promotional period (typically 12-21 months). This means 100% of your payments reduce the principal. On a $5,000 balance at 20% APR, transferring to 0% saves about $1,000 in interest over 12 months.
What is a balance transfer fee?
Most cards charge 3-5% of the transferred amount. A 3% fee on a $5,000 transfer is $150. Even with the fee, the savings from 0% interest usually far outweigh the cost if your current rate is 15%+ and you pay off the balance during the promo period.
What happens when the 0% balance transfer period ends?
The remaining balance begins accruing interest at the card's regular APR, typically 18-28%. Create a payoff plan to eliminate the balance before the promo period expires. Any remaining balance will be subject to the full ongoing rate, which may be higher than your original card.

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