Your situation
Stay vs transfer - balance over time
Your balance transfer game plan
Your balance transfer math
Moving $6,000 from a 24.99% APR card to a 0% card for 18 months costs a 3% transfer fee of $180 up front - your new starting balance is $6,180.
Staying put: debt-free in 2 yrs 3 mos (Oct 2028), paying $1,841 in interest.
Transferring: debt-free in 1 yr 9 mos (Apr 2028), paying $31 in interest plus the $180 fee.
Verdict: the transfer wins by $1,631 all-in (fee already counted).
The golden number
To clear the entire balance inside the 0% window, pay $343.33/month. Every month you finish early is a month the post-promo 25.0% APR never touches you.
Transfer execution checklist
• Confirm the fee (3% is common, some cards run 5%) and that YOUR transfer amount fits under the new card's limit.
• Keep paying the old card until the transfer posts - a missed payment during the handoff means late fees and a credit-score hit.
• Don't spend on the new card: purchases often accrue interest at the full rate while your payments go to the 0% balance first.
• Set a calendar reminder 2 months before the promo expires - that's your deadline to be at zero or to plan the next move.
How the balance transfer calculator works
A 0% APR balance transfer pauses interest for a promotional window - but the transfer fee (typically 3-5%) is charged up front and added to your new balance. The calculator capitalizes that fee, runs your payments through the promo months at 0%, then switches to the post-promo APR for whatever balance remains. It compares that full path against simply staying on your current card, so the verdict is all-in: fee included, nothing hidden.
The single most important number on this page is the payment that clears your balance inside the promo window. Finish inside it and the post-promo APR never touches you - the transfer becomes almost pure savings. Miss it and the leftover balance starts accruing at a rate that's often higher than the card you left. The calculator computes that clear-it payment for your exact numbers and warns you when your current payment would stall after the promo ends.
Timing the application matters almost as much as the math. Promo windows typically run 12-21 months and start counting from account opening, not from when you actually move the balance - a slow transfer can quietly eat weeks off your runway. Apply as soon as you've decided, initiate the transfer immediately after approval, and calendar the promo end date the same day so it never arrives as a surprise on a statement.
Frequently asked questions
- Is a balance transfer worth the 3% fee?
- Usually yes when your current APR is high and you can pay the balance down substantially inside the promo window. The fee is a one-time cost; the interest you're escaping compounds monthly. Run your numbers - the all-in verdict shows exactly when the fee outweighs the savings.
- What happens when the 0% promo period ends?
- Any remaining balance starts accruing at the card's standard APR, often 20-30%. That's why the target is always to reach zero inside the window - the calculator shows the exact monthly payment that does it.
- Can I keep spending on the new card?
- Avoid it. New purchases often accrue interest at the full rate immediately, and issuers typically apply your payments to the 0% balance first - meaning purchase interest stacks up untouched.
- Does a balance transfer hurt my credit score?
- Short-term there's a small hit from the new-account inquiry, but a new card adds available credit, which lowers utilization. Keep the old card open and most people see scores recover and improve within a few months.
- Can I transfer a balance between two cards from the same bank?
- Usually no - most issuers won't let you transfer a balance to another card they also issue. You generally need a new card from a different bank offering a 0% promo, which is also a useful forcing function to shop the best available rate.