$8,000 transfer with a 4% fee
Fee added: $320
0% period: 15 months
Payment to clear before expiry: about $555/month
At 24% on the old card, the fee may break even in roughly two months
A remaining balance after month 15 needs a second-rate scenario
Read the sequence from the starting balance through the trigger or exit date.
Follow the decision over time
Fee treatment
Confirm whether the fee is added to the promotional balance, billed separately, or excluded from the promotion. This changes the opening balance and required payoff payment.
Promotion boundary
Record the statement cycle or date when the rate ends and the APR that follows. Do not round a 15-month period into a vague year and a half.
This decision belongs in The Real Cost of Credit Cards. Use Deferred Interest vs. True 0% APR: The Deadline Changes Everything to check the next assumption, then test the numbers in the Balance Transfer Calculator.
Payment allocation
New purchases may have a different rate and can complicate allocation. Avoid mixing spending with a transfer payoff unless the agreement is clear.
Approval uncertainty
The granted credit limit may be lower than requested, leaving debt on the old card. Model partial transfer costs instead of assuming the full amount moves.
Build the decision timeline
The transfer fee is paid immediately while interest savings arrive over time. The useful comparison uses the same monthly payment on both paths and prices any balance left after the promotion.
Promotion details to verify
- Transfer fee, promotional APR and exact end date.
- APR applied to the remaining balance after expiry.
- Credit limit and payment-allocation rules for mixed balances.
- Calculate the fee and opening transferred balance.
- Determine the payment needed to clear it one cycle early.
- Estimate interest avoided on the old card over the same months.
- Model any balance left at the post-promotion APR.
- Do not close or spend on accounts solely because the model assumes it.
Timing risks that change the cost
- Calling a 0% transfer free.
- Ignoring the limit actually approved.
- Making purchases that do not share the promotion.
- Planning another transfer without including another fee and approval risk.
Test the dates and balances
Balance Transfer Calculator
Test whether the transfer fee buys enough interest savings before the promotion ends.
Questions this decision usually raises
Does the fee earn interest?
It depends on the agreement and how the fee is posted.
Should I include annual fees?
Yes, if the card must remain open or the fee is incurred to obtain the promotion.
What is a good break-even?
There is no universal threshold; compare fee with interest avoided and require a payment you can sustain.
Verify the dates, triggers and limits
This page explains a calculation, not a personal recommendation. Contract rules and consumer protections vary by product and jurisdiction. Check the current agreement and official guidance before acting.