Two APRs sit on most card offers, and people tend to read only the louder one. A 0% balance transfer rate gets the big type. The purchase rate sits in the fine print. But the two rates cover different money, and the real cost often lives in how they interact. Here is a way to read both without fooling yourself.
Know what each APR applies to
A card usually lists several APRs. Purchases, balance transfers and cash advances are typically priced separately, according to the Capital One explainer on card interest. So the first job is matching each rate to its transaction type. Comparing a promotional transfer rate to a purchase rate is like comparing a hotel rate to a rental car rate. Both are prices. They just are not for the same thing.
APR, or annual percentage rate, is the standard yardstick for comparing borrowing costs, and issuers must disclose it before you agree to use the card, as the CFPB key terms page explains. On a credit card, APR generally reflects only the interest on your balance. Interest is typically calculated daily and can compound. A modest-looking rate can grow over several billing cycles if a balance carries over.
Account for the balance transfer fee
A transfer fee is usually a percentage of the amount moved, often 3% to 5%, or a flat amount. The CFPB notes it is commonly whichever is larger. The fee sits on top of the balance you move, so add it to the cost before you compare anything.
The CFPB-related analysis summarized by Davis Wright Tremaine uses a simple case. Move $1,000 with a 3% fee and you owe $30 on day one. That $30 does not shrink if you pay off early. It is a fixed entry price for the promotion.
Check how long the promotional rate lasts
Promotional rates run for a limited time. After that, the transferred balance may move to the card's standard rate. So find the end date and the rate that follows. Suppose your payoff plan needs 18 months and the promotion lasts 12. The last six months of that plan sit under the standard rate, and that is the number to examine.
Most cards also carry variable APRs tied to an index such as the prime rate, so rates can move. Fixed rates exist but are less common, and an issuer changing one must generally notify you first. A variable rate can rise even while a promotion runs on other balances, so ask which type applies.
Watch for contingent costs on new purchases
This is the cost people miss. On most cards you avoid purchase interest by paying in full each month. But the CFPB has described offers where, if the promotional balance is not paid off, the issuer may revoke the grace period on new purchases. Interest then starts on those purchases from the first statement.
The example in the analysis is concrete. A 12-month 0% transfer of $1,000 with a $30 fee, plus $500 of new purchases at 19.99%. If the grace period is revoked, that $500 accrues interest from month one. Purchases you would normally clear each month start costing money.
The CFPB bulletin on promotional APR offers says failing to prominently disclose contingent costs can be deceptive. If an offer does not clearly explain the grace period, treat the gap as a question to settle before applying.
Ask the questions that reveal the true cost
Put a short list to the written terms or the issuer:
- Does carrying a promotional balance revoke the grace period on new purchases?
- Is the transfer fee a percentage or a flat amount?
- When does the promotion end, and what is the standard APR after?
- Is the APR variable, and what index does it follow?
Then ask what triggers a penalty APR. Federal law requires 45 days' notice before one applies, and penalty APRs generally do not apply during the grace period. If you are more than 60 days late, the issuer can raise the rate on all balances, transferred ones included. Also note that you generally cannot move a balance between two cards from the same issuer.
One caution on expectations. The CFPB has said that if debt problems have hurt your credit, you probably will not be offered the low rates. The advertised rate is a best case, not a promise. Read the offer you actually receive, and compare it line by line.
Please seek a professional. This article is general information, not financial, tax or insurance advice. Please seek a licensed financial, tax or insurance professional about your own situation.
