<prompt> Human: I have excellent credit and two credit cards that I pay off in full every month. I just got a third credit card with 0 APR for the first 12 months. So does that mean I can pay the minimum balance each month, put the remainder in a separate savings account each month to accrue interest, and pay the whole shebang at the end of 12 months without paying any interest and with no adverse effects on my credit score?  <response>: This is known as credit card arbitrage. It was far more useful when savings interest rates were at 5.If you tie it with a high interest checking account, its doable. The highest interest rates Ive seen are 4 at different credit unions, so its kind of a crapshoot if you qualify for a credit union that offers that rate. You also have to jump through some hoops to get the full interest rate usually 10-12 debit transactions per month, logging into the website, setting up a direct deposit or auto-bill pay.But unless youre ALSO getting some sort of reward cashback or travel miles with the credit card, I would say in general its not worth the hassle. 