Based on your financial expertise, provide your response or viewpoint on the given financial question or topic. The response format is open.

Is it OK to use a credit card on zero-interest to pay some other credit cards with higher-interest?
The short answer is no, it's probably not ok. The longer answer is, it might be, if you are very disciplined.  You need to make sure that you have enough money to pay off the card after a year, and that you pay the card on time, every month, without exception.  There may also be balance transfer or other fees that only make it worth while if the interest rate or balance on the other loan is high. The problem is most of these offers will raise your rates to very high levels (think 20% or more) if you are even one day late with one payment.  Some of them also will back charge you interest starting from day one, although I have only seen this on store credit "one year, same as cash" type offers.   In the end you need to balance the possible payoff against how much it will cost you if you do it wrong.  Remember, the banks are not in the business of lending out free money.  They wouldn't do this unless enough people didn't pay it back in one year for them to make a profit.