Low rate credit cards sound great but they could have a sting in the tail.

How long do these low rate credit cards last before the apr rises and when it does rise how high will these low rate credit cards go? 

Most low rate credit cards will last a minimum of 6 months and no longer than 12 they are normally restricted to what these low rates will apply to eg; outstanding balance transfers or all purchases made within the first 6 months of you opening an account. 

Low rate credit cards are normally issued to people with sound finances, in steady employment and with good credit ratings. 

You may well find that low rate credit cards do not come with a range of benefits like, Free Air Miles, or Loyalty points on everything you use your low rate credit cards to purchase. 

This is because for the credit lender to be able to offer you these low rate credit cards they are unable to charge you later on for any free gifts or benefits they initially offered you. 

Low rate credit cards are still subject to the base rate set by the Bank of England, if this base rate goes up so will your credit card, so after the initial low rate period of time, your low rate credit cards will rise to a level normally just below that of standard apr credit cards, so you should still benefit from a low rate of interest but it will not be as low as you started with.