I already have an ANZ credit card, and signed up while the "spend $7,500" promotion was active, so I've been using the card a lot. This month, my balance is upwards of $5,000. I could pay this off with savings, but I also could get a Westpac credit card with this deal, transfer my balance to the new card, and have 0% p.a. on this balance for 14 months. That way, I could keep the balance on the card and just make minimum payments for 14 months, have an extra $5,000 in my savings account, and overall make an extra ~$200 in bank savings interest.
My question is, is this a good idea? Am I misunderstanding anything? Am I missing any catches, and will this have a negative impact on my credit score? Or will any consequences go away when I pay off the balance after 14 months?
Yes it's a good idea unless you plan to get a home/car loan in which it may affect the amount you can borrow.
That card has a $150 fee if you're not a Westpac customer. Overall you could still end up saving money.