How long should I keep my credit card?

D00DY_T00Dy

Just applied and been approved for a capital one credit card at 30 something% Apr with a £400 limit and chose to pay off in full via direct debit.

I plan to use this card purely to buy something that I have the funds for then pay it off in full to build credit and just in case for emergencies.

How long should I keep this card for? 6month? A year?
Just to give you a rough idea my clearscore rating is 340/700(on par with my area)

[Deleted User]

If you don't plan on getting another to replace it, then forever.

But practically speaking, once you have two or three other better cards, you could drop it.

D00DY_T00Dy

I plan on replacing it for one with a better interest rate just a question of when... Suppose I'll try the eligibility checker on her in 6months time to see what I can get to replace or have as well as this