system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5: If credit limit is $500, and I pay off my credit card so I have more than $500 available credit, can I make bigger purchase?
gpt
Sure! Your credit limit is just the amount that the bank will loan to you. You can put a positive balance on your account, and then make a payment above that limit, without any problems.

The only catch is that some banks will not allow you to carry a positive balance for a long time, and may make a transfer on your behalf, transferring that positive balance to a savings or transaction account.