I have never paid a dime of interest since having my card from when I turned 18 (sept. 2013). I get the Tim Hortons 1% cash back, and it funds my iced coffee addiction throughout this warm summer.

I sometimes make purchases over the $500 limit by "overpaying" it, and usually I pay off the credit card immediately after the purchase; i.e., I only buy what I can afford. It isn't that hard.

The reason I'm inclined to accept this increase of $1000 is so that I can make purchases in between paycheques (most of my $ goes straight to investments), and so that I have greater flexibility, and I can less frequently "overpay" my card.

Will accepting this credit increase affect my credit score?

Thanks PFC!

tl;dr: CIBC gives offer to raise CC limit by $1k. Accept?

Update: Thanks everyone for your suggestions. I ended up accepting it, and as few of the commenters mentioned, it lowers my utilization rate, which I totally forgot about. Thank you!!!