re: What happens if you don't pay your taxes quarterly?

I've been self employed the past 2 years and have yet to make a quarterly payment. Maybe it's laziness, or maybe I like having that money now, but the late fee isn't much at the end of the year (I think mine was about $70).

I did recently speak with a CPA though and she was adamant about me paying quarterly. She said if they ever decide to come after me I'll be paying interest on everything, so that kind of scared me.

Another reason I pay at the end of the year is because I can pay with a credit card and get the reward points. I'm not sure if you can pay quarterly with credit.