10 You need to talk to a good CPA, immediately. 20 You need to talk to a good CPA with experience in startups, immediately. 30 You need to talk to a good CPA an

10 You need to talk to a good CPA, immediately. 20 You need to talk to a good CPA with experience in startups, immediately. 30 You need to talk to a good CPA and tax attny w/experience in small biz, immediately. Here's the rough picture from my experience as part or full owner of several corps in my career, "S", "C", and/or LLCs (I'm not a lawyer or tax attny, so this is just experience to give a rough idea, not advice): My experience has been that the profits from LLCs and "S"-Corporations go to your personal bottom line. If you are the sole owner, there's essentially no difference for tax purposes between you being a sole proprietor. So, it doesn't matter where you keep the money (biz acct or yours) or for purposes of the amount of tax you'll owe that year. To retain earnings in the corp, you'll likely need a "C" corp, and then pay taxes at the corp level. This is often sub-optimal, as you'll pay taxes on a corporate level, and then to yourself as dividends when you later take money out of the corp. You definitely need to GoTo Line 10,20 and 30. Things will definitely differ depending on what stare you are in, and with your particular situation. There may be many optimizations that are available to you. In your situation, it would be good to talk to several and interview them. Also, if you continue to do that well, start talking to good trust & estate attnys, especially if you have a family. When I say good, I mean good - seek out the top in the industry. The top ones are fundamentally better than the typical local T&E shops (these will give you a far better plan than nothing, but...). Congratulations on your good skill and fortune, and I hope you do well!