This was discussed the other day - http://community.spiceworks.com/topic/812242-do-i-need-to-register-a-business-to-provide-it-services-as-part-time?page=1#entry-4345788
Your own circumstances are likely different - But here is my take on it from a risk perspective (Taken from above thread):
The law where I am in Ontario Canada & in the UK is as follows: when you incorporate you still have risk yes - but your exposure to risk is very much limited.
Why?
A corporation is a totally separate legal entity and as such, a person can not be incorporated - this is how it helps protect one’s assets as the people who are looking for compensation sue the corporation - not the individual.
A corporation requires 1 registered director who has limited liability and one other person for taking the minutes who has NO liability (Typically a lawyer for small corps) - each director listed on the articles of incorporation assume a small chunk of liability, but this is limited by law (depending one where you live, amounts may vary).
Let’s say Joe Blogs is a registered director of XCorp and they are being sued by ACME Inc. Joe Blogs as a registered director may have liability / blame assigned to him depending on the circumstances.
If ACME Sues XCorp for $5m, but Joe Blogs is only liable for $10k, all Joe Blogs has to pay is $10k. Joe get’s to keep everything apart from the $10k he is legally liable for.
Even if XCorp only has $3m in assets and cash leaving a $2m hole - Joe Blogs is still only liable for $10k. The firm would file for bankruptcy - but the key is the directors keep what they own.
With a SP - ACME Inc would be suing Joe Blogs as he works for his self.
Even with Insurance, if you have a policy that covers you for $1m for something like negligence - but your customer ACME Inc is suing you for $1.5m - you as the SP will have to cough up $500k - if you can’t the court can / will take all your assets to cover the missing amount and if you still owe money you will have to file for bankruptcy or the order will be placed on you by the court.
I do not know the in’s and out’s of the laws in your area - but in general - where I live and where I am from, that is how it works.
But again - seek legal council to make sure you are making the best and most informed decision for your locality.
Doing business is dirty - having a great team behind you is essential!!
Cover all bases!! 