LLC to c-corp?
hga: How much depends on where you are and if the incorporation is out of state, i.e. in Delaware.However, why would you need a c-corp to accept investment?  An LLC provides a lot more flexibility and you'd just have to redo you Operating Agreement.That flexibility comes at a price, an investor can and likely will insist on modifications that provide him greater protections/rights/whatever that he would have been able to get with an investment in a c-corp.  I've worked for one promising company who's life was cut short when its devil investors abused various provisions they had put in the Operating Agreement to gain complete control (all of nothing, we all resigned, but they didn't seem to mind).