Several Venture Capital firms, such as S3 Ventures here in Austin, provide downloads to, in my opinion, rather complex financial modeling spreadsheets to help you get started.
I have my own version of this and it’s much simpler to work with (in my opinion).
These three should be modifiable for most business models.
Have a model that you’re not sure of? Leave a comment or shoot me a message, and I’ll be glad to help you think it through.
Want those complex models from S3? I’ve saved them here.