Recently, I did a couple of hours of work for a client, WITH A WRITTEN AGREEMENT, and didn't get paid. It isn't worth the hassle to sue and collect for a couple hours of work. So, I wrote the experience off as a loss and moved on. My rules now: 1. If you want me to write a specification or project plan for you, I expect to get paid for it. If you want me to formally review your wireframes, I expect to get paid. 2. I'…
But I don't do unpaid work for them. If they don't yet have a spec and are still exploring options, I let them know that one service I provide is consulting on a strategy and helping write a spec, creating wireframes, etc. They can hire me hourly to do that, and then decide later if they want to hire me to build it out.
Now, when you start bidding on much larger projects, you may spend more time reviewing specs. And you'll have to decide whether you want to get involved in the RFP process that some clients require. I typically opt out of those because they do require lots of unpaid work upfront. (I saw one RFP recently that wanted design mockups; no thanks.) And sometimes it seems as if clients have already chosen their vendor but need to do the RFP paperwork to make their decision seem legit.