I've noticed recently that alot of free site hosts have you start paying after a year unless it says you dont in their Terms and conditions. I wanted to ask (as this seems a great site) do you have to here, as I can find yours on your site?

There's nothing in the TOS that it says that you'll have to pay after a year. Just enjoy the free service while it last and stop worrying.

I've been using Zymic for a year now and haven't been asked to pay a cent.