Forum Moderators: mack
Should I charge the whole amount in Advance or a portion (25%/50%) of the whole amount in advance?
Your question is very similar (apart from the UK context) to one posed in this thread [webmasterworld.com].
Check out the link at the foot of the first post - well worth reading through. Then read the replies to the thread I just posted above. By that time you should have a much better insight into what you are asking here, and a few ideas about answers too.
Being the cheapest is not always the best way, if your work is of a high standard then your price should reflect this.
In terms of payment options, I always ensure I have my costs covered before I go any further. Sometimes asking for a token payment is advisable also. That way if their plans change or you lose the contract, you do not end up out of pocket.
It is also a good idea to try and negotiate some form or retainer, whereby they will pay you so much a month/incident for minor changes and/or updates to the site.
Mack.