Oh, fun. How much to charge…
While I (and many others on this side of the consulting divide) like
the idea of commission based on site success, the reality is that
very few clients will buy in to that. They fully expect it to work,
and make them loads of money, so see no reason to split the profits.
You will do much better with a fixed price, and the possibility (no
lock-in) of maintenance.
However, there is one critical thing to do when pitching fixed
price: define very specifically what they will be getting. This
isn't "translation of 300 posts," it is "translation of 300 posts,
with one round of amends, feedback on the originally submitted
translations being provided no later than one week after said
translations are delivered (rolling process)." The key here is that
you don't open yourself up to re-re-reworking things ad infinitum,
and also that you do not leave yourself hanging, waiting for them to
finish their part of the process, without income and unable to move
on to your next project. (I was once on a project where someone
stated "we will provide enough content"… and for months, there was a
consistent refrain coming from the client "that's not enough".) Of
course, when they miss deadlines, or want more revisions, those are
available as change requests, with appropriate additional pricing.
(It may be worth building a certain amount of change request padding
into the initial quote.)
Alternatively, you can tell them a daily rate, and give an estimate,
and work to that. Again, let them know the time they have to turn
things around, and how downtime based on their failures will be
billed (because it should be; I'll let you come up with less blunt
wording).
One thing to consider, of course, is the overall viability of the
project. What is their budget? And can you reasonably envisage
delivering within those constraints. Don't be put off if your figure
is higher than theirs. But if your first draft of costs will come in
at 10 times what they think they can get away with paying, you might
want to bat that scope back to them before wasting time with the
full quote.
Rick