[AccessD] OT Contract Rates

Good advice from Dan, to which I would add this: you need to figure out the
cost of your employment at the first firm, and this is important since your
salary was only the beginning of said cost. You also have to factor in the
cost of your cubicle or office, the cost of the physical equipment (not the
servers) you used, the cost of supporting services such as photocopying,
and perhaps even the cost of (assuming such perks) coffee and free drinks.
So, if the firm was paying you, say, $85,000 a year for 2000 hours, your
actual cost to the firm was in excess of $100k. That's what you should be
basing your hourly rate on, particularly because you'll be incurring these
extra costs in your home/office. Oh, and since the firm has been paying for
the SQL and other licenses, that's an additional cost you might have to
incur. Of course, all this has to be compared to what the others competing
for the gig might charge for their services. But there's one additional
factor to consider. Having worked on these systems for years, you have a
decided leg up on the competition, who may require weeks or months to learn
how they all fit together and work to deliver a solution.

And finally, as was mentioned, you need to consider the effects this
additional gig will have upon your family, your weekends off, etc.

Hope this helps.
Arthur