I try to get 50% of the budget (non-travel) up front. When we're done with the production portion and I have all my travel receipts in, I then bill the travel portion and ask for "fast track" or asap payment. This way I am not waiting for the completion of the video and waiting for the 2nd half + travel. As everyone in the biz knows, the definition of "complete" is vague and can take weeks, but I need the travel money paid quickly because it's on my credit card. An alternative option is if you can travel with the client, everything related to travel is put on their credit card, but this assumes they are always with you.
I am more forgiving of Fortune 100s and steady clients than I am of new clients.However, some mega size clients have to abide by their internal accounting rules and I have to tack on the travel to the 2nd payment. I always include the travel receipts though.
But getting back to the point I was making in the post: No matter how carefully I estimate, the four categories of travel are so variable. In the good old days I would slip a skycap $20-$50 tip and take on everything, now I may be charged hundreds for overweight and excess bags. Besides, it varies from airline to airline. So if at all possible I get permission to do all the non-travel part of the estimate (but include your travel only days), and the four categories of travel (Airfare, Meals, Lodging, Car Rental) will be billed "In Addition at Cost". I usually include a line that I will travel reasonably, meaning a Marriott Courtyard versus the downtown Hyatt, etc.
It also depends if you are doing an estimate as a videographer or a full service production company. It is expected that a cameraman is reimbursed for travel very quickly by the producer who has supposedly his 50% up front to pay the shooter.
There have been a few times when they needed an exact travel estimate because they wanted to compare using me against a local video production company, so they needed the travel costs to compare apples to apples.
Ned
P.S. When estimating always take out all the rental car insurance you can. If you get in a bad accident your carrier might not cover you unless you had a business policy, and you can't look to the client's company because their legal department may cut you loose as a "contractor". Verbal agreements mean nothing, so take the insurance. When asking for hotel rates get the bottom line. Here in Chicago a $200 room really means a $270 room when all the taxes and fees (tourist gouging) are added on.
Ned Miller
Chicago Videographer
http://www.nedmiller.com
http://www.bizvideo.com