One way or the other, updates are free. In 2004, UPSRateMonger will enter its fourth year of free distribution.
The tag will be updated with current rates on an as-needed basis (typically these are 1-year intervals).
Since rates are provided in comma-delimited form to the general public at ups.com, you can also import your own rates. It takes about an hour to figure out how to do it, and then get it done.
The process is actually pretty simple, and is made even more so with the tools provided beginning with Version 2.5, which automatically and directly import data from raw UPS® CSV zone files.
Beginning with v3.0, some example templates are included that show how much of the rates for v3.0 were imported, so if you want you can build your own ugrade engine without too much effort.