There are also two more detailed files available for each two year election cycle. These contain information about specific PACs or party committees' contributions and expenditures related to federal campaigns. For example;
These files are updated on the 2nd of each month, and include any information entered into the FEC database up to that point. You should keep in mind that it takes 30-40 days after reports are received for all the information to be computerized.
The individual contributions file (itcont.zip) is so big now that we've tried to set up a process for updating the file, rather than downloading a new version each month. The following three files represent additions, changes, and deletions from the itcont file that have taken place during the last calendar month. If you downloaded the full file last month (or have been keeping up with updates), this month you can download the add file (incadd.zip), the change file (incchg.zip) and the deletes file (incdel.zip), and make the adjustments to last months data. You will want to add the records in the incadd.zip file, replace records that are included in incchg.zip, and delete from your full file any records in incdel.zip. The key to all this is the FEC record number, which uniquely identifies each record in the file. You'll need to do the updates faithfully each month in order to avoid needing the full file again.
Be sure to download the Format Description so you can interpret the file.
Be sure to also download the Format Description which is also the same as pacsum94.
Since this file summarized detailed information about contributions to candidates, the time period covered by the file will only change when we have completed processing information for a complete reporting period. The next complete reporting period is the post-general report covering from October 17 through November 25. These reports should be completed sometime in January.