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Flex Accounts
Flex Accounts


The Flexible Spending Account Administration Solution

Install complete Fast-Flex Plus software

Step 1. Use your browser’s print button to print a copy of this page for future reference.

Step 2.
Click here to: Download Fast-Flex Plus now!  After the download completes (you might need to look for FFPRO3DL.exe in your Downloads folder or in the lower left corner of your browser) double-click on it.  If you receive a warning from Windows® that it has "Protected" your PC (it isn't familiar with Fast-Flex Plus) click "More Info" then "Run Anyway".

If you intend to install Fast-Flex Plus on a shared (network) file server, please refer carefully to this URL for additional instructions before proceeding:

Step 3.
After the download completes, we recommend that you click on the "No-Questions-Asked Installation" button for a typical (default) installation. (The installation defaults should always be used unless you are installing to a network.)

If you are told that some of your system files are out of date, this is normal and you will need to let Fast-Flex Plus restart your computer in order to continue with the installation. Start over with Step 2, above, after re-booting your system.

Step 4. Begin your tax savings! Fast-Flex Plus will automatically start and you will see the "Flexing Arm" splash screen. Please be patient while Fast-Flex Plus locates your wordprocessor that will be used to display its reports! (This one-time search may take a few minutes.)


If you experience any difficulties installing or running Fast-Flex Plus (for example, Error 75) please refer to this URL:

Step 5. The Fast-Flex Plus on-line, printable User's Manual will be found at C:\Program Files\FFPRO4\MANUAL.PDF or C:\Program Files (x86)\FFPRO4\MANUAL.PDF if you are using a version of Windows later than XP, and is in Adobe's Acrobat Reader format, so you will need to double-click it with Windows Explorer to load it into the Adobe Acrobat Reader. From there you can view and print it. If you do not already have Adobe Acrobat Reader on your computer, a free download is available at:


The Operator's Manual is set up to explain the Main Menu, but that also generally follows the sequence (left to right, top to bottom) that you should operate the software.

The suggested operating sequence is outlined on page 7 of the manual. Please review it now and again after you've read the entire manual. Here is a brief 10-step summary:

1) Start FAST-FLEX PLUS and select the sample Herculean Tire "sample" company (p.27 ).  You can click the big "HELP" button in the lower right corner of the form to guide you through selecting our sample Herculean Tire Company's data.

2) Add your own company (p. 36 )  

3) Select your company (p. 27 )

4) Set up your company's fiscal year dates, etc. (p. 29 )

5) Add your employees and their scheduled paycheck withholdings (p. 43 )  Note:  
You can import participant data from your existing Accounting or HR/Payroll system to save data-entry time.


6) Add unscheduled transactions such as reimbursement requests (p. 56 )

7) Add scheduled withholdings on pay day (p. 72 )

8) Print reports to verify data, etc. (p. 86 )

9) Print expense reimbursement checks (p. 98 )

10) Once you've accomplished the first-time cycle, above, you normally just enter reimbursement requests as they come in (p. 56 ), update paycheck withholdings (p. 72 ), and print reimbursement checks (p. 98 ) each pay day.

To enter your own company data, so that you can start administering your own company's cafeteria plan immediately, even in the middle of a fiscal year, please go to this link:

This gets you jump-started! While there will be a learning curve with this or any other new software, it's not a big one according to hundreds of our customers - most of whom wouldn't classify themselves as computer experts.

Important Note:

The software will operate without cost or obligation for 90 days before it will require an access code for continued usage.  To use beyond the 90-day trial, please enter the following access code when requested by the software. You can also enter it from Main Menu/File/Update Access Code:




Disclaimer:  Fast-Flex Plus is provided "as is" and without warranty of any kind.  Interval Software, LLC is no longer charging any fees for the use of Fast-Flex Plus.  Likewise, we are no-longer providing Fast-Flex Plus customer support or product updates, so please install and utilize the software with this in mind.  Nevertheless, the software continues to be used in many organizations and, barring major changes to the tax code impacting flexible benefit plans, should remain serviceable for many years to come.