Muller Publishing was established in 1991 when The Complete Small Business Cash Book was designed and published. Cash Books at the time were not designed to be user friendly nor did they help the business owners tax agent when filling out their tax returns. The book was designed by a Tax Agent to be friendly to both the business owner and tax agent.

When GST was introduced in 2000 the cash book was updated to make completing each BAS as easy as possible.

In 1996 Muller Publishing recognised a need for a simple but professional Will Kit. My Will was developed by a commercial lawyer and published shortly after.