With the perfect UX to the test winner of the tax return.

Buhl - WISO steuer:Sparbuch & WISO steuer:Mac

For many people, the annual tax return is the stuff of nightmares; the WISO steuer: range of software provides support and helps with completing and submitting the tax return. Our team redesigned the applications’ interface, all the while respecting the platform-specific characteristics. The focus in this regard lay on improving the UI and the UX and creating a standardized look and feel.

"With Ergosign we easily manage the balancing act between sustainable development and strategic expansion."

Peter Schmitz

Peter Schmitz

Chief Executive Officer
Buhl Tax Service GmbH


When it comes to tax software, it’s important to create a standardized look and feel for different systems. What should be created is a modern and sustainable design that offers an excellently optimized user experience. Also, for the users, operation should be designed so that it is as intuitive and clear as possible.


Thanks to the long-lasting partnership between Buhl and Ergosign, the team acquired extensive knowledge about the software. The optimized navigation and tooltips displayed to the user make it easier for them to use the software.

Buhl tax software UI from Ergosign


With the development of the Dark UI, the look & feel of the software had not only to be "translated" into darkness, but also the technical requirements for the controls and the contrast ratio had to be taken into account. Keeping the user's focus on the important areas and creating a consistent appearance between Light and Dark UI was a challenging task.


Over 600 icon metaphors were adapted for the Dark UI. The icons must work as background on many different shades of gray. The color world of the Light UI icons must be preserved. With the help of the definition of key icons, the ideal color contrasts could be found.

Das neue Dark UI der Buhl Steuersoftware


The range of software won multiple awards during the year-long collaborative relationship between Ergosign and Buhl: in 2017, it was once again a Stiftung Warentest test winner (5/2017 Finance Test), as well as the winner of the CHIP "Tax Software” practical comparison test, a FOCUS MONEY test winner (rating: 1.3) in the "Tax Programs” category, and a Computer BILD test winner (3/2017 issue: GOOD), and also received recognition from WirtschaftsWoche, €uro and MacLife.


Buhl Data Service is counted among Germany’s leading software development firms and, as a service provider, sells a successful range of software relating to taxes, money and the office. The personal finance management products are primarily aimed at private users.

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