Since the 5% tax rate of IP-Box only applies to the portion of the work that's development- and research-related, the app should feature an additional input field/slider that would allow the user to indicate how big of a percentage of their income actually is subject to this lower taxation level. 5% IP-Box rate applied to 50% of income effectively amounts to overall taxation of 12%, and afaik currently there's no way in the app to reflect that.
Since the 5% tax rate of IP-Box only applies to the portion of the work that's development- and research-related, the app should feature an additional input field/slider that would allow the user to indicate how big of a percentage of their income actually is subject to this lower taxation level. 5% IP-Box rate applied to 50% of income effectively amounts to overall taxation of 12%, and afaik currently there's no way in the app to reflect that.