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Power Pivot Principles: Creating a Disconnected Table for GST

23 February 2021

Welcome back to the Power Pivot Principles blog.  This week, we’ll continue last week’s example, and build on the mistake of not including a Goods & Services Tax (GST) on the Sales transactions.  For this week, we will create a disconnected table for GST.


Let me remind you that we amended the Sales measure last week by changing the measure as shown below.

=CALCULATE(-SUM(Budget[Amount])/1.1, COA[Group] = "P")

When I look at my measure, it makes me realise how confident I am about the indirect Goods & Services Tax (GST) rate always staying at 10%.  However, that is not how tax and fiscal budgets work.  To be able to accommodate for the volatility in GST, I will create a disconnected table by constructing a table for a range of GST percentages and add this to the Data Model.

To make it more presentable, I will add a new column by using the FORMAT function and rename it to GST Percentage by using the formula


The GST table will now look like this:

That’s it for this week!

Come back next week to see how we use the disconnected table for performing a sensitivity analysis by staying tuned for our next post on Power Pivot in the Blog section.  In the meantime, please remember we have training in Power Pivot which you can find out more about here.  If you wish to catch up on past articles in the meantime, you can find all of our Past Power Pivot blogs here.