How to add fiscal Month, Quarter or Year Column in Power Query

Over the last few months, I’ve been asked several times how to add a fiscal month, fiscal quarter, or fiscal year column in Power Query. So, I decided to note down the method; therefore, I don’t have to keep reminding myself how I did it last time. The good news is that it’s reasonably straightforward. Let’s see what we need to do.

Table of Contents

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File name: 0154 Fiscal Month, Year, Quarter in Power Query.xlsx

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Data

For this example, I’m starting with a simple data set.

Dates for Example

All of these dates are in the dd/mm/yyyy format. Depending on your regional setting, they may be in another date format.

Throughout this post, I’m assuming:

  • We are using a standard calendar for month ends. I’ll cover non-standard calendars in a future post.
  • The year-end is March (i.e., Period 3)

Add a fiscal month column

There are several ways to calculate the fiscal month; I’m going to demonstrate the easiest to understand.

In Power Query, click Add Column > Custom Column.

Add Custom Column in Power Query

In the Custom Column dialog box, enter the following formula:

=if Date.Month([Date]) <= 3 then Date.Month([Date]) + 9 else Date.Month([Date]) - 3
Custom Column with Fiscal Month
  • Date.Month([Date]) – Returns the calendar month number from the date
  • 3 – the year-end month
  • 9 – 12 months in a year, minus the year-end month

The additional column looks like this:

Fiscal Month in Power Query

If you already have a calendar month column in your source data, you can replace Date.Month([Date]) with that column name.

Bonus tip: If you want to declare the data type in the same step, add Int64.Type as the data type into the formula bar (see underlined below)

= Table.AddColumn(#"Changed Type", "Fiscal Month", each if Date.Month([Date]) <= 3 then Date.Month([Date]) + 9 else Date.Month([Date]) - 3, Int64.Type)

Add a fiscal year column

To add a fiscal year column, the process is the same, but a slightly different formula.

In the Custom Column dialog box, enter the following formula:

=if Date.Month([Date]) <= 3 then Date.Year([Date]) else 
Date.Year([Date]) + 1
Custom Column with Fiscal Year

Again, if you already have a calendar month column in your data, use that instead of Date.Month([Date]).

The additional column looks like this:

Fiscal Year in Power Query

Add a fiscal quarter column

The fiscal quarter may seem a little trickier initially, but this method is super easy.

In the Custom Column dialog box, enter the following formula:

=Number.RoundUp([#"Fiscal Month"]/3)
Custom Column with Fiscal Quarter
  • #”Fiscal Month” – the name of your fiscal month column calculated earlier.

The additional column looks like this:

Fiscal Quarter in Power Query

If we don’t have a Fiscal Month column in our data, we can incorporate everything into a single transformation.

=Number.RoundUp(
(if Date.Month([Date]) <= 3 then Date.Month([Date]) + 9 else Date.Month([Date]) - 3)
/3)

Want to add half years (e.g., H1, H2) instead of quarters? No problem. Change /3 to /6.

Conclusion

We’ve seen that adding fiscal month, fiscal quarter, and fiscal year columns in Power Query is reasonably straightforward. It just takes a little bit of logic inside a custom column.

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