Can't calculate cumulative sum

[PBI-Bro]

Hi,

I'm trying to do the simplest calculation here. A have a table with a Date Key column and a colum "IsPayday", which is of Type Whole number.

I want to have a running total of the second one and have tried many variations of the formula below, but haven't figured it out:

Thanks for your help!

[PBI-Bro]

Thank for your help.

I decided to change the source data and add ispayday as boolean in the data warehouse. With the field imported into Power BI I used the following variation of your code and got the calculation working:

Is Payday running total = 
VAR MaxDate =
    MAX ( 'Calendar'[Datekey] )
VAR Result =
    CALCULATE(COUNTROWS('Calendar'), 'Calendar'[Datekey] <= MaxDate && 'Calendar'[ispayday] = true )
RETURN
    Result

[johnt75 · Accepted solution]

try

Is Payday running total =
VAR MaxDate =
    MAX ( 'Calendar'[Datekey] )
VAR Result =
    CALCULATE ( SUM ( 'Calendar'[Is payday] ), 'Calendar'[Datekey] <= MaxDate )
RETURN
    Result

[PBI-Bro]

Thanks for your help @johnt75 

I tried it and have this error:

IsPayday is a custom column that I created in the Power Query Editor. Can that be the problem?

[johnt75]

You have an extra ] after IsPayday