Power BI Current & Next Month DAX Calculator

A smart tool to generate dynamic DAX formulas for time intelligence calculations based on a simulated TODAY() function.

DAX Time Intelligence Calculator

Calculation Timeline Visualization

The chart above visualizes the relative position and duration of the calculated current and next month periods based on your selected reference date.

What are current month and next month calculations using TODAY() in Power BI?

In Power BI, current month and next month calculations using TODAY() refer to a set of DAX (Data Analysis Expressions) time intelligence patterns that dynamically calculate date ranges based on the current date. These calculations are fundamental for creating reports that automatically stay up-to-date, showing metrics like sales, tasks, or events for the current calendar month and forecasting or preparing for the next one without manual intervention.

By using the `TODAY()` function as a moving reference point, measures and filters can be constructed to always point to the relevant time periods. This is crucial for business dashboards, financial reports, and operational monitoring where viewing performance in the context of the present is paramount. This calculator helps you generate the precise DAX needed for these common and powerful scenarios.

The DAX Formulas and Explanation

The core of these calculations revolves around a few key DAX functions that manipulate dates. The goal is to find the first and last day of both the current and the next month relative to a given date (which we simulate with `TODAY()`).

Key DAX Variable Table

This table explains the DAX variables used to define the date boundaries.

Variable	Meaning	DAX Implementation Example	Unit
RefDate	The reference date, typically `TODAY()`.	`VAR RefDate = TODAY()`	Date
CurrentMonthStart	The very first day of the current month.	`STARTOFMONTH( ‘Date'[Date] )`	Date
CurrentMonthEnd	The last day of the current month.	`ENDOFMONTH( ‘Date'[Date] )`	Date
NextMonthStart	The first day of the upcoming month.	`EOMONTH( RefDate, 0 ) + 1`	Date
NextMonthEnd	The last day of the upcoming month.	`EOMONTH( RefDate, 1 )`	Date

Practical Examples

Example 1: Calculating Current Month’s Sales

A common business requirement is to display total sales for the current month. Using a DAX measure, you can create a dynamic calculation that will always reflect sales for the current month, no matter when the report is viewed.

• Input: A Sales table with an `[Amount]` column and an `[OrderDate]` column.
• DAX Measure:

  Current Month Sales = 
  CALCULATE(
      SUM(Sales[Amount]),
      DATESBETWEEN(
          'Date'[Date],
          STARTOFMONTH(TODAY()),
          ENDOFMONTH(TODAY())
      )
  )

• Result: A single value representing the sum of sales from the first to the last day of the current calendar month.

Example 2: Filtering a Report for Next Month’s Deliveries

Imagine you need to create a report that shows all products scheduled for delivery next month. You can apply a filter to your report page or visual to achieve this dynamically.

• Input: A `Deliveries` table with a `[ScheduledDate]` column.
• DAX Filter Logic (as a Calculated Column or Measure Flag):

  IsNextMonthDelivery = 
  VAR NextMonthStart = EOMONTH(TODAY(), 0) + 1
  VAR NextMonthEnd = EOMONTH(TODAY(), 1)
  RETURN
      IF(
          MAX(Deliveries[ScheduledDate]) >= NextMonthStart && MAX(Deliveries[ScheduledDate]) <= NextMonthEnd,
          1, 0
      )

• Result: A flag (1 or 0) that you can use in the report's filter pane to show only deliveries where `IsNextMonthDelivery` is 1. For more information see our guide on Power BI Filter Examples.

How to Use This Calculator

This calculator simplifies the process of generating DAX for your specific reporting needs. Follow these steps:

1. Select a Reference Date: Use the date picker to choose a date. This date simulates what `TODAY()` would return in your Power BI report. If you leave it blank, the tool will use the actual current date.
2. Calculate Formulas: Click the "Calculate DAX Formulas" button.
3. Review the Results: The tool will instantly display the key boundary dates (start/end of current/next month) based on your selection.
4. Copy the DAX: Below the dates, you'll find ready-to-use DAX measures. Use the "Copy DAX Results" button to copy all the generated code snippets to your clipboard for easy pasting into Power BI Desktop. For an introduction to measures, check out DAX Measure Tutorial.

Key Factors That Affect These Calculations

• A Proper Date Table: Time intelligence functions in DAX rely on a well-formed, contiguous date table. Ensure your model has a table marked as a date table with no missing dates. See our article on how to create a Power BI date table.
• `TODAY()` vs. `NOW()`: `TODAY()` returns the date at midnight, while `NOW()` includes the current time. For month-level calculations, `TODAY()` is almost always the correct choice to avoid issues with time parts.
• Time Zones: The `TODAY()` function in Power BI Service operates in UTC. If your users are in different time zones, the "current day" might change at a different hour than expected. This can affect which month is considered "current."
• Context in DAX: The results of these DAX measures depend heavily on the filter context in your report. For example, if you place the measure in a table with product categories, it will calculate the current month's sales for each category. We have an advanced guide on DAX evaluation context.
• Fiscal Calendars: The standard functions like `STARTOFMONTH` work on a calendar basis. If your organization uses a fiscal calendar (e.g., the month starts on the 5th), you will need more complex DAX logic.
• Leap Years: Functions like `EOMONTH` correctly handle leap years, so you don't need to worry about February having 29 days in the appropriate years.

Frequently Asked Questions (FAQ)

1. Why are my results from TODAY() different in Power BI Service vs. Desktop?

Power BI Desktop uses your local machine's time zone for `TODAY()`. The Power BI Service uses UTC. This can cause the function to return a different date for several hours each day, potentially changing the "current month" near the end of the month.

2. What is the difference between STARTOFMONTH and calculating it manually?

Using `STARTOFMONTH('Date'[Date])` is the standard, most readable way. A manual calculation like `DATE(YEAR(TODAY()), MONTH(TODAY()), 1)` achieves the same result but is less idiomatic for time intelligence.

3. How do I get the last month's start and end dates?

You can use `EOMONTH(TODAY(), -2) + 1` for the start of the previous month and `EOMONTH(TODAY(), -1)` for the end of the previous month.

4. Can I use these calculations as a calculated column?

You can, but it's often better to use measures. A calculated column with `TODAY()` is only evaluated when the data is refreshed. A measure is evaluated in real-time when a user interacts with the report, ensuring the "current month" is always accurate. Our guide on measures vs. columns explains more.

5. Why is `EOMONTH` a good function for these calculations?

`EOMONTH(date, months)` is robust because it correctly handles moving across years and different month lengths. For example, `EOMONTH(DATE(2024, 12, 15), 1)` correctly returns `2025-01-31`.

6. What happens if my date table is not marked as a date table?

Time intelligence functions may return errors or unexpected results. It is a best practice to explicitly mark your date table in the model view to ensure DAX behaves correctly.

7. How do I get the name of the current month (e.g., "January")?

You can use the `FORMAT` function: `FORMAT(TODAY(), "MMMM")` will return the full month name.

8. Is there a single function to get the next month's data?

Yes, the `NEXTMONTH` function returns a table containing all dates in the next month. You can use it inside a `CALCULATE` statement, like `CALCULATE(SUM(Sales[Sales]), NEXTMONTH('Date'[Date]))`. Our DAX time intelligence functions overview has further examples.