How to Create a Formula to Increase a Date by 1 Month

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Microsoft Excel is a powerful program. If you are using it for a calendar or anything else where you might need to find the date exactly 1, 2, or 3 months after another date here is a formula you can use.

Things You Should Know

  • The DATE function makes it easy to increment dates by days, months, or years.
  • When editing a formula with the DATE function, you can simply add +1 to the month.
  • You can also use the EDATE function to increase the date by one month.


  1. How.com.vn English: Step 1 Turn on your computer and open a new or existing Excel spreadsheet.
  2. How.com.vn English: Step 2 In any cell, for this example we will use A2, type in you date.
    Ex. 1/1/2006
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  3. How.com.vn English: Step 3 In a different cell, for this example we used B2, type in the amount of months cell A2 is to be incremented by.
    Ex. 5
  4. How.com.vn English: Step 4 In the last cell type the formula:

    =DATE(YEAR(A2),MONTH(A2)+B2,MIN(DAY(A2),DAY(DATE(YEAR(A2),MONTH(A2)+B2+1,0))))replacing what is in bold with the appropriate cells for your spreadsheet.
  5. How.com.vn English: Step 5 You will see that this cell now has the calculation desired.
  6. How.com.vn English: Step 6 Another option is...
    Another option is to use =EDATE(start_date,months)
    This is a simpler method but can only be used if the Analysis ToolPak add-in is installed.
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      • Calculating the Day is complicated due to the varying 30 and 31 day months. This formula will take a date like 10/31/2006 and add 1 month to become 11/30/2006. Whereas, a more simple formula without the MIN function may give the incorrect date of 12/1/2006.
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      How.com.vn is a “wiki,” similar to Wikipedia, which means that many of our articles are co-written by multiple authors. To create this article, 22 people, some anonymous, worked to edit and improve it over time. This article has been viewed 331,406 times.
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      Co-authors: 22
      Updated: October 25, 2022
      Views: 331,406
      Categories: Spreadsheets
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