Written by Allen Wyatt (last updated July 2, 2022)
This tip applies to Excel 2007, 2010, 2013, 2016, 2019, 2021, and Excel in Microsoft 365
The EOMONTH function is used to return the serial number value for the last day of any particular month, past, present, or future. The syntax for the function is as follows:
=EOMONTH(base, offset)
The base value is a date from which the function should do its calculations, and the offset is a number that indicates how many months from the base date should be used. For instance, an offset of 0 would indicate that EOMONTH should return the last day of the month represented in base, whereas an offset of 4 would be four months after base, and -2 would be two months before.
As an example, the following are typical uses of EOMONTH. The first line can be used to return the last day of the current month, and the second line returns the last day of the month six months later than the date in A1:
=EOMONTH(NOW(),0) =EOMONTH(A1,6)
Remember that EOMONTH returns a serial number. Excel does not automatically format the serial number as a date. In other words, you will need to explicitly format the cell as a date.
ExcelTips is your source for cost-effective Microsoft Excel training. This tip (12156) applies to Microsoft Excel 2007, 2010, 2013, 2016, 2019, 2021, and Excel in Microsoft 365. You can find a version of this tip for the older menu interface of Excel here: Using the EOMONTH Function.
Program Successfully in Excel! This guide will provide you with all the information you need to automate any task in Excel and save time and effort. Learn how to extend Excel's functionality with VBA to create solutions not possible with the standard features. Includes latest information for Excel 2024 and Microsoft 365. Check out Mastering Excel VBA Programming today!
Programmers know that a staple of any language is the ability to create conditional statements. Excel understands this, ...
Discover MoreIf you need to do a lot of work with whole numbers (integers), then you may wonder which of three functions you should ...
Discover MoreExcel allows you to easily convert values from decimal to other numbering systems, such as hexadecimal. This tip explains ...
Discover MoreFREE SERVICE: Get tips like this every week in ExcelTips, a free productivity newsletter. Enter your address and click "Subscribe."
There are currently no comments for this tip. (Be the first to leave your comment—just use the simple form above!)
Got a version of Excel that uses the ribbon interface (Excel 2007 or later)? This site is for you! If you use an earlier version of Excel, visit our ExcelTips site focusing on the menu interface.
FREE SERVICE: Get tips like this every week in ExcelTips, a free productivity newsletter. Enter your address and click "Subscribe."
Copyright © 2025 Sharon Parq Associates, Inc.
Comments