How to get the last day of the month in Excel
Formula (Excel and Google Sheets)
=EOMONTH(B2,0)Use =EOMONTH(date, 0). The 0 means this month; 1 is next month and -1 is last month.
- Result on the example
- one result per row in
C2, filled down toC6 - Works in
- Every current version
- Google Sheets
- Same formula
See it work
The formula is already in C2, filled down to C6. Change any input and the result updates, or edit the formula to experiment.
How it works
EOMONTH ("end of month") returns the last day of the month a given number of months away. With 0 it stays in the same month, and it knows about leap years: February 2028 ends on the 29th.
=EOMONTH(B2,0)Result1/31/2026 (46053)
B21/8/2026The value in B2.
EOMONTH(B2,0)1/31/2026 (46053)EOMONTH: Last day of the month, months away.- start_date
B21/8/2026 - months
0
- start_date
In Google Sheets
The same formula works in Google Sheets: =EOMONTH(B2,0). We ran it in Google Sheets mode on the same data and it returns the same results.
Other ways to do it
Each one was run on the same example sheet.
| Formula | Result | When to use it |
|---|---|---|
| =DATE(YEAR(B2),MONTH(B2)+1,0) | 1/31/2026, 2/28/2026, 2/29/2028… | Day 0 of next month is the last day of this month. Works in any version. |
| =EOMONTH(B2,-1)+1 | 1/1/2026, 2/1/2026, 2/1/2028…Different result | The first day of the month instead. First day of the month. |
Common mistakes
- EOMONTH returns a serial number; format the cell as a date.
- For "end of next month" terms, use 1 instead of 0.
Try it yourself
Same data, empty answer cell. Your formula is graded instantly, then re-checked on changed data, so a typed-in number won't pass.
Get the last day of the month
C2, return the last day of the invoice's month, and fill down to C6.Questions
How do I get the first day of the month?
=EOMONTH(B2,-1)+1, or =DATE(YEAR(B2),MONTH(B2),1).
How many days are in the month of a date?
=DAY(EOMONTH(B2,0)).
Checked by running on 2026-10-29: every formula and result on this page was calculated by the Spreadsheet Practice formula engine, in both Excel and Google Sheets modes.