Please Note: This article is written for users of the following Microsoft Excel versions: 2007, 2010, 2013, 2016, 2019, 2021, 2024, and Excel in Microsoft 365. If you are using an earlier version (Excel 2003 or earlier), this tip may not work for you. For a version of this tip written specifically for earlier versions of Excel, click here: Creating Add-Ins.
Any Excel workbook can be converted to an add-in. The steps you need to follow to create an add-in are very precise, and may seem a bit overwhelming (particularly the first couple of times you do it). To create a protected add-in file, you need to do a little work in the VBA Editor and in Excel itself. First, here are the steps to follow to get the settings correct in the VBA Editor:

Figure 1. The Protection tab of the project�s Properties dialog box.
Now it is time to do a little work in Excel. Follow these steps if you are using Excel 2010 or a later version:

Figure 2. The Summary tab of the workbook�s Properties dialog box.
The steps are slightly different in Excel 2007:
Note:
ExcelTips is your source for cost-effective Microsoft Excel training. This tip (8528) applies to Microsoft Excel 2007, 2010, 2013, 2016, 2019, 2021, 2024, and Excel in Microsoft 365. You can find a version of this tip for the older menu interface of Excel here: Creating Add-Ins.
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2026-06-21 10:32:00
J. Woolley
The Tip's first 9 steps apply protection. This is not necessary, especially if you don't intend to distribute your add-in. If you create an add-in strictly for your own use, I recommend leaving it unprotected because it is easier to maintain.
Like Personal.xlsb, your custom add-in's procedures can be used in multiple workbooks, but first your add-in must be installed; the Tip does not address that part.
My Excel Toolbox references these five articles about creating, installing, and updating a custom Excel add-in:
https://www.myonlinetraininghub.com/create-an-excel-add-in-for-user-defined-functions-udfs
https://bettersolutions.com/excel/add-ins/creating.htm
https://bettersolutions.com/excel/add-ins/installing.htm
https://support.microsoft.com/en-us/Search/?query=Excel+add-in
https://www.thevbahelp.com/post/installing-and-updating-add-ins
My Excel Toolbox's unprotected add-in file is distributed via download.
See https://sites.google.com/view/MyExcelToolbox/
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.
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