Custom Functions requirement sets

Custom Functions use separate requirement sets from the core Excel JavaScript APIs. The following table lists the Custom Functions requirement sets, the supported Office client applications, and the minimum builds or versions for those applications where applicable.

Requirement set Office on Windows
(Microsoft 365 subscription)
Office on Windows
(Retail perpetual Office 2016 and later)
Office on Windows
(Volume-licensed perpetual)
Office on Mac Office on iPad Office on the web
CustomFunctionsRuntime 1.4 Version 2208 (Build 15601.20148) Not supported Not supported 16.64 Not supported Supported
CustomFunctionsRuntime 1.3 Version 2008 (Build 13127.20296) Version 2311 (Build 17029.20126) Office 2021: Version 2108 (Build 16.0.14332.20011) 16.40.20081000 Not supported Supported
CustomFunctionsRuntime 1.2 Version 1909 (Build 11929.20934) Version 2311 (Build 17029.20126) Office 2021: Version 2108 (Build 16.0.14332.20011) 16.34.20020900 Not supported Supported
CustomFunctionsRuntime 1.1 Version 1903 (Build 11425.20156) Version 2311 (Build 17029.20126) Office 2021: Version 2108 (Build 16.0.14332.20011) 16.34 Not supported Supported

Requirement set history

See also