Is it in regard to or in regards to?

It is in regard to, not in regards to (e.g., “I am writing in regard to your recent inquiry about our products”).

“In regard to” means “concerning” and is used interchangeably with “in regards to.” However, “in regard to” is the standard form that you will find in dictionaries, so it is best to say and write “in regard to” in formal contexts. The word to is a preposition in this phrase.

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