Do footnote numbers go after the period?

Footnote numbers go after the period of a sentence in the main text that applies to the information in the footnote—like this.² For example, in Chicago style writing, each sentence that needs a citation has a superscript number after the period.

These superscript numbers in the main text are also referred to as callout numbers. There is no space between the period and the superscript callout number.

Callout numbers can also go after a comma or before an em dash or closing parenthesis—like this³—when the footnote only applies to a phrase or clause in the sentence.

When you’re using footnotes for citations, QuillBot’s free Chicago Citation Generator can also help you avoid errors.