I.e. Punctuation
I.e. punctuation is a style-mechanics question rather than a different meaning of the abbreviation. This guide documents MLA treatment while keeping the recommendation scoped to that style system.
In MLA style, write i.e. with periods and follow it with a comma in the parenthetical use MLA recommends. Other editorial systems may format abbreviations differently, so follow the required house style.
Key details
Important caveats
Style Boundary
Do not turn one style manual’s punctuation rule into a universal grammar law; follow the required style guide, and spell out “that is” when clearer.
Further guidance
Comma
MLA places a comma after i.e. in the parenthetical constructions it recommends.
Form
In MLA style, the abbreviation is written “i.e.” with periods.
Practical Application
Treat punctuation around “i.e.” as a house-style decision. In MLA-style parenthetical use, retain the periods and follow “i.e.” with a comma; do not present that punctuation pattern as a universal rule for every editorial system.
Reader Check
Which style guide governs the document, and are you following its abbreviation and surrounding-punctuation rules consistently?
Worked Example
Under the documented MLA treatment, write a parenthetical such as “the final stage (i.e., publication)” with periods in “i.e.” and a comma after the abbreviation.
Sources and evidence
Sources are shown with the role they play in this guide. Historical or style-sensitive claims are kept within the evidence boundary described above.
- How do I use e.g. and i.e.? — MLA Style Center (opens in a new tab)Modern Language Association · Distinguishes e.g. (“for example”) from i.e. (“that is”) and documents MLA punctuation/style treatment