AP style is the set of rules for spelling, grammar, punctuation and usage published by The Associated Press and used by most US newsrooms, and the quick answer for PR writers is this: matching the style of the outlets you send work to removes friction, while everyday errors with numbers, dates, titles and capitalization quietly mark a release as amateur. This article covers the rules themselves: what AP style is, and the specific conventions for numbers, dates and times, titles, capitalization, punctuation and datelines. It is about style, not document layout. Two honest notes before the rules: the AP Stylebook is updated over time, and individual outlets keep house variations, so treat this as the working core and check the current edition for anything unusual.
Table of Contents
- What is AP style?
- Why does AP style matter to PR writers?
- AP style rules for numbers
- AP style rules for dates and times
- AP style rules for titles
- AP style rules for capitalization
- AP style rules for punctuation
- Datelines as an AP style rule
- Common AP style mistakes PR writers make
- How to make AP style a habit
- Frequently asked questions
What is AP style?
AP style is a standardized set of writing conventions, maintained by The Associated Press in its Stylebook, that governs how numbers, dates, names, titles, punctuation and thousands of individual words are written in news copy.
The point of any style guide is consistency at speed. Newsrooms process copy from hundreds of writers; a shared rule set means a reader never pauses over whether “3” and “three” in the same story mean different things, and an editor never has to decide basic formatting case by case. AP style grew to serve wire copy, so its bias is toward brevity and clarity: shorter forms, minimal capitalization, and punctuation that earns its place. Other guides exist (Chicago for books, various in-house styles for companies), and they genuinely disagree with AP on points like the serial comma. For PR writing aimed at US journalists, AP is the reference that matters, because it is the style the receiving desk applies. Writing in the receiver’s style is a courtesy with a practical edge: less editing stands between your copy and the editor’s decision about the story itself.
Why does AP style matter to PR writers?
Style errors rarely kill a story outright; editors fix them. Their cost is cumulative credibility. A release that writes “October 18th,” lowercases job titles wrongly and spells out 47 shows, in small ways, that the sender does not write for newsrooms often. The opposite signal also registers: copy that arrives clean on the recurring rules reads as professional before its first fact is checked. Style is also where accuracy hides. Writing “over 150 people” for “more than 150,” misplacing a state abbreviation in a dateline, or giving an executive a title she does not hold are not typos; they are wrong facts wearing style’s clothing. The rules below are the ones that recur in daily PR writing. Master these, and reserve your Stylebook lookups for the genuinely obscure entries. The same discipline applies wherever you write for journalists, including the outreach contexts shown in our media pitch examples of what works and what fails.
AP style rules for numbers
The basic rule
Spell out numbers below 10 and use figures for 10 and above: “three reporters,” “12 outlets,” “the team of six,” “140 attendees.” The reasoning is visual: single digits are short words, double digits scan faster as figures. Most of the exceptions below exist because certain kinds of numbers almost always carry data weight.
Exceptions that use figures
- Percentages. Always figures, with the % sign and no space: 4%, 12.5%. Not “percent” spelled out, and never a space before the sign.
- Ages. Always figures: a 6-year-old program, the founder, 52, said. Note the hyphens when age is used as an adjective before a noun.
- Money. Figures with the dollar sign and no trailing zeros unless exactness matters: $5, $120, $3 million. Write “$3 million,” not “$3 million dollars,” and keep large amounts short rather than writing out long strings of zeros.
- Dimensions, speeds, temperatures and scores. Figures: 6 feet 2 inches, 55 mph, 78 degrees, a 3-1 vote.
- Dates and times. Figures, covered in the next section.
Numbers that stay spelled out
Spell out a number that begins a sentence (“Forty people attended”), or better, restructure the sentence so it does not. Spell out casual expressions (“a thousand thanks”), fractions below one in many contexts (“two-thirds”), and ordinals below 10 (“first,” “second”); use figures with letters for 10th and above (“the 12th year”). Mixed usage in one sentence follows the category rule, not cosmetics: “The panel had 4 staff members and 14 guests” is correct because each number follows its own rule, even though it looks uneven.
AP style rules for dates and times
Months and days
When a month is used with a specific date, abbreviate the months that take abbreviation: Jan., Feb., Aug., Sept., Oct., Nov. and Dec. March, April, May, June and July are never abbreviated. When the month stands alone or with only a year, spell it out in full and do not use a comma before the year in that construction: October 2026. Use figures for the day with no ordinal endings: Oct. 18, not Oct. 18th. Do not pad with unnecessary words; AP copy generally omits “on” before a date when the sentence works without it.
Times
Use figures with a.m. and p.m. in lowercase, with periods: 9 a.m., 3:30 p.m. Drop the :00 for exact hours. Write noon and midnight as words, never 12 p.m. or 12 a.m., which confuse even careful readers. Time zones, when they matter to the reader, are given as standard abbreviations after the time. A related habit worth copying: give day and date together when a release looks forward (“Tuesday, Oct. 20”) only when the day adds clarity, and check the pairing every time, because a wrong weekday undermines an otherwise correct date faster than any formatting slip.
AP style rules for titles
People’s titles
Capitalize a formal title only when it comes immediately before a person’s name: “Chief Executive Officer Dana Ruiz said.” Lowercase it standing alone or after the name: “Dana Ruiz, chief executive officer of the company, said” and “the chief executive officer announced.” Descriptive phrases are not titles and stay lowercase even before a name: “astronaut trainer” describes work, it does not name an office. Abbreviations such as Dr., Gov. and Sen. follow their own entries, and courtesy titles (Mr., Ms.) are generally not used in AP news style beyond specific contexts. Getting titles right is a credibility rule as much as a style one: inflating a description into a capitalized title is a common PR habit that newsroom readers notice.
Titles of works
Put quotation marks around the titles of books, movies, songs, television shows and similar creative works. Do not use quotation marks for reference works, newspapers and magazines: the AP Stylebook itself, and a newspaper such as The Washington Post, take no quotes and no italics in AP copy. Capitalize the principal words of a work’s title, including prepositions and conjunctions of four or more letters.
AP style rules for capitalization
AP capitalization runs lean: when in doubt, lowercase is usually the AP instinct. Capitalize proper nouns (names of people, places, organizations and specific things) and proper adjectives. Lowercase seasons (spring, fall), lowercase job descriptions and general academic subjects (history, marketing), and lowercase compass directions used as directions (drive west). Capitalize regions used as names (the Midwest, the South). Government and institutional words split: capitalize Congress and the Senate as bodies; lowercase generic uses and words like federal and state as adjectives in most constructions (state law, federal court is capitalized as part of a specific court’s name: U.S. District Court). Brand names keep the capitalization their owners use in formal naming, but beware carrying marketing capitalization (all-caps product names, stylized lowercase logos) into news copy; AP trims many of these to standard forms. The practical test for PR writers: a capital letter claims that something is a unique name. If the word would apply to any company, office or season, the capital is decoration, and AP removes decoration.
AP style rules for punctuation
The serial comma
AP does not use the serial (Oxford) comma in a simple series: “red, white and blue.” Use the comma before the final item only when the series is complex, contains conjunctions within items, or would be ambiguous without it. This single rule generates more PR copy edits than any other, because many organizations’ house styles (and most writers’ schooling) go the other way.
Quotation marks
Periods and commas go inside closing quotation marks in AP style, always. Other punctuation follows logic: a question mark goes inside only if it belongs to the quoted material. Use double quotation marks for direct quotes and single marks only for a quote inside a quote. Quote sparingly and exactly: a quotation is a factual claim about what someone said, which is why the style rules around it are strict.
Other frequent points
- Em dashes take spaces on both sides in AP style, unlike most other styles: “The plan, delayed twice, was finally approved.”
- Hyphens join compound modifiers before a noun (a full-time job) but not after the noun, and are generally not used with adverbs ending in -ly (a newly opened office).
- Apostrophes form possessives in the standard pattern, with singular proper names ending in s taking only an apostrophe in AP style (Kansas’ laws). Plurals of single letters take an apostrophe (A’s), most other letter and number plurals do not.
- Ellipses are treated as a three-dot character with spaces around, used to show condensed quotations, and colons are lowercase after them unless the following word is a proper noun or a complete sentence.
Datelines as an AP style rule
The dateline, the place line at the start of a news story, is style in its purest form: nothing about it is grammar, everything is convention. AP datelines put the city in capitals, followed by the AP abbreviation for the state, which often differs from the postal code: Ariz., Calif., Fla., Ill., Kan., N.Y. and Tex. are AP forms, not AZ, CA, FL, IL, KS, NY and TX. Certain widely recognized cities stand alone with no state, because readers do not need the help. Foreign datelines follow their own country conventions. PR writers borrow the same conventions in releases, and the details matter for credibility: using a postal abbreviation in a dateline is one of the fastest tells that copy was written without the Stylebook open. For the purpose and history of the line itself, see our companion guide, what a dateline in a press release is. Note the boundary of this article’s advice: how to style a dateline is AP knowledge; where a dateline sits in a document is layout, and style rules have nothing to say about it.
Common AP style mistakes PR writers make
- “October 18th, 2026.” Wrong month form, ordinal suffix, and punctuation in one small package. Correct: Oct. 18, 2026.
- “Over 200 people attended.” AP uses “more than” for amounts: more than 200 people. “Over” is for physical position.
- The Oxford comma everywhere. Correct in many house styles, edited out in AP copy.
- Percent spelled out with a numeral: “8 percent.” AP: 8%.
- Capitalized titles after names: “Ruiz, the Chief Executive Officer.” AP lowercases after the name.
- “12 noon” or “12 p.m.” AP writes noon or midnight.
- Postal state codes in datelines. Phoenix takes Ariz. in AP style.
- Company as “they.” AP treats companies and organizations as singular: the company said it will, not they will, and names take “which” rather than “who.”
None of these errors involves obscure knowledge. They are the same ten slips, recycled, which is good news: they are the easiest category of professional improvement to make.
How to make AP style a habit
Keep the current Stylebook or its online edition reachable wherever you draft, and build a one-page personal list from your own corrections: the entries you have looked up twice are the entries you need on paper. When your organization’s house style differs from AP on purpose (a product name, a preferred term), write the exceptions down in one place so the difference is a decision rather than drift, and apply them consistently. Finally, do a dedicated style pass, separate from your content edit: read once for the rules above and nothing else. Writers who check style while checking facts do neither well. Copy that follows these rules will still be edited by newsrooms for their own variations, as all copy is; the goal is not perfection but arriving already speaking the local language. Those habits apply across every format a PR writer produces, including the documents structured in our step-by-step press release guide.
Frequently asked questions
What does AP stand for?
The Associated Press, the US news cooperative whose Stylebook sets the conventions most American newsrooms follow.
Does AP style use the Oxford comma?
Not in simple series: “red, white and blue.” AP adds the comma before the last item only for complex or ambiguous series.
How does AP style write percentages?
With a numeral and the % sign, no space: 8%. This applies to all percentages in AP copy.
How are dates written in AP style?
Abbreviate the months that take it when a day is given (Oct. 18), spell the month out when it stands alone, use figures for days, and skip ordinal endings like “18th.”
Does AP style apply outside the United States?
It is the standard for US news media and widely followed by international outlets publishing in English for American audiences. Other markets use their own guides, so match the style of the outlets you are writing for.
AP style asks for a modest, learnable discipline: figures where figures belong, restraint with capital letters, dates and times in their newsroom forms, and punctuation that follows the book rather than habit. Get those right every time, and journalists can spend their editing minutes on your story instead of your style.
