Resume formatting rules: ATS-safe templates that humans like too

Applicant tracking systems (ATS) became standard at most mid-sized and larger employers in the early 2010s and have been the gatekeeper for the majority of corporate hiring ever since. Workday, Greenhouse, Lever, Taleo, iCIMS, and SmartRecruiters between them handle most of the inbound resume volume at companies with more than about 50 employees. Each system parses uploaded resumes into structured data: name, contact, work history, skills. If the parser cannot read the file or makes a mess of the structure, the resume drops down the relevance ranking and may never reach a human at all.

The good news is that the formatting choices that make a resume ATS-safe are also the ones that make it readable to human recruiters in seven seconds. Single column, clear hierarchy, standard section names, no decorative graphics. The bad news is that almost every "modern" resume template available from design marketplaces breaks at least one of these rules. The premium two-column layouts with sidebar contact details, icon sets, and ambient pastel backgrounds look impressive on Behance but parse badly. The Society for Human Resource Management's 2023 guide to resume screening is explicit: "Use a clean, single-column layout in a standard font; avoid headers, footers, columns, and graphics that may not parse correctly."

Single column wins

Multi-column layouts are the most common ATS-killer. Many parsers read left-to-right across columns rather than down one column then down the next, which scrambles dates, employers, and bullet points into nonsense. Some newer ATS handle columns correctly; others do not; you cannot tell which company uses which version. The safe choice is a single column for the entire document. Sections stack vertically: contact at the top, optional summary, work experience, education, skills, optional extras.

A single column also makes the human read faster. Recruiters scan top to bottom, looking for company names, job titles, and dates. A two-column layout forces their eye to ping back and forth and slows the scan. Lou Adler's well-known seven-second study (cited in Ladders' 2018 eye-tracking research) was conducted on single-column resumes; multi-column layouts extend the scan time without delivering more information.

Fonts and sizes

Standard fonts parse cleanly and look professional. Calibri, Arial, Helvetica, Georgia, Cambria, and Times New Roman are all safe choices. Avoid Comic Sans (obvious), Papyrus (also obvious), and any condensed or display font that looks distinctive in a portfolio but causes parsing issues in plain text extraction. Calibri 11 has been the default in Microsoft Word since 2007 and is the single most common resume font in the corporate world for that reason alone.

Body size of 10 to 11.5 points keeps the resume readable without wasting space. Section headings can step up to 12 or 13 points, bolded. Your name at the top can run a step or two larger, often 16 to 20 points. Avoid anything smaller than 10 points anywhere on the page; it crosses the line from "tight" into "trying to hide content."

Use one font across the whole document. Mixing a serif font for headings and a sans-serif for body has its place in design but creates visual noise on a resume. If you want hierarchy, use bold and size differences within a single font family.

Standard section names

ATS parsers look for specific section labels to know what each block of content is. "Work Experience" or "Professional Experience" parses; "What I've Built" usually does not. "Education" parses; "Where I Learned It" does not. The reliable labels are: Summary (or Profile), Experience or Work Experience or Professional Experience, Education, Skills,Certifications, Publications, Languages, Projects. Use these even if they feel boring; the parser benefits and the recruiter recognises them instantly.

Date formats inside work experience should be consistent and machine-readable.Mar 2021 - Jul 2023 or 2021 - Present both work. Avoid decorative formats like '21 and any non-Latin number. Always include the year; "April - July" without a year confuses both the ATS and the recruiter.

Length by experience

For early-career professionals with under five years of full-time work experience, one page is the convention in the US and increasingly in the UK. Recent graduates can stretch to a page and a half if they have substantial research, internships, or projects to describe, but a single page forces the discipline of choosing the strongest material.

For mid-career professionals with five to fifteen years of experience, two pages is the standard. Three pages is acceptable for senior roles with a long publication or project list, but most hiring managers stop reading after page two. Anything beyond three pages signals an inability to edit, which is itself a negative signal in most roles.

For academic CVs, which are a different format entirely, length is unlimited and full publication lists are expected. A 30-page CV for a tenured academic is normal. Do not confuse the academic CV with a corporate resume; the conventions differ in nearly every respect.

File format

PDF is the safe default for almost every application. PDF preserves layout, renders identically across devices, and is parsed reliably by every major ATS. Save as PDF from Word or Google Docs rather than scanning a printed page; a scanned PDF is an image and cannot be parsed at all.

Some companies still request a Word document (.docx). When asked, send Word; the company's ATS may have been configured for one format only. Do not send .pages files (Apple Pages native format), .odt files, or any archive format. If the application portal accepts both, PDF is the better choice.

File name matters. Firstname-Lastname-Resume.pdf is clear, searchable, and respects the recruiter's downloads folder. Avoid generic names like resume.pdf or final-v3-actually-final.pdf. Some ATS systems use the file name in candidate listings, so a clear human-readable name helps you stand out.

What goes in each section

The contact section sits at the top. Name in larger type, then a single line of contact details: city and country (not full address), phone number with country code if relevant, email address (use a professional one, not a hotmail account from 2004), LinkedIn URL, optional portfolio or GitHub URL. No photo. The US, UK, Canada, and Australia all consider photos unprofessional on resumes; most other markets do too, though some Western European countries still expect them. Check the local convention if applying internationally.

The summary, when included, is a 2 to 4 sentence pitch that names your specialism, your years of experience, and what you are looking for next. Skip it on a one-page resume if space is tight; the rest of the document should make the pitch implicitly. The summary is most useful for career-changers, who need to frame their experience for a new field.

The experience section is the largest. List jobs in reverse chronological order. Each entry includes the company, role, location, and dates on one line (or one line plus a sub-line if necessary), followed by three to six bullet points describing impact. Bullets should start with strong verbs: "Built", "Led", "Reduced", "Designed", "Shipped". Quantified outcomes outrank adjectives every time. "Cut deployment time from 25 minutes to 3" beats "Significantly improved deployment processes".

The education section comes after experience for most professionals, before it for recent graduates with under two years of work experience. Include the degree, the institution, the location, and the dates. GPA or classification is optional once you are several years into your career; include it if it is strong.

The skills section is where ATS keyword matching does the most work. The ATS reads the job description, extracts skill keywords, and matches them against your resume. Include the specific technologies, languages, or tools the job ad mentions, but only those you can actually discuss in an interview. A skills list that includes Kubernetes when you have used it twice is a trap waiting to spring.

Tailoring without rewriting

Every application benefits from light tailoring. Adjust the summary (if you have one), reorder the bullets in the most relevant job to lead with the outcomes that match the role, and tweak the skills section to mirror the job ad's language. Do not invent experience or copy phrases that misrepresent what you did; both are easy for an interviewer to expose. The goal is to surface the relevant truth more prominently, not to manufacture relevance.

For a high-volume application strategy (say, 30 to 50 applications per week), a master resume with three or four variants for the main role types you target is more sustainable than tailoring every application from scratch. The variants share the same structure but differ in the bullet ordering and the skills list.

Common mistakes

Headers and footers cause parsing failures in many ATS. Putting your name and contact details in the Word header section of the page (rather than as normal text at the top of the body) means some parsers miss them entirely. Always put contact details in the body of the document.

Tables for layout are another classic ATS-killer. Word's table feature is sometimes used to align two columns of text or to create section dividers. Some parsers handle tables; some do not. The safer approach is to use plain tabs or simple horizontal lines. If you need precise layout, set the layout in plain text first and let the formatting follow.

Cute icons for phone numbers, email addresses, and LinkedIn URLs come from template marketplaces and do not parse. They also waste space the human reader could use for an extra bullet point. The label "Phone:" or no label at all (since the format reveals what it is) works better.

What to do next

Check the word count of your resume with the Phrasit word counter (under 400 words per page is a good target for readability), run the prose through the grammar checker to catch the article and verb-tense slips that look careless, and use the case converter to keep section headings consistent.