Types of Resumes: Which Format Gets You Past the Algorithm

There are three main types of resumes: reverse-chronological, functional, and combination. They are not interchangeable, and the differences matter more than most career advice would suggest. One of them is built for how hiring actually works in 2025. One of them gets recommended constantly by people who haven't tested it against an ATS. And one of them is for a specific situation most job seekers aren't in.

The types of resumes aren't just different arrangements of the same information. They signal different things to the algorithm, parse differently across platforms, and produce meaningfully different scores. The resume you choose isn't a style preference — it's a technical decision.

Starting with the answer, because that's how these things should work: use reverse-chronological. Unless you have a specific reason not to, which I'll get to. But you probably don't have that reason.

The Three Types of Resumes, Explained

Every resume format is a different answer to the same question: how do I organise my work history and skills so that an ATS system and a recruiter can both quickly confirm I'm worth calling?

The three formats give three different answers. Only two of those answers still work in a world where 98% of Fortune 500 companies use applicant tracking software to screen applications before a human reads them — a figure confirmed by Jobscan's survey of 500+ HR professionals.

1. Reverse-Chronological

The most widely used resume format by a significant margin. Your most recent job appears first, followed by each previous role in reverse order. The work history section is the centrepiece. Skills, education, and certifications follow.

Structure:

• Contact information
• Summary (optional but recommended — this is where your primary keywords go)
• Work experience — most recent job listed first
• Skills section
• Education
• Certifications or additional sections

Who it's for: Almost everyone. If you have at least two years of relevant work experience and your career has moved in a mostly forward direction, this format works. Greenhouse, Workday, Lever, Taleo, and iCIMS are all built around parsing it. Recruiters scan it in under 10 seconds and find what they need. It is the default because it works.

ATS compatibility: High across all major platforms. The timeline-based structure maps cleanly to how applicant tracking systems extract and categorise work history. Job titles, employer names, dates, and skill keywords are parsed correctly and scored in the expected fields. No friction, no garbled output, no score penalty for layout choices.

One thing worth knowing: the summary at the top of a reverse-chronological resume is prime keyword real estate. ATS systems score the summary field separately from the work experience section, so a well-written summary that mirrors the job description's exact language can meaningfully improve your score before the algorithm even reaches your first bullet point.

2. Functional (Skills-Based)

The functional resume leads with a skills summary and minimises the work history. Instead of listing your jobs in order, you group your experience under skill categories — "Project Management," "Client Communication," "Technical Skills" — with supporting bullet points under each. Employer names and dates are often moved to a brief section at the bottom, sometimes without detail.

The pitch for this format: if you have employment gaps, are changing careers, or have a non-linear history, it lets you present skills front and centre rather than your timeline. You get to control the narrative. Career coaches have recommended it for decades on exactly this logic.

The problem is that this pitch was written for a human reader. The algorithm doesn't follow your narrative. It scans top-to-bottom looking for job titles, employer names, employment dates, and keyword matches in their expected fields. When those fields are missing, minimised, or presented as prose rather than structured data, the score suffers — regardless of how good the underlying content is.

Who it's supposedly for: Career changers, people returning from long gaps, recent graduates with limited work history, people with unconventional paths.

ATS compatibility: Low to medium. The data on this is not encouraging. More in the next section.

3. Combination (Hybrid)

The combination resume opens with a robust skills section — typically 8–15 hard skills listed clearly — followed by a full reverse-chronological work history. You get the structured keyword extraction of a dedicated skills section plus the clean timeline that ATS parsers expect from the experience section.

Structure:

• Contact information
• Summary
• Skills section — prominent, early, keyword-dense
• Work experience — reverse-chronological
• Education and certifications

Who it's for: People with strong, relevant technical skills that deserve early visibility — engineers, data analysts, IT professionals, healthcare workers. Also the right choice for career changers who want to highlight transferable skills without hiding their timeline. The combination format lets you lead with your skills while giving the algorithm the structured data it needs.

ATS compatibility: High when done correctly. The dedicated skills section gives the parser early structured keyword data. The chronological history confirms the context. Both sections contribute to keyword scoring, which is why a strong skills section adds 10–15 points to an ATS score on average compared to the same resume without one, according to ATSFixer internal data.

The catch: most combination resumes I've reviewed get the skills section wrong. They fill it with soft skills — "team player," "strong communicator," "results-driven" — which the algorithm has learned to ignore. The skills section should contain hard, specific, keyword-rich terms that appear in the job descriptions you're targeting. "Stakeholder communication" is a hard skill in the right context. "Strong communicator" is noise.

What ATS Testing Actually Shows About Each Format

ATSFixer runs test resumes through Greenhouse, Lever, Workday, Taleo, and iCIMS weekly. The goal is to understand exactly how each platform parses different layouts and scores different structures — because what career advisors say about ATS compatibility and what actually happens in testing are sometimes different things.

Here's what the data shows about resume format and ATS scores:

Reverse-chronological resumes parse cleanly across all five platforms. Job titles, dates, and employer names are extracted accurately. Keywords in the experience section are picked up and scored. Average ATS score for a well-optimised reverse-chronological resume, before keyword tailoring: 65–75 out of 100.

Combination resumes score slightly higher than reverse-chronological when the skills section contains exact-match keywords from the job description. The skills section scores twice — once as a dedicated structured field and once in the full-text keyword pass — which explains the advantage. In our testing, a combination resume with a 12-keyword skills section consistently outperforms the reverse-chronological version of the same resume by 8–12 points.

Functional resumes are where the numbers get uncomfortable. In our testing, functional resumes with prominent skills narratives and minimised work history sections frequently confuse parsers. Greenhouse and Workday in particular struggle to extract valid employment dates when they're buried or absent. Some platforms flag the resume as structurally incomplete. Average ATS scores for functional resumes, same underlying content, different format: 40–55 out of 100.

That's not a marginal gap. That's the difference between appearing in a recruiter's top-15 shortlist and disappearing from the queue entirely.

A marketing manager with eight years of experience rebuilt her resume from a functional format — she'd been using it to downplay an 18-month career gap — to a combination format with a clear chronological history and a 12-skill section at the top. Same content. New ATS score: 68/100. She received three interview requests that week. The gap she'd been strategically obscuring was not mentioned by any of the three hiring managers. (The algorithm, it turns out, doesn't disqualify explained gaps. It disqualifies missing fields.)

The 88% of executives in the 2021 Harvard Business School and Accenture study who acknowledged their ATS rejects qualified candidates weren't describing a bug in the system. They were describing the feature. The ATS is designed to reduce 250 applications to 15 fast, not to find the best candidate. Format is the variable that controls whether you're in the 15 or the 235.

Which Type of Resume Should You Use?

Most career advice turns this into a quiz with six questions. Here's a shorter version.

You have 2+ years of relevant work experience

Use reverse-chronological. Your career history is your proof of competence. Add a skills section after your summary and you've effectively built a combination resume without the extra complexity. This covers the vast majority of job seekers.

You are changing careers or industries

Use combination, not functional. The instinct to bury your old career is understandable — you spent a decade in finance and you're applying for a product management role. But hiding your timeline doesn't help the algorithm. The algorithm doesn't read your career narrative. It checks whether your resume contains the keywords it's looking for and whether your employment history parses correctly.

A combination format lets you lead with transferable skills while keeping the structured timeline that ATS systems need to process your application. The career-change explanation belongs in your cover letter. The resume's job is to pass the algorithm. The cover letter's job is to explain why you're pivoting.

You are entry-level or a recent graduate

Use reverse-chronological, with your education section promoted above work experience. List internships, part-time work, freelance projects, class projects, and relevant academic experience in the experience section. The absence of a 10-year career is not a format problem — it's a content problem that the right structure can help with. A resume with no work experience doesn't need a different format. It needs the sections you do have filled with the best version of what you've got.

You have employment gaps

Still reverse-chronological. Name the gap honestly — "Career Break — Caregiving," "Career Break — Personal Health," "Freelance Consulting" — and include the date range as you would for any role. A recruiter who sees a two-year gap with a label will move on. A recruiter who sees a two-year gap with no explanation will assume the worst, because they have nothing else to fill in the blank with.

The functional resume doesn't hide gaps. It makes gaps suspicious by drawing attention to what you're trying not to show. A LinkedIn recruiter survey found that unexplained gaps are the number one reason recruiters request clarification before scheduling a call — which means explained gaps almost always proceed without issue. Format your timeline honestly and let the gap explain itself.

The Resume Type That Almost Always Backfires

I'll be direct about the functional resume because nobody else seems to want to be: it is the wrong choice for the vast majority of people who use it, and it's wrong for a structural reason that no amount of good writing overcomes.

The functional format was designed for a world where a human recruiter did the first read and you could use layout to guide their attention. You lead with your strengths. You minimise the awkward timeline. You control what they see first.

That world ended roughly when ATS adoption hit critical mass — around 2015 for enterprise, a few years later for mid-market companies. Now 98% of Fortune 500 companies use an ATS, and the algorithm doesn't follow your narrative. It extracts data from expected fields. When those fields are missing or restructured, the score drops before a human ever sees the document.

The people who most need a functional resume — career changers, people with gaps, people re-entering the workforce — are also the people for whom a low ATS score is most damaging, because they already face additional scrutiny. Choosing a format that penalises you algorithmically compounds a problem you were trying to solve.

Narrow exceptions exist: creative portfolios where the resume is largely ceremonial, roles at very small companies (under 50 employees) that don't use an ATS at all, or situations where you're applying directly to a named hiring manager who requested your resume personally. In all of these cases, a human is doing the first read and the format logic flips. But if you're applying through a company's careers page or an ATS-backed job board — which describes most applications — the functional resume is working against you.

The combination format solves everything the functional format claims to solve, without the ATS penalty. If you're currently using a functional resume for any of the reasons above, consider rebuilding it as a combination format before your next application batch.

Format Rules That Apply to Every Resume Type

Regardless of which type you choose, these structural rules are non-negotiable for ATS compatibility. They apply to chronological, combination, and — if you must — functional resumes alike.

Single column only. Two-column layouts, sidebars, and text boxes break parsers on every major platform. ATS systems read left-to-right in a single pass — a sidebar with your skills list gets merged with your job titles and produces garbled text. In ATSFixer's internal testing, 1 in 3 resumes submitted through Workday are corrupted during parsing because of columns, tables, or text boxes. The resume that looks polished in a PDF viewer often looks like a ransom note to the parser. (This is not how I would recommend testing this hypothesis on a live application.)

Submit as a text-selectable PDF. Open your resume in a PDF viewer and try to highlight a word with your cursor. If you can't, neither can the parser. Image-based PDFs — exported from Canva, InDesign, Adobe Illustrator, or Figma — score zero on every ATS platform. The algorithm processes blank pages.

Use standard section headers. "Work Experience," "Skills," "Education," "Certifications." Not "My Professional Journey," "Core Competencies," or "Where I've Been." ATS systems match against a list of recognised header terms. An unusual header is a section that doesn't get parsed into the correct field — which means its content doesn't get scored.

Mirror the job description's exact language. If the posting says "data analysis," your resume should say "data analysis." If it says "Python," it should say "Python." Not "data analytics" — not "scripting experience in Python." Most ATS platforms do exact-phrase matching on keywords, not semantic matching. Synonyms score zero on platforms like Greenhouse and Workday, even when the synonym is more precise or more impressive. The algorithm isn't reading for quality. It's checking a list.

Standard fonts only. Calibri, Arial, Garamond, Georgia, Times New Roman. Decorative or custom fonts that the parser doesn't recognise get substituted with a default, which can shift your layout and break field detection. The safest resume is a boring-looking one that scores well. You can reclaim your visual identity at the interview.

If you want to know where your current resume stands — regardless of format — paste it into ATSFixer. The score reflects what the algorithm actually sees. The breakdown shows which fields parsed correctly, which keywords registered, and which sections are costing you points. It takes about 30 seconds. Faster than rebuilding your resume on a hunch.

You've now read more about resume formats than 90% of job seekers will ever bother to. Whether or not that's a good use of your afternoon is a question only your interview inbox can answer — but at least you'll know it was the algorithm's fault, not yours.