By Quick answer: What are the hardest certifications to earn?
- Hours — CFA: 300+ per level.
- Experience — CISSP: five years.
- Hands-on — CKA: live cluster.
- Length — PMP: 240 minutes.
Key takeaways
- Difficulty often comes from experience rules, not just exams.
- Hard certifications are valued because they're hard.
- Plan months to years, not weeks.
Some certifications are hard because of exam difficulty, others because of experience rules, others because they're hands-on. These eight are demanding in different ways, and respected because of it.
Eight demanding certifications
Ranked for this reader. Costs and formats come from each issuer's own page, checked on 3 November 2026; prices change, so confirm before you book.
| # | Certification | Cost | Time | Prove it free |
|---|---|---|---|---|
| 1 | CFA ProgramCFA Institute | Check the official page1 | Check issuer | Free test |
| 2 | CISSP – Certified Information Systems Security ProfessionalISC2 | See ISC2 page2 | Check issuer | Free test |
| 3 | Financial Risk Manager (FRM)GARP | Check the official page3 | Two parts; Part I is 100 multiple-choice questions | Free test |
| 4 | Google Cloud Professional Machine Learning EngineerGoogle Cloud | $2004 | 2 hours, multiple choice | Free test |
| 5 | Certified Kubernetes Administrator (CKA)Linux Foundation / CNCF | $4455 | 2-hour hands-on, performance-based exam | Free test |
| 6 | PMP – Project Management ProfessionalPMI | $425 PMI members / $675 non-members6 | 240 minutes, 180 questions | Free test |
| 7 | CISM – Certified Information Security ManagerISACA | US$575 ISACA members / US$760 non-members7 | Check issuer | Free test |
| 8 | CBAP – Certified Business Analysis ProfessionalIIBA | $145 application fee plus exam fee8 | Check issuer | Free test |
Prove it free before you pay for an exam
Take the free test first. Pay for an exam only when you pass.
Every pick above has a matching free practice test on Science of Apps, one of the world's largest libraries of free certification tests (1,200+). Check your level before you pay for an exam, or add a verifiable credential to LinkedIn while you study. (Disclosure: we publish these tests; the certifications above earn us nothing.)
- CFA Level 1 Practice QuestionsPractise for CFA Program before you pay.Start free test →
- CISSP Practice TestPractise for CISSP – Certified Information Systems Security Professional before you pay.Start free test →
- FRM Part 1 Practice ExamPractise for Financial Risk Manager (FRM) before you pay.Start free test →
- Google Professional ML Engineer Practice ExamPractise for Google Cloud Professional Machine Learning Engineer before you pay.Start free test →
Each certification, and what makes it hard
- CFA InstituteCFA ProgramStudy hoursCheck the official page
- ISC2CISSP – Certified Information Systems Security ProfessionalBreadth and experienceSee ISC2 page
- GARPFinancial Risk Manager (FRM)Quantitative depthCheck the official page
CFA Program
- Cost
- Check the official page1
- Entry
- Three exam levels; CFA Institute suggests 300+ study hours per level
Three levels; CFA Institute suggests 300+ study hours per level. The CFA Program is the leading investment credential, with three exam levels; CFA Institute suggests 300 or more study hours per level. Many candidates take several years, and passed levels are often listed on CVs.
Best forstudy hours
CISSP – Certified Information Systems Security Professional
- Cost
- See ISC2 page2
- Entry
- 5 years of paid security work experience
Five years of paid security experience and a broad exam. ISC2's senior credential covers eight broad security domains and requires five years of paid security experience. It's ANAB-accredited, and US holders averaged $168,060 in Skillsoft's 2025 survey, the highest of any IT certification there.
Best forbreadth and experience
Financial Risk Manager (FRM)
- Cost
- Check the official page3
- Format
- Two parts; Part I is 100 multiple-choice questions
Two parts; Part I has 100 questions. GARP's Financial Risk Manager is a two-part credential for risk professionals; Part I has 100 multiple-choice questions. It's quantitative and demanding; check GARP's page for fees.
Best forquantitative depth
Google Cloud Professional Machine Learning Engineer
- Cost
- $2004
- Format
- 2 hours, multiple choice
Professional-level ML on Google Cloud; two hours, $200. Google Cloud's professional exam tests production machine learning: framing problems, building pipelines and serving and monitoring models. It's two hours, costs $200 and is aimed at experienced ML engineers.
Best forproduction ML expertise
Certified Kubernetes Administrator (CKA)
- Cost
- $4455
- Format
- 2-hour hands-on, performance-based exam
Two-hour hands-on exam in a live cluster. The Linux Foundation's Certified Kubernetes Administrator is a two-hour, performance-based exam taken in a live cluster. It costs $445 including one free retake and is respected because it tests real hands-on skill.
Best forhands-on pressure
PMP – Project Management Professional
- Cost
- $425 PMI members / $675 non-members6
- Format
- 240 minutes, 180 questions
- Entry
- 3–5 years leading projects (by education) plus 35 hours of training
240 minutes, 180 questions; 3–5 years' experience. PMI's Project Management Professional is a 240-minute, 180-question exam covering predictive, agile and hybrid approaches. It needs 3–5 years leading projects plus 35 hours of training and costs $425 for PMI members or $675.
Best forexperience and length
CISM – Certified Information Security Manager
- Cost
- US$575 ISACA members / US$760 non-members7
Security management experience required. ISACA's credential for security managers covers governance, risk, programme management and incident management. It costs US$575 for ISACA members and US$760 for non-members and requires management experience.
Best formanagement experience
CBAP – Certified Business Analysis Professional
- Cost
- $145 application fee plus exam fee8
- Entry
- Business analysis experience required (see IIBA)
Business analysis experience required. IIBA's Certified Business Analysis Professional is the senior BA credential and requires business analysis experience. There's a $145 application fee plus the exam fee; see IIBA's page for current rules.
Best forexperience requirements
Types of difficulty
| Type | Example |
|---|---|
| Study volume | CFA |
| Experience rules | CISSP, CISM, CBAP |
| Hands-on | CKA |
| Endurance | PMP |
Table: What makes certifications hard
How we ranked these picks
We chose widely held certifications known for study volume, experience rules or hands-on exams. We don't cite pass rates we can't verify. Details from official pages, checked 3 November 2026.
Frequently asked questions
What is the hardest certification?
The CFA is often cited for its study volume.
What is the hardest IT certification?
CISSP for breadth and experience; CKA for hands-on difficulty.
Are hard certifications worth it?
Often; they're respected because they're hard.
How long does the CFA take?
Many candidates take several years for all three levels.
Is there a free practice test?
Yes. Science of Apps offers free CFA-style, CISSP and PMP tests.
Sources
- CFA Institute — CFA Program, official page (checked 3 Nov 2026)
- ISC2 — CISSP – Certified Information Systems Security Professional, official page (checked 3 Nov 2026)
- GARP — Financial Risk Manager (FRM), official page (checked 3 Nov 2026)
- Google Cloud — Google Cloud Professional Machine Learning Engineer, official page (checked 3 Nov 2026)
- Linux Foundation — Certified Kubernetes Administrator (CKA), official page (checked 3 Nov 2026)
- PMI — PMP – Project Management Professional, official page (checked 3 Nov 2026)
- ISACA — CISM – Certified Information Security Manager, official page (checked 3 Nov 2026)
- IIBA — CBAP – Certified Business Analysis Professional, official page (checked 3 Nov 2026)
- Checked November 4, 2026. Figures that change — fees, salaries, prices — are reviewed every six months; if something is out of date, tell us.
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