The IASSC Green Belt exam has 100 graded questions and a 3-hour time limit. It is a closed book, proctored exam. Some forms add up to 10 non-graded questions, so you may see up to 110. The questions are multiple choice and true/false, with about 20 from each major section of the Body of Knowledge.
You need a minimum score of 70% to earn the designation. That means you can miss up to 30 of the 100 graded questions. IASSC’s on-demand page lists the fee at $350. Plan for about 1.8 minutes per question, and treat every question as if it counts.
Quick-Reference Table: IASSC Green Belt Exam at a Glance
| Item | Detail |
| Graded questions | 100 |
| Possible extra questions | Up to 10 non-graded, on some forms |
| Time allowed | 3 hours (180 minutes) |
| Question types | Multiple choice and true/false |
| Book rule | Closed book, proctored |
| Topic split | About 20 questions from each major section |
| Passing score | 70% minimum |
| Fee (IASSC on-demand page) | $350 USD |
| Prerequisites | None to sit the exam |
Fees and rules change. Verify each figure on IASSC’s website before you book.
Table of contents
Key Takeaways
- The answer is 100 graded questions. Some exam forms add up to 10 more that do not count.
- You can miss up to 30 graded questions. The pass mark is 70% overall.
- Time is generous but not endless. Three hours across 100 questions gives about 1.8 minutes each.
- The topic split is even. About 20 questions come from each major section, so no phase is a throwaway.
- The exam tests knowledge, not project delivery. IASSC lists no prerequisites.
- Timed practice beats passive reading. Train with full 100-question mocks before you book.
Introduction
The IASSC Green Belt exam has 100 questions. That number comes straight from IASSC. IASSC describes it as a 100 question, closed book, proctored exam with a 3 hour allotted time.
Here is the detail many guides skip. Some forms of the exam may also include up to an additional 10 non-graded questions. IASSC calls them non-graded. The pages I reviewed do not say whether candidates can tell which questions are unscored.
Plan as if every question counts. You may see up to 110 questions on test day. Your passing target stays the same.
Public, Onsite, Virtual, and Online Six Sigma Certification Training!
- We are accredited by the IASSC.
- Live Public Training at 52 Sites.
- Live Virtual Training.
- Onsite Training (at your organization).
- Interactive Online (self-paced) training,
The IASSC Green Belt Exam Blueprint: What Is Actually on It
The exam draws evenly from the five DMAIC sections. IASSC says it includes approximately 20 multiple-choice and true/false questions from each major section of the Green Belt Body of Knowledge.
| Section | About This Many Questions | Typical Topics (summary, not an official list) |
| Define | 20 | Voice of the Customer, project charter, problem statement, SIPOC |
| Measure | 20 | Process mapping, data types, sampling, measurement system checks, process capability |
| Analyze | 20 | Root cause tools, hypothesis testing, correlation and regression basics |
| Improve | 20 | Solution selection, FMEA, pilots, basic experiments |
| Control | 20 | Control charts, control plans, mistake-proofing |
The topic column is a plain-language summary. Check IASSC’s official Body of Knowledge for the exact list.
Equal weight is a useful clue. Analyze feels hardest to most learners. It still carries only 20 questions, the same as Define and Control. This is my analysis. Secure the easier sections first, then close gaps in the harder ones.
The Passing Math
The pass mark is 70%. Candidates must reach a minimum score of 70% to earn the IASSC Certified Green Belt designation. On 100 graded questions, that means 70 correct answers. You may miss 30.
The sources I reviewed state an overall minimum. I found no per-section minimum in them. A weak phase can still sink a strong overall score if it drags you under 70, so do not skip any section.
The Time Math and a Pacing Plan
Three hours equals 180 minutes. Divide by 100 questions, and you get 1.8 minutes per question. If you see 110 questions, that drops to about 1.6 minutes each.
Use a two-pass approach. Answer fast on the first pass, flag hard items, and return later. This pacing plan is my suggestion.
| Checkpoint | Question to Reach | Elapsed Time |
| 1 | Question 25 | 30 minutes |
| 2 | Question 50 | 60 minutes |
| 3 | Question 75 | 90 minutes |
| 4 | Question 100 | 120 minutes |
| Review | Flagged items | Last 60 minutes |
At 1.2 minutes per question, your first pass takes about 120 minutes. That leaves about 60 minutes for flagged items. If extra questions appear, the first pass runs near 132 minutes and review shrinks to about 48.
One prep guide advises against letting a single five-minute question block several one-minute questions. Flag it and move on.
Format, Delivery, and Fees
You have several ways to sit for the exam. IASSC says it is delivered in more than 8,000 testing centers across 165 countries, through PeopleCert online proctoring, and by hundreds of accredited providers. IASSC’s on-demand page describes secure online delivery available at any time, with scheduling possible within about an hour.
The exam fees differ by belt. IASSC’s on-demand page lists Yellow Belt at 60 questions in 2 hours for $250, Green Belt at 100 questions in 3 hours for $350, and Black Belt at 150 questions in 4 hours for $450.
| Belt | Questions | Time | Fee (IASSC on-demand page) |
| Yellow Belt | 60 | 2 hours | $250 |
| Green Belt | 100 | 3 hours | $350 |
| Black Belt | 150 | 4 hours | $450 |
One third-party comparison lists the Black Belt fee at $400, so confirm current fees on IASSC’s site. The same comparison says a retake requires a new voucher purchase. Check the retake policy before you pay.
Prerequisites: What You Need Before You Book
IASSC lists no prerequisites for the Green Belt exam. Training from a qualified source is recommended but not required, and real-world project experience is also recommended but not required.
IASSC also offers an informal, non-proctored Green Belt Evaluation Exam that can help you judge your readiness. Take it before you buy a proctored voucher.
Remember what the exam proves. It shows knowledge of the method. It does not show that you led a project. Many providers, including SSDSI, require a certification project for their own certificate, and the IASSC exam does not. That is why a resume needs both a credential line and a project result.
Illustrative Example: Reading a Mock Exam Score
This example uses made-up numbers. Priya takes a timed 100-question mock with 20 questions per phase.
| Section | Correct out of 20 | Percent |
| Define | 18 | 90% |
| Measure | 15 | 75% |
| Analyze | 12 | 60% |
| Improve | 14 | 70% |
| Control | 17 | 85% |
| Total | 76 out of 100 | 76% |
Priya passes the mock, but only by six questions. Analyze is her weak spot at 60%. A bad day could drop her under 70.
The plan is clear. She reviews Analyze topics, retakes that section, and aims for 80% or better on a full mock before she books. One prep site suggests scoring 80% or higher consistently before scheduling. That is a rule of thumb, not an IASSC rule.
A Four-Week Study Plan (Template)
This template assumes you already finished a course. Adjust the weeks to your schedule.
| Week | Focus | Practice |
| 1 | Define and Measure | 40 questions, untimed, review every miss |
| 2 | Analyze | 20 to 30 questions, redo statistics you missed |
| 3 | Improve and Control | 40 questions, mix in earlier topics |
| 4 | Full simulation | Two timed 100-question mocks, then review |
Study your misses, not your hits. A miss shows a gap. A hit often shows what you already know.
Exam-Day Tactics
- Read the full question first. Rushed readers miss words like “not” and “except.”
- Eliminate wrong answers. Cut two options, then choose between the rest.
- Flag and move on. Return to hard items after your first pass.
- Watch the checkpoints. Use the table above to stay on pace.
- Treat every item as scored. You cannot rely on guessing which ones are not.
- Check the exam rules in advance. IASSC sets limits on notes and tools, so confirm calculator and reference material rules on its site.
How This Exam Compares With Others
The Yellow and Black Belt exams follow the same pattern with different sizes. Use the table above for the numbers.
The ASQ Green Belt exam is a different design. A third-party comparison reports that ASQ’s Green Belt exam has 110 multiple-choice questions in just over four hours, is open book, and requires documentation of work experience. Verify those details with ASQ, since this source is not ASQ itself.
IASSC also lists a recertification exam. One third-party guide reports that it has 50 questions in 90 minutes with a 70% pass mark. Confirm this with IASSC before you plan around it.
Common Mistakes
Thinking the exam has exactly 100 questions. Some forms add up to 10 non-graded items.
Studying one section too long. The split is even, so balance your time.
Skipping timed practice. Knowing the content differs from finishing 100 questions in three hours.
Ignoring statistics. Analyze trips many candidates, and it carries the same weight as the others.
Booking too early. A mock score near 70% leaves no safety margin.
Treating the exam as proof of project skill. It tests knowledge only.
Frequently Asked Questions (FAQs)
How many questions are on the IASSC Green Belt exam?
The exam has 100 graded questions. IASSC says some forms may add up to 10 non-graded questions, so you may see up to 110.
How long is the IASSC Green Belt exam?
IASSC lists a 3-hour allotted time. That equals 180 minutes, or about 1.8 minutes per graded question.
What score do I need to pass?
You need a minimum score of 70%. On 100 graded questions, that means 70 correct answers.
Is the IASSC Green Belt exam open book?
No. IASSC describes it as closed book and proctored. Check IASSC’s current rules for any allowed calculator or reference material.
What types of questions are on the exam?
The questions are multiple choice and true/false. About 20 come from each major section of the Green Belt Body of Knowledge.
How much does the IASSC Green Belt exam cost?
IASSC’s on-demand page lists $350. Fees can change, so confirm the price on IASSC’s website or with your training provider.
Are there prerequisites for the exam?
IASSC lists none. Training and real-world project experience are recommended but not required.
Can I take the exam online?
Yes. IASSC lists online proctored delivery and on-demand testing, along with Pearson VUE testing centers in many countries.
Does the exam include a project?
No. The IASSC exam tests knowledge only. Some providers require a project for their own certificate.
What happens if I fail?
One third-party comparison says a retake requires a new voucher purchase. Confirm the current retake policy with IASSC or your provider before you book.
Final Words
The IASSC Green Belt exam has 100 graded questions, a 3-hour limit, and a 70% pass mark. Some forms add up to 10 non-graded questions, so plan for every item to count. The even split of about 20 questions per DMAIC section rewards balanced study, and the pacing math gives you about 1.8 minutes per question.
Take the free evaluation exam first, run timed mocks, and book only when your scores clear 80% with room to spare. Then pair the exam credential with a finished project to show you can apply what you know.
Prepare for the Exam and Finish a Project With SSDSI
The exam proves what you know, and a project proves what you can do. SSDSI is an IASSC Accredited Training Organization that delivers Green Belt and Black Belt training through onsite, live virtual, public, and self-paced formats, with Master Black Belt mentorship until your certification project is complete. It also offers the IASSC Green Belt exam voucher on its site.
SSDSI has certified 5,322+ professionals across 600+ organizations in 52 cities, backed by a 5-star Google review rating. If you want a plan for both the exam and the project, a conversation about the right format is a solid next step.
About Six Sigma Development Solutions, Inc.
Six Sigma Development Solutions, Inc. offers onsite, public, and virtual Lean Six Sigma certification training. We are an Accredited Training Organization by the IASSC (International Association of Six Sigma Certification). We offer Lean Six Sigma Green Belt, Black Belt, and Yellow Belt, as well as LEAN certifications.
Book a Call and Let us know how we can help meet your training needs.
