The AWS Certified Welding Inspector exam, explained end to end

The AWS Certified Welding Inspector, or CWI, is a credential from the American Welding Society (AWS) that many welders and quality-assurance technicians pursue because it can meaningfully raise their pay and open inspection roles. It is also expensive and multi-part, and the sites that rank for it are mostly selling a seminar. This guide walks the exam end to end so you can decide what you actually need, from someone who sells you nothing.

Who can sit the exam

Eligibility is a combination of education and documented welding-related work experience. The exact combination depends on your highest level of education: more schooling reduces the years of experience required, and less schooling increases it. Someone with a four-year engineering degree needs the least experience, a two-year technical degree needs more, a high-school diploma more still, and there is a path for candidates without a diploma that requires the most documented time in the trade.

You certify your experience on the application, and your work has to be in a welding-related occupation as AWS defines it, not any job in a shop that happens to weld. The American Welding Society is the authority on the current eligibility table, so confirm your specific case against the official application before you pay anything. A common and avoidable mistake is booking the exam and then discovering your documented experience does not add up the way you assumed.

There is also a lower rung, the Certified Associate Welding Inspector (CAWI), for people who pass the same exam parts but do not yet meet the full experience requirement. If you are early in the trade, read the credential ladder guide before you apply, because it changes which credential you should register for.

The three parts

The exam is split into three parts, and you must pass all of them.

• Part A, Fundamentals. A closed-book test of welding fundamentals: welding processes, basic metallurgy, weld symbols, discontinuities, destructive and nondestructive testing methods, mechanical properties, and general inspection concepts. You bring no references to this part, so it rewards genuine recall. For most candidates this is the part that needs the most study, because it is the one you cannot look up your way through.
• Part B, Practical. A hands-on part. You inspect molded plastic weld replicas using real inspection gauges, working against a supplied document called the Book of Specifications. You are the inspector, not the welder: Part B tests your inspection judgment and your ability to apply an acceptance criterion, not your ability to lay a bead. First-timers are often surprised by what the kit actually is and how the timing works, which is why we cover it in detail in the Part B practical walkthrough.
• Part C, Code Application. An open-book test where you apply one specific welding code, the code you registered for, to inspection scenarios. Because it is open book, the skill is fast, confident navigation of the code book, not memorization. Which code book you need and which edition it is pinned to is its own decision, covered in the code book and edition guide.

How scoring works

Each part is scored independently and you must meet the passing threshold on each one. A strong score on Part A does not carry a weak Part C; there is no averaging across parts. Confirm the current passing thresholds on the official inspector pages, because these are facts that can change between exam-body updates and that we keep dated on this site rather than repeat from memory.

The sequencing rule catches people out: you must attempt all three parts before you may retake any part you failed. You cannot pass Part A, walk out, and re-sit Part C in isolation on a later date without having attempted the others. This is why the retake math matters before you book, and it is covered in full in the retake guide.

How hard is it, honestly

The course-sellers have an incentive to make the exam sound harder than it is, because fear sells the seminar. The neutral read is that it is a demanding, wide exam that a prepared candidate passes and an underprepared one does not, and that the parts fail people for different reasons. Part A fails people on breadth of fundamentals; Part C fails people on code-navigation speed under the clock; Part B fails people who have never handled the replica format before exam day. The honest difficulty breakdown, part by part, is in the how hard is the CWI exam guide.

A realistic study plan

For most candidates the honest plan is:

1. Decide your prep path first, because it drives the cost more than anything else. Use the cost calculator to see the seminar-versus-self-study difference as a single number, then read the neutral seminar-vs-self-study breakdown.
2. Drill Part A fundamentals, since it is closed book and pure recall. This is where a structured course or a good self-study text earns its keep, and where the free diagnostic practice test shows you which fundamentals topics are weakest.
3. Practice Part C as a navigation skill against your chosen code book. Speed comes from repetition, from learning the code’s table of contents and index cold, not from reading the code cover to cover.
4. Get hands-on with the Part B format before exam day so the replicas, the gauges, and the Book of Specifications are not a surprise. This is the cheapest large gain available, because Part B failures are so often format-shock rather than lack of ability.

Give yourself a real runway. Candidates who cram tend to fail Part A on breadth; candidates who spread the study over a couple of months tend to pass. The exam is not a memory trick, it is a body of knowledge plus two applied skills.

What this exam costs

The base examination is 1,255 US dollars for American Welding Society members and 1,520 US dollars for non-members, where the non-member price includes a three-year membership. On top of that you may pay a 125-dollar application fee if your application is handled by AWS headquarters, a 60-dollar-per-part seat fee at a Prometric test center, an Authorized Training Facility fee for Part B that the facility sets rather than AWS, and, if you choose it, the cost of a seminar or pre-seminar course. Every figure here was checked against the official AWS price list on 2026-07-22; confirm the current numbers before you pay, since the price list resets each January. The full itemized, dated breakdown is on the cost table, and you can price your own situation with the cost calculator.

After you pass

The certification is valid for nine years, with renewal applications required at year three and year six and a full recertification at year nine. The recertification guide and the recert calculator cover the four routes and which is cheapest for you. If you inspect a specific kind of work, a code endorsement added to your CWI can both open jobs and, taken at the right time, double as your recertification: see the endorsement matrix.

Sources: the AWS Certification and Education Price List and the AWS inspector certification pages at aws.org (reviewed 2026-07-22). Exam structure, eligibility categories, scoring, and fees are set by the American Welding Society and can change between updates; confirm the current details on the official application before you pay. This site is independent, is not affiliated with AWS, and sells no seminar, course, or exam seat.