What happens if you fail the NCSO exam?
If you are unsuccessful on your first attempt you must wait a 3-month deferral before rewriting. Subsequent attempts require a 6-month then a 12-month wait. Each rewrite costs $80 CAD. These terms are set out in ACSA’s NCSO Information Booklet (February 2025).
The deferral schedule
| Attempt | Wait before you may rewrite | Fee |
|---|---|---|
| First attempt | — | $65 |
| Second attempt | 3 months | $80 |
| Third attempt | 6 months | $80 |
| Fourth attempt | 12 months | $80 |
The real cost is time, not money
The $80 rewrite fee is trivial next to a three-month delay. If a role or a promotion depends on the designation, that deferral is the actual penalty. It is a strong argument for taking an extra two weeks of preparation rather than sitting the exam hopefully.
Why most candidates fail, and what to change
The common pattern is not weak knowledge. It is passive study. Candidates read the course material, recognise it, and mistake recognition for recall. Under a two-hour clock, recognition is not enough — you have to produce the answer.
- Switch to retrieval. Cover the options and answer from memory first. If you cannot produce it, you do not know it yet, however familiar it feels.
- Find your weak modules honestly. Failure usually concentrates in the two or three modules you never touch at work — often auditing and legislation.
- Space the review. Revisit missed material after a day, three days, a week.
- Rehearse the clock. Two full timed sittings before the real one.
A three-month deferral is enough time to fix all four properly.
Questions people ask
How long do you wait to rewrite the NCSO exam?
3 months after the first failure, then 6 months, then 12 months.
How much is an NCSO rewrite?
$80 CAD, versus $65 for the initial attempt.
Can you fail the NCSO exam more than once?
Yes, but each attempt carries a longer deferral: 3 months, then 6, then 12.
Last updated 9 August 2026.
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Sources
Exam facts on this page come from the certifying body's own published material. Last verified 9 August 2026.
- ACSA, NCSO Information Booklet (February 2025) — 75% pass mark, up to 2 hours, $65 initial / $80 rewrite, 3-month deferral, 11 compulsory + 2 elective courses, 3 years (6,000 hours) field experience within 10 years.
- Alberta Construction Safety Association — NCSO program
- Canadian Federation of Construction Safety Associations
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