CITB Test Pass Mark: What 90% (45 out of 50) Means

The CITB Operatives test pass mark is 90%, which means at least 45 correct answers out of 50 questions. That figure comes from the CITB Operatives page, along with the 45-minute time limit. This article shows how to turn any practice score into a percentage, works through an example, and explains why a practice result is a guide to your preparation and not an official result.

Key takeaways

The official figure

CITB states the Operatives test as 50 questions in 45 minutes with a 90% pass mark. Ninety per cent of 50 is 45, so the pass mark is the same thing as "at least 45 of 50". Both phrasings appear in the search terms people use, such as "45 out of 50 pass" and "90 percent pass mark", and they describe one standard.

Two practical points follow:

• The number of wrong answers you can afford is five. Fifty minus 45 is five.
• The pass mark is high compared with many everyday tests, so a score that feels comfortable in general terms may still be a fail here.

The About the HS&E test page on the CITB site describes the test family as a whole. For anything about scoring that this article does not state, such as how results are delivered or what happens after an unsuccessful attempt, use the CITB pages.

Converting a score to a percentage

On a 50-question sitting the conversion is easy because 50 goes into 100 twice. Multiply your number correct by two.

For practice sets of other lengths, use the general formula: number correct divided by number of questions, multiplied by 100.

• On a 10-question set, 9 correct is 90% and 8 correct is 80%.
• On a 20-question set, 18 correct is 90%.
• On a 25-question set, you need 22.5 to reach 90%, so in practice you need 23 correct to be at or above that line.

That last example shows why short sets need care. With a small number of questions, one answer moves your percentage a long way. A 10-question set is useful for finding weak topics. It tells you much less about readiness than a full 50-question sitting.

Worked example: 38 out of 50

Suppose you complete a timed 50-question practice sitting and score 38 correct.

1. Multiply 38 by two: 38 x 2 = 76.
2. Your score is 76%.
3. The pass mark is 90%, which is 45 correct answers.
4. The gap is 45 minus 38, which is seven questions.

So 76% is well below the benchmark. That is not a reason to give up. It is useful information, because seven questions is a small enough gap to close with targeted work. The next step is to review all twelve wrong answers (50 minus 38 is 12) and ask what caused each one. You need seven of them to turn into correct answers to reach 45, but every one of the twelve is worth reviewing, since each shows a gap or a habit.

For each wrong answer, sort the cause into one of three groups:

• Knowledge gap: you did not know the fact or principle. Revise that topic, and read the reason behind the right answer.
• Misreading: you knew the answer but misread the question or an option. Slow down on key words such as "not", "first" and "most".
• Rushing or guessing: you ran short of time or did not think it through. Practise pacing, as described in CITB mock test timing for 50 questions.

Then redo the weak topics and take another timed sitting later. Track the trend over several sittings, not the result of one.

Why a practice score is not an official result

A practice score can be useful, but it has limits, and it helps to be honest about them.

• Different questions. Practice questions on this site are original. We do not use or reproduce CITB's protected test content, so we cannot know how any one of our sets compares with the real test in difficulty.
• Different conditions. Many people practise at home with a phone nearby, a break in the middle, or the answers one tap away. The real sitting is timed at 45 minutes.
• Different samples. Fifty questions is only a sample of what you might be asked. A good practice set shows the topics you are strong on, not everything you know.
• Different pressure. Nerves affect people differently. A calm 45 at home is not a guarantee of the same on the day.
• No official standing. Only CITB can give an official result. This site is independent and not affiliated with CSCS or CITB.

So treat a practice benchmark as a signal. If you are consistently scoring at or above the equivalent of 90% under realistic timed conditions, across more than one set, that is a good sign. If you are scoring around 76%, you have work to do. Neither tells you what will happen on the day.

Setting a sensible practice target

A target helps you decide when you are ready to book. Here is one approach.

• [ ] Take a full timed sitting of 50 questions with no lookups.
• [ ] Convert the result by multiplying by two, and write it down with the date.
• [ ] Review every wrong answer and note the cause.
• [ ] Revise the weakest topic area using the public Operatives topic labels as a map.
• [ ] Repeat with a different set of questions, so you are not just remembering earlier answers.
• [ ] Aim for scores at or above 90% on several different sets before you treat yourself as ready.
• [ ] Re-check the CITB Operatives page before booking, in case the figures have changed.

Be careful about memorising answers to a small bank of practice questions. If you can recite the answers but cannot explain why they are right, a rephrased question on the day can catch you out. The free practice questions give a reason for every answer for exactly this purpose, so read the reasons, not just the letters. The Operatives test format page shows the official numbers beside what this site offers.

Worked example: tracking three sittings

Here is an invented example of how to follow progress over time. The scores are made up to show the method and do not describe any real learner or test.

All three sittings are below the 90% mark, so none of them would meet it. But the trend is useful: the gap shrank from nine questions to one. The learner who made this table would not stop at "88% is close". They would look at the single wrong answer that separates 44 from 45, and at the other five wrong answers on the third sitting, because 44 correct means six wrong and five is the most that the pass mark allows.

Two cautions apply to a table like this. First, three sittings drawn from the same small bank of questions may show memory of the answers as much as knowledge. Second, improvement on practice questions does not carry over automatically to the official test. The table is a way of seeing where preparation is heading, not a forecast.

Common questions about scores

These are points that learners often raise when they first work out their percentage (general practice).

• "I got 44, is that basically a pass?" On the figures CITB states for the Operatives test, 44 of 50 is 88%, which is below 90%. The mark is at least 45 of 50.
• "Can I round up?" Do not round in your own favour. Work from the number of correct answers: 45 or more.
• "Is a 20-question set at 85% worth worrying about?" Seventeen of 20 is 85%. A short set is a pointer to weak topics, not a verdict, so follow it with a full sitting.
• "Should I aim for exactly 45?" A practice score right on the line leaves no room for a bad day, so many learners aim to be at or above it across several different sets.
• "What if the official figures change?" Check the CITB Operatives page shortly before you book, as this article only repeats what that page states.

For pacing as well as scoring, see CITB mock test timing for 50 questions, and the Operatives test format page for the official numbers.

FAQ

Sources

This article is an independent guide. It is not affiliated with, authorised by, approved by or endorsed by CSCS or CITB, and practice on this site is not an official result.

• CITB: Operatives test
• CITB: About the HS&E test

Independent guide, not affiliated with, authorised by, approved by or endorsed by CSCS or CITB. Last updated 2026-10-08.