How to Pass the Prison Officer Scenario-Based Test (SBT)

The prison officer Scenario-Based Test (SBT) is not designed to trick you. Most people who fail it do so for a handful of predictable reasons. They choose answers that sound tough rather than effective, they rush the maths, or they sit it with no practice at all. This guide sets out a practical strategy for both halves of the test and a simple practice plan you can follow in the fortnight before you sit it.

A quick reminder of the format

HMPPS says the SBT takes around 25 to 40 minutes and contains behavioural and numerical scenarios. When it was introduced in 2019, the HMPPS jobs blog described a 16-question situational judgement test in up to 20 minutes and a 20-question numerical test in up to 15 minutes. That is the best published guide to the split, but formats can change, so check your invitation.

HMPPS also gives you a free practice test before the real one. Do it early, not the night before, so you have time to work on whatever it shows up.

Why your score can matter even after you pass

HMPPS fills some posts as pass vacancies, where you go to the next available post, and some as merit vacancies, where posts go in order of assessment performance. Results are valid for 12 months. HMPPS does not publish pass marks, and how much each stage feeds into the final ranking is not published either. Still, the principle is clear: on a merit vacancy, doing well matters, not just scraping through. Treat the SBT as something to do well, not just survive.

The judgement questions: how to think about most and least effective

In a most/least format you usually pick the best and worst of four responses. Two habits make this much easier.

Habit 1: Find the worst answer first

The least effective answer is often the easiest to spot. Look for the option that:

• puts someone at risk, whether a prisoner, a colleague or you;
• ignores a sign that someone is vulnerable;
• breaks a basic rule of fairness, such as favouritism or sharing someone's private business;
• walks away from a problem that is clearly yours to deal with;
• makes a promise you cannot keep.

Once you have ruled that out, you are choosing the best of three.

Habit 2: Use the four behaviours as a checklist

HMPPS assesses later stages against four behaviours. They make a good lens for the SBT too:

• Communicating and Influencing: does the answer involve listening, explaining and calming things with words?
• Managing a Quality Service: does it follow through, keep records, pass information on and keep the regime running?
• Making Effective Decisions: does it check the facts and weigh the risks before acting?
• Caring: does it treat the person with dignity and pay attention to their welfare?

The most effective option usually hits two or three of these at once. A response that is caring but unsafe, or safe but cold and unhelpful, is rarely the best.

The common traps

Trap 1: Passing the buck

"Tell him to put in an application and walk off" can be technically correct and still be a poor answer. If you can deal with something, or at least start dealing with it, that usually beats handing it on with no explanation. Referring things on is fine when it is genuinely someone else's decision, such as healthcare or a manager. The best answers explain the referral to the prisoner and follow it up.

Trap 2: Over-escalating

Many candidates think a firm, rule-quoting answer sounds professional. In prison work, the first tool is usually your voice. Pressing an alarm, threatening a report or calling for lots of staff over a verbal complaint tends to score worse than calm de-escalation. The exception is when there is a real and immediate risk to safety. Then getting help quickly is right.

Trap 3: Under-reacting to risk

The opposite trap is just as common. Any hint that someone may harm themselves or others, or that someone is being bullied or exploited, needs action and must be shared with colleagues. "Keep an eye on it" on its own is rarely enough.

Trap 4: Promising things

Saying "I'll sort your visit out" or "you'll definitely get that tonight" feels supportive. But if you cannot guarantee it, it damages trust. Better answers explain what you will do and when you will come back.

Trap 5: Doing it alone when you should not

Some answers have you dealing with a risky situation single-handed, or breaking a procedure to be helpful. Effective officers work as a team.

Time management

With roughly 20 minutes for 16 judgement items, as described in 2019, you have just over a minute per scenario. In practice:

• Read the scenario once, carefully, and note what the real problem is.
• Read all four options before you choose. The first decent-looking answer is not always the best.
• Eliminate the worst one, then compare the rest.
• Do not sit on one question for three minutes. Make your best judgement and move on.

For the numeracy section, 20 questions in up to 15 minutes means about 45 seconds each. That is enough time if you are confident with the basics, and tight if you are not.

Numeracy tips

The 2019 blog described the maths as "simple mathematical calculations you often have to complete when at work in a prison". In practice that means:

• Roll counts: adding up where people are and subtracting from a total.
• Money: canteen spends, wages and balances in pounds and pence.
• Time: 24-hour clock, shift lengths, time between events.
• Percentages and fractions: what share of a wing is at work, for example.

Tips that save time:

• Check your invitation for whether a calculator is allowed. Practise both ways.
• Line up pence carefully. £4.05 is not £4.50.
• For times, count up to the next whole hour, then add the rest. From 07:45 to 13:20 is 15 minutes, plus 5 hours, plus 20 minutes, which makes 5 hours 35 minutes.
• For percentages, find 10% first, then build from it. 15% of £40 is £4 + £2 = £6.
• Estimate before you calculate. If your answer is wildly off the estimate, re-check it.

A two-week practice plan

Days 1–2: Take the free HMPPS practice test cold. Note which half felt harder.

Days 3–6: Do ten judgement scenarios a day. For each one, write one sentence on why the best answer is best, in terms of the four behaviours. That habit is what builds speed later.

Days 3–6 (same days): Do 15 minutes of mental arithmetic: money, times and percentages.

Days 7–8: Do one full timed mock in exam conditions, then review every wrong answer.

Days 9–12: Focus on your weaker half. If it is judgement, revisit the traps above. If it is numeracy, drill the topic you keep getting wrong.

Day 13: One more timed mock.

Day 14: Rest. Check your internet connection, your device and your room. Sit the test when you are fresh, not after a night shift.

Our Online Tests pack has five full timed mocks in the reported format, with explanations tied to the four behaviours, if you want more than one practice form.

On the day

• Use a quiet room, a charged device and a reliable connection.
• Keep paper and a pen nearby for working out, if your invitation allows it.
• Read the instructions on screen, even if you think you know the format.
• If something technical goes wrong, contact the recruitment team using the details in your invitation straight away.

Key points

• Find the least effective answer first, then compare the rest using the four behaviours.
• Avoid passing the buck, over-escalating, under-reacting to risk and promising things.
• Budget about a minute per judgement item and about 45 seconds per maths item, based on the 2019 description.
• Merit vacancies are allocated by performance, so aim high rather than just to pass.

prisonofficertest.co.uk is an independent practice site. It is not affiliated with HMPPS, the Ministry of Justice, the Scottish Prison Service, the Northern Ireland Prison Service or any prison operator. Always check your own invitation and the recruiter's current guidance.