Checked 6 November 2026. Rules from the NPPF operating manual (July 2026) and the 2027 candidate handbook (September 2026); exam dates are the 2027 sittings. The College of Policing has tested a new promotion process (SIPP) in some forces, so re-check the NPPF page and the handbook each year, and whenever the College announces a national change.
In England and Wales you become a police inspector by promotion from sergeant, through the National Police Promotion Framework (NPPF). It has four steps: show you are competent as a sergeant, pass the inspectors' legal exam, be selected by your force, then spend 12 months as a temporary inspector while you complete a work-based assessment. The College of Policing says promotion "is only attained once an officer has successfully completed all four steps".
This guide takes you through each step, the rules that decide when you can start, and a realistic timeline, with a planner that works out your own earliest dates. It covers England and Wales; Scotland and Northern Ireland are outside this guide, so check your own service's process.
ProSyllabus is an independent study site. It is not part of the College of Policing, the Home Office or any police force. The rules below come from the official sources listed at the end; your force's own promotion policy decides the local details.
College of Policing NPPF operating manual (July 2026) and candidate handbook 2027. Checked 6 Nov 2026.
FreeTests: Crime · Evidence and procedure · General police duties
NPPF Inspectors' Legal Exam Practice Test: free sample
Answer 3 questions against the clock, like the real exam. You then see the right answer, the reason and your time on each. About 4 minutes · free · no sign-in.
3 questions to answer
Start nowabout 5 minThis one is free · no sign-in needed
Your result shows how long each question took you.
The NPPF route to inspector at a glance
| Step | What happens | Who runs it |
|---|---|---|
| Step One: competence in current rank | Your line manager confirms on the Step One eligibility form that you meet the criteria, and you register for the exam through your force examinations officer | Your force |
| Step Two: legal knowledge exam | The inspectors' exam: 150 multiple-choice questions in three hours on crime, evidence and procedure, and general police duties; 65% to pass | College of Policing (national) |
| Step Three: assessment and matching to vacancies | A local selection process against inspector-level competencies, matched to expected vacancies; if no post is free, you wait in a promotion pool | Your force |
| Step Four: temporary promotion and work-based assessment | A mandatory 12 months as a temporary inspector, assessed on qualification units and on your performance in the rank | Your force, with an external awarding body for the units |
| Substantive promotion | Your force must consider you for substantive inspector once you have completed Step Four, taking into account the time-in-rank rule, your PDR, attendance, conduct and your commander's recommendation | Your force |
Promotion is by selection (regulation 4 of the Police (Promotion) Regulations 1996), so passing the exam does not make you an inspector. It keeps you in the process for five years (less one day) while your force selects and posts you.
Before you start: who can go for inspector
On the standard route, only sergeants can take the inspectors' exam, and you must be a substantive sergeant by the date of the exam, not a temporary one. (Constables on the Fast Track programme are the exception; see below.) What that means depends on how you were promoted:
- NPPF-qualified sergeants become substantive after their own Step Four, which the handbook calls "a mandatory 12 months, which cannot be reduced in any circumstances". You can register while you are near the end of it only if your force supports you and you will be substantive by the exam date. If you sit the exam before you are substantive, your result is voided.
- OSPRE parts I and II qualified sergeants are substantive from day one of their sergeant posting, so they can take the inspectors' exam from then on, provided they have not already passed an inspectors' promotion exam.
- Everyone on the standard route needs at least two years as a substantive sergeant before being promoted to substantive inspector. You can sit the exam and move through the steps earlier; the two-year rule applies at the end. (The regulations allow one year's service as a sergeant for an officer on the High Potential Development scheme.)
NPPF step two candidate handbook 2027, "Inspectors' specific eligibility criteria"; Police (Promotion) Regulations 1996, regulation 3(2).
Step One: competence in your current rank
Step One checks that you are ready to enter the process. The handbook says it confirms that you have:
- shown competence in your current rank through your professional development review (PDR), or an acceptable equivalent;
- no live written improvement notice under the Police (Performance) Regulations 2020, and no reduction in rank under those procedures in the previous 12 months;
- no live written warning, final written warning or extended final written warning under the Police (Conduct) Regulations 2020;
- kept to the attendance management policy;
- met the inspectors' specific eligibility criteria above.
NPPF step two candidate handbook 2027, "Eligibility".
In practice, Step One is a form. Your line manager (or equivalent) signs the Step One eligibility form, you return it to your force examinations officer before the registration deadline, and the examinations officer verifies you and allocates you to the exam. Your force may set an earlier deadline than the College's national one, so ask your examinations officer early.
Step Two: the inspectors' legal exam
| Item | Detail |
|---|---|
| Format | One three-hour exam of 150 multiple-choice questions, taken online; 10 questions are removed at marking and you are scored on 140 |
| Subjects | Crime, evidence and procedure, and general police duties, from the 2027 edition of the Blackstone's Police Manuals |
| Pass mark | 65%, which is 91 correct answers out of 140 (the sergeants' exam is 55%) |
| Next sittings | May 2027: Tuesday 11 to Thursday 13 May (registration 15 March to 6pm on 15 April 2027; results by 3 June 2027). November 2027: Tuesday 2 to Thursday 4 November (registration 6 September to 6pm on 4 October 2027; results by 25 November 2027) |
| A pass lasts | Five years (less one day) from the date of the exam. The final stage of Step Three must fall within that period |
| Resits | No national limit; any limit is a local force decision. Resitting while a pass is still valid forfeits the rest of that validity, whatever the result |
In May 2026, 644 of 1,739 candidates passed the inspectors' exam (37.0%), according to the College's results overview. A fail sends you back to Step One with a development plan, and you can try again at a later sitting if your force allows. For the format, syllabus and marking in full, read our NPPF inspectors' exam format, syllabus and dates guide; to see the kind of question asked, try our NPPF inspectors' exam practice questions.
Try three inspectors' exam questions free
These play in our practice player: press Start, answer them, and the result page explains each answer from the legislation or Code of Practice it rests on. They are our own independent practice questions, not College of Policing questions.
FreeTests: Crime · Evidence and procedure · General police duties
NPPF Inspectors' Legal Exam Practice Test: free sample
Answer 3 questions against the clock, like the real exam. You then see the right answer, the reason and your time on each. About 4 minutes · free · no sign-in.
3 questions to answer
Start nowabout 5 minThis one is free · no sign-in needed
Your result shows how long each question took you.
Step Three: local selection and matching to vacancies
Step Three is run by your force, not by the College. The operating manual says it assesses "candidates' potential to perform at the next rank against the relevant behavioural competencies" and matches the number of successful candidates to the number of expected vacancies. Your force's senior management and HR decide the structure and techniques, so the process (for example an application and an interview, or other assessments) varies from force to force. Read your force's promotion policy and the College's professional profile for an inspector before you apply.
Rules that apply in every force
- You need a valid Step Two pass: the date of your Step Three assessment, including the final part, must fall within the five years (less one day) of your pass. If it does not, you return to Step One.
- If you are unsuccessful, you can stay in the NPPF and try the next Step Three process while your pass is still valid, with a development plan in your PDR.
- If you are selected but no vacancy is free, you go into a promotion pool. Forces should aim not to keep anyone in the pool for more than 12 months; in exceptional cases they can extend this by up to 24 months (36 in total), after which you must reapply at Step Three if your pass is still valid.
NPPF operating manual, July 2026, sections 5.4 to 5.10.
Step Four: 12 months as a temporary inspector and the work-based assessment
When a post comes up, you are temporarily promoted to inspector and start the work-based assessment (WBA). The law sets the minimum: the work-based assessment "shall consist of a period of a minimum of 12 months" (Police (Promotion) Regulations 1996, Schedule 1), and you are temporarily promoted when it begins (regulation 6).
What the work-based assessment involves
- You are registered with an external awarding body for the relevant Regulated Qualifications Framework (RQF) units before, or as soon as, you are temporarily promoted. The College describes this as leading to "a professional qualification in police management".
- You are assessed in the workplace against the units and the professional profile for the rank. The units can be finished sooner, but your performance and attendance in the temporary rank are assessed over the full 12 months.
- Your line manager (or another trained person appointed by your force) also assesses your performance in the temporary rank through your PDR over the 12 months.
- Forces should give you opportunities for study or protected learning time; how much is agreed locally.
- In extenuating circumstances, temporary promotion can be extended by up to a further 12 months.
NPPF operating manual, July 2026, sections 6.2 to 6.7.
If at the end you have not met every assessment standard, or your performance or attendance in the rank was not satisfactory, you return to Step Three; any units you completed should still be awarded. If you pass, your force must consider you for substantive promotion, taking into account your length of service as a sergeant (usually two years, under the Promotion Regulations), your overall performance in your PDR, your attendance and conduct records and a recommendation from your BCU or OCU commander or head of department. If it then decides not to promote you, the reasons must be evidence-based, justifiable and documented.
The operating manual also warns that plagiarism at Step Four, "including the use of AI", can lead to misconduct proceedings, so your evidence must be your own work.
How long does it take to become a police inspector?
At least two years from the day you become a substantive sergeant, because of the two-year rule, and usually longer. The exam sittings, your force's Step Three timetable and the wait for a vacancy all add time. Typical stages, in order:
| Stage | How long | Set by |
|---|---|---|
| Become a substantive sergeant | NPPF sergeants: after their own 12-month Step Four as a temporary sergeant | Handbook 2027 |
| Step One form and registration | Registration is open for about a month and closes about four weeks before the exam | College dates; your force may close earlier |
| Step Two exam and results | Results about three weeks after the exam (3 June 2027 for May; 25 November 2027 for November) | Handbook 2027 |
| Step Three selection | Whenever your force runs a process, within your five-year pass | Your force |
| Promotion pool (if no vacancy) | Forces aim for no more than 12 months; up to 36 in exceptional cases | Operating manual 5.8 |
| Step Four as a temporary inspector | 12 months minimum; extendable by up to 12 months in extenuating circumstances | Regulations and operating manual 6.4.1 |
| Substantive inspector | Not before two years as a substantive sergeant | Handbook 2027; regulation 3(2) |
Plan your route: the earliest dates for you
Enter the date you became (or will become) a substantive sergeant, and how many months you expect between your exam result and the start of a temporary inspector posting. That gap is Step Three plus waiting for a vacancy; it is set by your force, not nationally. The planner then applies the national rules. The plan shown first is for a sergeant made substantive on 1 March 2027 with a 10-month gap.
- Step One: ask your line manager to sign the Step One eligibility form before your force's registration deadline.
- Step Two: the May 2027 inspectors' exam, Tuesday 11 to Thursday 13 May 2027. Registration runs from 15 March 2027 to 6pm on 15 April 2027 (your force may close earlier). Results by 3 June 2027.
- Step Three: your force's selection process and a vacancy. On your assumption of 10 months, temporary promotion to inspector starts about 3 April 2028.
- Step Four: 12 months as a temporary inspector with the work-based assessment, to about 2 April 2029.
- Two years as a substantive sergeant: 1 March 2029.
- Earliest date your force can consider you for substantive inspector: 3 April 2029 (the end of Step Four is the later date).
Rules used: you must be a substantive sergeant by the day you sit the exam, so the planner allows up to the last day of a sitting (College handbook 2027); Step Four is a mandatory 12 months of temporary promotion (operating manual, July 2026); substantive promotion to inspector needs at least two years as a substantive sergeant (handbook 2027; Police (Promotion) Regulations 1996, regulation 3(2)). The planner picks the first published sitting whose registration has not closed. It assumes you pass at the first attempt and your force supports your application; it is a guide, not a promise of promotion.
Two worked timelines
Example 1: the fastest route for a new substantive sergeant
- Made a substantive sergeant on 1 March 2027 (after a 12-month temporary posting under the NPPF).
- Step One form signed and registered for the May 2027 inspectors' exam (registration 15 March to 15 April 2027). Sits it on 11 May 2027 and passes; results by 3 June 2027.
- Selected at the force's Step Three process early in 2028 and posted as a temporary inspector on 1 April 2028.
- Step Four runs to 31 March 2029. The two-year rule was met on 1 March 2029, so the end of Step Four is the later date.
- Earliest substantive promotion: from 1 April 2029, about two years and one month after becoming a substantive sergeant.
Our illustration of the rules in the 2027 handbook and the July 2026 operating manual; the Step Three date is an assumption.
Example 2: selected, then a year in the promotion pool
- Substantive sergeant since 2024; sits the November 2027 inspectors' exam and passes; results by 25 November 2027. The pass is valid for five years (less one day) from the exam.
- Selected at Step Three in February 2028, but the force has no inspector vacancy, so the sergeant goes into the promotion pool.
- A post comes up and the sergeant is temporarily promoted on 1 February 2029, within the 12 months forces aim for.
- Step Four runs to 31 January 2030; the two-year rule was met long before. Earliest substantive promotion: February 2030, over two years after the exam.
Our illustration; pool times and Step Three dates vary by force.
FreeTests: Crime · Evidence and procedure · General police duties
NPPF Inspectors' Legal Exam Practice Test: free sample
Answer 3 questions against the clock, like the real exam. You then see the right answer, the reason and your time on each. About 4 minutes · free · no sign-in.
3 questions to answer
Start nowabout 5 minThis one is free · no sign-in needed
Your result shows how long each question took you.
Other routes: Fast Track, Direct Entry and the SIPP trial
Fast Track Constable to Inspector (FTCI)
The College's Fast Track programme is for serving constables and aims to take them to inspector within two years. Fast Track officers still go through every NPPF step except Step Three: they sit the inspectors' exam while still constables. To remain on the programme they must reach 65%; officers scoring from 55% to below 65% may remain with their chief officer's approval and get a retake in year two. They then do a 12-month work-based assessment as a temporary sergeant and then another as a temporary inspector. Places are by force nomination and a national assessment centre, and the window now opens every second year: the College expects the next one, for cohort 13, in May 2028. See the College's FTCI page.
Direct Entry inspector
Direct Entry let people from outside policing join at the rank of inspector. The College says its Direct Entry inspector and superintendent programmes "are currently paused", and that it will re-engage with forces on their future delivery, "likely to be in the next two to three years". Check with the College or the force whether a programme is actually recruiting before you plan around it.
SIPP: the new process tested in some forces
The College has tested a new Sergeant and Inspector Promotion and Progression (SIPP) process, with three stages (development, selection and promotion) and a legal knowledge exam with questions specific to the role. The test phase it announced in May 2024 ran from April 2024 to March 2026. The College's licence page for the SIPP (stage 2) selection process lists five forces as currently licensed to deliver it: Avon and Somerset, Leicestershire, Lincolnshire, Northamptonshire and Northumbria, and its step two page still refers to forces "trialling the SIPP legal test". The College said in May 2024 that forces not taking part would keep using the NPPF and that no decision had been made about the future process; in October 2023 it said any national change was not likely before at least 2027. If you serve in one of those forces, ask your examinations officer which process applies to you.
Is it worth it?
That depends on the role you want as much as the money. For the pay points, an estimate of take-home pay at each rank and how overtime changes the comparison, see our police sergeant salary guide, which compares sergeant and inspector pay.
Common mistakes
- Registering for the inspectors' exam as a temporary sergeant. You must be substantive by the exam date, or your result is voided.
- Treating the exam as the promotion. It is Step Two of four; selection, a vacancy and 12 months of assessed temporary promotion follow.
- Letting a pass run out. If you have not completed your Step Three assessment within five years (less one day) of the exam, you go back to Step One.
- Resitting to "top up" a pass. Sitting again forfeits the rest of your existing validity, even if you fail the resit.
- Forgetting the local deadline. Your force may close registration earlier than the College's date.
- Planning around Direct Entry. The College's inspector programme is paused.
Step Two is the part you can prepare for now
Steps One, Three and Four depend on your record, your force and the job. Step Two is a national exam: 150 multiple-choice questions in three hours, 65% to pass. Our NPPF Inspectors' Legal Exam Practice Test has two timed mocks in that format, marked against the 65% pass mark, with every answer explained from the Act or Code of Practice it rests on.
See the NPPF inspectors' exam practice test. Independent practice; not made or endorsed by the College of Policing.
FreeTests: Crime · Evidence and procedure · General police duties
NPPF Inspectors' Legal Exam Practice Test: free sample
Answer 3 questions against the clock, like the real exam. You then see the right answer, the reason and your time on each. About 4 minutes · free · no sign-in.
3 questions to answer
Start nowabout 5 minThis one is free · no sign-in needed
Your result shows how long each question took you.
Frequently asked questions
How do you become a police inspector in the UK?
In England and Wales, by promotion from sergeant through the NPPF: Step One (competence in your current rank), Step Two (the inspectors' legal exam, 65% to pass), Step Three (your force's selection process and a vacancy) and Step Four (12 months as a temporary inspector with a work-based assessment). You also need at least two years as a substantive sergeant before you can be made a substantive inspector.
How long does it take to become a police inspector?
At least two years after you become a substantive sergeant, and usually longer, because Step Three depends on your force's selection rounds and vacancies and Step Four lasts a minimum of 12 months.
Can a constable sit the inspectors' exam?
Not on the standard route: only substantive sergeants can. Constables on the College's Fast Track Constable to Inspector programme are the exception; they sit the inspectors' exam while still constables.
Can I take the inspectors' exam as a temporary sergeant?
No. You must be a substantive sergeant by the date of the exam. NPPF sergeants near the end of their 12-month Step Four may register only if their force supports it and they will be substantive by the exam date; anyone who sits it before becoming substantive has the result voided.
What is the NPPF work-based assessment?
Step Four: at least 12 months as a temporary inspector, assessed in the workplace against Regulated Qualifications Framework units for the rank and on your performance and attendance, recorded in your PDR. The College says it leads to a professional qualification in police management.
What happens if I fail Step Four?
You return to Step Three, and any units you completed should still be awarded. Your line manager should meet you to discuss the shortfall and agree how to improve.
How long is an inspectors' exam pass valid?
Five years (less one day) from the date you sat it. The final stage of your force's Step Three process must fall within that period, or you go back to Step One.
When is the next police inspector exam?
Tuesday 11 to Thursday 13 May 2027 (registration 15 March to 6pm on 15 April 2027), then Tuesday 2 to Thursday 4 November 2027 (registration 6 September to 6pm on 4 October 2027).
Can you join the police as an inspector?
Not at present through the College's national programme: it says the Direct Entry inspector and superintendent programmes are currently paused.
Does this apply to Police Scotland?
No. The NPPF and the Police (Promotion) Regulations 1996 described here apply in England and Wales. Check Police Scotland's or the PSNI's own promotion process.
Sources
- official — College of Policing: "National police promotion framework (NPPF)" page (read 6 Nov 2026): the four steps
- official — College of Policing: NPPF operating manual, July 2026 (PDF): Step One eligibility, Step Three selection and the promotion pool, Step Four temporary promotion and work-based assessment, Fast Track and Direct Entry
- official — College of Policing: NPPF step two legal examinations candidate handbook 2027 (PDF, September 2026): eligibility, dates, registration, structure, pass mark, results, validity
- official — College of Policing: "Sergeants' and inspectors' NPPF step two legal exams" page (read 6 Nov 2026): 2026 and 2027 registration and exam dates; SIPP legal test
- official — College of Policing: NPPF inspectors' step-two legal examination, May 2026, results and analysis overview (PDF)
- official — legislation.gov.uk: The Police (Promotion) Regulations 1996 (SI 1996/1685), revised text: regulations 3, 4 and 6 and Schedule 1 (England and Wales)
- official — College of Policing: Fast Track Constable to Inspector (FTCI) programme page (read 6 Nov 2026)
- official — College of Policing: "Direct entry into the police" page (read 6 Nov 2026): inspector and superintendent programmes paused
- official — College of Policing: "Testing new process for promotion and progression for sergeants and inspectors" (23 May 2024) and the SIPP (stage 2) selection process licence page (forces licensed, read 6 Nov 2026)
- official — College of Policing: "Promotion and progression for sergeants and inspectors" (27 October 2023)
official = a document published by the conducting body. reported = a news or coaching site we could not check against an original. Where sources disagree this page says so rather than picking one.
