Trainee Driving Instructor: What Is a PDI and How Does It Work?
9th September 2026
In this guide, we’ll explain what a PDI is, who can apply for a trainee licence, the 40-hour training requirement, how much the licence costs, what happens while you’re teaching and how the experience can help you prepare for becoming a fully qualified ADI.
What Is a PDI Driving Instructor?
PDI stands for Potential Driving Instructor.
It’s commonly used to describe somebody who is training to become an Approved Driving Instructor and is not yet a fully qualified ADI.
Once you’ve reached the appropriate stage of the qualification process, you can apply to the DVSA for a trainee driving instructor licence.
This gives you an opportunity to gain real experience teaching pupils before taking your final Part 3 test.
It’s important to understand the difference between being a trainee and being fully qualified.
A PDI is still completing the qualification process. An ADI – Approved Driving Instructor – has passed all three qualifying tests and joined the DVSA’s register of approved driving instructors.
Watch: What Is a Trainee Licence?
Want a quick explanation of how the trainee licence works?
Watch our PNG Instructor Training video to learn more about the trainee licence and where it fits into your journey towards becoming a qualified driving instructor.
Where Does the PDI Trainee Licence Fit Into the ADI Qualification?
The trainee licence sits between ADI Part 2 and ADI Part 3.
Your journey can look like this:
- Pass ADI Part 1 – theory and hazard perception
- Pass ADI Part 2 – driving ability
- Complete the required instructional training
- Apply for an optional six-month trainee licence
- Gain experience teaching pupils
- Prepare for and take ADI Part 3
- Pass Part 3 and apply to join the ADI register
The trainee licence is optional. You do not have to become a PDI to qualify as an ADI.
Its purpose is to give you additional experience delivering real driving lessons while you’re developing the instructional skills needed for Part 3.
If you’re working through the qualification now, read our ADI Part 2 Test guide and ADI Part 3 Test guide for detailed explanations of both stages.
Who Can Apply for a Trainee Driving Instructor Licence?
You can’t apply for a trainee licence at the beginning of your instructor training.
Under the current DVSA rules, you need to:
- have passed ADI Part 1 within the last two years
- have passed ADI Part 2
- have completed at least 40 hours of training in providing driving instruction with a qualified ADI
- have completed at least 10 of those training hours in a car
- be eligible to take the ADI Part 3 test
Your instructional training needs to be properly recorded before you apply.
Meeting these requirements doesn’t make you a qualified ADI. It means you’ve reached the point where you may be eligible to gain teaching experience using the trainee licence.
What Is the PDI 40-Hour Training Requirement?
One of the most important requirements for your first trainee licence is completing at least 40 hours of training in providing driving instruction.
This training must be provided by a qualified ADI.
At least 10 hours must take place in a car.
The purpose is to make sure you’ve developed a foundation in teaching before you begin giving paid lessons to pupils under the trainee licence.
Your training is recorded using the relevant DVSA instructor training declaration.
This is often associated with the ADI 21T form – a term you may see when researching the trainee licence online.
The training shouldn’t simply be treated as paperwork you need to complete before applying. It’s an important part of developing the lesson planning, risk management and teaching skills you’ll eventually need to demonstrate during Part 3.
Watch: What Is a Trainee Licence?
Want a quick explanation of how the trainee licence works?
Watch our PNG Instructor Training video covering the trainee licence and where it fits into your journey towards becoming a driving instructor.
What Is the Pink Driving Instructor Badge?
You’ll often hear people refer to PDIs as pink badge driving instructors.
That’s because a trainee instructor licence is displayed using a pink triangular badge.
This distinguishes a trainee instructor from a fully qualified ADI, whose certificate is commonly known as the green badge.
The distinction matters because pupils should be able to recognise that they’re receiving lessons from somebody who is still completing their instructor qualification.
Being a trainee doesn’t mean you’re simply practising without preparation. Before becoming eligible for the licence, you’ll already have passed Parts 1 and 2 and completed the required instructional training.
How Much Is a PDI Trainee Licence?
The current DVSA fee for a trainee driving instructor licence is £140.
This is separate from your instructor training costs and the fees for the three ADI qualifying tests.
You’ll need to pay the application fee when applying for the licence.
For a wider breakdown of the financial side of qualifying, read our guide to the cost of becoming a driving instructor.
How Long Does a PDI Trainee Licence Last?
A trainee driving instructor licence lasts for six months.
This gives you a defined period in which to gain experience teaching pupils and continue developing towards Part 3.
It’s therefore worth thinking carefully about when you apply.
The goal isn’t simply to get the pink badge as quickly as possible. Ideally, you want to be in a position where you can use the six-month period effectively for real teaching experience and Part 3 development.
For more information about the overall qualification timeline, read How Long Does It Take to Become a Driving Instructor?.
Can a Trainee Driving Instructor Charge for Lessons?
Yes. A PDI with a valid trainee driving instructor licence can charge pupils for driving lessons.
GOV.UK explains that the trainee licence allows you to charge for lessons to help cover costs such as insurance and vehicle expenses.
This is one of the major benefits of the trainee route.
Rather than only practising instructional skills in training sessions, you can gain experience working with real pupils while continuing towards Part 3.
However, having a trainee licence does not mean you’re a fully qualified ADI.
You must continue to follow the conditions attached to the licence and work towards completing your qualification.
How Much Does a PDI Earn?
There isn’t one fixed PDI salary or guaranteed level of earnings.
The amount you bring in can depend on factors such as:
- how many paid lessons you deliver
- your lesson price
- local pupil demand
- your working hours
- vehicle and insurance costs
- other business expenses
- the arrangements you have with your driving school or training organisation
It’s also important to distinguish between lesson revenue and take-home income.
The money paid by pupils isn’t automatically the amount you personally earn after your costs.
The trainee licence is primarily designed to help you gain experience in preparation for Part 3 rather than guarantee a particular income.
If you’re researching the longer-term financial potential of the career, read our How Much Do Driving Instructors Earn in the UK? guide.
What Training or Supervision Do You Need While You’re a PDI?
When applying for the trainee licence, there are two routes for your continued development.
You must choose one of them.
Option 1: Supervision
You can choose to have your sponsoring ADI supervise 20% of the lessons you give while you’re using your trainee licence.
You’ll need to keep records of your teaching and supervision.
Option 2: Additional Training
Alternatively, you can choose to complete at least 20 additional hours of training while you have your trainee licence.
You should discuss which route is most appropriate with your sponsoring ADI or training organisation before applying.
Importantly, GOV.UK states that once you’ve chosen one of these options, you cannot switch to the other option afterwards.
What Experience Can You Gain as a PDI?
One of the biggest differences between practising instructional techniques and teaching real pupils is unpredictability.
Every learner is different.
During your time as a PDI, you can gain experience in areas such as:
- planning lessons around individual pupils
- explaining driving techniques clearly
- asking effective questions
- managing risk during real lessons
- adapting when a pupil struggles
- giving useful feedback
- helping pupils reflect on their driving
- managing lesson time
- working with pupils at different stages of learning
Those experiences directly relate to the skills assessed during ADI Part 3.
What’s the Difference Between a PDI and an ADI?
The biggest difference is qualification status.
A PDI is still training and has not yet completed the full ADI qualification.
An ADI has passed Parts 1, 2 and 3 and joined the register of Approved Driving Instructors.
A PDI using a valid trainee licence can teach pupils and charge for lessons, but must operate under the rules of the trainee licence.
An ADI is fully qualified and can work as an approved driving instructor once registered.
You can think of the PDI stage as a bridge between learning how to teach and becoming fully qualified to do it professionally.
Is It Okay to Use a Trainee Driving Instructor?
Yes. A trainee instructor with a valid DVSA trainee licence is permitted to provide paid driving lessons.
Before reaching this point, they must already have passed ADI Parts 1 and 2 and completed the required instructional training.
They are still working towards Part 3, so they’re not yet a fully qualified ADI.
For pupils, the pink badge provides a visible indication that the instructor is teaching under a trainee licence.
How Does Being a PDI Help With ADI Part 3?
ADI Part 3 assesses your ability to deliver a client-centred driving lesson.
You’re assessed across 17 competencies covering:
- lesson planning
- risk management
- teaching and learning strategies
Teaching real pupils as a PDI can give you opportunities to develop those skills in genuine lessons rather than only discussing them in training.
You learn how different pupils respond, how quickly situations can change and when your lesson plan needs to adapt.
That doesn’t mean holding a trainee licence automatically makes Part 3 easy.
The quality of your reflection, training and development during those lessons still matters.
Our ADI Part 3 Test: Everything You Need to Know guide explains the test, scoring system and 17 competencies in detail.
What Happens When Your PDI Licence Expires?
Your trainee licence lasts for six months.
Once it expires, you must stop charging for driving lessons unless DVSA has issued you another valid trainee licence or you’ve qualified and registered as an ADI.
You can apply for another trainee licence, but an extension should not be treated as automatic.
GOV.UK says you’re unlikely to receive another licence if you simply want more time to pass Part 3 or if you didn’t follow the rules of your previous trainee licence.
This is another reason to use the six-month period with a clear plan for your training and Part 3 preparation.
How Does Pass N Go Support Trainee Driving Instructors?
The trainee stage sits within the wider Pass N Go Driving Instructor Training programme.
Our training pathway includes:
- 10 hours of ADI Part 1 training
- 10 hours of ADI Part 2 training
- 40 hours of ADI Part 3 training
- Part 1 learning sessions
- Part 3 workshops
- Part 2 Investment Matching
- Part 3 Rescue Training
- PECODO online learning
The aim is to give you a structured route through the qualification rather than treating Parts 1, 2, 3 and the trainee stage as completely separate steps.
You can explore the complete journey through our Instructor Training Command Centre.
Trainee Driving Instructor FAQs
What is a PDI driving instructor?
PDI stands for Potential Driving Instructor. It commonly refers to somebody who is training to become an Approved Driving Instructor and may be teaching under a DVSA trainee driving instructor licence.
How much is a PDI trainee licence?
The current DVSA application fee for a trainee driving instructor licence is £140.
How long does a PDI licence last?
A trainee driving instructor licence lasts for six months.
Can a trainee driving instructor charge for lessons?
Yes. If you have a valid trainee licence, you can charge for driving lessons while gaining instructional experience, subject to the rules of the licence.
How much does a PDI earn?
There is no fixed PDI salary. Income can vary depending on lesson prices, the number of paid lessons delivered, local demand and business costs. The trainee licence is designed primarily to provide practical teaching experience while you prepare for Part 3.
How long does it take to get a PDI licence?
Before applying, you need to have passed Parts 1 and 2 and completed at least 40 hours of instructional training with a qualified ADI, including at least 10 hours in a car. The time it takes to reach that stage will therefore vary between trainees.
Do you need 40 hours of training for a PDI licence?
Yes. For your first trainee licence, you need at least 40 hours of training in providing driving instruction with a qualified ADI, with at least 10 hours completed in a car.
Is it okay to use a trainee driving instructor?
Yes. A PDI with a valid trainee licence is legally permitted to provide paid driving lessons. They have already passed ADI Parts 1 and 2 and completed the required instructional training, although they have not yet qualified as an ADI.
What happens after the PDI stage?
The next goal is passing ADI Part 3. Once you’ve passed all three qualifying tests, you can apply to join the ADI register and become a fully qualified driving instructor.
Continue Your Driving Instructor Research
- How to Become a Driving Instructor in the UK
- ADI Part 1 Test: Everything You Need to Know
- ADI Part 2 Test: Everything You Need to Know
- ADI Part 3 Test: Everything You Need to Know
- How Long Does It Take to Become a Driving Instructor?
- How Much Does It Cost to Become a Driving Instructor?
- How Much Do Driving Instructors Earn in the UK?
- Is Becoming a Driving Instructor Worth It?
- Instructor Training Command Centre
Ready to Start Your Driving Instructor Journey?
The PDI stage can give you valuable experience working with real pupils while you continue developing towards ADI Part 3.
With Pass N Go, you’ll follow a structured training pathway through the theory, driving ability and instructional stages of becoming a driving instructor.
Explore our Driving Instructor Training programme to see what’s included and take the next step towards qualification.