Thinking of a Teaching Career? Here’s Why the 12‑Week Rule Matters…
Short answer: once you’ve worked in the same role, at the same school, for 12 qualifying weeks, the Agency Workers Regulations entitle you to the same basic pay and conditions as a teacher employed directly by that school for the same job. Below, we cover exactly how that works, plus what it takes to become a supply teacher, what supply pay actually looks like, and where to find placements.
Quick reference: the 12-week rule
| Question | Answer |
|---|---|
| Where does the rule come from? | The Agency Workers Regulations 2010, adapted specifically for supply teachers in 2014 |
| What do you get from day one? | Access to the same facilities as directly-employed staff (staffroom, canteen, car park) and information on internal vacancies |
| What do you get after 12 weeks? | The same basic pay and conditions as a directly-employed teacher doing the same job, based on the school’s pay policy |
| Do the 12 weeks need to be consecutive? | No. Even one hour worked in a given week counts that week toward the total |
| Do school holidays reset the count? | No, they pause it rather than resetting it, as long as you’re expected to return to the same role |
| What isn’t covered by the 12-week rule? | Occupational sick pay, maternity/paternity/adoption pay, redundancy pay, notice pay, pension, and paid time off for trade union duties |
| What if it’s not honoured? | Raise it with your agency or school, involve your union, or in unresolved cases bring an Employment Tribunal claim against the agency or the school |
How to become a supply teacher
The requirements to become a supply teacher are very similar to becoming a full-time teacher in a primary or secondary school. If you’re already a qualified teacher, moving into a supply role is straightforward.
If you’re not yet qualified and considering a career change, you’ll need a 2:2 degree or above and Qualified Teacher Status (QTS) through Initial Teacher Training (ITT). BEd, BA/BSc, and PGCE with QTS are the recognised routes.
If you’re aiming to teach at secondary level, you’ll also need a degree in the subject you plan to teach. Even with a relevant degree, you may still need to complete a Subject Knowledge Enhancement (SKE) course before starting your initial teacher training.
What is supply teacher pay?
Supply staff are usually supplied by agencies rather than employed directly by the school, academy, or local authority. Because of this, they’re not covered by the School Teachers’ Pay and Conditions Document (STPCD), and pay is set by the agency instead, which is typically lower than direct employment.
NEU’s 2021 supply member survey found that more than half of supply teachers were paid less than £125 a day, and only seven percent were paid over £150 a day. At an average daily rate of £100 across a year, that works out to over £6,000 less than a newly qualified full-time teacher would earn.
The trade-off is flexibility: supply work allows for more control over your hours, including part-time arrangements that aren’t always available in permanent roles. And, as covered above, once you hit 12 weeks in the same role, the pay gap narrows considerably.
Where to find supply teacher jobs
The easiest route into supply teaching is through an agency. Schools and academies typically go straight to agencies when they need cover, so while it isn’t strictly necessary to join one, it makes securing work far more convenient.
It’s worth doing your research before committing to an agency. Recommendations from others in the industry are the most reliable source, and if you don’t have local contacts, the Tes forum is a good place to ask.
What rights does a supply teacher have?
If you’re employed directly by a school or academy in a supply role, you get the same rights as any other employee, including:
- Teachers’ Pension Scheme (TPS) membership
- Redundancy payments after two years of continuous service
- Pay in line with the School Teachers’ Pay and Conditions Document
- Unfair dismissal protection after two years of employment
If you’re hired through an agency instead, none of this applies by default. Your placement can be ended on 24 hours’ notice, and you can’t join the Teachers’ Pension Scheme through the agency. That changes once the 12-week rule takes effect.
How the 12 weeks are counted
The qualifying period is based on time in the same role, at the same school, or with the same hirer if you move between schools within one multi-academy trust. It doesn’t reset for short breaks like half-term or the summer holidays, as long as there’s an understanding you’ll return to the same assignment. Tracking this is technically the agency’s responsibility, but it’s worth keeping your own record of start dates and placements in case of a dispute.
What changes at week 13
From the 13th week, you’re entitled to the same basic pay and conditions as a directly-employed teacher doing your job, based on the school’s own pay policy (which for most maintained schools follows the STPCD). This covers pay, working hours, and annual leave, but it doesn’t extend to benefits tied to permanent employment, such as sick pay, pension contributions, or maternity pay.
Frequently asked questions
Do the 12 weeks have to be worked at the same school?
Generally yes, in the same role at the same school. If you move between schools within the same multi-academy trust or local authority in a similar role, some agencies will count that toward the same qualifying period, but this varies, so it’s worth checking directly with your agency.
Does the 12-week rule apply to teaching assistants as well as teachers?
Yes. The Agency Workers Regulations cover agency workers generally, so supply teaching assistants qualify for the same pay parity rights after 12 weeks in the same role.
What should I do if my agency won’t apply the 12-week rule?
Raise it with your agency directly and ask them to confirm your qualifying weeks in writing. If that doesn’t resolve it, your union can advise on next steps, and organisations like the National Supply Teachers Network support supply staff specifically with AWR claims.
Does a short placement that ends just before 12 weeks reset everything if I come back later?
If you return to the same role at the same school after a genuine gap, it can restart the count, which is why some supply staff have reported placements ending just before the 12-week mark. If you think this has happened to avoid triggering the rule, it’s worth raising with your union.
Can agency supply teachers join the Teachers’ Pension Scheme?
Not through the agency directly. TPS membership is one of the benefits that stays tied to direct employment by a school, and it isn’t picked up by the 12-week rule, which covers basic pay and conditions rather than pension access.
Already found your next placement? Make sure you’re getting everything you’re entitled to outside the classroom too. Join Discounts for Teachers for free to access discounts across shopping, travel, and everyday essentials, whether you’re supply, full-time, or somewhere in between.
