Teacher Overtime & Extra Hours Calculator

Understanding Teacher Working Hours

Teaching is one of the few UK professions where overtime pay simply does not exist. The School Teachers' Pay and Conditions Document (STPCD) defines a maximum of 1,265 directed hours per year across 195 working days. Beyond these, teachers are expected to work "such additional hours as may be needed" with no additional compensation and no upper limit.

A teacher on M3 outside London earns £38,400.00 per year, giving a directed-hours rate of £30.36. However, research shows teachers typically work 49 to 54 hours per week during term time once marking, planning, and reports are included, dramatically reducing their effective hourly rate. This calculator uses the 1,265 figure as a baseline to quantify what your extra hours are worth before and after tax.

What Are Directed Hours?

Directed hours are hours when a headteacher can require you to be available for work. The 1,265-hour limit covers 190 teaching days plus 5 INSET days, averaging around 6.5 hours per working day. Activities that count include classroom teaching, registration, assemblies, break duties, staff meetings, and parents' evenings. A teacher on M1 (£34,069.00) has a directed-hours rate of £26.93/hour, while UPS3 (£52,835.00) reaches £41.77/hour.

Marking, lesson planning beyond PPA time, report writing, creating resources, and responding to emails all fall outside directed hours. Headteachers must allocate directed hours reasonably and publish a directed time budget. If you believe your hours have been exceeded, raise it with your union representative.

The Reality of Teacher Working Hours

The DfE Teacher Workload Survey consistently shows full-time teachers work 49 to 54 hours per week during term time. Over 39 weeks, that equates to 1,911 to 2,106 hours annually -- 51% to 66% more than the 1,265 directed hours. Consider a teacher on M6 earning £46,940.00. Their directed-hours rate is £37.11, but at 50 hours per week (1,950 total), their effective rate drops to £24.07.

The workload burden falls unevenly. NQTs spend more time on planning and resources, while middle leaders average 53 to 56 hours per week and senior leaders frequently exceed 60. Around 40,000 teachers leave the state sector each year, with workload consistently cited as a top reason alongside pay.

Additional Duties and Tutoring

While the STPCD does not provide overtime pay, many schools offer additional payments for voluntary duties. Since the 2003 workforce reform, exam invigilation must be voluntary and typically pays £12 to £20 per hour. After-school clubs pay £20 to £35 per session, and Saturday revision sessions offer £25 to £40 per hour. Residential trips may pay £50 to £100 per night, though many schools offer nothing. Always clarify whether duties fall within or outside your directed hours.

Private tutoring is one of the most lucrative options for supplementing income, with rates varying by location and subject:

GCSE and A-level tutoring in core subjects commands the highest rates. Online platforms like MyTutor and Tutorful charge 15% to 30% commission but handle marketing and payment.

PPA Time and Your Rights

Planning, Preparation, and Assessment (PPA) time is a statutory entitlement: at least 10% of your timetabled teaching time, provided during the school day. Schools cannot direct you to use PPA for meetings, training, or data entry. Common abuses include cancellation for cover duties and scheduling at inconvenient times. If your PPA is regularly disrupted, this breaches the STPCD and should be raised with your headteacher and union. Part-time teachers receive 10% of their actual teaching hours, not 10% of a full timetable.

Tax Implications of Additional Income

All extra earnings are subject to income tax, National Insurance, and potentially pension contributions and student loan repayments at your marginal rate. For most Main Pay Range teachers, this means 20% income tax plus 8% NI. Because pension is deducted before tax is calculated, adding a Teachers' Pension tier of 7.4% to 8.9% for typical MPR salaries brings the total marginal rate to around 34% to 35%, meaning you keep roughly 65p to 66p of every extra pound.

If extra earnings push your total above the £50,270 higher rate threshold (2026/27), income tax rises to 40% plus 2% NI, giving a 42% rate before pension. With pension contributions, the marginal rate can exceed 50%. Student loan Plan 2 repayments add a further 9% above the £29,385 threshold. For a teacher on £35,000 with a Plan 2 loan and 7.4% pension, the total marginal rate is approximately 42.9%. This calculator accounts for all these deductions.

Work-Life Balance and the STPCD

Teaching has some of the highest rates of work-related stress in the UK. The HSE Labour Force Survey and Teacher Wellbeing Index consistently report that over three-quarters of education professionals describe themselves as stressed, with workload as the primary cause. Research by the NFER shows around one-third of teachers who qualified in the last decade have already left. If you are considering extra work, weigh the income benefit against the long-term risk to your health and career longevity.

The STPCD requires headteachers to have regard for work-life balance when allocating duties. Teachers also benefit from "rarely cover" provisions, meaning you should not cover for absent colleagues except in genuinely unforeseeable circumstances. Note that the STPCD applies to maintained schools only -- academies and free schools set their own conditions, though many follow the STPCD as a baseline. Check your contract and consult your union if terms differ.