Table of contents

• What is the Teacher Overtime & Additional Hours Calculator?
• How teacher overtime and out-of-hours pay is calculated
• Example Calculation: Sarah’s Weekend Revision Sessions
• STPCD Rules: Understanding Directed Time vs. Voluntary Hours
• Pro-Rata vs. Flat Rates: What to Look For in Your School Policy
• The Ultimate Teacher Additional Hours Tracking Checklist
• How to use the Teacher Overtime Calculator
• Frequently Asked Questions (FAQs)

Use this Teacher Overtime & Additional Hours Calculator to project your gross extra earnings when taking on duties outside of your standard directed hours. In 2026, many educators take on supplementary voluntary work, such as weekend revision sessions, holiday booster classes, or after-school tuition. This tool converts your annual salary into an accurate hourly rate under standard national frameworks to ensure you are compensated fairly for your extra time.

What is the Teacher Overtime & Additional Hours Calculator?

The Teacher Overtime & Additional Hours Calculator is a specialised financial auditing tool designed for UK educators who agree to work beyond their statutory contractual obligations. Standard teaching contracts do not include traditional corporate “overtime” provisions for grading papers or planning lessons in the evenings. However, specific out-of-hours teaching programmes funded by the school do qualify for additional compensation.

As we navigate 2026, understanding how your local school pay policy calculates these extra hours is vital. This tool allows you to evaluate your supplementary income using either the official statutory pro-rata metric or a standard flat casual rate, giving you clear visibility into your gross supplementary paycheck.

How teacher overtime and out-of-hours pay is calculated

The calculator determines your additional gross pay by converting your annual salary into an hourly benchmark and multiplying it by your logged extra hours.

To keep the process transparent, the tool follows these logical steps:

• Determine the Hourly Rate Basis:
  • Pro-Rata (1/1265th): Under the School Teachers’ Pay and Conditions Document (STPCD), a full-time teacher is contracted for exactly 1,265 hours of directed time per academic year. The tool divides your gross annual salary by 1,265 to establish your precise contractual hourly rate.
  • Flat Casual Rate: Many multi-academy trusts implement a fixed hourly benchmark (such as £35.00 per hour) for all staff undertaking voluntary holiday or weekend tuition, regardless of their position on the main or upper pay scales.
• Calculate Total Extra Earnings: It multiplies your established hourly rate by the total number of additional hours you have worked.

The primary mathematical logic used to parse your extra earnings is:

Official Hourly Rate = Gross Annual Salary / 1265

Total Gross Extra Income = Hourly Rate * Additional Hours Worked

Example Calculation: Sarah’s Weekend Revision Sessions

To see how out-of-hours tutoring impacts a standard monthly payslip, consider this typical secondary school scenario.

Example: Sarah is a full-time secondary science teacher earning a gross annual salary of £41,500. Her headteacher has asked her to run a series of Saturday morning GCSE revision workshops. She agrees to complete 10 total hours of weekend tuition over the month. Her school policy uses the statutory pro-rata calculation.

• Gross Annual Salary: £41,500
• Additional Hours Worked: 10 Hours
• School Pay Policy Agreement Rate: Pro-Rata (1/1265)

Additional earnings projection:

• Calculated Hourly Rate: £41,500 / 1265 = £32.81 per hour
• Total Additional Hours: 10 hours
• Total Gross Extra Income Due: £32.81 * 10 = £328.10

Sarah discovers that running the weekend intervention sessions will add a gross total of £328.10 to her upcoming monthly payslip.

STPCD Rules: Understanding Directed Time vs. Voluntary Hours

Protecting your work-life balance requires a firm understanding of what constitutes standard contractual duty versus supplementary paid work:

• The 1265 Directed Hours Limit: A full-time classroom teacher in a maintained school can only be directed by their headteacher to work for 1,265 hours across 195 days in an academic year. This includes teaching timetables, staff meetings, parent evenings, and inset training days.
• Voluntary Participation: Any activities that fall outside this 1,265-hour directed calendar (such as Saturday interventions, Easter holiday booster classes, or after-school clubs) are strictly voluntary. You cannot be contractually forced to undertake them.
• Out-of-Hours Learning: If you agree to provide out-of-hours learning activities, the STPCD explicitly states that teachers should receive additional payment for this work, which must be formally outlined in the school’s overarching pay policy.

Pro-Rata vs. Flat Rates: What to Look For in Your School Policy

Schools have flexibility in how they compensate supplementary duties. It is important to know which framework your institution utilizes:

• The 1/1265th Pro-Rata Model: This is the fairest method for experienced staff. Because it divides your specific annual salary by the directed hours limit, your hourly overtime rate increases as you move up the Main or Upper Pay Scale.
• The Flat Rate Model: Some academies offer a single flat rate for all intervention sessions. While this might be highly lucrative for an early-career teacher (M1 or M2), it can result in a senior teacher (UPS3) being paid a lower hourly rate for weekend work than their standard weekday contractual rate.

The Ultimate Teacher Additional Hours Tracking Checklist

To ensure your supplementary hours are processed correctly by the payroll department, follow this step-by-step verification guide:

✅ Securing the Agreement

• Request Written Confirmation: Before commencing any out-of-hours instruction, ensure you have a written email from your head of department or business manager confirming the exact hourly rate and the total number of approved hours.
• Check the Pay Policy: Read your school’s annual pay policy document to verify whether they utilise the 1/1265th formula or a flat casual rate for out-of-hours learning.

✅ Logging and Submission

• Track Your Own Time: Keep a personal logbook of the exact dates, times, and student groups taught during your supplementary sessions.
• Submit Timesheets Promptly: Most school payroll providers require ad-hoc overtime claims to be submitted by the 10th of the month. Submit your signed timesheets early to avoid a month-long payment delay.

✅ Reviewing Your Payslip

• Check for Separate Itemisation: Ensure your extra hours are listed as a completely separate line item on your payslip (often marked as “Out of Hours Learning” or “Additional Duties”) rather than being merged into your base salary figure.

How to use the Teacher Overtime Calculator

1. Your Gross Annual Salary: Input your total annual base salary, including any permanent TLR allowances.
2. Additional Hours Worked: Enter the total number of approved out-of-hours session hours you have completed during the claim period.
3. School Pay Policy Agreement Rate: Select the calculation metric that your school utilises (either the statutory 1/1265th Pro-Rata calculation or a benchmark Flat Casual Rate).
4. Review Results: Note your exact hourly rate and the total gross extra income you should expect to see added to your next payslip.

Frequently Asked Questions (FAQs)

Is out-of-hours teaching pay pensionable under the Teachers’ Pension Scheme?
Generally, no. Payments for voluntary out-of-hours learning activities and weekend tuition are usually classified as non-pensionable honoraria. This means you do not pay TPS deductions on this extra money, and it does not increase your long-term career average pension build-up.

Can I be paid extra for marking mock exams during the school holidays?
If your headteacher formally requests that you mark mock examinations during a school holiday period, and this falls outside your 1,265 directed hours, you are entitled to request additional payment. This must be agreed upon in advance.

Do academies have to pay me the 1/1265th hourly rate?
No. Independent academies and free schools are not legally bound by the STPCD. They have the freedom to set their own flat casual rates for out-of-hours work. However, the exact rate must be transparently published in their internal pay policy.

Does this calculator apply to standard evening lesson planning?
No. Standard lesson planning, marking, and report writing are considered part of your professional duties. While they often occur outside of the 1,265 directed hours, they are covered by your overarching annual salary and do not qualify for separate overtime payments.

Sources

• GOV.UK – School Teachers’ Pay and Conditions Document (STPCD) framework and updates
• National Education Union – Full guide to directed time tracking and statutory hourly boundaries
• NASUWT – Operational standards for out-of-hours learning, voluntary sessions, and pay models

This calculator provides estimates based on publicly available UK Department for Education guidelines and STPCD contractual rules. Results should be used for informational purposes only.