Senior Head of Function Reduced/Compressed Hours Calculator
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Looking at a 4-day week, 9-day fortnight, term-time only or annualised hours? This calculator shows how your pay would look for a Senior Head of Function under different reduced or compressed patterns compared to full-time. Compare FTE and annual pay so you can weigh up options.
Assumptions and pay data
Pay data: HMPPS pay (Prison & Probation). Prison Bands 2–5 and 7–12 use PSPRB National 37-hour base rates from 1 April 2026. Probation scales remain illustrative. Add unsocial hours, RHA or London weighting via allowances where they apply.
- Figures are illustrative. We pro-rate full-time band pay by FTE (e.g. 0.8 for 4-day week, 0.9 for 9-day fortnight). Term-time and annualised hours use the same dataset; employer rules may differ.
- All amounts are gross. Tax, NI and pension are not deducted.
Reduced/Compressed Hours Calculator
You'll see:
- Full-time pay vs your chosen pattern (e.g. 4-day week, term-time)
- Pro-rated annual pay and the difference
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Guide for Senior Head of Function
This guide explains reduced and compressed working patterns for Senior Head of Function on Prison Band 8 at Probation & Prisons. Not every employer offers every pattern; use this for pay impact, then confirm eligibility with HR.
Reduced hours for Senior Head of Function
This page models named patterns (four-day week, nine-day fortnight, term-time only, annualised hours) for Senior Head of Function on Prison Band 8 at Probation & Prisons. Pay is pro-rated from full-time HMPPS pay (Prison & Probation) basic pay unless your contract uses a different formula.
Reduced and compressed hours
A four-day week is typically 0.8 FTE. A nine-day fortnight is 0.9 FTE (nine working days in ten). Term-time-only staff are paid for weeks worked per year. Annualised hours contracts spread agreed hours across the year rather than fixed weekly patterns.
Employer variation
Not every employer offers every pattern. Some use a 0.89 FTE term-time formula for support staff. The calculator uses straightforward pro-rata from full-time band pay; your payroll may differ.
Example scenario
Illustrative example at bottom of band (matches calculator defaults)
| Band / grade | Prison Band 8 |
|---|---|
| Full-time gross (example) | £57,398 |
| At 0.8 FTE (example) | £45,918 |
| Annual difference vs full-time | £11,480 |
Frequently asked questions
What does this reduced/compressed hours calculator do?
It shows how your gross pay changes when you work a 4-day week (0.8 FTE), 9-day fortnight (0.9 FTE), term-time only, annualised hours, or a custom FTE. You see full-time vs your chosen pattern and the annual difference.
How is 9-day fortnight worked out?
A 9-day fortnight is 0.9 FTE: you work 9 out of 10 working days. Pay is typically pro-rated to 90% of full-time. Employer rules may differ.
What about term-time only?
You enter how many weeks you work per year (e.g. 39). We pro-rate full-time annual pay to that proportion of the year. Your employer may use a different method; check your contract.
What are annualised hours?
You agree a total number of hours per year rather than fixed weekly hours. We use your annual hours and full-time equivalent hours to derive FTE and show pro-rated pay. Actual arrangements vary by employer.
As a Senior Head of Function, will my employer offer these patterns?
Eligibility varies by employer and contract. Use this as a guide to pay impact; your HR or contract can confirm what patterns are available and how they are calculated.
Are the figures official?
No. Figures are illustrative. Pro-rata and pattern rules vary by employer. Always check your contract or HR.
Is the result gross or net?
Gross. Tax, National Insurance and pension are not deducted. Your actual take-home will be lower.
Can I compare several patterns?
Change the pattern and FTE options and recalculate. Try 4-day week, 9-day fortnight and term-time to see the pay difference.
Do you store my data?
No. Calculations run locally in your browser. We do not store personal information.
How does this differ from the part-time calculator?
The part-time calculator focuses on a single FTE slider. This one offers preset patterns (4-day week, 9-day fortnight, term-time, annualised) plus custom FTE, so you can compare specific reduced or compressed arrangements.
About this role
What is a Senior Head of Function?
A Senior Head of Function (Fair and Sustainable Band 8) is an operational manager grade that can cover senior Head of Function posts or early Deputy Governor responsibilities, depending on the establishment. Pay is a National range; RHA often applies.
Typical demands, progression and balance
Band 8 posts deepen leadership across larger or more complex functions and are a common step toward Deputy Governor and Governor roles.
What about 4-day weeks or compressed hours?
Many employers support 4-day weeks, 9-day fortnights, term-time only or annualised hours. Use the calculator above to compare full-time pay with your chosen pattern for your band.
Disclaimer
This calculator provides illustrative estimates only and is not financial or career advice. Pay rules and allowances can change. Always check your employer or official sources for definitive figures.