Prison officer promotion pay calculator

What this promotion pay calculator does

This is a prison officer promotion pay calculator built on the published 2026/27 pay tables, not on rough percentages. You choose your current band and pay point (Band 3 Prison Officer or Band 4 Supervising Officer), the band you are aiming for, your contract hours and your pay zone, and it shows what the move is worth after income tax, National Insurance and your Civil Service alpha pension contribution.

The headline number is the extra take-home a month, because that is what you actually feel. The gross difference between two bands is always bigger than what reaches your account, and the gap is wider than most people expect: on the default example you keep roughly two thirds of every extra pound.

Everything runs in your browser as you type. Nothing you enter is sent anywhere unless you choose to ask the AI assistant a question, and then only the figures on screen go, never a name or contact detail.

The pay you are comparing: Band 3, Band 4 and Band 5

The Prison Service Pay Review Body's 2026 report (accepted in full on 26 March 2026, effective 1 April 2026) sets the National figures below. They are annual pay for a 37-hour contract including the 20% unsocial working hours allowance. London zones add a fixed cash differential, and 39-hour and 41-hour contracts add further committed hours, which the calculator handles for you.

A worked example: Band 3 maximum to Band 4

Take a National Band 3 officer on the top pay point and a 37-hour contract: £36,778 a year. Promoted to the Band 4 spot rate of £41,328, gross pay rises by £4,550. Both salaries sit in the 5.45% alpha contribution band (pensionable earnings between £36,200 and £56,000), so the pension share is the same percentage on a larger number.

Run through the calculator, take-home rises from about £2,366 a month to about £2,623, an extra £256 a month or roughly £3,000 a year, about 68p in the pound. The rest goes in income tax (20% on the slice above the personal allowance), National Insurance (8% above £12,570) and pension contributions. Move on to Band 5 at pay point 1 (£44,900) and the extra becomes about £458 a month compared with the Band 3 maximum.

If you are lower in Band 3, the jump is bigger. From pay point 1 (£34,928) to Band 4 the gross rise is £6,400 and the take-home rise is about £341 a month. These examples use national rates, 37 hours, no Payment Plus and no supplement; yours will differ, which is exactly why the calculator takes your own inputs.

What can change the answer

• Contract hours. A Band 3 officer on 39 or 41 hours earns more than the 37-hour table. Bands 4 and 5 publish only 37-hour and 39-hour (2 pensionable additional committed hours) rows, so a 41-hour Band 3 officer may not have an identical like-for-like option after promotion.
• Market supplements. Band 3 officers at 18 named prisons receive between £1,500 and £3,500 a year, non-pensionable. They are described as paid to Band 3 officers, so the calculator lets you assume the supplement stops on promotion. Confirm with HR before relying on it either way.
• Payment Plus. £23 an hour from 1 April 2026, non-consolidated and non-pensionable, for qualifying duties only. If you rely on it, enter your typical hours. Note that the pay review body observed that some Band 4 and 5 staff on Payment Plus are paid less than their normal hourly rate for those duties.
• London zones. Inner and Outer London add fixed cash amounts, so the cash gap between bands is slightly different there.
• The pay point you land on. Employers set the real starting point on promotion; the calculator lets you try each published point.

Pension: the part people forget

A higher pensionable salary means a slightly higher contribution now and more pension later. In alpha, you build 2.32% of your pensionable earnings each year (revalued each April by CPI). Moving from £36,778 to £41,328 of pensionable pay adds roughly £106 a year of pension for every year you spend at the higher level, before revaluation. Over a long career that is real money, and it is why the calculator reports it separately.

Which pay elements are pensionable is a detail worth checking on your own payslip. The unsocial hours allowance is pensionable; Payment Plus and market supplements are not. Whether plain additional committed hours count is not confirmed in the sources we use, so the calculator has an explicit assumption setting.

Is promotion worth it? Think beyond the first month

The first-month figure is only part of the picture. Band 3 and Band 5 have three pay points and, under the 2026 award, staff not on a poor-performance procedure moved up one point. Staying in Band 3 you would also progress to the maximum. The paid pay-impact planner on the Promotion Prep Pack models that: it compares staying put with promoting after any number of months over five years, with your own pay-award assumption, and tells you how many hours of Payment Plus a month the promotion is worth.

Money is not the only measure. Band 4 and Band 5 roles carry more responsibility, different shift patterns and different pressures. Read the vacancy pack, speak to people doing the job, and use the numbers as one input, not the decision. For a fuller discussion see the promotion guide and pay progression.

Preparing for a promotion application

Promotion processes are set locally and nationally by HMPPS and change over time, so we do not publish a 'how the assessment is scored' guide: we do not know, and anyone who claims to is guessing. What we can say is that Ministry of Justice vacancy packs for supervisory roles typically list Civil Service Success Profile behaviours such as Leadership, Communicating and Influencing, and Making Effective Decisions, and ask for real, specific examples.

The paid pack gives you a structured evidence bank mapped to those behaviours, practice questions clearly labelled as practice, optional AI feedback on your written examples, and a 12-week plan. It never promises an outcome.

Limits of this calculator

• England and Wales (PSPRB) rates only. Scotland (SPS) and Northern Ireland (NIPS) pay is different.
• Standard tax code, no student loan, no Scottish income tax, no benefits interactions.
• Pay tables are the published scale rates; allowances and individual circumstances can move your payslip.
• It estimates; it does not replace your payslip, contract or HR advice.