3 October 2026

How to cut cover costs in a primary

Five ways a primary spends less on cover: an internal order, a fairness count, protected interventions, tighter supply, and a weekly look at the bill.

Cover cost in a primary is not only the supply invoice. It is the hour a head spends at 07:40, the TA taken off a reading group, and the afternoon you pay supply because the internal list was never written down. Cutting it means changing those three, not buying a cheaper agency on its own. The hours model for a small primary is the 15-staff example.

Name the costs you have

Supply day rates vary by agency, role and region. Do not use a national average you saw in a thread. Use last term's invoices. Internal cost is the loaded time of the people arranging cover and the sessions that did not run. In our models, rota time is costed at leadership pay because that is who often owns the sheet, using STPCD 2025/26 for England outside London. If your office manager owns it, the hourly rate is different and the hours may not be. Savings shows the method. What STPCD means for cover is why teacher pay is the wrong mental model for a TA's afternoon, and the right one for a head's morning.

1. Write an internal order

Who can cover a class. Who can cover a duty. Who is last. In a primary the first names are usually TAs who are genuinely free, then other support staff, then office if you have agreed it, then leadership. 'Whoever is in the office' is how the head teaches every Thursday. Write the order once. Cover management can follow it. A sheet can too, if someone maintains it.

2. Count fairness every week

The cost of unfair cover is sickness and supply later. The same two TAs covering every absence will not say so in September. They will be off in November, and you will book supply on top of the pattern that caused it. A weekly tally is cheaper than that invoice. It also gives you something to show if a governor asks whether cover is shared.

3. Stop spending interventions as if they were spare

A reading group or an ELSA session looks free because it is not a whole class. It is often the most expensive thing you cancel, because you pay for it in catch-up later, or in a conversation with parents you cannot evidence. Protect the ones you mean to protect. Record the ones you drop. If you cannot say how many ran this half term, you cannot know whether cover is the reason.

4. Book supply on purpose

Supply is not a failure. It is the right spend when the absence is long, the lesson needs a teacher, or internal cover would break a duty you cannot leave empty. Agree when you book it, who is allowed to book it, and which agencies you will actually phone. Day-to-day supply for a gap you could have seen on Monday is the expensive version. A known absence arranged the week before is the cheap version, even when the invoice looks the same, because you have not also burned the morning.

5. Look at the week, not the year

Once a week: absences, internal cover, supply days, sessions missed. Once a term: is one class, one day or one person driving it. A termly review with no weekly note is a story. The weekly note is how you notice a pattern while you can still change the rota.

None of this needs a new job title. It needs the list to be current and the count to be kept. If the spreadsheet is the thing stopping that, the comparison is SchoolRota vs the spreadsheet. The trial is 30 days on your own staff, no card, and it will not ring an agency for you.

A term you can compare

Keep four numbers, weekly, in the same place: staff hours spent arranging cover, internal cover slots used, supply days booked, interventions missed. You do not need a finance system. A page is enough if it is the same page every Friday. At the end of term you can see whether the agency bill moved, and whether you bought that movement by cancelling reading groups. If the bill fell and the missed sessions rose, you have not saved money. You have moved it.

The primary case study prices leadership time because that is who often owns the sheet. If your office manager owns it, use their loaded hourly cost instead and do not borrow a headteacher rate to make the slide look larger. Honest numbers are what a governor can use. A modelled saving that your school does not recognise will not change how Tuesday works. Start from last term's invoices and last term's hours, then decide whether the morning is the thing to change. If the invoices are already small and the morning is already calm, stop. You do not have a cover-cost problem. You have a normal school.

Price one avoided supply day against one protected intervention and see which your school is choosing. If every short-notice absence becomes an agency booking, the internal order is not being used. If every short-notice absence becomes a cancelled reading group, the order is being used on the wrong people. The weekly numbers tell you which of those you are. Guessing from memory will pick the story that flatters the morning. Put the four weekly numbers where the head will see them without asking. A number that has to be requested is a number that arrives too late to change the next week. Compare this term with last term before you announce a saving. One cheap week is not a trend. Two cheap terms might be. A governor will ask what you stopped doing to get there, so have the missed-session count in the same note as the invoice. File that note with the supply invoices for the same weeks.

Start a 30-day trial on your own school. No card.