Why the cheapest shift is the most expensive you’ll ever book

The hidden cost of underpaying nursery supply staff

When the shift goes unfilled, everyone pays the price — the manager, the children, and ultimately the nursery's budget.

For nursery managers & owners

Why the cheapest shift is the most expensive one you'll ever book

Kalendit Editorial· May 2026· 5 min read

Early years has long been plagued by low pay. It is one of the sector's most stubborn problems — and one of its least discussed. Low pay drives low attractiveness, low commitment and, ultimately, low retention. The staffing crisis is not a mystery. It is, in large part, the predictable consequence of a sector that has chronically undervalued the people doing its most important work.

Supply staff are no different — except the stakes are even higher. When a nursery is already under financial pressure, the temptation to offer supply staff minimum wage is understandable. But it is a false economy, and the data shows it clearly.

Let's start with the obvious question. Can someone actually make a living in London on £12.70 an hour, when the cost of getting to and from a shift can easily consume half of that? The honest answer is no. And if the answer is no, you are not just offering low pay — you are offering a reason not to show up.

The comparison that should make us all uncomfortable

A cleaner in London typically earns between £16 and £20 an hour. With all due respect to that profession — which is essential and honourable — it requires no formal qualifications, no background checks, no safeguarding training, no paediatric first aid certificate.

A nursery educator caring for children aged 0 to 5 — some of the most vulnerable human beings on the planet — has passed an enhanced DBS check, identity verification, reference checks, employment history checks, and holds certificates in safeguarding, food safety and paediatric first aid. If qualified, they have completed a full early years education programme.

And yet we have normalised paying that person £13 an hour unqualified and £15 if qualified. We need to sit with that for a moment. Because the discomfort is warranted.

What the data tells us

At Kalendit, we process thousands of supply bookings across London and the South East. Here is what our coverage data shows:

Coverage rate Unqualified Qualified
⭐ Outstanding — 100% instant coverage
£15/hr
£18+/hr
✅ Good — 85–90% coverage
£14–£14.50/hr
£16.50+/hr
🔴 Risky — Under 50% coverage
Below £13/hr
Below £15.50/hr
The real cost of waiting
Kalendit at fair pay vs calling an agency in a panic
✅ Kalendit · fair rate
£14.50
/hour to educator · 7hr shift
Educator pay (7hrs) £101.50
Kalendit fee (23%) £23.35
Emergency surcharge None
Manager time lost Minimal
Total to nursery £124.85
Educator earns £14.50/hr
Fair pay. Shift filled quickly.
Agency + emergency
⚠️ Agency call in a panic
£24
/hour billed to nursery · same shift
Agency bill (7hrs) £168.00
Agency markup (~35%) included above
Emergency surcharge (~20%) included above
Manager time lost 1–2 hrs chasing
Total to nursery £168.00+
Educator earns ~£13–14/hr
Agency pockets the difference.
The agency costs £39 more per shift — and the educator earns less. The agency pockets the difference.
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The pattern is unambiguous. Post a shift at minimum wage and you will almost certainly not fill it. You will then spend the next 24 to 48 hours chasing cover, eventually paying emergency premium rates as the start time approaches — often more than you would have paid had you offered the right rate from the beginning. The cheapest shift is frequently the most expensive one.

What fair pay actually buys you

Beyond coverage rates, there is a compounding effect that does not show up in a single booking but is very real over time.

Consistency
Educators who feel fairly paid come back. They accept your shifts first.
Network effect
They tell their peers your setting is a good place to work.
Reliability
When you need someone to stay late or step in unexpectedly, they do it without resentment.
Commitment
They invest in training and are willing to go the extra mile for your team.
Retention pipeline
Some start to see early years as a career, not a stopgap. That is how the sector rebuilds.
Preferred setting status
At minimum wage you are a last resort. At fair pay you become first choice.

Talking about the staffing crisis is necessary. Deciding to be part of the solution is better. Fair pay for supply staff is not charity — it is sound operational practice that protects your ratios, your reputation and your relationships with the educators your setting depends on.


The sector will not fix itself. But it changes one booking at a time, and the next one is yours.

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Kalendit Editorial Early years workforce · May 2026
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