How long do teachers stay in service? The DfE comment in their analysis of the latest data that Retention rates for teachers increased for both the newest teacher cohort who qualified in 2023 and for second year retention for those who qualified in 2022, while decreasing for most earlier cohorts compared to the equivalent measure last year.

Now after a period where retention rates have been declining that’s good news, and with the worsening general labour market and an older teacher workforce than in recent years, I expect retention rates to continue to improve over the next few years.

However, the improvement is something of a mixed blessing. Teachers with longer service tend to cost more, and if schools are funded for average salary costs, more schools will find the pay bill higher than the funding, especially as pupil numbers drop.

At the same time, higher retention rates mean fewer vacancies as rolls fall unless schools receive real increases in their funding that allows additional teachers to be recruited (the Spending Review will answer that question).

If past history is anything to go by, then different regions of the country will be affected differently. My guess is that retention rates will be lower in London and the Home Counties, and higher the further north and west you travel across England. This improvement in retention rates is bad news for job hunters, and also bad news for recruitment agencies that make their profits from schools advertising vacancies unless schools’ resort to only offering one-year contracts that are not then renewed.

Any reduction in job opportunities may also be bad news for teachers trying to return to work in the United Kingdom from abroad. Add in the decline in the number of pupils in private schools, some 11,000 in the latest data, when compared with the previous year’s data, and that might be somewhere around 750 less jobs in that sector in one year.

Although retention is better for the first two years of service in the latest data from the DfE, rates still have some way to go to return to levels of twenty years ago.

% in service after each year of service	2003 entrants	Latest	Difference
1	91	89.7	-1.3
2	85	80.5	-4.5
3	81	73.2	-7.8
4	78	70.2	-7.8
5	76	67.6	-8.4
6	75	64.6	-10.4
7	73	62.5	-10.5
8	70	60.6	-9.4
9	68	59.2	-8.8
10	66	57	-9

The table compares the latest data with the 2003 entry cohort survival rates for their first ten years of service. So, 66% of the 2003 cohort were still in teaching after ten years, but only 57% of the 2014 cohort were still in teaching after ten years.

The table shows an alarming difference for teachers with six to seven years of service, the group that might be expected to be taking on middle leadership positions. Hopefully, the new pay rise will be a further incentive to persuade teachers to to quit. Knowing why they do quit, and where they go, is some other data the DfE might wish to share with everyone.