Headcount vs FTE: how teacher numbers are counted

In short

Headcount counts each teacher as one person. Full-time equivalent (FTE) counts a part-time teacher as a fraction of a full-time post. Because teachers can change their hours, the two measures can move in different directions.

If a full-time teacher drops to three days a week, the headcount is unchanged (still one person) but the FTE falls (from 1.0 to 0.6). So in a year when many teachers reduce their hours, the FTE workforce can shrink even if the number of people barely changes.

This is exactly what happened recently: more teachers joined than left, yet total FTE still fell, because existing teachers cutting their hours removed the equivalent of thousands of full-time posts. The Workforce Explorer shows this “why did the workforce fall when more joined than left?” story in full.

📊 See entrants, leavers and the working-hours story

Sources & how this was made

Key official sources: the Department for Education’s Get Into Teaching and Teach in Further Education services, and GOV.UK guidance on initial teacher training, qualified teacher status, FE initial teacher education funding and the Early Career Teacher Entitlement; the Society for Education and Training on QTLS; and DfE statistics (School Workforce in England, the ITT Census, Teacher demand and postgraduate trainee need, and the Further education workforce releases) on Explore Education Statistics, under the Open Government Licence v3.0.

Last reviewed: 15 August 2026. Teacher training rules, funding and figures change – always confirm current details with Get Into Teaching and GOV.UK.

How this was made: developed and cross-checked with AI assistance alongside expert human review by tutor2u. It is an independent, plain-English guide, not official DfE guidance.