What Year Is My Child In? UK Years, Forms and Ages Mapped

UK year groups mapped to the form names used by most prep schools. The highlighted Year 5 row is the critical year for 13+ registration deadlines.

You'll be mid-conversation with an admissions registrar when they mention "Form IV" and you'll nod along pretending you know exactly what that means. We've all been there. It's one of those small pieces of knowledge that nobody tells you, and that can matter enormously when you're reading a registration deadline.

If you want to see the full admissions timeline laid out from nursery to sixth form, our admissions timeline guide covers every stage in order.

It's a lot to take in. Most parents need to come back to this twice. The key is knowing which system your specific school uses.

The Year system

Since 2014, most independent schools have adopted the national Year group nomenclature alongside — or instead of — their traditional form names. Year 1 through Year 13 maps directly across from state to independent. The starting point is Reception (age 4–5), which precedes Year 1.

Most schools now use Year numbers in everyday communication. You'll still encounter form names in older correspondence, at traditional schools, and in letters from senior schools with long institutional memories.

The Form system

Traditional prep schools use a Roman numeral form system. The confusion begins here, because the starting point varies.

Many prep schools begin their form system at Form I = Year 3 (age 7–8) — the point at which children typically move from a pre-prep into the main prep school. In these schools, Form VI = Year 8.

Other schools begin their form system earlier, with Form I at Year 1 or even Reception, which shifts every form name by two or three years.

The Form naming system works differently at prep school level and senior school level.

At prep school (Years 3–8), most schools count from Form I to Form VI — starting at Year 3 and ending at Year 8.

At senior school (Years 7–11), the same Roman numeral numbers are reused but the names are usually written out in full: First Form, Second Form, Third Form, Fourth Form, Fifth Form. Lower Sixth and Upper Sixth follow for Years 12 and 13.

'Third Form' means different things at prep school and senior school. At prep school, Third Form is usually Year 5. At senior school, it's Year 9. Always check which level the school is talking about.

The Sixth Form: the one consistent naming system

The one part of the independent school system where naming is consistent across virtually every school is the Sixth Form.

Lower Sixth = Year 12 (age 16–17) Upper Sixth = Year 13 (age 17–18)

A-levels are sat in Upper Sixth. University applications (UCAS) are submitted during Upper Sixth. This naming is so universal that even state schools use it informally.

Why this matters for admissions — and where parents go wrong

This is where parents get caught out.

Consider this scenario. A highly selective boarding school sends a letter to prep school heads stating that registration for 13+ entry must be completed "by the end of the Michaelmas term in Form III." In this school's system, Form III = Year 5. In another school's system, Form III = Year 7. A parent who reads this letter and assumes their child has two more years when they actually have one term risks missing the deadline entirely — for a full breakdown of the 11+ and 13+ routes and their registration timelines, see our 11+ vs 13+ entry guide.

Yes, it's a lot. Most parents feel exactly the same when they first see it laid out. But there's a simple rule that prevents this mistake.

Age ranges: a quick sanity check

Ages are based on the 1 September school year cutoff. Children born in August are the youngest in their year; children born in September are the oldest.

To make this concrete: a child born on 25 August and a child born on 7 September are just two weeks apart in age. But they are in completely different school years. The August child is the very youngest in their year group — they will sit their 11+ exams at age 10, almost a full year younger than their September-born classmates. The September child is the oldest in the year below — they will sit the same exams at nearly 11, with twelve extra months of development behind them.

This difference matters most in the early years and tends to even out naturally over time. In the context of admissions, it is simply worth being aware of — many schools factor in a child's position within the year when looking at results, and some do so formally. If your child is a summer baby, it is always worth mentioning it to the admissions office when you make contact. Most will be familiar with the question.

If you're joining from a different school system

The UK year group and form system is not used everywhere. If your child has been schooled abroad, or if you are relocating to the UK from another country, the naming conventions here will likely feel unfamiliar at first.

If it helps, here's how it lines up with some other systems you might be coming from:

• The United States uses a grade system running from Kindergarten through Grade 12. Year 7 in the UK is broadly equivalent to 6th Grade in the US. Year 13 (Upper Sixth) maps to 12th Grade — the final year before university.

• France uses a descending class system, from Sixième (equivalent to Year 7) down to Terminale (equivalent to Year 13). The numbering runs backwards to the UK system, which can be disorienting at first.

• Germany and much of continental Europe uses a year-based system similar in structure to the UK, though the age ranges and school stages differ.

• The International Baccalaureate (IB) system, used at international schools worldwide, maps reasonably closely to the UK system at secondary level. The IB Diploma Programme corresponds to Sixth Form (Years 12–13).

That said, if your child has attended a British international school — in Hong Kong, Singapore, Dubai, Mumbai, Nairobi, or elsewhere — they will already be fully familiar with Year groups, form names, and the admissions structure described in this guide. British international schools follow the same curriculum framework and typically use the same terminology.

If your child is moving from a non-British system into UK independent schools, the most important thing to establish early is which Year group they will be entering. Schools determine this based on your child's age as of 1 September of the entry year — not on which year group they were in at their previous school. A quick call to the admissions office of your target school will confirm this immediately.

For families arriving partway through the UK calendar, the guide on boarding school late applications covers what's still open across the year groups — and what the honest picture looks like when the main round has already passed.

How preptimely handles this

One thing worth knowing: preptimely uses Year numbers throughout — not form names. So whatever system your child's school uses, you'll always see deadlines labelled in plain Year group language, calculated to your child's exact date of birth.

It takes ten seconds. Enter your child's birthday and you'll see exactly which Year they're in, and where 7+, 11+, and 13+ fall for them.