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Applying9 min readChecked 2026-09-14

UCAS and the Common App: two systems that want opposite things from you

One asks a single academic question and wants one answer. The other asks who you are and wants many. Confusing them is the most common reason a strong student gets thin results.

Photo: Diliff · CC BY-SA 3.0 · Source

UCAS is a single form, up to five course choices, one personal statement, one reference and one set of predicted grades. Every university sees the same document. The Common App is a single form too, but each university adds its own supplementary essays, and the main essay is personal rather than academic.

UCAS (UK)Common App (US)
ChoicesFive courses; one only at Oxford or CambridgeEffectively unlimited, but each adds essays
Main essayOne academic statement, sent to all fiveOne personal essay plus supplements per university
What is assessedAcademic fit for one subjectThe whole person: academics, activities, character
ExtracurricularsOnly if relevant to the subjectA central part of the application
Key deadlinesMid-October for Oxbridge, medicine and vet; late January for mostEarly action and early decision in November; regular in early January

The trap in the UCAS statement

You write one statement for all five choices, so the five must be closely related. Applying to economics at two universities and history at three means writing something vague enough to cover both — and vague loses to specific every time. Pick one subject, or one clearly connected pair, and commit.

The trap in the Common App

Supplementary essays scale with the number of universities. Twelve applications can mean thirty separate pieces of writing, all due within the same two months as your IB internal assessments. Eight well-researched applications beat fifteen rushed ones, and the number that actually fits a person's autumn is usually smaller than the one they first write down.

A workable calendar for an IB student

  1. 1Spring of year one: shortlist countries and subjects; sit any admissions tests that are offered early.
  2. 2Summer between the years: draft the personal statement and the Common App essay. This is the only quiet stretch you will get.
  3. 3September: ask for references, confirm predicted grades, register for tests.
  4. 4October: submit early UK applications; finish supplements for early US deadlines.
  5. 5November to January: remaining submissions, interviews, and the rest of the IB, which has not paused for any of this.

What to remember

  • UCAS judges academic fit for one subject; the Common App judges the whole person.
  • All five UCAS choices share one statement, so they must be closely related.
  • Each extra US application costs real essays — cap the list at what you can write well.
  • Draft both essays in the summer between the two IB years.

Sources

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