US admissions confuses most IB students because it's built on completely different logic from UCAS or local SG admissions. There's no clear IB score cutoff. There's no points conversion. You could have IB 42 and get rejected from schools that accepted someone with IB 35.

That's not random — it's intentional. Here's how to understand the system and use your IB profile to your advantage.

The one decision that matters most before you apply

Should you apply Early Decision (ED) or Regular Decision (RD)?

ED closes November 1 and is binding — if you're accepted, you commit to attending and withdraw all other applications. RD closes January 1 and gives you flexibility to compare offers. Most students default to RD because it feels safer. But if you have a genuine first choice, ED is worth understanding properly.

ED acceptance rates at selective schools are often 2–3x higher than RD. That's partly because yield matters to universities (an ED admit is guaranteed to enroll), and partly because ED pools tend to have students who are genuinely enthusiastic about the school. If your first choice is clear and your financial situation allows it (you can't negotiate aid after an ED acceptance), apply ED.

EA (Early Action) at schools like MIT and Caltech is non-binding and worth doing if you're competitive. Apply EA wherever it's offered for your target schools — you get your decision earlier without the ED commitment.

How IB actually maps to US admissions

US universities don't use an IB-to-GPA conversion table. What they actually assess:

Course rigour. Taking HL courses signals that you challenged yourself. HL Maths, HL Physics, HL Economics — admissions readers see these as evidence of intellectual stretch. If you're applying to an engineering program, HL Maths is expected. If you're applying to a humanities program, HL Literature and HL History tell a story. HL grades. A 7 in HL Chemistry is roughly equivalent to A* in the eyes of most US admissions offices. 6s and 7s at HL in relevant subjects are strong. A 5 at HL isn't alarming, but it shouldn't be in your most critical subject. Your predicted score and transcript. Your school counsellor submits your predicted IB total and your internal grade history. A predicted 38+ is broadly competitive at selective schools. But consistency matters — if your grades dropped significantly in Y2, expect that to be noticed. EE and TOK. These are things most US applicants don't have. A strong Extended Essay in a field related to your intended major is genuinely useful — it shows self-directed research ability. Mention it in your essays if it's relevant.

The essays: this is where you either differentiate or disappear

The Common App main essay is 650 words. Most applicants write about sports, mission trips, or a challenge they overcame — and most of those essays are forgettable. The prompts are just frames; what matters is whether the reader finishes the essay knowing something specific and vivid about you that they couldn't have guessed from your transcript.

IB students have genuinely good material: the Extended Essay process, CAS experiences that went wrong and taught something real, the intellectual collision between two HL subjects. Use it. Don't write about the IB itself — write about what it made you think, do, or question.

Supplemental essays are school-specific and often shorter (150–250 words). The "Why This School" supplement is where most applicants write generic things about rankings and research opportunities. Don't. Go specific: a professor whose paper you read, a course that only that school offers, a student organisation you'd join on day one. Specificity signals genuine interest.

Start drafts in June or July of Year 2. If you wait until September with UCAS and IB assessments running simultaneously, you'll produce mediocre essays under pressure.

SAT/ACT: yes, you probably need it now

Most selective US universities have reinstated standardised testing requirements after the COVID-era test-optional period. MIT, Yale, Dartmouth, and others have publicly reversed their test-optional policies.

For IB students, the SAT is manageable because you already know the content. SAT Maths tests to roughly GCSE/SL level — if you're doing HL Maths, you're over-prepared. SAT Reading and Writing rewards close reading, which IB trains you for through Paper 1 and Paper 2.

The right time to sit the SAT is March or May of IB Year 1. That gives you a score before Y2 begins, leaves time to retake if needed, and means you're not prepping for SAT and IB IA deadlines simultaneously. Aim for 1480+ if applying to top-20 schools; 1550+ for MIT, Caltech, and Ivies.

Key dates for 2027 US entry

SAT registration: Rolling — book at least 6 weeks ahead of test date
EA/ED deadline: November 1, 2026 (most schools)
RD deadline: January 1, 2027 (most schools); January 15 for some
Financial aid forms (CSS Profile, FAFSA): Submit alongside application — do not wait
Decisions: EA/ED in mid-December 2026; RD in late March 2027

The March decision date is the brutal part of US admissions. You'll be managing IB internal assessments, potentially holding UK offers, and waiting for US decisions simultaneously. Having a clear decision framework before March — in what order do you prefer your likely options? — means you can act quickly when decisions land.

One thing most Singapore students underestimate

The letters of recommendation matter more than they seem. US admissions readers put significant weight on teacher recommendations — not just whether they say you're good, but whether they say something specific that the rest of your application doesn't.

Choose teachers who know you well in academically rigorous subjects, not just the subjects you scored highest in. Give them enough time — ask in March or April of Y1, brief them on what you're applying for, and share drafts of your essays so they can reinforce the same themes.

Common App guide for IB students: deadlines, essays, and what US universities want