February 4, 2026 · 5 min
The test-prep timeline that actually works
12 months out, diagnostic. 8 months, target score locked. 4 months, first attempt. 2 months, retake window.
#timeline
Most students start test prep too late. The timeline that consistently produces the highest scores:
T–12 months: full-length diagnostic (IELTS/TOEFL/PTE for language; GRE/GMAT/SAT for aptitude).
T–10 to T–8 months: structured prep, coaching or self-study for 12–15 hours/week. Target score locked by month 8.
T–4 months: first official attempt. Even if you hit target, this gives room for a retake.
T–2 months: retake if needed. Don't stack two tests in the same 3-month window.