Overview
Official 0620 Chemistry grade boundaries for June 2026 publish in August — IGCSE grades 18 August 2026, component threshold tables around 13 August. Estimate with marked past papers via the [0620 calculator](/tools/grade-boundary-calculator/0620).
Quick answer
For Cambridge syllabus 0620, [Post-exam prep](/blog/cambridge-post-exam-results-prep-2026) — [Results day guide](/blog/cambridge-results-day-august-2026-guide)
| Question | Answer |
|---|---|
| When are June 2026 IGCSE grades released? | 18 August 2026 (06:00 GMT) |
| When are threshold tables published? | ~13 August 2026 |
| Papers? | MCQ + theory + practical / alternative to practical (check your entry) |
| Marking style? | Equations, moles, and precise terms on structured Qs |
| Estimate tool | 0620 grade calculator |
What are grade boundaries?
For Cambridge syllabus 0620, grade boundaries are the minimum raw marks for each grade on every 0620 component — MCQ, theory, and practical or ATP. Cambridge sets a separate threshold per component code; your overall grade is a weighted aggregate where A* reflects syllabus performance, not a single paper in isolation. Percentages from classroom tests do not translate directly to IGCSE raw marks.
How Cambridge sets 0620 boundaries
Examiners finish marking before thresholds are published. Harder stoichiometry or structured papers usually mean lower raw cut-offs for the same grade — comparable outcomes, not "grade inflation." Check your exact paper numbers in the PDF; using last year's 5070 O-Level table for 0620 is a common results-week mistake ([insights](/insights)).
Core vs Extended at a glance
For Cambridge syllabus 0620, confirm your entry with your exams officer — mixing tiers is not allowed.
| Tier | Typical papers | Grade range |
|---|---|---|
| Core | Paper 1 + Paper 3 (+ practical route) | C to G |
| Extended | Paper 2 + Paper 4 (+ practical route) | A* to E |
How to estimate your grade
This section covers How to estimate your grade — ranked by what Cambridge examiners return to most often in past papers.
- Timed paper for your tier — mark state symbols, mole ratios, and units against the scheme without leniency.
- Split lost marks into calculation slips vs recall gaps so revision targets the right skill.
- Compare component raw marks to June 2024/2023 in the 0620 calculator, using exact component codes from your entry form.
Frequently asked questions
For Cambridge syllabus 0620, threshold PDFs ~13 August; grades 18 August.
When are official boundaries released?
Is 80% always an A*?
No — raw thresholds change every session.
IGCSE vs O-Level Chemistry?
Confirm your 0620 code on your statement of entry — papers differ from 5070.
Related subjects
For Cambridge syllabus 0620, each science code has its own threshold PDF — use these guides for revision links and calculator paths. Never copy threshold numbers between syllabuses, sessions, or paper variants. See the [grade boundaries hub](/guides/grade-boundaries) for every syllabus calculator. Cross-link below for adjacent syllabuses only; never swap threshold numbers between codes or sessions.