IELTS and CEFR: The Official Correspondence, Grey Zones Included
IELTS (International English Language Testing System) is the world's most widely taken English test for university admissions, employment, and immigration. Unlike the CEFR (A1 to C2) or a scale like ACTFL, IELTS scores on a continuous 0-to-9 band scale, in half-point steps (5.0, 5.5, 6.0…). The test is jointly owned by British Council, IDP: IELTS Australia, and Cambridge Assessment English.
Ask « what CEFR level is IELTS 6.5? » and most sites will hand you a clean table — one band, one level, done. This page starts from a different premise, and it's IELTS's own: that kind of clean table doesn't actually exist. IELTS says so directly, and goes further: it names the specific bands where the line between two CEFR levels isn't settled. That honesty — rather than a single, tidy, wrong number — is the actual point of this page.
The CEFR↔IELTS correspondence, with its confidence level
Key
- Solid — IELTS states this explicitly, or it follows directly and unambiguously from a threshold IELTS cites.
- Moderate — consistent with the explicit thresholds on either side, but not stated word-for-word by IELTS for this specific band.
- ⚠️ Borderline zone — IELTS itself names this band as ambiguous between two CEFR levels. Not to be resolved into a single answer.
- Not documented — IELTS publishes no verifiable correspondence for this range.
| IELTS Band (overall) | CEFR Level | Status |
|---|---|---|
| 9.0 | C2 | Solid (inferred) |
| 8.5 | C2 | Solid — stated by IELTS |
| 8.0 | ⚠️ C1 / C2 borderline | Grey zone named by IELTS |
| 7.5 | C1 | Solid (inferred) |
| 7.0 | C1 | Moderate |
| 6.5 | ⚠️ B2 / C1 borderline | Grey zone named by IELTS |
| 6.0 | B2 | Moderate (cross-referenced) |
| 5.5 | B2 | Moderate (cross-referenced) |
| 5.0 | ⚠️ B1 / B2 borderline | Grey zone named by IELTS |
| 4.5 | B1 | Moderate (cross-referenced) |
| 4.0 | B1 | Moderate (cross-referenced) |
| 3.5 and below | Not documented by IELTS | No official correspondence published |
Bands marked « cross-referenced » are consistent with the range published by IDP: IELTS Australia (one of IELTS's three joint owners), in the absence of a dedicated IELTS quote for those specific bands.
Source: IELTS, « IELTS and the CEFR » (a document updated periodically; ielts.org does not publish a fixed publication date for this page). View the official page
The core of the matter: three borderline zones IELTS names itself
This is the central nuance of this page. IELTS doesn't just say, in general terms, that its CEFR correspondence is approximate — it names three specific bands where the CEFR level isn't settled.
The general principle first, in IELTS's own words:
« there will not be a one-to-one correspondence between IELTS scores and CEFR levels » — and, further: « IELTS band scores have never aligned exactly with the CEFR transition points. »
Part of the reason lies in the measuring instrument itself: the CEFR « was not designed to provide the basis for precise equating ». Those principled limits are what play out, concretely, as the three borderline zones below.
Band 8.0: the C1 / C2 borderline
« Band scores of 8.5 and higher are recognised as C2. Band 8 is borderline. »Band 8.5 is unambiguously C2. Band 8.0 is not — IELTS calls it borderline outright.
Band 6.5: the B2 / C1 borderline — the one people actually search for
This is probably the most-searched zone, since the C1 threshold determines admission into many selective university programs. IELTS places that threshold between bands 6.5 and 7:
« a C1 minimum threshold would fall between the 6.5 and 7 bands. »« many 6.5 test takers would be at C1, a number will be marginally below. »In practice: two candidates can both score 6.5 — one solidly B2, the other just barely C1 — and the overall band alone doesn't tell you which is which.
Band 5.0: the B1 / B2 borderline
« it is not clear whether band 5 is B1 or B2. »About as direct as it gets: IELTS itself doesn't resolve this one.
Why this matters
These three grey zones aren't a peripheral technicality. They sit exactly where the decisions that matter to this page's readers actually get made. A university cutoff set at « B2 minimum » or « C1 required » very often lands precisely on one of these bands. A candidate scoring 6.5 who's aiming for a program that requires C1 needs to know their position isn't settled — not be handed a table that quietly decides it for them.
Valid for the overall band — not per skill
IELTS states that the correspondence above applies only to the overall band score, not to the four individual skill scores:
« the IELTS band scores referred to [...] are the overall band scores, not the individual band scores for Listening, Reading, Writing, and Speaking. »A candidate with an overall band of 6.5 but wildly uneven skill scores (say, 8.0 in Reading and 5.0 in Speaking) has, according to this source, no officially established CEFR correspondence for each skill individually — only for the rounded overall average.
Academic or General Training? None of the sources reviewed distinguish the CEFR correspondence by test version. That's not the same as confirming it's identical for both — only that no official statement differentiates the two versions explicitly.
Other caveats
Which direction does this correspondence run?
Unlike some other scales where the reverse direction is formally ruled out, IELTS doesn't state a rule that categorical. What its documentation shows instead is a shift in practice over time:
« Previously we provided advice as to the score on IELTS that a test taker who was at a given CEFR level might achieve. »The past tense (« previously ») suggests IELTS used to document the CEFR→IELTS direction, and now emphasizes the reverse (IELTS→CEFR). This isn't a strict rule — more a shift in emphasis worth keeping in mind before leaning on this page in either direction.
The CEFR doesn't certify any test
A useful reminder: the CEFR isn't a certifying body. It doesn't validate or verify the correspondence any given test claims with its levels. IELTS puts it plainly:
« CEFR isn't an accreditation scheme – each test provider, including IELTS, needs to carry out its own research and provide its own evidence. »The correspondence on this page, in other words, is one IELTS establishes and documents itself, from its own research — not a certification issued by an independent third party.
Use cases
The CEFR↔IELTS correspondence mainly serves an academic need: helping an institution that thinks in CEFR terms make sense of an IELTS score earned elsewhere, and vice versa.
University admission with an IELTS score
A candidate with an IELTS 6.5 applying to a program that requires « B2 minimum » or « C1 » is working right in the grey zone described above: their exact position isn't settled by IELTS itself. A band comfortably above a published cutoff (7.0 rather than 6.5, for instance) offers a clearer margin than a score that lands precisely on a borderline band.
CEFR-certified candidate needing to submit an IELTS score
A candidate with a DELF B2 or telc B2 who needs to provide an IELTS score for an English-speaking institution or employer can get an approximate sense of where they should land on the band scale — keeping in mind that the correspondence isn't documented with the same solidity in this direction (see the previous section).
International admissions offices and credential evaluators
Admissions staff, credential evaluation services, and language teachers who need to compare an IELTS score against a CEFR requirement (or the reverse) benefit from knowing precisely where the zones of certainty are — and where they stop.
Frequently asked questions
Is IELTS 6.5 B2 or C1?
Either is possible. IELTS itself names band 6.5 as a borderline zone between B2 and C1: many test takers at this band are C1, but a number remain just below, at B2. The score alone doesn't settle it.
What IELTS score do you need for C1?
A band of 7.0 or above corresponds fairly reliably to C1, according to IELTS. Band 6.5 remains a borderline zone with B2, and band 8.0 marks the next borderline, with C2 — so a « clean » C1 result mostly sits between 7.0 and 7.5.
Is there an exact correspondence between IELTS and the CEFR?
No, and IELTS says so explicitly: « there will not be a one-to-one correspondence between IELTS scores and CEFR levels. » It goes further, naming bands 5, 6.5, and 8 as borderline zones where it doesn't itself resolve which of two levels applies.
Does the IELTS-CEFR correspondence also apply skill by skill (reading, listening, speaking)?
No. IELTS states that the correspondence applies only to the overall band score, not to the individual Listening, Reading, Writing, and Speaking scores.
What CEFR level is an IELTS score of 5.0?
Band 5.0 is itself a borderline zone: IELTS states it « is not clear » whether it corresponds to B1 or B2. Below band 4.0, IELTS publishes no verifiable CEFR correspondence.
Who established the correspondence between IELTS and the CEFR?
IELTS itself, through its three joint owners (British Council, IDP: IELTS Australia, and Cambridge Assessment English), based on research it has carried out and documented since the 1990s. The Council of Europe, which created the CEFR, doesn't validate or certify this link — each test provider is responsible for making its own case.
Related
Sources
- IELTS. IELTS and the CEFR. Institutional document, updated periodically (no fixed publication date is shown on the page). https://ielts.org/organisations/ielts-for-organisations/compare-ielts/ielts-and-the-cefr
- IELTS. Everything you need to know about IELTS and the CEFR. https://ielts.org/news-and-insights/everything-you-need-to-know-about-ielts-and-the-cefr
- British Council (2019). IELTS Guide for Teachers. https://takeielts.britishcouncil.org/sites/default/files/ielts_guide_for_teachers.pdf
- Cambridge English / Cambridge Assessment English (October 2019). Comparing scores to IELTS: B2 First and C1 Advanced. Ref. CER/3019/V2/OCT19. https://www.cambridgeenglish.org/images/461626-cambridge-english-qualifications-comparing-scores-to-ielts.pdf
- Council of Europe. Relating Language Examinations to the Common European Framework of Reference for Languages: Learning, Teaching, Assessment (CEFR) — A Manual. https://www.coe.int/en/web/common-european-framework-reference-languages/relating-examinations-to-the-cefr
- IDP: IELTS Australia. IELTS and CEFR Levels: In-Depth Score Comparison. Used only as a cross-reference for bands without a dedicated IELTS quote. https://ielts.idp.com/canada/prepare/article-ielts-and-cefr-levels