Cambridge English Fined £875,000 Over IELTS Computer Marking Error

The United Kingdom’s exams regulator has issued a landmark fine of £875,000 to Cambridge English following a major failure in its automated IELTS marking system that caused tens of thousands of candidates worldwide to receive incorrect test results over a two-year period. The penalty, handed down by the Office of Qualifications and Examinations Regulation (Ofqual) , represents one of the most significant regulatory actions against a major English language testing provider in recent years.

Between August 2023 and September 2025, Cambridge English used a computer-based marking system to score the Listening and Reading components of the International English Language Testing System (IELTS) . The system was designed to automatically compare candidate answers against pre-programmed answer keys provided by human subject experts. However, Ofqual’s investigation uncovered two critical technical failures that went undetected for more than two years. The first involved corrupted answer keys: as data moved between different systems, answer keys became incorrectly ordered, meaning that some correct answers were marked as wrong, while some incorrect answers were accidentally marked as correct. The second failure related to accent and umlaut errors: the system failed to properly ignore diacritical marks (such as accents or umlauts), which is a direct violation of official IELTS marking policy. As a result, valid responses were often given zero marks. Ofqual concluded that these failures pointed to “systemic weaknesses” in Cambridge English’s approach to quality control, particularly the lack of adequate monitoring and error-detection mechanisms. In a public statement, Amanda Swann, Ofqual’s Executive Director for Delivery, said: “Tens of thousands of people took these tests with the expectation of accurate results which influence important decisions.”

The scale of the error is substantial. During the 26-month period in question, Cambridge English processed approximately 7.7 million IELTS tests. Out of these, a total of 93,865 responses were marked incorrectly. This led to 62,794 candidates receiving incorrect results for their listening and reading components. Of that number, 21,717 candidates had their overall IELTS scores revised after the errors were identified. Among those, 20,602 candidates saw their scores increase (most by 0.5 band), while 1,115 candidates received downward revisions of 0.5 band. Additionally, 2,740 candidates experienced a change in their Common European Framework of Reference for Languages (CEFR) level as a result of the corrected scores. Ofqual also confirmed that in about one-third of the incorrectly marked responses, the error did not ultimately change the candidate’s final component score or overall band. Where overall scores did change, nearly all adjustments were by 0.5 points on the IELTS 0–9 scale, with only two candidates seeing a full one-point increase after correction.

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Among those affected, 1,108 candidates had taken the Secure English Language Test (SELT) version of IELTS – the specific exam required by UK Visas and Immigration (UKVI) for visa, settlement, and citizenship applications. Ofqual confirmed that in four cases, the marking error directly impacted a candidate’s visa eligibility. In each instance, the affected test-taker was offered a free resit and subsequently passed, meeting the required language standard. Beyond the visa-related impacts, Cambridge English also received 26,246 refund requests from affected candidates, all of which were processed.

Ofqual imposed the £875,000 fine after concluding that Cambridge English had breached regulatory requirements for accuracy and public confidence. However, the regulator’s enforcement panel also considered several mitigating factors before setting the final penalty. These included the fact that Cambridge English accepted full responsibility for the breaches, entered a voluntary settlement agreement on June 1, 2026, and spent over £6 million on corrective measures, compensation, and support systems. Once the issue was discovered in September 2025, Cambridge English took a series of corrective actions. The company corrected all affected results and notified each candidate directly. It offered free resits or full refunds to all 62,794 affected candidates. It also established a 24/7 dedicated customer support hub for queries, worked with universities and immigration authorities to minimize harm to applicants, and strengthened internal safeguards and monitoring systems to prevent recurrence. In a public statement, an IELTS spokesperson said: “We apologise to those affected, and we take responsibility for the error… We worked directly with recognising organisations and relevant authorities to help mitigate any harm.”

IELTS is accepted by more than 11,000 organisations worldwide, including universities, employers, and immigration authorities. The test is jointly owned by the British Council, IDP IELTS, and Cambridge University Press & Assessment. Despite this incident, Ofqual has confirmed that Cambridge English has now implemented additional operational controls and safeguards. The regulator continues to monitor the testing system closely. For current and future test-takers, the key takeaways are that automated marking systems are not infallible – but regulators are increasingly holding providers accountable; that affected candidates received full compensation, including free resits or refunds; and that systemic improvements have been made to prevent similar errors going forward.

Ofqual’s decision to fine Cambridge English £875,000 – and to publicly detail the “systemic failures” behind the error – sends a clear message to all regulated exam providers: accuracy, monitoring, and accountability are not optional. As Amanda Swann of Ofqual stated: “We will always step in to protect the integrity of tests and maintain public confidence in regulated qualifications.” For the 62,794 candidates who received incorrect results, the correction came too late to undo stress, missed deadlines, or delayed plans. But the regulatory response and compensation package may help restore confidence in one of the world’s most widely trusted English language tests.

Cambridge English Fined £875,000 Over IELTS Computer Marking Error