UK firms face quantum disruption as Q-Day may arrive by 2029

An EY survey of UK executives found nearly nine in ten expect quantum computing to disrupt their sector within four years. The consultancy reported that many firms are assessing uses but are cautious about near-term readiness.

The survey identified finance and automotive among the sectors testing practical quantum applications. Banks and payments firms are exploring systems to detect and prevent fraud and money laundering by about 2030. Automakers are trialing quantum-assisted methods for electric vehicle battery development and traffic optimization.

EY reported that 35% of UK organisations have made quantum computing a strategic priority for the next five years. The figure rises to 67% in financial services and falls to 17% in real estate, hospitality and construction. The survey also found 59% of business leaders do not expect quantum to play a significant role in core operations before 2030, and 13% plan to recruit specialist talent within the next two years.

Respondents identified several barriers to adoption. Eight in ten flagged the complexity of quantum technology, 66% cited market uncertainty, and 60% pointed to integration challenges with existing systems. Talent shortages were noted by 47%. Around four in five respondents highlighted risks linked to outdated IT infrastructure and meeting future regulatory requirements related to quantum capabilities.

Piers Clinton-Tarestad, technology risk partner at EY UK, noted, ‘Our latest report shows that, while UK businesses are continuing to invest and evaluate the impact of quantum computing, expectations of its maturity remain cautious.’ He advised firms to start by identifying ‘one or two practical ways in which quantum can be used, linked to existing pain points,’ and to appoint a senior sponsor to coordinate efforts. He added, ‘In the same way that an orchestra needs a conductor, effective quantum implementation needs a senior sponsor within a business with cross-functional oversight to coordinate efforts, secure resources, and help ensure quantum readiness becomes part of broader digital transformation plans.’

Separately, Google revised its estimate for Q-Day to 2029, citing advances in quantum hardware and error correction and warning that most organisations are not ready for the implications for encryption and cybersecurity.

Analysis from quantum firm QuEra found mixed budget expectations: 44% of enterprises expect quantum spending to increase in the year ahead, 46% expect budgets to remain flat and 10% anticipate cuts. QuEra described the market shifting from ‘hype-driven investment’ to a ‘proof-driven discipline,’ with companies seeking clear evidence of value before committing funds.

Historically, many estimates placed Q-Day in the mid-2030s. Recent timeline revisions and the survey data show varied timelines and readiness levels across UK businesses.