Summary

• The Home Office has opened market engagement for Atlas & Immigration Caseworking, valued at £280m excluding VAT and £336m including VAT.
• The future procurement is intended to replace two incumbent contracts covering asylum and non-asylum Atlas caseworking services.
• The programme is a high-risk public-sector technology story because immigration casework depends on data quality, resilience, supplier accountability, and service integration.

The Home Office has begun market engagement for a major Atlas & Immigration Caseworking contract, reopening the supplier question around one of the UK government’s most operationally sensitive digital systems.

The notice values the opportunity at £280m excluding VAT, or £336m including VAT. It is intended to inform procurement strategy and does not yet constitute a call for competition. The Home Office expects to gather market feedback through June and July 2026, with a possible second phase of one-to-one market insights between July and September.

Atlas is the Home Office’s business-critical immigration caseworking system. It is used by caseworkers to process visa and asylum applications and provides operational functionality for Border Force and Immigration Enforcement. The system requires 24/7 availability, with ongoing updates and enhancements to support national priorities and continuous improvement in caseworking capability.

The future procurement is intended to replace two incumbent contracts: Atlas Caseworking Asylum and Atlas Caseworking Non-Asylum. The notice says those services provide development and Level 3 support for the Atlas platform, described as a containerised open-source Java microservice application deployed into AWS. It orchestrates workflow through business process management processes triggered by events, using agile release trains that group microservices for release.

The Home Office is seeking suppliers with experience managing complex solutions in large agile product portfolios, working in multi-supplier ecosystems, supporting government applications, scaling development capacity, and handling frequent releases. The notice says there have been more than 2,500 code releases across Atlas each year since 2021.

That release volume gives a useful sense of the operational challenge. Immigration caseworking is not a static back-office function. Policy changes, court outcomes, global crises, application surges, security requirements, and service changes all feed into the systems used by caseworkers. A supplier model for Atlas has to support continuous change without weakening resilience or data integrity.

The procurement also lands after years of scrutiny around immigration systems, data quality, and casework efficiency. A Home Office Digital blog post in late 2025 said the department had fully transitioned to Atlas for managing immigration and asylum applications and decommissioned the legacy Case Information Database. It said Atlas digitises caseworking, reduces paper processes, integrates with customer-facing application portals, and frees staff from repetitive administrative tasks.

Those gains sit alongside continuing concerns about the wider asylum and immigration system. National Audit Office analysis has previously highlighted long-standing problems with poor-quality data, workarounds, interoperability, and the difficulty of creating a single reliable record for each person seeking asylum. Even where Atlas has replaced older systems, the surrounding public-service challenge remains one of data quality, process design, workforce capacity, and integration with other bodies.

The supplier accountability language in the market-engagement notice is therefore significant. Large public-sector technology contracts can fail not only because software is poor, but because accountability is fragmented across departments, vendors, integrators, support teams, and policy owners. The Home Office says the objective is not merely to re-procure services, but to evolve and enhance the operating model with greater emphasis on supplier accountability, collaboration, and strategic partnership.

Suppliers will see a large, long-running, high-profile opportunity, but also one exposed to political pressure, legal consequences, security requirements, and public scrutiny. Any contract supporting Atlas will need to combine agile development with disciplined service management, auditability, onshore security requirements, and the ability to respond to policy change without creating technical debt.

Replacing a legacy system is only the first phase of government technology reform. The harder question is whether the new platform can be operated, improved, governed, and integrated well enough to change outcomes for staff and users. Atlas sits behind immigration decisions that affect individuals, public expenditure, border operations, and public confidence. The next supplier model will be judged by service resilience and data quality, not procurement language.