Overview
BT Business is the enterprise and public sector division of BT Group plc (LON: BT.A), the UK's incumbent telecoms operator. The group reported revenue of £20.36 billion for the fiscal year ending March 2025 across roughly 85,300 employees. BT Business operates as one of three customer-facing units alongside Consumer and Openreach, and is the largest UK provider of managed WAN, SD-WAN, security, and fixed-line voice services to the FTSE 350 and central government.
Within network and infrastructure, BT Business offers managed MPLS, global SD-WAN built on Cisco Meraki and Versa, dedicated internet access, SASE through partnerships with Fortinet and Zscaler, hosted contact centre platforms, and on-premise LAN and Wi-Fi integration. The portfolio includes BT's own UK fibre and 5G infrastructure plus partner networks across Europe and North America. Public sector work is delivered through the Crown Commercial Service Network Services 3 framework.
BT Business is a strong fit for UK-headquartered organisations that want a single accountable carrier for connectivity and managed services, including those with extensive UK branch estates. It is less suited to buyers requiring fully vendor-neutral integration or those whose footprint is mostly outside the UK. Business adjusted revenue fell six per cent year on year in Q1 FY26, reflecting decline in traditional voice and continued migration to SD-WAN and IP services.
Services Offered
- Managed SD-WAN design, deployment, and lifecycle management
- Global MPLS and Ethernet WAN with onnet reach in 180+ countries
- SASE, SSE, and managed firewall on Fortinet, Zscaler, Cisco
- 24/7 NOC, SOC, and managed device services from UK and India
- LAN, Wi-Fi, and campus network design and installation
- Private 5G and IoT connectivity for industrial sites
- Hosted SIP trunking, unified communications, and Microsoft Teams calling
- Network resilience, dual-carrier diversity, and DR connectivity
- Compliance and assurance for UK public sector and regulated industries
- Cloud-direct connect to AWS, Azure, and Google Cloud
Typical Engagement
| Engagement Type | Model | Typical Range |
|---|---|---|
| Network assessment & design | Fixed-fee project | £80K–£600K (6–14 weeks) |
| SD-WAN rollout (50–500 sites) | Fixed-fee + per-site | £1.5M–£15M (9–24 months) |
| Multi-year managed services | Annual recurring contract | £3M–£60M/year |
| Managed security and SOC | Monthly retainer | £30K–£500K/month |
| Field engineering and staff aug | Day rate | £550–£1,200/day |
Pricing ranges verified May 2026 from public statements of work and reference checks.
Strengths
- UK market depth, including direct access to Openreach fibre, exchange estate, and last-mile engineers
- Strong public sector accreditation, including List X clearance and CCS framework presence
- Single contracting entity for network, security, voice, and mobile across a UK estate
- Established global reach through partner agreements in 180+ countries
- Mature ITIL-aligned service management with documented SLAs and dedicated service managers
- Investment in private 5G and industrial IoT for manufacturing and logistics customers
Limitations
- Pricing for managed services is rarely the lowest in competitive tenders, particularly against challenger MSPs
- Account experience varies materially between strategic and mid-market segments, with smaller customers reporting slower escalation paths
- Heavy weighting of legacy MPLS and voice in the installed base creates migration risk for buyers retiring those services
- Outside the UK and parts of Europe, delivery depends on partner networks rather than owned infrastructure
- Group-level restructuring and headcount reductions through to 2030 may affect bench depth in specific practice areas