Insights

Cloud Readiness Assessment: What It Is and Why Your Organisation Needs One

Published 12 April 2026 · 6 min read

Most organisations know they need to move to the cloud. Fewer know exactly what that involves, what it will cost, or where to start. A cloud readiness assessment answers all three questions before you commit budget to a full migration programme.

What Is a Cloud Readiness Assessment?

A cloud readiness assessment is a structured evaluation of your existing IT systems, applications, and infrastructure to determine their suitability for migration to cloud platforms like AWS, Azure, or Google Cloud.

It produces a clear picture of where you are today, what needs to change, and a prioritised roadmap for getting there. Think of it as the due diligence phase before a major investment — you wouldn't buy a building without a survey, and you shouldn't start a cloud migration without an assessment.

What Does It Deliver?

A thorough cloud readiness assessment typically produces:

1. System inventory: A complete catalogue of your applications, databases, servers, and infrastructure — including the ones that IT forgot about.
2. Dependency mapping: Which systems talk to which. This is critical because migrating one application often affects five others.
3. Application classification: Each application is categorised using the 6Rs framework — Rehost (lift and shift), Replatform (minor changes), Refactor (rebuild), Repurchase (replace with SaaS), Retire (switch off), or Retain (leave alone).
4. Risk register: What could go wrong, how likely it is, and what the impact would be. This feeds directly into your business case and governance framework.
5. Cost model: Estimated cloud running costs compared to your current infrastructure spend. This is where the business case lives or dies.
6. Migration roadmap: A sequenced plan showing which applications to move first, in what order, and over what timeline.

Why Public Sector Organisations Need One

Public sector cloud migrations carry specific challenges that make assessment even more important:

• Legacy complexity: Many government departments run systems that are 10-20 years old, with limited documentation and tribal knowledge held by a small number of people.
• Security classification: Data handling requirements (OFFICIAL, OFFICIAL-SENSITIVE, SECRET) determine which cloud services and regions you can use.
• Compliance requirements: NCSC Cloud Security Principles, Cyber Essentials, and department-specific security standards all need to be factored into the target architecture.
• Budget cycles: Public sector budgets are annual. A migration roadmap needs to align with financial year planning, not just technical sequencing.
• Governance: Spend controls, business case approvals, and programme board oversight all require the kind of structured evidence an assessment produces.

What Does the Process Look Like?

A typical assessment runs over 1-2 weeks and follows this pattern:

• Week 1, Days 1-2: Discovery workshops with IT teams. Gather existing documentation, architecture diagrams, and system lists. Access to AWS accounts or on-premise infrastructure for automated scanning.
• Week 1, Days 3-4: Automated analysis — codebase scanning, dependency mapping, infrastructure auditing. AI-augmented tooling accelerates this significantly compared to manual approaches.
• Week 1, Day 5 / Week 2: Analysis, classification, risk assessment, and roadmap development. Draft report production.
• Final day: Executive presentation — a 1-hour walkthrough of findings, recommendations, and next steps with your leadership team.

How Much Does It Cost?

A cloud readiness assessment from a specialist consultancy typically costs between £4,500 and £15,000 depending on the size and complexity of your estate. For organisations with fewer than 50 applications, expect the lower end. For larger estates with multiple data centres or complex legacy systems, expect the higher end.

This is a fraction of the cost of a migration programme (which can run into hundreds of thousands or millions). The assessment ensures you spend that larger budget wisely.

What Happens After?

The assessment gives you everything you need to make an informed decision:

• If the business case is strong: You have a roadmap, cost model, and risk register ready to take to your programme board for approval.
• If it's not the right time: You know exactly why, and what would need to change. No budget wasted on a premature migration.
• Either way: You have a documented, evidence-based position that satisfies governance requirements.

Get Started

Gosforth Digital delivers cloud readiness assessments for UK public sector and enterprise organisations. We combine hands-on AWS and Terraform expertise with AI-augmented analysis to deliver thorough assessments in compressed timelines.

SC security clearance held. Available for OFFICIAL-SENSITIVE and SECRET-rated environments.

Book a free 30-minute discovery call to discuss your situation.