Lift-and-Shift vs Cloud Modernisation Services: Which Gives Better ROI?

Lift-and-shift usually gives the better short-term ROI, while cloud modernisation usually gives the better long-term ROI. Lift-and-shift needs fewer changes, costs less upfront and gets you out of the data centre faster. Modernisation costs more at the start but delivers better scalability and lower operating effort over time.

The right choice depends on the workload, your business goals, technical debt, your migration deadline and how long the application will stay in use. If you would rather have a workload-by-workload recommendation than read on, talk to our cloud team.

Quick Answer

Choose lift-and-shift when you must move quickly, with minimal risk and a small upfront investment. Choose cloud modernisation when the application is strategic and will benefit from managed services, automation, elastic scaling and cloud-native architecture. For most organisations, the best return comes from combining both, workload by workload, which is the approach behind our cloud migration services.

TL;DR

• Lift-and-shift: lower upfront cost and faster migration.
• Cloud modernisation: higher initial investment, greater optimisation potential.
• Rehosting does not remove legacy architecture or technical debt.
• Modernisation can improve scalability, agility, reliability and operational efficiency.
• The highest-return strategy is often to rehost suitable workloads and modernise selectively where the business case is clear.

Not sure which workloads belong where? Request a cloud assessment and get a rehost, replatform, refactor or retire recommendation for each application.

What Is Lift-and-Shift Cloud Migration?

Lift-and-shift, also called rehosting, moves an existing workload to cloud infrastructure with little or no change to its architecture. Virtual machines, applications, operating systems and data move from their current location to a platform such as Amazon Web Services (AWS), Microsoft Azure or Google Cloud, without being redesigned.

Google Cloud describes rehosting as moving applications with minimal modification while keeping almost the same software configuration as before.

When Does Lift-and-Shift Make Sense?

Lift-and-shift works best when:

• The data centre contract is about to end.
• Operating system or hardware is reaching end of life.
• The migration must happen quickly.
• The application has a short remaining lifecycle.
• Rewriting the application would give a low return.
• You prefer to migrate first and optimise afterwards.

AWS lists rehosting among its seven common migration strategies, alongside replatforming, refactoring, repurchasing, retiring, retaining and relocating. If you are planning a move to AWS, see our AWS services. For a broader view of platforms and options, see our public cloud services.

What Are Cloud Modernisation Services?

Cloud modernisation services improve existing applications, or rebuild them, so they use cloud capabilities fully instead of simply running the old architecture somewhere else.

Definition: Cloud modernisation means changing applications, infrastructure, data platforms or operating models to use cloud capabilities more effectively.

Modernisation can include:

• Moving from self-managed virtual machines to managed services.
• Modifying application code.
• Re-platforming database systems.
• Containerising applications.
• Adding APIs.
• Adopting serverless technologies.
• Using Infrastructure as Code.
• Breaking monolithic applications into services.

Microsoft divides modernisation into replatforming, refactoring and rearchitecting. Replatforming involves minor code changes, while refactoring and rearchitecting progressively reshape the application. Automating releases is a large part of this work, and our DevOps services cover CI/CD, Infrastructure as Code and release automation.

Lift-and-Shift vs Cloud Modernisation Services

The core difference: lift-and-shift changes where an application runs, while modernisation can change how it operates.

See where your applications fall on this table. Speak to a cloud expert and we will map your workloads to the right strategy.

Which Gives Better ROI?

Lift-and-shift usually wins short-term ROI. Modernisation can produce better total ROI when an application stays strategically important for years.

Do not measure ROI as only:

Cloud savings - migration cost

A stronger calculation considers:

ROI = financial savings + productivity gains + avoided infrastructure costs + faster delivery + reliability gains - migration and operating costs

Short-Term ROI: Lift-and-Shift Wins

A business facing an urgent data centre exit can gain more from rehosting, because applications move quickly without expensive redevelopment. AWS notes that rehosting is faster and less disruptive, which suits tight timelines. Pair it with a tested backup and disaster recovery plan so the fast move does not add risk.

Long-Term ROI: Modernisation Often Wins

Moving an inefficient architecture to the cloud does not remove its technical debt. Modernisation can reduce infrastructure management, automate operations, improve scalability and speed up development.

This matters because cloud spend is hard to control. Flexera's State of the Cloud survey reports that cost management is a top challenge for most organisations and that a significant share of IaaS and PaaS spend is wasted. [Editor: confirm the exact 2026 figures (85% and 29% in the draft) against the Flexera report before publishing.] Our cloud cost optimisation services address this with right-sizing, governance and ongoing cost reviews.

Modernisation does not guarantee savings, though. Poor architecture and uncontrolled cloud usage can raise costs.

Overspending in the cloud already? Ask for a cloud cost review and find out where the waste is before you decide to rehost or modernise.

Benefits of Lift-and-Shift

The main advantage is speed with limited disruption to the application. Key benefits:

• Faster migration.
• Lower upfront engineering cost.
• Reduced redevelopment risk.
• Easier migration of legacy workloads.
• Faster exit from ageing infrastructure.
• Minimal changes to application behaviour.

Limitations of Lift-and-Shift

Rehosting moves existing problems instead of solving them:

• Technical debt stays.
• Over-provisioned applications stay over-provisioned.
• Cloud-native services go unused.
• Licensing costs may remain high.
• Scalability limits can persist.
• Long-term costs may be higher than expected.

Google Cloud notes that rehosting does not use the full capabilities of the public cloud.

Benefits of Cloud Modernisation Services

Modernisation aims to extract more business value from your cloud investment. Potential benefits:

• Better application scalability.
• Less infrastructure administration.
• Faster software releases.
• Greater automation.
• Improved resilience.
• Better observability.
• Easier integration with data and AI services. Modernised applications are better positioned to feed data engineering and data analytics workloads.
• Reduced technical debt.
• Greater developer productivity.

Limitations of Cloud Modernisation

Modernisation carries more risk because teams often underestimate application complexity, dependencies and the skills required. Main issues:

• Higher upfront costs.
• Longer implementation timelines.
• Need for cloud engineering skills.
• More testing.
• Application dependencies.
• Possible business interruption.
• Unnecessarily complex architecture.

Modernisation should therefore be treated as a business-led programme with clear goals, not as a technology experiment.

How to Choose the Right Cloud Strategy

Choose the strategy for each workload, not once for the whole application portfolio.

1. Assess the application. Document its architecture, dependencies, utilisation, security requirements, technical debt and business importance. Include security from the start: our DevSecOps and VAPT services help you find risks before they move to the cloud.
2. Define the business objective. Is the priority data centre exit, cost reduction, faster product delivery, scalability, reliability, AI readiness or technical debt reduction?
3. Estimate the remaining application life. An application due for replacement in two years may not justify a major refactoring project.
4. Compare total cost. Weigh migration costs against projected infrastructure, licensing, support, engineering and operational expenses.
5. Select the strategy. Use rehost for speed, replatform for targeted optimisation, and refactor or rearchitect only where the change has a measurable business value.

Want this assessment done for you? Book a consultation with our cloud team and leave with a workload-by-workload migration plan.

Common Cloud Migration Mistakes

Many teams assume that moving to the cloud automatically delivers a return. Avoid these mistakes:

• Migrating applications that are no longer in use.
• Rehosting everything, including large estates that need optimisation.
• Modernising every workload.
• Ignoring application dependencies.
• Counting only infrastructure savings.
• Postponing FinOps.
• Building microservices without real demand.

Best Practices for Better Cloud ROI

Cloud ROI improves when migration, modernisation, governance and cost optimisation work together. Follow these practices:

• Baseline performance and costs before migration.
• Retire applications that no longer provide value.
• Right-size infrastructure before and after migration.
• Modernise with caution, one workload at a time.
• Put automated visibility and governance in place.
• Set business KPIs before modernisation begins.
• Review the cloud estate regularly. Our Happy Cloud and cloud computing services support this ongoing work.

The FinOps Foundation's annual State of FinOps survey shows that FinOps teams continue to focus on workload optimisation. [Editor: add the exact 2025 finding and link the source.]

Expert Tip: Do Not Treat This as an Either-Or Decision

A phased strategy often delivers better risk-adjusted ROI than choosing one approach for every workload:

1. Phase 1: Retire unnecessary applications.
2. Phase 2: Rehost workloads that must move quickly.
3. Phase 3: Replatform applications with obvious managed-service opportunities.
4. Phase 4: Refactor strategically important applications where agility, scalability or operating cost justifies the investment.

AWS guidance similarly notes that large migrations may rehost or replatform first and modernise selected workloads afterwards, because refactoring everything during migration adds substantial complexity.

Real-World Example

Imagine a company with 50 applications in an ageing data centre.

Their payroll application works well and is due for replacement in three years. A full overhaul would add little value, so rehosting is the right choice.

Their commerce platform is different. It has unpredictable demand and frequent releases. Modernising it with managed databases, automated deployment, elastic infrastructure and better observability delivers long-term value.

The company benefits from using both approaches, each where it fits.

Have a portfolio like this? Tell us about your applications and we will recommend what to rehost, modernise, retire or keep.

Key Takeaways

• Lift-and-shift prioritises speed and lower initial investment.
• Cloud modernisation prioritises long-term efficiency, agility and scalability.
• Neither approach guarantees cost savings.
• Application lifespan and business importance strongly influence ROI.
• A mixed migration and modernisation strategy is often more practical than a single approach.

Frequently Asked Questions

1. Is lift-and-shift cheaper than cloud modernisation?

Usually yes at first, because it needs less redevelopment and recoding. Over time, ongoing cloud running costs can change the picture, so compare total cost, not just migration cost. A cloud cost optimisation review helps with that.

2. Is lift-and-shift the same as rehosting?

Yes. Rehosting is generally treated as lift-and-shift, because applications move to the cloud with little modification.

3. Does cloud modernisation reduce costs?

It can reduce platform and operating costs, but savings depend on architecture, usage patterns, governance and the quality of implementation.

4. What is the biggest disadvantage of lift-and-shift?

Technical debt and inefficient architecture move to the cloud along with the application.

5. What is replatforming?

Replatforming makes limited changes to an application to gain cloud benefits. For example, you might move a self-managed database to a managed database service.

6. Should every legacy application be modernised?

No. Applications nearing retirement or with limited strategic value may not justify the investment.

7. Can businesses modernise after lift-and-shift?

Yes. Many organisations migrate first and modernise selected applications later. Our cloud migration team can plan both stages together.

8. How should cloud migration ROI be measured?

Measure infrastructure savings against migration costs, and add engineering productivity, operational efficiency, reliability, scalability, licensing costs and business outcomes.

Conclusion

Lift-and-shift and cloud modernisation solve different business problems. Lift-and-shift suits companies that must migrate quickly without a large upfront investment. Cloud modernisation costs more in time and money, but it can deliver significantly higher long-term ROI through scalability, innovation, lower technical debt and faster deployment.

The best option is rarely to rehost or modernise everything. Assess each workload and decide based on its value, lifespan and risk.

Ready to Choose the Right Cloud Strategy?

A structured cloud assessment shows which applications to move as they are, which to rework and which to retire, so your plan rests on ROI numbers, not guesswork.

• Talk to our cloud team
• Request a cloud assessment

BM Infotrade also supports businesses abroad: see our cloud computing services in the USA, UAE and Australia.

Related Services

• Cloud Migration
• Cloud Cost Optimization
• DevOps Services
• Backup and Disaster Recovery
• Amazon Web Services
• Cloud Computing