The Infrastructure Question
Every business eventually faces this question: should we maintain our own servers, move everything to the cloud, or use a hybrid approach? The answer depends on your specific situation, and there is no universally correct choice.
Understanding the trade-offs helps you make decisions aligned with your business needs.
Understanding Your Options
On-Premises Servers
Physical servers located in your office or data centre:
How it worksYou own the hardware, host it in your space, and manage everything from power to software.
Traditional approachThis is how business IT worked for decades. Many established businesses still operate this way.
Modern on-premisesToday's on-premises can include virtualisation, modern hardware, and sophisticated management — not just old servers in a closet.
Public Cloud
Infrastructure provided by major cloud vendors (Microsoft Azure, Amazon AWS, Google Cloud):
How it worksYou rent computing resources on demand. The provider handles hardware, power, cooling, and physical security.
Consumption modelPay for what you use, scale up or down as needed.
Shared responsibilityProvider manages infrastructure; you manage your applications and data.
Hybrid Approaches
Combinations of on-premises and cloud:
Cloud extensionSome workloads in the cloud, some on-premises.
Cloud backupOn-premises systems with cloud-based backup and disaster recovery.
Burst capacityOn-premises for steady workloads, cloud for peak demand.
Evaluating On-Premises
Advantages
ControlComplete control over hardware, configuration, and data location.
Predictable costsFixed capital expenditure rather than variable operating costs.
PerformanceLocal resources with no internet dependency for internal operations.
Data sovereigntyClear understanding of where data resides.
Existing investmentMay already have infrastructure with remaining useful life.
Disadvantages
Capital requirementsSignificant upfront investment in hardware.
Maintenance burdenResponsibility for updates, repairs, and replacements.
Expertise requirementsNeed staff or partners with server management skills.
Disaster vulnerabilitySingle location creates disaster risk.
Scaling limitationsAdding capacity requires hardware procurement.
DepreciationHardware loses value and eventually needs replacement.
When On-Premises Makes Sense
Consider on-premises when:
- You have reliable power and environmental controls
- You have or can access appropriate IT expertise
- Workloads are predictable and steady
- Internet connectivity is unreliable or expensive
- Compliance requires specific data location control
- Existing infrastructure has significant remaining life
Evaluating Cloud Infrastructure
Advantages
ScalabilityAdd or remove resources in minutes, not weeks.
Reduced capitalOperating expense model instead of large upfront investment.
Provider expertiseBenefit from provider investment in hardware, security, and facilities.
Geographic distributionEasy deployment across multiple regions.
Disaster recoveryBuilt-in redundancy and recovery options.
Modern capabilitiesAccess to services (AI, analytics, etc.) impractical to build yourself.
Disadvantages
Ongoing costsMonthly bills that can grow unexpectedly.
Internet dependencyRequires reliable connectivity for access.
ComplexityCloud platforms have steep learning curves.
Vendor dependencyMoving between providers can be difficult.
Cost unpredictabilityConsumption-based billing can surprise you.
Security shared responsibilityMisconfiguration risks are your responsibility.
When Cloud Makes Sense
Consider cloud when:
- Workloads are variable or unpredictable
- You want to minimise capital expenditure
- Geographic distribution is valuable
- Modern cloud services provide competitive advantage
- Your team prefers to focus on applications, not infrastructure
- Disaster recovery is a priority
Cost Comparison
On-Premises Costs
Capital costs:
- Servers (typically refreshed every 4-5 years)
- Storage systems
- Networking equipment
- Uninterruptible power supplies
- Environmental controls (if dedicated space)
Operating costs:
- Power consumption
- Cooling costs
- Maintenance contracts
- Replacement parts
- IT staff time or managed services
Cloud Costs
ComputePay-per-use for virtual machines or containers.
StoragePay for capacity used, with different tiers and pricing.
NetworkingData transfer costs, especially egress (data leaving the cloud).
ServicesAdditional services (databases, AI, security) add to bills.
ManagementStaff time for cloud administration or managed services.
Hidden Costs
Often-overlooked costs in both models:
On-premisesPower, cooling, real estate, backup infrastructure, disaster recovery sites.
CloudEgress fees, reserved capacity waste, service sprawl, expertise development.
Realistic Comparison
Direct cost comparison is complex:
- Compare total cost of ownership, not just obvious costs
- Include staff time in both models
- Account for opportunity costs
- Consider risk and insurance implications
- Factor in growth and change over the comparison period
Migration Considerations
Moving to Cloud
If transitioning from on-premises:
Assess workloadsNot everything benefits equally from cloud migration.
Choose strategyRehost (lift and shift), refactor (optimise for cloud), or replace with SaaS.
Plan carefullyRushed migrations create problems.
Manage costsCloud costs can exceed expectations without governance.
Train staffCloud requires different skills than on-premises.
Staying On-Premises
If maintaining on-premises infrastructure:
Modernise appropriatelyVirtualisation, modern hardware, proper management.
Plan for disasterOff-site backup and recovery capabilities.
Manage lifecycleBudget for regular hardware refresh.
Consider hybridCloud backup or disaster recovery, even if primary systems stay local.
Making the Decision
Assessment Questions
Consider these factors:
1. What are your workload characteristics (steady vs. variable)?
2. How reliable is your internet connectivity?
3. What IT expertise do you have access to?
4. What are your disaster recovery requirements?
5. How important is minimising capital expenditure?
6. What compliance requirements affect data location?
7. How much does predictable vs. variable cost matter?
8. What is your growth trajectory?
Common Patterns
Patterns we often see:
Small officesCloud-first for most workloads, simple and manageable.
Larger businessesHybrid approaches, optimising for different workload types.
Specific industriesOn-premises for compliance or performance requirements.
Transition periodsGradual migration as existing infrastructure ages out.
Avoiding Common Mistakes
Assuming cloud is always cheaperIt often is not, especially for steady workloads.
Ignoring connectivity requirementsCloud is only useful if you can reach it.
Underestimating migration effortMoving existing systems takes time and expertise.
Over-engineering solutionsMatch infrastructure to actual needs, not theoretical maximums.
Forgetting about dataData migration and ongoing access costs matter.
Working with IT Partners
What to Expect
Good IT partners help you:
- Assess your specific situation objectively
- Understand trade-offs for your context
- Plan appropriate migrations if needed
- Manage ongoing operations
- Optimise costs over time
Questions to Ask
When discussing infrastructure with providers:
1. What do you recommend for my specific situation and why?
2. What are the total costs over three to five years?
3. How will you help manage ongoing costs?
4. What happens if we need to change direction?
5. How do you handle disaster recovery?
6. What is your experience with similar businesses?
Moving Forward
Infrastructure decisions should be:
- Based on your specific needs, not trends
- Informed by realistic cost comparison
- Flexible enough to adapt as needs change
- Supported by appropriate expertise
Whether you choose on-premises, cloud, or hybrid, the right infrastructure enables your business without creating unnecessary burden or cost.