IT Department Budget Structure: 2026 Benchmarks by Category
How a well-structured IT department budget allocates across five core categories, with recommended percentages, what is included, warning signs, and optimisation opportunities.
IT department budget structure (2026): the short answer
The one measured category benchmark you can read for free is security: 10.9% of IT spend in 2025, down from 11.9% in 2024 (IANS Research / Artico Search Security Budget Benchmark, 587 CISOs, August 2025).
For the full structure, this site uses a five-category planning model: personnel 28-32%, software and SaaS 26-30%, infrastructure 20-24%, security 10-14%, and support and maintenance 7-10%. Use it as a starting split to compare against your own budget, not as a measured average.
28-32%
IT Personnel
26-30%
Software and SaaS
20-24%
Infrastructure
10-14%
Security
7-10%
Support and Maintenance
Percentages shift with company size, industry, and technology-estate age: see the by company size and by industry views, or the full benchmark matrix. The category cards below give what each covers and where the spend goes wrong.
The five-category split is this site's planning model, not published benchmark data. No free public source publishes a current breakdown of IT budgets by these categories; Gartner's IT Key Metrics Data does and is a paid product we do not hold. The one measured figure inside it is security: 10.9% of IT spend in 2025, down from 11.9% the year before (IANS Research / Artico Search Security Budget Benchmark, 587 CISOs, August 2025), inside the model's 10-14% security band.
Sources: Deloitte Global Technology Leadership Study for the cross-industry percentage of revenue, Flexera State of Tech Spend Report for the by-industry figures, and Gartner's published forecast for worldwide IT spending totals. Company-size, per-employee and five-category allocation figures are this site's model, not published data. Gartner IT Key Metrics Data, Avasant and IDC publish deeper benchmarks; those are paid products we do not hold and do not reproduce. Compiled August 2026. Full methodology and source list.
Planning Model Allocation
IT Personnel
Model band
28-32%
The largest single category in most IT budgets. Covers salaries, benefits, contractors, and managed service provider fees. This is where strategic capability resides: underinvesting creates skills gaps; over-investing without the right roles creates waste.
Includes
- +Internal IT staff salaries and benefits
- +Contractors and managed service providers
- +Training and certifications
- +IT recruitment costs
Red Flags
- !Single person responsible for multiple critical functions (key person risk)
- !IT staff spending most of their time on reactive support tickets
- !No training budget for certification renewal
Optimisation
Audit where IT staff time actually goes before adding headcount. Repetitive tickets (password resets, onboarding, patching) are the first candidates for automation.
Software and SaaS
Model band
26-30%
Business applications, developer tools and productivity suites. SaaS spend tends to creep through team-level purchases, auto-renewals and shadow IT, so visibility is the first problem to solve.
Includes
- +Business SaaS applications (CRM, HR, finance, project management)
- +Developer tools and CI/CD platforms
- +Productivity and collaboration suites
- +Data, analytics, and BI platforms
Red Flags
- !No central inventory of all SaaS subscriptions
- !Multiple overlapping tools serving the same function
- !Auto-renewals for underused or abandoned licences
Optimisation
Keep one inventory of every subscription with an owner and a renewal date, compare assigned seats with active users, and review each contract 90 days before renewal.
Infrastructure
Model band
20-24%
Cloud infrastructure, data centres, networking, and hardware. Cloud infrastructure is the fastest-growing part of worldwide IT spend: Gartner's October 2026 forecast puts infrastructure-as-a-service at $292 billion in 2026, up 31.3%, and $367 billion in 2027.
Includes
- +Cloud provider spend (AWS, Azure, GCP)
- +On-premise servers and data centre costs
- +Network and connectivity costs
- +Endpoint hardware (laptops, mobile devices)
Red Flags
- !Cloud spend growing faster than headcount or revenue
- !No cloud cost visibility or FinOps tooling
- !Significant over-provisioned compute or storage
Optimisation
Commit steady-state workloads to reserved capacity or savings plans, rightsize idle compute, and switch off non-production environments out of hours. The cloud spending page lists the discounts the providers publish.
Security
Model band
10-14%
The one category with a measured benchmark. Security averaged 10.9% of IT spend in 2025, down from 11.9% in 2024 (IANS Research / Artico Search Security Budget Benchmark, 587 CISOs), the first fall in five years, as IT budgets grew faster than security budgets.
Includes
- +Security tools and platforms (EDR, SIEM, WAF, CASB)
- +Penetration testing and security assessments
- +Security awareness training for all staff
- +Cyber insurance premiums
Red Flags
- !Security spend well below the measured 10.9% average with no documented reason
- !No annual penetration test or security assessment
- !No security awareness training programme
Optimisation
Map every security tool to the controls it covers. Overlapping point products are the usual place to consolidate.
Support and Maintenance
Model band
7-10%
Vendor support contracts, hardware maintenance, and break-fix costs. This category tends to grow as the technology estate ages, and legacy systems can push it well above the model band, crowding out new investment.
Includes
- +Software vendor support and maintenance contracts
- +Hardware maintenance and extended warranties
- +Break-fix support for on-premise equipment
- +Legacy system maintenance costs
Red Flags
- !Support costs growing as a percentage of IT budget year-on-year
- !Legacy systems with vendor support end-of-life approaching
- !No plan to retire or replace high-maintenance systems
Optimisation
List the systems with the highest support cost per user and the nearest end-of-support date; those are the retirement candidates that free budget for new work.
Cybersecurity Budget Guide
Detailed security allocation benchmarks and mini calculator.
Cloud Spending Benchmarks
Gartner's cloud market figures and the discounts providers publish.
IT Staffing Cost Benchmarks
Team sizing by company size and the build vs outsource decision.
Frequently Asked Questions
What is the typical IT department budget structure in 2026?
What are the IT budget structure benchmarks for 2026?
How should an IT budget be broken down?
What is the biggest IT budget category?
Is 10% of IT budget enough for cybersecurity?
What percentage of IT budget should go to cloud?
See your category-level breakdown
The calculator gives you a dollar amount for each category based on your revenue, headcount, and industry.
Use the IT Budget Calculator