Total Cost of Ownership (TCO)
20 October 2025
updated at: 6 November 2026
TCO is the full cost of a product or service over its entire period of use. A company accounts not only for the purchase price but for every additional expense: implementation, maintenance, upgrades and employee training
What is TCO (total cost of ownership)
The concept was developed by the research firm Gartner in the late 1980s. Its analysts wanted to help businesses estimate the real cost of IT systems. Executives often saw only the initial price tag and were surprised when, a year later, spending had grown two or three times.
Imagine the head of a B2B company buys a CRM system for 500,000. The budget seems settled. But a month later invoices arrive for setting up integrations, training sales managers and technical support. Six months on, the company needs extra licenses for new hires. A year later, it has to pay for a version upgrade. The real cost of ownership reaches 1.5 million.
TCO shows the whole picture. The method helps compare options and make balanced decisions. One system is cheaper to buy but expensive to maintain; another costs more upfront but saves money over three to five years.
Businesses calculate TCO for many kinds of assets: servers, software, vehicle fleets, production equipment. The method is used most often in IT, where hidden costs often make up a large share of a project's total budget.
Benefits of calculating TCO for a business
A TCO calculation gives management transparency. You see how much a project will cost over three or five years. No surprises in the form of unexpected invoices or unplanned spending.
1. Supports sound investment decisions
A CFO compares two ERP systems. The first costs 2 million, the second 3 million. At first glance the choice is obvious. But the TCO calculation shows that the cheaper system needs 800,000 a year in maintenance, while the more expensive one needs only 200,000. Over five years, the savings come to 2 million.
2. Optimizes the budget
The company plans spending several years ahead. Finance budgets not only for the server purchase but also for electricity, cooling and the administrator's salary. There is enough money for everything, not just the initial outlay.
3. Makes real needs visible
The head of IT asks for money to replace outdated workstations. The CEO hesitates: the old computers still work. The TCO calculation shows that the outdated hardware costs 50,000 a year in repairs and downtime cuts the department's productivity by 15%. New computers will pay for themselves in eighteen months.
4. Reveals hidden costs
A company rolled out a project management system. The license cost 300,000 a year. But the TCO analysis uncovered additional spending: 150,000 on training, 100,000 on customization and 80,000 on integration with other systems. The real cost of ownership is 630,000 a year.
5. Identifies unused assets
An IT infrastructure audit found twenty idle servers. The company was paying for floor space, electricity and maintenance for nothing. The TCO calculation showed that switching off the surplus equipment saves 2 million a year.
6. Shows real spending openly
Investors ask why the company spends millions on IT. A financial report with a detailed TCO calculation shows the cost structure and demonstrates that spending is justified and under control.
What TCO consists of: cost structure and components
TCO is split into two broad categories: direct and indirect costs. Direct costs are visible straight away — you receive an invoice and pay it. Indirect costs are hidden but still affect the budget.
Direct costs
- Initial investment
The company buys hardware and licenses and pays for delivery and installation. This covers not only the assets themselves but everything needed to get them running: setup, connection to corporate systems and initial configuration.
- Licenses and subscriptions
Software requires regular payments. Licensing models differ: some systems sell perpetual licenses with annual support, others work on a subscription basis. Cloud services usually charge monthly per user or per unit of resources.
- Maintenance and technical support
Hardware manufacturers charge for warranty service, software vendors for consultations and troubleshooting. Support contracts often cost a noticeable share of the license price every year. Without technical support, a company risks being left without help during a critical outage.
- Upgrades and modernization
New software versions come out and old ones lose support. Periodically, not only software but also hardware has to be upgraded — adding memory, replacing disks, increasing capacity. Vendors end support for outdated versions, forcing customers to move to new releases.
- Consumables
Printer cartridges, spare disks, cables, batteries for uninterruptible power supplies. They seem minor, but over a year they add up to a noticeable sum.
Indirect costs
- Staff salaries
System administrators, support specialists and developers spend time maintaining the infrastructure. Part of IT staff working time goes into servicing a specific system or piece of equipment. Count not the full salary but the share of time employees devote to that asset.
- Employee training
New employees need onboarding, delivered either by in-house specialists or external trainers. The more complex the system, the longer and more expensive the training.
- Downtime and lost productivity
When the system is down, employees sit idle. Even a couple of hours of downtime for a group of users leads to tangible losses. A few such incidents a year, and the losses run into the hundreds of thousands.
- Electricity and cooling
Server hardware consumes electricity around the clock. High-performance systems need effective cooling, or they overheat and fail. Energy costs grow in proportion to the amount of equipment and its performance.
- Premises
A server room takes up space, and that space costs money: rent, utilities and security. The more equipment, the more space it needs.
- Decommissioning
When equipment becomes obsolete, it has to be written off and disposed of. Dismantling, removal and electronics recycling all cost money. Migrating data to a new platform takes specialists' time.
Hidden risks
Companies often forget to account for risks that sometimes materialize and cause significant costs.
- Data loss
Backups are misconfigured and data is lost. Recovering it is expensive. Customers who leave for competitors after an outage turn into lost profit for years ahead.
- License non-compliance penalties
An audit finds unlicensed software. Penalties for each illegal copy add up, plus reputational damage and legal costs. Large vendors run audits regularly and enforce their rights.
- Vendor lock-in
The vendor has left the market or raised prices sharply, and now the company is held hostage: pay a premium or migrate to another platform at great expense. The more specialized the system, the higher the risk of lock-in.
If you are calculating the TCO of an enterprise system rather than hardware, the calculation also includes implementation, integrations, training and customization.
Calculating the total cost of ownership of IT infrastructure
A TCO calculation requires a systematic approach. The company collects data from different sources, accounts for every cost item and projects spending several years ahead.
Step 1. Define the calculation period
Choose a planning horizon — usually three to five years. A short period will not show the real picture: solutions that are expensive upfront may prove cost-effective after three years. Too long a period adds uncertainty, as technologies change and new solutions appear.
Production equipment is typically assessed over seven to ten years, IT infrastructure over three to five, and software over three years.
Step 2. Collect all cost items
Compile a complete list of expenses. Take the data from accounting, supplier contracts, equipment requests and support reports.
What to include:
- initial purchase — hardware, licenses, delivery, installation;
- annual maintenance — technical support, warranty, service contracts;
- operating expenses — electricity, internet, server room rent;
- staff — salaries of administrators, service desk staff and developers;
- training — courses, certification, onboarding of new employees;
- modernization — version upgrades, hardware upgrades;
- unforeseen costs — repairs, replacement of failed components.
Step 3. Estimate indirect costs
Indirect costs are harder to calculate: they are spread across different budget lines and often disguised as other spending. Yet indirect costs often make up a large share of total cost of ownership. Ignoring them gives a distorted picture of real spending.
Step 4. Forecast future spending
Technologies age, licenses get more expensive, inflation erodes money. Allow for your vendors' price-escalation clauses and local inflation.
Plan for business growth. If the company grows by 20% a year, in three years it will need about 70% more workstations, licenses and capacity.
Step 5. Apply the formula
The basic TCO formula looks like this:
Example calculation for a cloud CRM over three years (figures are illustrative and given without a currency):
- initial investment: 500,000 (implementation, data migration, training);
- annual subscription: 600,000;
- technical support: 200,000 a year;
- training new employees: 100,000 a year;
- administrator time (20% of working hours): 432,000 a year.
Step 6. Compare the options
Calculate TCO for each solution and compare them. Running your own infrastructure involves large upfront costs and ongoing spending on hardware, electricity and maintenance. Cloud solutions avoid these costs: the company pays only for the resources it actually uses and scales easily as needed.
Build charts with years on the horizontal axis and cumulative spending on the vertical axis. The point where the curves cross is the moment one solution becomes more cost-effective than the other.
Step 7. Consider non-financial factors
TCO shows cost but not the whole picture. Add qualitative criteria:
- reliability — how often the system goes down and how quickly it recovers;
- flexibility — whether it is easy to scale and add functionality;
- security — how data is protected and whether the solution meets regulatory requirements;
- usability — how easy it is to use and how much training it takes;
- risks — what happens if the vendor leaves the market or doubles its prices.
Step 8. Document the calculation
Record the results in a table or report. List all assumptions, data sources and the calculation method. A year later, return to the document, check forecasts against reality and adjust the model.
Management sees the rationale for the choice, finance understands how to plan the budget, and procurement gets arguments for negotiating with suppliers.
Total cost of ownership calculation example
A mid-sized company is choosing between two ways to run its IT infrastructure: buying its own servers or renting cloud capacity. Let us look at a detailed five-year TCO calculation for each option. All figures are illustrative and given without a currency.
Option 1. On-premises server infrastructure
Initial investment
The company needs servers to host corporate applications, databases and file storage. Hardware purchase prices:
- four physical servers — 3,200,000;
- network equipment (switches, routers) — 800,000;
- storage systems — 1,500,000;
- uninterruptible power supplies — 400,000;
- racks and cabling — 300,000.
Total hardware purchase: 6,200,000
Additional start-up costs:
- delivery and installation — 200,000;
- hypervisor and system software licenses — 500,000;
- implementation and configuration — 800,000.
Total initial costs: 7,700,000
Annual operating expenses
Running the infrastructure requires ongoing investment:
- server room rent — 1,200,000;
- electricity — 1,314,000;
- cooling and ventilation — 350,000;
- hardware maintenance — 450,000;
- salaries of two system administrators — 4,320,000;
- staff training and certification — 200,000;
- software license renewals — 300,000;
- backup and failure protection — 180,000.
Annual operating expenses: 8,314,000
Modernization and replacement
Hardware ages and needs upgrading:
- component replacement in year three — 1,200,000;
- storage upgrade in year five — 800,000.
Decommissioning
Dismantling, disposal and data migration — 400,000.
Five-year TCO calculation:
Option 2. Cloud infrastructure
Initial investment
There is no physical hardware to buy. Start-up costs are minimal:
- connecting and configuring the cloud infrastructure — 300,000;
- migrating data from the current system — 500,000;
- training employees to work with cloud services — 200,000.
Total initial costs: 1,000,000
Annual operating expenses
The cloud provider charges for the capacity rented:
- virtual servers (equivalent to four physical ones) — 2,880,000;
- cloud data storage — 960,000;
- backup and protection — 480,000;
- provider technical support — 600,000;
- salary of one cloud administrator — 2,160,000;
- training and certification — 150,000.
Annual operating expenses: 7,230,000
Modernization
The cloud provider updates the infrastructure automatically. The company pays only for additional resources as the business grows. Assume capacity consumption grows by 10% each year:
- year two: 7,230,000 × 1.1 = 7,953,000;
- year three: 7,953,000 × 1.1 = 8,748,300;
- year four: 8,748,300 × 1.1 = 9,623,130;
- year five: 9,623,130 × 1.1 = 10,585,443.
Decommissioning
Migration to another provider or to on-premises infrastructure — 600,000.
Five-year TCO calculation:
Comparing the options
| Metric | On-premises infrastructure | Cloud |
|---|---|---|
| Initial investment | 7,700,000 | 1,000,000 |
| Operating expenses (5 years) | 41,570,000 | 44,139,873 |
| Modernization | 2,000,000 | 0 |
| Decommissioning | 400,000 | 600,000 |
| 5-year TCO | 51,670,000 | 45,739,873 |
The cloud option saves almost 6 million over five years. On-premises infrastructure requires larger upfront investment and high ongoing costs for the server room, electricity and staff. The cloud offers flexibility: the company pays only for the resources it uses and scales as it grows.
But the numbers do not tell the whole story. On-premises infrastructure gives full control over data, does not depend on external providers and protects against rising cloud prices. The cloud reduces the risk of downtime but creates dependence on the provider and requires a stable internet connection.
The right choice depends on the company's strategy, growth rate and data security requirements. TCO provides an objective basis for the decision, but the final choice also takes qualitative factors into account.
Common mistakes in calculating TCO
Companies keep making the same mistakes when calculating total cost of ownership. These errors distort the picture and lead to poor decisions and unexpected spending.
1. Ignoring indirect costs
Managers count only the obvious costs — purchase, licenses, technical support. They forget administrators' salaries, lost productivity and staff training. Indirect costs often make up a large share of TCO but stay out of sight.
A company buys a cheap system and celebrates the savings. A year later it turns out that support takes three times more effort than planned. Employees keep contacting the service desk, waiting for answers and sitting idle. The real cost of ownership ends up higher than that of a pricier competitor with a well-designed interface.
2. Choosing too short a calculation period
The CIO calculates TCO for one or two years, sees that one option is cheaper and makes a decision. But after three years costs change, and the alternative would have paid off. A short planning horizon hides the long-term benefits of capital investment.
3. Underestimating growth and scaling
Procurement calculates TCO based on current needs. It does not account for the company growing, the number of users increasing and data volumes expanding. In a year or two the system is overloaded and needs urgent modernization. Costs overrun the budget.
A solution looks cost-effective for a small number of users. But licenses are sold in bundles. As the company grows, it has to buy a larger bundle. The real cost rises in steps rather than growing smoothly with the business.
4. Forgetting about decommissioning
Managers plan the purchase, installation and operation. They forget that at the end of the lifecycle equipment will have to be dismantled and disposed of, and data migrated to a new platform.
Old hardware cannot simply be thrown away. Data has to be wiped with dedicated tools, the equipment taken for recycling and disposal paid for. Retiring software requires exporting data, training staff on the new system and running both in parallel. These costs are often noticeable, yet they are remembered only at the last moment.
5. Not accounting for risks
The CFO calculates the average cost with no reserves for force majeure. No money is set aside for unplanned repairs, penalties or disaster recovery.
The budget assumes a minimum of incidents, but serious failures can happen: hardware breaks down, data gets corrupted, cyberattacks occur. Recovery is expensive. TCO jumps significantly, and the company is not prepared for the spending.
6. Comparing options that are not comparable
Procurement compares the basic edition of one system with the full version of another, or a solution with redundancy and 24/7 support against one without fault tolerance. Comparing different service levels produces a meaningless result.
7. Ignoring training and adoption
A company rolls out a new system. It counts only licenses and technical support and forgets that employees need to learn the tool.
In the first months productivity drops: people get used to the system, make mistakes and complete tasks slowly. Training, consultants and time for adoption are needed. Depending on team size, the losses can be substantial, but they never make it into the TCO calculation.
8. Using outdated data
An analyst takes last year's prices for electricity, salaries and licenses, even though everything has become more expensive over the year. The TCO calculation is understated and the budget does not match reality.
Service rates change every year. Relying on old data distorts the forecast and leads to a funding shortfall.
9. Not documenting assumptions
An analyst calculates TCO and makes dozens of assumptions: how much time maintenance takes, how often hardware fails, what growth to expect. A year later nobody remembers which figures were used and why.
10. Ignoring dependencies on other systems
Procurement assesses the cost of owning a new system in isolation. It does not consider that integrations with other applications will need rework, databases will need updating and business processes will have to change.
Replacing one infrastructure element triggers a chain of changes. New hardware requires upgrades to adjacent systems. Updating one component forces changes to related applications. These secondary costs often increase TCO noticeably but go unnoticed in the initial estimate.
Summary
- TCO shows the real cost of ownership — the method accounts not only for the purchase price but for all costs over the entire period of use: implementation, maintenance, staff training, modernization and decommissioning.
- A TCO calculation supports informed decisions — the company compares options over a three-to-five-year horizon, sees hidden costs, optimizes the budget and justifies its choice to management with concrete figures.
- TCO includes direct and indirect costs — direct costs cover purchase, licenses, technical support and modernization; indirect costs cover staff salaries, training, downtime, electricity and premises.
- The calculation requires a systematic approach — define the ownership period, collect all cost items, estimate indirect costs, forecast business growth and account for risks to get an objective picture.
- Automation makes calculation and control easier — IT asset management platforms such as SimpleOne ITAM help collect cost data across the entire lifecycle, plan budgets and avoid common mistakes in estimating cost of ownership.