What the two terms actually mean
Capital expenditure, or capex, is spending on something the business owns and uses over several years, such as laptops, a server or network equipment. It shows up as an asset on the balance sheet and its cost is generally spread over its useful life through depreciation. Operating expenditure, or opex, is spending that keeps the business running day to day, such as subscriptions, support contracts, internet and rental payments.
IT has moved steadily from capex towards opex over the last decade. Email, file storage and accounting software that once ran on an office server are now monthly subscriptions. Even hardware can be leased or bundled into a per-device monthly fee. That shift changes how you budget, not just how your accountant records the spending.
The case for buying outright
Buying suits businesses with healthy cash reserves that keep equipment for its full working life. Over a long enough period, owning hardware is usually cheaper than leasing it, because you are not paying a finance margin. You also have full control: you can keep a reliable machine for an extra year, sell or donate old equipment, and choose exactly when to replace.
The downsides are the lump-sum hit to cash and the temptation to keep equipment too long. A server bought outright has no natural end date, so it is often still running years after it should have been retired. Owning also means you carry the risk if something fails outside warranty, and you need someone to track ages so replacements are planned rather than forced by a breakdown in the middle of a busy month.
The case for leasing or device-as-a-service
Leasing spreads the cost of hardware into fixed monthly payments, which preserves cash for growth and makes the IT budget smoother. Many leases build in a refresh at the end of the term, so laptops are replaced on schedule rather than when someone finally complains. Some arrangements bundle warranty, setup and disposal, which reduces admin.
The catch is total cost, which is usually higher than buying, and the contract terms. Read carefully what happens at the end of the term, whether there are penalties for early return, who pays for damaged or missing devices, and whether you can add equipment mid-term on the same rates. A lease that is hard to exit can lock you into old equipment just as firmly as ownership.
Subscriptions and cloud services
Software is now almost always opex. Microsoft 365, accounting packages, CRMs and many line-of-business applications are sold per user per month or per year. The advantage is that costs scale with headcount and you always run a current version. The risk is subscription sprawl, where small monthly charges multiply quietly across the business and nobody cancels the ones that are no longer used.
Moving a server to the cloud is the same trade. You swap a large purchase every five or so years for a monthly bill that may cost more over time, but removes the hardware risk and the replacement project. Compare the full cost over the same period, including support, backup and power, rather than the headline price alone.
How the choice shows up in day-to-day IT
The financing choice has practical effects beyond the accounts. Owned equipment needs someone to track its age and warranty, because nothing forces a replacement. Leased equipment comes with a calendar built in, which keeps machines current but can force a disruptive swap in a busy season if the end date is ignored. Subscriptions shift the work towards managing licences: adding people promptly, removing leavers and checking that nobody holds a premium tier they never use.
Support is also affected. A provider looking after a fleet of identical leased laptops can standardise setup and replacement, while a mix of owned machines bought at different times from different shops takes longer to manage and usually costs more to support. Whichever route you take, keep one register showing every device, whether it is owned or leased, and when it is due to go.
Choosing the right mix
A practical approach for most small businesses is to subscribe to software, buy or lease end-user devices depending on cash flow, and think carefully before buying any new on-premises server. Write down which way you have chosen for each category and why, so the decision is deliberate rather than the result of whichever salesperson called last.
Talk to your accountant before committing to large purchases or long leases, because the tax and balance sheet effects differ and depend on your circumstances. Ask any supplier quoting a lease or subscription for the total cost over the full term, so you can compare it fairly against buying outright. Whatever you choose, record it in your IT plan so the next renewal or replacement does not reopen the whole debate from scratch.
In short
- Capex is buying assets; opex is paying ongoing running costs.
- Buying is usually cheaper long term but needs cash and discipline.
- Leasing smooths costs; read end-of-term and early-exit conditions closely.
- Compare total cost over the same period, not monthly against upfront prices.