Infrastructure
How Often Should a Business Replace Its Computers?
Budget for a three-to-five-year life on most business computers, but let support status set the real deadline. A computer that can no longer get operating-system security updates, or cannot run the software your business depends on, is due for replacement at any age. Within that window, repair history, battery health, and workload decide the timing.
Budget for a three-to-five-year life on most business computers, but let support status set the real deadline. A machine that can no longer receive operating-system security updates, or cannot run the software your business depends on, is due for replacement whatever its age. Inside that window, repair history, battery health, and how hard the employee pushes the machine decide whether it goes this year or next.
That answer is less tidy than a single number, and that is the point. A fixed refresh age is useful for a budget forecast, but applied mechanically it retires some healthy machines too early and leaves some failing ones in service too long. The better approach treats age as the trigger for a review, then lets a short set of checks decide the outcome.
Where the Three-to-Five-Year Range Comes From
The range reflects how the industry plans hardware budgets rather than a point at which computers stop working. Intel's IT organization describes a refresh program in which employees whose computers are more than three years old can choose a new PC suited to their work. A Dell PC lifecycle planning page recommends a three-to-four-year refresh so that machines keep pace with new software and peripherals.
Treat those figures as a starting assumption. A large company refreshing on a fixed schedule is buying predictability across thousands of devices. A small business usually gets more value by reviewing each computer at around three years and keeping the ones that still pass, while setting aside money for the ones that will not.
Two Deadlines Age Cannot Override
Some conditions end a computer's working life regardless of how well it runs.
The first is the end of security support. When the operating system stops receiving security updates, newly discovered flaws in it stay open. Antivirus and endpoint tools help, but they sit on top of the operating system and cannot repair its weaknesses. The Australian Cyber Security Centre's system management guidelines say unsupported operating systems should be replaced, with compensating controls in place until they are, and the UK National Cyber Security Centre recommends upgrading obsolete products because products without security updates give attackers vulnerabilities that will never be fixed.
This deadline often arrives through hardware rather than software. A computer whose processor or security chip does not meet the requirements of the next supported operating system version is effectively on a countdown, even if it feels fast today. Paid extended security programs, where a vendor offers them, can buy time to finish a planned replacement. They are a bridge, not a new lifespan.
The second deadline is software compatibility. Accounting packages, line-of-business applications, browsers, and security agents eventually drop support for older operating systems and processors. An application that still launches on an unsupported setup is no longer being tested there, and the vendor may decline to help when something breaks.
Ask your IT provider to report the support end date of every operating system in use at least once a year, and to check hardware requirements before you renew or change a critical application. Those two dates belong on the replacement schedule before anything else.
Signals That Move a Computer Up the List
If a machine clears both deadlines, the decision turns on how well it is serving the person using it. These signals are worth tracking for each device:
- Applications that routinely lag, video calls that stutter, or an employee who closes one program to open another
- Repeated support tickets for the same machine, especially crashes, failed updates, storage errors, or charging and port faults
- A warranty that has ended on a computer someone cannot work without, with parts for that model hard to obtain
- A laptop battery that no longer lasts through the employee's working day away from a charger
No single signal settles the question. A slow machine with nothing else wrong is usually a candidate for a fix. A machine showing three or four of these at once is usually costing more in lost time than a replacement would.
Diagnose Before You Buy
Slowness is a symptom, not a diagnosis.
A nearly full drive, too little memory for current workloads, a pile of startup programs, malware, dust and heat, or a corrupted operating system can each make a sound computer feel old. A failing drive produces similar symptoms and needs prompt attention, because the next symptom may be lost data.
Have the cause identified before approving a purchase. Then weigh the fix against the support timeline from the previous section: adding memory to a computer with four years of operating-system support ahead of it is good value, while the same upgrade on a machine that loses support next year usually is not.
Weigh the Full Cost of Keeping an Unreliable Machine
Repair invoices are the visible part of the cost. The larger part is often the hours an employee spends waiting, restarting, or working around a fault, plus the IT time spent on repeat tickets for the same device.
The role matters as much as the device. A failure that is a minor annoyance for someone at a desk can stop work entirely for an employee who takes payments, visits customer sites, or uses specialist software installed on only one machine. For those roles, a prepared spare that is kept updated and checked on a schedule can turn a lost day into a short swap.
Warranty status changes the math as well. After coverage ends, the business pays for repairs and may wait longer for them. Before a warranty expires on an important machine, compare the price of an extension with the device's age and remaining support life. Manufacturers also limit how long they stock parts for each model, and those periods vary by product line and country, so check the policy for the specific model rather than assuming one rule for the brand.
Ways to Get Another Year or Two
A computer that is supported and fundamentally sound can often be extended cheaply.
Upgrades. More memory or a faster solid-state drive can fix a specific bottleneck, where the model allows it. Price the whole job, including parts, labor, backup, and testing, and compare it with the cost and expected life of a new machine. Many current laptops have memory soldered to the board, so check before planning around an upgrade.
Batteries. Laptop batteries lose capacity as they age and cycle. A new battery can restore a machine that is otherwise healthy, particularly for employees who work away from a desk. If a battery is swollen, unusually hot, or pushing the case out of shape, stop using the laptop and have the battery handled by a qualified technician.
Reassignment. A machine that can no longer keep up with heavy work may be perfectly adequate for email, documents, and web applications. Wipe it, reset it for the new user, update it, and record the new assignment in your asset inventory. Never reassign a computer that is unsupported or already generating frequent tickets, since that only moves the same problem to another desk.
Turn Reviews Into a Budget
A replacement plan only works if the information behind it is current. For every computer, keep the purchase date, model, serial number, assigned employee, warranty end date, operating system and its support end date, and the date of the next review.
From that record, give each machine a target replacement year and revisit it when something changes: a role change, a new application with higher requirements, or a revised support timetable from the operating-system vendor. Machines bought together tend to age together, so spread replacements across budget years where you can rather than letting one purchase cohort force a large single-year spend. Our guide to planning hardware replacements before emergencies covers building that schedule into the budget.
A short list of approved models makes the plan easier to run. Shared docks and chargers, consistent security settings, and faster spare preparation all follow from fewer models. Keep a separate standard for roles with genuinely heavier needs, such as video, design, or engineering work, instead of buying every employee the most powerful option.
Retire the Old Computer in Order
Most replacement problems happen at the handoff, not the purchase. Working through the same steps every time avoids lost files and forgotten devices:
- 1. Back up the employee's business data and confirm the backup can be restored
- 2. Set up the new computer with email, files, applications, printers, and shared folders, and confirm multifactor authentication and any specialist software work before the employee depends on it
- 3. Remove the old machine from device management, security monitoring, backup jobs, and trusted-device lists, and reassign or cancel any licenses tied to it
- 4. Sanitize the storage using a method suited to the drive type, its encryption, and the sensitivity of the data
- 5. Close out the inventory entry with the date the machine left and how its data was destroyed, alongside its asset and serial numbers
Step four matters more than it may appear. Deleting files or removing a user account leaves recoverable data behind. NIST Special Publication 800-88 Revision 2, published in September 2025, is the current guidance for running a media sanitization program and matching methods to data sensitivity. The Australian Cyber Security Centre's guidance on securing devices also advises backing up what you need, unlinking accounts, removing any media, and erasing the device before it leaves your control. For sensitive data, a professional disposal service with documented chain of custody is worth the cost; our guide to secure IT asset disposition explains what to ask for.
Keeping an old computer for a week or two after the switch is reasonable insurance. Leaving it plugged in and unmanaged for months is not, because it remains a device someone has to patch and secure.
A Quick Decision Guide
- Replace now:
- the operating system no longer receives security updates, or required software no longer supports the machine
- Replace next budget cycle:
- support ends within about a year, or the computer shows several reliability signals at once
- Repair or upgrade:
- one identifiable fault on a machine with years of support remaining
- Keep and review in a year:
- supported, reliable, and suited to the employee's current work
Frequently Asked Questions
How many years should a business laptop last?
Plan on three to five years. Laptops are carried, dropped, and charged constantly, so a heavily traveled one may reach the end of that range sooner. Replace any laptop early if it can no longer receive security updates or keep up with the employee's work.
Do desktops last longer than laptops?
They often stay in service longer because they are not carried around and are usually easier to repair and upgrade. The same deadlines still apply: once a desktop cannot run a supported operating system, it is due for replacement.
Should we replace computers on a fixed schedule?
A fixed schedule is useful for budgeting, but individual reviews give better results. Use age to decide when to look at a machine, and its support status, condition, and workload to decide what to do with it.
Is a slow computer always ready for replacement?
No. Storage, memory, malware, heat, or a damaged operating system are common causes and are often fixable. Have the cause diagnosed and compare the fix with the machine's remaining support life.
Is it worth extending a warranty?
It can be for a computer an employee cannot work without and that still has several years of support ahead. It is rarely worthwhile on a machine nearing the end of operating-system support.
Can we sell or donate old business computers?
Yes, after the storage has been sanitized to an appropriate standard and you have recorded how and when it was done.
Sources and Further Reading
- Australian Cyber Security Centre: Guidelines for System Management
- UK National Cyber Security Centre: Obsolete Products
- Australian Cyber Security Centre: Managing the Risks of Legacy IT, Practitioner Guidance
- Intel: Optimizing PC Refresh
- Dell: PC Lifecycle Plan and Design Solutions
- NIST SP 800-88 Revision 2: Guidelines for Media Sanitization
- Australian Cyber Security Centre: Secure Your Devices
If you would like a second opinion on which of your computers are due, Cyber One Solutions can review your fleet's support dates, condition, and replacement timing and turn it into a budget-ready plan. Contact us to get started.