TL;DR: Many business computers are replaced on a three to five year cycle, but age alone is a weak guide. Replace any computer that can’t run a supported operating system or the software you depend on. For the rest, weigh the job it does and the person who uses it. New PCs cost more in 2026, so review each computer at three years, stagger purchases, and plan replacements before something fails.
How long business computers last is a question with a tidy answer and a real one. The tidy answer is three to five years. It’s a fair planning range, and it’s where a lot of advice stops.
The real answer depends on things a number can’t capture. A four-year-old laptop might be fine at the front desk and a daily drag for the person who builds your estimates. Same age, same model, two different decisions.
That gap matters more this year. New computers got more expensive in 2026, and keeping an old Windows 10 machine now carries a yearly fee. “Run it until it dies” and “replace everything at year three” are both costly ways to avoid thinking about it.
Here’s how I’d sort it out if I were sitting with a Louisville business owner and a list of their computers.
How Long Do Business Computers Last?
Three to five years is a practical planning range for many office computers. Start reviewing each one at three years old. Some will be worth keeping another year or two. Others need to go sooner because they can’t run a supported operating system, struggle with required software, or keep needing repairs.
A computer tends to wear out in stages. It slows down, the battery fades, a fan gets loud, and video calls start to stutter. The cost shows up as minutes lost every day, long before anything breaks.
A review at three years gives you time to budget and keeps you from replacing half the office in one month.
Age Is What the Tools Know. The Job Is What You Know.
Good IT monitoring can tell you a lot about a computer: its age, its warranty date, its operating system, how full the drive is, and how often it crashes. Your IT provider can hand you that list today.
Software can’t tell you the rest. It doesn’t know that one person bills clients by the hour and waits two minutes for a file to open. It doesn’t know you’re hiring three people in the spring, or that the laptop in the conference room only runs a slideshow.
You know those things. So the best replacement decisions come from putting both lists side by side. For each computer, ask:
- Is it still supported and under warranty? Your IT provider knows.
- How much does this person’s work depend on it? You know.
- What does an hour of that person’s time cost the business? You know.
- Is this role changing in the next year? You know.
A slow computer in front of your highest-billing employee is an expensive computer, whatever its age. Replace by role and risk, and let the birthday be a reminder to look.
When Does a Computer Have to Be Replaced, Whatever Its Age?
Replace a computer when it can’t run a supported operating system, can’t run the software your business requires, or costs more to keep repairing than it’s worth. These aren’t judgment calls. A computer that no longer gets security updates is a risk to every other device on your network.
Windows 10 is the current example. Its support ended in October 2025. Businesses can pay Microsoft for Extended Security Updates, and the price doubles each year: $61 per device in the first year, $122 in the second (which began October 14, 2026), and $244 in the third. The charges are cumulative, so joining late means paying for the years you skipped.
That fee buys patches for an old machine. It can be a sensible bridge for a PC tied to software that isn’t ready for Windows 11. For many others, it’s money better spent on the replacement.
Repairs follow the same logic. One fix on an out-of-warranty laptop is fine. A second or third is a sign.
Why Does Replacing a Computer Cost More in 2026?
Memory got expensive. Demand from AI data centers has pulled memory production away from ordinary PCs, and the cost is landing in computer prices. In February 2026, Gartner forecast that PC prices would rise 17% in 2026 compared with 2025, driven by a surge in memory and storage costs.
Gartner also expected businesses to respond by keeping computers about 15% longer. That’s a reasonable instinct, with a limit. Stretching a supported, reliable computer an extra year is good budgeting. Stretching one that’s out of support is how a hardware cost turns into a security cost.
Higher prices are a reason to plan earlier. Get quotes before you need the computer, spread purchases across the year, and don’t wait for a failure to force a rush order at whatever price is available.
Should You Upgrade or Replace?
Upgrade when the computer is supported, reliable, and held back by one thing you can fix, like too little memory or a full drive. Replace when it fails the security or software checks, or when the fix costs a large share of a new machine. An upgrade can’t make an unsupported computer safe.
Two cautions this year. Memory is the part that went up in price, so the upgrade that used to be cheap may not be. And some laptops can’t be upgraded at all because the memory is built into the board. Have your IT provider check before you count on it.
Give Older Computers an Easier Job
A computer that’s too slow for one role may be fine for another, as long as it’s still supported and updated. It can become a spare for when someone’s laptop is in for repair, or serve a light-duty spot like a shipping station or a shared kiosk.
I’d draw one line. An old computer isn’t a good hand-me-down for remote work. I always recommend that the business provide the laptop or desktop for anyone working remotely, so the company controls the security on it, and that computer should be a solid one.
When a computer is finished, make sure its data is moved and backed up, then have the drive wiped before it leaves the building. A retired PC with client files still on it is a breach waiting in a closet.
Plan the Replacement Before the Computer Decides for You
A replacement plan doesn’t need to be complicated. Know what you own, review each computer at three years, replace anything that can’t be kept secure, and match the rest to the work people do. Your IT provider brings the facts about each machine. You bring what you know about your people and your plans.
If you’d like help building that list, schedule an intro call with Z-JAK. Equipment planning is part of our managed IT services, and if you already have an IT person, co-managed IT can give them the tools to track it.
Frequently Asked Questions
How many years should a business laptop last?
Three to five years is a practical planning range for many business laptops. Replace one sooner if it becomes unreliable, can’t get security updates, or no longer keeps up with the work its user does.
Is it safe to keep using a Windows 10 computer?
Only if it’s receiving security updates. Windows 10 support ended in October 2025, so a business PC needs paid Extended Security Updates to stay patched. Those cost $122 per device in the second year and $244 in the third. Without them, the computer shouldn’t be on your network.
Is it cheaper to upgrade memory than to buy a new computer?
Sometimes. An upgrade makes sense for a supported, reliable computer that’s short on memory or storage. Memory prices rose sharply in 2026, and some laptops can’t be upgraded, so get a quote for both options before deciding.
Should we replace all our computers at once?
Usually not. Replacing a portion each year spreads the cost, avoids one large bill, and means your computers don’t all age out together. Reviewing each one at three years old makes this easier to schedule.
What should we do with old computers?
Reuse them in lighter roles if they’re still supported. When a computer is retired, move and back up its data, have the drive wiped, and recycle it through a reputable electronics recycler.
Not Sure Which Computers to Replace First?
Start with a list of what you have and how old it is. If you don’t have one, talk with our Louisville team. Sorting out which machines can wait and which can’t is a good first conversation, and it fits into your wider cybersecurity plan.