Most of the small businesses I look after around Maidenhead and High Wycombe replace their IT equipment on exactly one schedule: when it dies. Usually on a Monday morning, usually with customers waiting and no spare in the cupboard. It is the most expensive way to do it, and it is almost entirely avoidable.

The honest answer to "when should I replace this?" is rarely about age on its own. Here is how I actually think about it.

Kit does not fail on a date, it fails on a curve

A switch that went in eight years ago can keep passing traffic perfectly well. The problem is usually not the metal box in the cupboard, it is whether the manufacturer is still issuing firmware and security updates for it. Once those stop, you are running an internet-facing device that nobody is patching any more, and that is a very different sort of risk to a slightly slow laptop.

So when someone asks me when to replace business IT equipment, my first question is not how old it is. It is: is this thing still supported, and what happens to the business on the day it stops?

How long each piece actually lasts

Rough working lifespans, based on what I see in the field rather than what the datasheet claims:

  1. Firewalls and routers, 5 to 7 years. Support windows set the limit here, not hardware failure. This is the one I would never knowingly run past end-of-support.
  2. Network switches, 8 to 10 years, often longer. Genuinely boring, genuinely reliable. Replace when you need more ports or more PoE, not because of the calendar.
  3. Wireless access points, 5 to 7 years. Driven by what your staff and guests are carrying. Newer phones and laptops get more out of newer access points.
  4. Laptops and desktops, 4 to 5 years. Often extendable, and I will come back to that.
  5. CCTV recorders, 7 years plus, but the hard drives inside them 3 to 5. Drives writing 24 hours a day wear out. The recorder itself usually does not.
  6. UPS batteries, 3 to 4 years, no arguments. An untested UPS with tired cells is worse than no UPS at all, because you think you are covered.

The signs that matter more than age

Whatever the purchase invoice says, I would put something on the replacement list when:

  • The manufacturer has stopped issuing security updates for it.
  • You have quietly built a workaround around it: the weekly reboot, the "don't use that socket" rule.
  • You could not get a replacement in your hands within a day if it died tonight.
  • It is capacity-limited rather than fault-limited. You have simply outgrown it.

That third point matters more out here than people expect. If you are running a business up towards the Chilterns, or in one of the older buildings around Marlow where nothing is quite standard, a spare part and an engineer are not always twenty minutes away. Availability of a replacement is part of the risk, not an afterthought.

Here is what I would actually recommend

Not everything needs replacing, and I will happily tell you so. A 2021 laptop that feels slow usually does not need binning. An SSD and a memory upgrade will typically buy you another two good years for a fraction of the cost of a new machine, and if you are comfortable with a small screwdriver it is a perfectly reasonable job to do yourself. Same with switches: if it has the ports you need and it is still supported, leave it alone and spend the money elsewhere.

Where I would not compromise is the firewall or router at the edge of your network, and the backup running quietly behind everything else. Those two carry risk that the rest of the kit simply does not.

Build a replacement plan, not a panic list

The whole point is to turn replacing business IT equipment into a budgeting exercise instead of an emergency. Five steps:

  1. Write down every piece of kit with its model and the year you bought it.
  2. Check each manufacturer's end-of-support date. Most of them publish it.
  3. Rank by what actually stops the business if it fails, not by what it cost.
  4. Budget one or two planned replacements a year, rather than one very bad year every five.
  5. Keep a cold spare of anything critical and cheap. A spare access point in a drawer costs very little and saves you a day.

Half an hour with a notepad puts you ahead of most small businesses I walk into.

If you need help working out when to replace business IT equipment in Berkshire or Buckinghamshire, get in touch. I will come and look at what you have, tell you honestly what is fine and what I would deal with first, and put a fixed price against anything that genuinely needs doing.