Do you need custom software, or will a spreadsheet do?

Spreadsheets are the most underrated business tool ever made. For a huge number of jobs, a well-built sheet is genuinely the right answer — free, flexible, and something you already know. So before anyone sells you software, here's an honest test for when a spreadsheet is fine, and the exact moment it starts quietly costing you money.

When a spreadsheet is the right call

• One or two people use it, and rarely at the same time.
• The data is small enough to scroll through and eyeball.
• Mistakes are cheap to spot and fix.
• The process doesn't change much month to month.

If that's you, don't let anyone talk you into a subscription. A spreadsheet — or one of our free web tools — will do the job.

The five signs you've outgrown it

A spreadsheet stops being free the moment it starts eating time or causing errors. Watch for these:

1. Two people overwrite each other's work

The "who has the latest version?" problem. The second it costs you a real mistake — a double-booked slot, a wrong stock figure — the spreadsheet is now a liability.

2. You copy the same data between sheets by hand

Manual re-entry is where errors live, and it's pure lost time. If a sale has to be typed into three places, software that does it once has already paid for itself.

3. You dread a routine report

If pulling the month's numbers takes a morning of copy-paste and formulas, that's a recurring tax on your time. A purpose-built tool turns it into one click.

4. New staff need a week to "get" the sheet

When the process only lives in your head and one fragile file, the business can't grow without you sitting next to it.

5. A wrong cell would actually hurt

Once an accidental keystroke can mis-price an invoice or lose a customer's details, you need guardrails a blank grid can't give you.

The honest middle ground

Not everything needs a big system. Often the right answer is a small, focused tool that does one job well — invoicing, or bookings, or stock — built around exactly how you work, that you own outright with no per-seat fee. That's a couple of weeks of work, not a six-month project.

The test is simple: if the spreadsheet is saving you time, keep it. The day it starts costing you time or money, that's the day custom software becomes the cheaper option — not the more expensive one.