Replacing Excel: When Is Custom Software Worth It?

Excel is the most widely used operating system in small companies. Not Windows, not macOS: the spreadsheet that holds customers, jobs, deadlines and amounts. That's not a mistake. Excel is fast, everyone knows it, and in the beginning it's all you need. The question isn't whether Excel is bad. It's when you've outgrown it.

Five signs it's time

1. The same information lives in three places. The customer is in the job list, in the invoice sheet and in the email distribution list. When they move, someone has to remember three places. Usually they remember two. From then on the data no longer matches, and nobody knows which version is right.

2. The month-end overview takes half a day. Open jobs, upcoming deadlines, revenue by customer: it's all in the spreadsheets, but every month someone has to gather it by hand, copy it and check it. Those hours come back every month, and they grow with every new sheet.

3. Only one person knows how the spreadsheet works. There are formulas nobody is allowed to touch, a tab called "OLD_do_not_delete" and a copy of a copy. When that person is on holiday or leaves the company, the spreadsheet stands still. That isn't a software problem. It's a business risk.

4. Several people work in the same file at once. Read-only, "Overview_FINAL_v3_new.xlsx", changes lost because two colleagues saved at the same time. As soon as more than two people maintain the same list, Excel becomes the bottleneck.

5. Deadlines depend on individual memory. The spreadsheet knows when a contract expires. It just doesn't tell anyone. Reminders live in one person's calendar or on a sticky note on the monitor. Miss the deadline and it costs money or a customer.

If three of these five apply to you, your company has outgrown Excel.

Two cases where you should stick with Excel

I build custom software, and I still advise against it in two cases.

One person, one list. If you alone maintain a spreadsheet and nobody else needs reports from it, Excel is the right choice. Software pays off when data has to flow between people and programs.

An off-the-shelf program covers ninety percent. For accounting, payroll or time tracking there is good standard software. If such a program fits the way you work, use it. Custom software pays off where your company works differently from the standard and the program forces you to bend.

What "custom software" actually means

It doesn't mean you get a program that does everything. It means your lists come together on one central platform your team uses with clear permissions. Every piece of information is entered once and is available wherever it's needed. Reports come out of the data instead of out of manual work. Deadlines live in the system, and the reminder goes automatically to the right person.

Your existing spreadsheets are imported, not retyped. An import maps the columns to the right fields, recognises different date and number formats and flags duplicates.

What getting started looks like

The first step is small: the one thing that costs you the most time. Usually that's the list that gets touched most often, or the report that takes longest every month. That step is typically in the four-figure euro range and in use within a few weeks. After that you decide step by step what's worth doing next.

If you want to know whether it adds up for your company: tell me briefly which spreadsheet costs you the most nerves. The first call takes about 30 minutes and is free.