Custom business software: when you need it and what it costs

Custom business software makes sense once your spreadsheets have multiplied, the same piece of information gets retyped by hand in three different places, and only one person in the company actually knows how the process works. A focused MVP built around the workflow that hurts the most costs 8,000 to 20,000 euro. A fuller system runs from 20,000 euro up.

I am writing this because it is the question I hear right after the one about website pricing: "the site is fine, but what I really need is something to manage my orders." Or shifts, or inventory, or customer files. Almost always, the person asking already has something in place, except that something is a shared spreadsheet passed around on WhatsApp, and nobody is sure anymore which version is the right one.

The signs you have outgrown spreadsheets

It is not about how old your spreadsheet is. It is about how much it costs you, every single week, to keep it standing.

If two or three of these rows sound familiar, the problem is not that the people you work with are disorganised. It is that the tool you are all using has stopped fitting how much you have grown. A spreadsheet used to be enough. Now it takes more energy to maintain than it saves.

Where to start: the MVP, not the perfect system

The first mistake I see, and it is an understandable one, is wanting to build the system that handles everything at once: orders, inventory, invoices, customers, reporting. What comes out of that is a project that costs three times as much, takes months before anyone can actually use it, and then runs into some detail nobody planned for, because nobody had used the real thing yet.

I prefer to start with a single question: which one process is costing you the most time or money right now? That, and only that, becomes the first piece to build. Done properly, tested with the people who will use it every day, in your hands within a few weeks rather than by autumn. Then the second piece gets added, and the third, based on needs that show up once the tool is actually in use, not on ones guessed at a desk.

This approach has an advantage rarely said out loud: if you realise after the first module that the priority was actually something else, you have lost a few weeks, not a year of development.

What custom business software costs

The ranges are wide here too, for a specific reason: "business software" covers both a two-screen tool that replaces one spreadsheet, and a system with several modules, user permissions, reporting and outside integrations.

Within either band, the factor that moves the price the most is integrations. Business software that lives on its own, with just its own data, is the cheaper version. Software that has to talk to electronic invoicing, to the accountant's own system, to an e-commerce store or a physical warehouse, means studying each connection on its own terms. There is no universal cable that plugs them all in together.

The integrations that drive the price up

Four items come up in nearly every project I take on, and it is worth knowing them before you ask for a quote, not after.

• Electronic invoicing. Invoices have to be generated, sent and stored in the format tax authorities require: not a detail, a legal requirement with its own technical logic.
• Accounting software. If your accountant already works on a specific platform, your system has to export or sync data in a format that platform understands.
• E-commerce. Orders, stock levels and customers have to stay in sync between the online store and the internal system, or you end up selling things you no longer have.
• Warehouse and inventory. If you move physical stock, the system needs to know in real time what is actually on the shelf, not what the last count said two months ago.

Every added integration means more development, more testing, more upkeep down the line. Adding them is fine, but each one carries roughly the weight of its own small module in the price.

The risks of doing it, and of not doing it

The most common risk when building custom business software is handing it to someone who treats it like any other project, without really understanding how your business runs day to day. The software that comes out of that works on paper and falls apart the first time someone uses it for a case the quote never covered.

The opposite risk, staying on spreadsheets and WhatsApp for too long, is less visible but costs more: hours lost every week retyping data, mistakes nobody catches until they cost a customer, and growth held back because the current setup cannot carry the workload anymore. It is not a breakdown you can see. It is a cost that builds up quietly.

How to get started

If two or three signs from the first table sound like your business, it is worth asking two questions before you even request a quote: which process costs you the most time today, and who in the company understands it best? The answers matter more than any feature list.

The services page covers custom software projects alongside websites. If the real question is still one step earlier, whether the answer is a website, a web app, or actual business software, I cover that here: website vs web app. And if you want the full breakdown of how a software project reaches a specific number, I wrote about it in how much does custom software cost.