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How much does it cost to replace spreadsheets with a custom app?

Most businesses run on spreadsheets long after they stop working. This guide explains what a custom replacement costs, what pushes the price up or down, and how to work out whether it is worth it for you.

GuidesUpdated 9 October 20263 min read

01Signs you have outgrown your spreadsheets

  • Several people edit the same file and overwrite each other's changes.
  • Data is copied by hand between the spreadsheet and other tools (CRM, invoicing, email).
  • Nobody fully trusts the numbers, so reports are checked twice before they are sent.
  • You need different access levels, but everyone can see and change everything.
  • A mistake in one formula has already cost you money or a customer.

If two or more of these sound familiar, the spreadsheet is no longer saving you time. It is costing you time.

02Typical cost of a custom internal app

Prices depend mostly on how many processes the app covers, how many integrations it needs and how much data has to be migrated. These are indicative market ranges for a custom build in 2026:

ScopeIndicative budgetTypical timeline
One process (e.g. order tracking), simple roles€10,000 – €25,0004 – 8 weeks
Several linked processes, roles and permissions, reporting€25,000 – €60,0002 – 4 months
Full internal platform with integrations (CRM, accounting, e-commerce)€60,000+4 months +

Running costs (hosting, monitoring, small changes) usually add a few hundred euros per month, far less than per-seat SaaS pricing once you have more than a handful of users.

03What drives the price up or down

  • Workflow complexity: approvals, statuses and exceptions are usually the largest part of the budget.
  • Integrations: each connection to another system (accounting, CRM, payments) adds work and testing.
  • Data migration: years of inconsistent spreadsheet data often take longer to clean than expected.
  • Roles and permissions: who can see and change what has to be designed carefully.
  • Starting small: launching with the one process that hurts most, then extending, keeps the first budget low.

04Does it pay for itself?

A quick way to check: count the hours your team spends each week on copying, checking and fixing spreadsheet data, then multiply by their hourly cost. For example, 8 people losing 2 hours a week at €35 an hour is about €29,000 a year, before counting errors.

If the yearly cost of the problem is close to the build cost, a custom app usually pays for itself within 12 to 24 months.

05When a spreadsheet or an off-the-shelf tool is enough

Keep the spreadsheet if only a few people use it and mistakes are cheap. Try an existing SaaS or no-code tool first if your process is standard. Custom software makes sense when the process is specific to your business, involves several teams or systems, or when errors are expensive. See how we build internal business systems.

06Frequently asked questions

How long does it take to replace a spreadsheet with an app?
A focused app covering one process typically takes 4 to 8 weeks. Larger systems with several processes and integrations take 2 to 4 months.
Can we keep our existing data?
Yes. Existing spreadsheet data is cleaned and imported into the new app as part of the project, so nothing is lost.
Is no-code (Airtable, Baserow) a good alternative?
For small teams and simple processes, yes. It becomes limiting when you need fine-grained permissions, complex logic, high volumes or reliable integrations.

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