Custom Software vs SaaS Subscriptions: When Does Owning Become Cheaper? — Visual-AI-Labs

A 40-person company in 2026 typically pays for 12–25 SaaS subscriptions: CRM, project management, helpdesk, forms, e-signature, reporting, automation glue and a long tail of "small" tools. Each one looked cheap when it was bought. Together they often cost €60,000–€150,000 per year — and the bill grows with every new hire, because almost all of them are priced per user.

This guide gives CEOs and CFOs a transparent way to answer one question: at what point does owning custom software become cheaper than renting SaaS? No magic calculators — just the numbers you already have on your invoices.

Step 1: Calculate your real SaaS cost

The licence line is only the visible part. A realistic annual SaaS cost has five components:

• Licences: price per user × users × 12, for every tool. Include the "Pro" tier you were pushed into for one feature.
• Annual price increases: most vendors raised prices 7–20% in 2024–2026. Budget at least 8% per year.
• Integration glue: Zapier/Make tasks, connectors and the hours someone spends fixing broken syncs.
• Manual workarounds: exports to Excel, double data entry, copy-paste between tools. Hours × hourly cost × 52.
• Lost fit: processes bent to match the tool — slower quoting, missed follow-ups, reports nobody trusts.

Step 2: Calculate the real cost of custom software

• Initial build: for a focused internal platform replacing 3–6 tools, typically €25,000–€90,000 in Europe in 2026.
• Hosting and infrastructure: €100–€800 per month for SME scale.
• Maintenance and evolution: plan 15–20% of the initial build per year.
• Internal time: workshops, testing and rollout — usually 40–120 hours from your team.

Step 3: The break-even formula

Break-even (months) = initial build ÷ (monthly SaaS total cost − monthly custom run cost). If the result is under 24 months and the process is core to how you earn money, custom software is usually the better investment. Over 36 months, stay on SaaS or replace only the most expensive tool.

Worked example

• 35 users, CRM + helpdesk + project tool + automation: €5,200/month in licences.
• Hidden costs (glue, double entry, exports): €3,800/month.
• Total SaaS cost: €9,000/month, growing ~8% per year.
• Custom platform: €60,000 build + €1,500/month hosting and maintenance.
• Break-even: 60,000 ÷ (9,000 − 1,500) = 8 months. Three-year saving: roughly €210,000.

When SaaS is still the right answer

• Commodity functions that are identical across companies: email, accounting, payroll, video calls.
• Fewer than 10 users and no growth plans — per-user pricing stays small.
• Processes still changing every month: validate on SaaS first, then build.
• Heavy regulation where a certified vendor carries the compliance burden.

The hybrid model most companies end up with

The best answer is rarely "replace everything". Visual-AI-Labs typically keeps commodity SaaS (accounting, email) and replaces the tools where your competitive advantage lives — sales pipeline, operations, client portal — with one custom platform that integrates the rest. In 2026, AI layers (document reading, automatic follow-ups, reporting) are added to that platform without per-seat AI surcharges.

How we run the calculation with you

In a free 30-minute audit we list your subscriptions, estimate the hidden costs together and deliver a spreadsheet with every assumption visible. You change any number and see the break-even move. If SaaS wins, we tell you. If custom wins, we deliver the first version in maximum 30 days.

Want your break-even calculated on your real invoices? →