The verdict in three sentences
Building a SaaS is only half the story: the run (infrastructure, security, support, enhancements) costs 15 to 25% of the initial development budget every year. A founder who forgets to provision this run ends up, at 12 months, with security debt and a drifting product. The 2026 best practice: write maintenance into the business plan from the first euro raised.
The run's cost items
2026 orders of magnitude for a B2B SaaS in the traction phase.
| Item | 2026 monthly cost (EUR) | Comment |
|---|---|---|
| Cloud infrastructure | 200 - 1,200 | Depends on load and redundancy |
| Monitoring / alerting | 50 - 250 | Uptime, logs, APM |
| Security updates | 400 - 1,500 | Patches, dependencies |
| N1/N2 support | 500 - 2,500 | Tickets, incidents |
| Minor enhancements | 800 - 3,000 | Small features, debt |
| Indicative run total | 1,950 - 8,450 | Excluding major incident |
Support packages by SLA
Support contracts differ by the guaranteed service level.
| Level | Critical resolution time | Hours covered | 2026 price (EUR/month) |
|---|---|---|---|
| Essential | 8 business hrs | 9am-6pm | 800 - 1,500 |
| Standard | 4 business hrs | 8am-8pm | 1,500 - 3,500 |
| Business | 2 hrs | 7 days | 3,500 - 6,500 |
| Critical | 1 hr | 24/7 | 6,500 - 12,000 |
The cost of a major incident
An uncovered incident costs far more than support. Estimate for a SaaS with 400 paying accounts.
Need a professional website?
Kolonell builds websites that attract clients, optimized for the Sénégalese market. Free quote in 2 minutes.
| Element | 2026 estimate |
|---|---|
| Downtime (8 h) | 400 accounts lose access |
| Emergency fix | 3,000 - 8,000 EUR |
| Induced churn (2-4%) | 8-16 accounts lost |
| Reputation impact | Hard to quantify |
| Order-of-magnitude total | 12,000 - 25,000 EUR |
Mini case study
Julie, founder of an HR SaaS in Singapore, spent 120,000 EUR on her build. She had provisioned nothing for the run. At 10 months, a flaw in an un-updated dependency causes a 6-hour incident, fixed in emergency for 6,500 EUR, with 12 accounts lost out of 380. By retrofitting a Standard support plan at 2,200 EUR/month (i.e. 26,400 EUR/year, roughly 22% of build), she stabilises the product: no critical incident over the following 8 months. The run is now a clear line in her business plan, provisioned from the next raise.
FAQ
How much does SaaS maintenance cost per year? In 2026, budget 15 to 25% of the build budget per year, covering infrastructure, security, support and minor enhancements.
What is the difference between hosting and support? Hosting (200-1,200 EUR/month) only covers infrastructure; a support contract adds security, monitoring, support and application fixes.
Can I start without a support contract? Technically yes, but security updates quickly become critical: an unpatched dependency is the number-one risk at 6-12 months.
How do I choose my SLA level? Align the resolution time with criticality for your customers: a billing SaaS used at month-end justifies a Business level, an internal tool is fine with Essential.
Does the run shrink over time? Rarely: the more users you have, the more infrastructure and support grow; the enhancements share may fall once the product matures.
Let's scope your project. Give us your SaaS size (active accounts, criticality, tech stack) and your SLA requirement; we'll price your run and the right support plan. Detailed quote within 48 h. WhatsApp +221 77 596 93 33.
Mohamed Bah
Fondateur, Kolonell
Passionate about digital and entrepreneurship in Africa, Mohamed has been helping Sénégalese businesses with their digital transformation since 2020. Founder of Kolonell, he believes every SME deserves a professional and accessible online présence.
