The verdict in three sentences
Outsourced application maintenance of a website is billed in 2026 between 500 and 3,000 EUR/month depending on scope, with a typical 12-month commitment. The key distinction is between corrective (keeping the site running) and evolutive (making it progress): mixing the two without an hours cap makes budgets drift. Lock in service levels, response time and reversibility before comparing prices.
2026 maintenance pricing grid
The ranges below are 2026 orders of magnitude for a B2B site, excluding heavy infrastructure management. The retainer depends mainly on the volume of evolutive work and the SLA level.
| Maintenance tier | Scope | Monthly retainer | Commitment |
|---|---|---|---|
| Essential | Corrective + security | 500-900 EUR | 12 months |
| Standard | Corrective + 5h evolutive | 1,000-1,800 EUR | 12 months |
| Advanced | Corrective + 10-15h evolutive | 2,000-3,000 EUR | 12-24 months |
| On demand | No retainer, ticket | 90-140 EUR/h | none |
Corrective vs evolutive: timelines and coverage
The contract must clearly separate the two flows, each with its response time and resolution time.
| Incident type | Response time | Target resolution time | Included in retainer |
|---|---|---|---|
| Blocking (site down) | 2-4 h | 4-8 h | yes |
| Major (broken feature) | 4-8 h | 24-48 h | yes |
| Minor (display) | 24 h | 5 business days | yes |
| Functional evolution | on schedule | on quote | per hours |
Mini case study
Mehdi, IT manager of a distribution SME in Lille, runs a catalogue site with a client area. In-house, a half-time developer costs him about 2,800 EUR/month loaded, with no availability guarantee during holidays. He outsources to Standard maintenance at 1,500 EUR/month with 5h of evolutive work and a 24-48h SLA. Direct saving: 1,300 EUR/month, i.e. 15,600 EUR/year, plus guaranteed service continuity and a reversibility clause that avoids any lock-in.
FAQ
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What is the difference between maintenance and outsourced application maintenance?
Basic maintenance covers technical upkeep; outsourced application maintenance adds evolutive work driven by contractual service levels (response and resolution times). It is the standard for a strategic site.
Is a 12-month commitment required?
It is common because the agency provisions a team. Negotiate a 3 or 6-month exit clause with notice so you are not stuck if the service disappoints.
What happens if I exceed the included hours?
Extra hours are billed at the agreed rate (90-140 EUR/h in 2026). Require an alert at 80% consumption to avoid nasty surprises.
Is reversibility really necessary?
Yes: without it, switching providers can cost several thousand euros in handover. Require delivery of code, credentials and documentation within 15 days.
In-house or outsourced: which to choose?
Below one genuinely busy full-time role, outsourcing is almost always cheaper and more resilient (no single-person dependency, continuity during holidays).
Let's scope your project. Share your stack, your incident volume and your evolutive needs: we will calibrate a maintenance retainer with SLA and reversibility. 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.
