The verdict in three sentences
A website's maintenance retainer costs 80 to 900 EUR/month in 2026 depending on service level, i.e. 960 to 10,800 EUR/year. Basic covers updates and backups, premium adds evolutions and guaranteed SLAs. The right question isn't the price but the acceptable risk level: a low-criticality brochure site doesn't justify a premium plan.
The three maintenance tiers in 2026
Here are the standard market tiers with their real scope. Order of magnitude 2026.
| Tier | Monthly price | Annual price | What's included |
|---|---|---|---|
| Basic | 80 to 150 EUR | 960 to 1,800 EUR | CMS updates, backups, uptime |
| Standard | 200 to 400 EUR | 2,400 to 4,800 EUR | + fixes, monitoring, small tweaks |
| Premium | 500 to 900 EUR | 6,000 to 10,800 EUR | + evolutions, SLA, priority support |
The jump from basic to standard mainly buys responsiveness; the jump from standard to premium buys evolution hours and a guaranteed response time (SLA).
Monthly retainer or on-demand
A retainer smooths the budget and guarantees responsiveness; on-demand minimizes cash but exposes you to risk. Comparison.
| Criterion | Monthly retainer | On-demand |
|---|---|---|
| Budget predictability | High | Low |
| Hourly rate | Included (favorable) | 70 to 120 EUR/h |
| Response time | Guaranteed (SLA) | Subject to availability |
| Security updates | Systematic | Often forgotten |
| Ideal for | Critical / active site | Static, rarely edited site |
| Breach risk | Low | High if neglected |
Never leave a site without any maintenance: an un-updated CMS is the number-one entry point for hacks. Even a basic 80 EUR/month plan beats nothing.
Mini case study
Nadia, director of a 12-employee consulting firm in Marseille, is torn between on-demand and a retainer. Her site is a brochure but generates 40 % of her leads. On-demand, she paid 1,400 EUR last year in ad-hoc work, but suffered 3 days of downtime after an unpatched flaw, with lost leads. A standard retainer at 300 EUR/month = 3,600 EUR/year guarantees updates, monitoring and a 4-hour response time. Given the site's commercial weight, she switches to the retainer: the 2,200 EUR extra buys the availability of her main acquisition channel.
Need a professional website?
Kolonell builds websites that attract clients, optimized for the Sénégalese market. Free quote in 2 minutes.
FAQ
How much does website maintenance cost per year?
From 960 EUR/year for basic to 10,800 EUR/year for premium with an SLA in 2026. Most SMEs sit on the standard tier, around 2,400 to 4,800 EUR/year.
What does a basic retainer really cover?
CMS and plugin updates, regular backups and uptime monitoring. It includes neither evolutions nor significant content edits.
Retainer or on-demand for a small site?
For a rarely edited static brochure, on-demand can suffice, provided security isn't neglected. As soon as the site is an acquisition channel, a retainer is safer.
What is an SLA and why pay for it?
An SLA contractually guarantees a response time (e.g. 4 hours). You pay for it when prolonged downtime directly costs sales or credibility.
Can we cancel or change tiers easily?
Yes, most contracts are monthly or annual with a short notice period. Start on standard, move up to premium if your evolution needs grow.
Let's scope your project. Tell us your site's criticality and evolution needs: we'll propose the right-sized maintenance tier, with no unnecessary premium. 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.
