The verdict in three sentences
An application maintenance contract for an SME business application is negotiated in London at 1,000 to 5,000 GBP a month in 2026, and in Paris at 800 to 4,000 EUR excluding VAT, which in practice amounts to 15 to 20% of the original build cost per year. The value of the contract lies not in the monthly fee but in the written commitments: response to a blocking incident within 4 hours, a pool of enhancement days, and a reversibility clause that lets you leave with the code and documentation. An IT director who renews without rereading these three points often pays top price for ad hoc troubleshooting.
What application maintenance costs in 2026
The figures below are 2026 market ballparks for London and Paris, for a business application that cost 40,000 to 150,000 EUR to build. They are not Kolonell's price list.
| Maintenance level | Typical scope | London monthly fee (market estimate) | Paris equivalent (market estimate) |
|---|---|---|---|
| Corrective baseline | Bug fixes, security updates, backups | 1,000 to 1,800 GBP | 800 to 1,500 EUR |
| Corrective + preventive | Baseline + dependency upgrades, monitoring | 1,800 to 3,000 GBP | 1,500 to 2,500 EUR |
| Corrective + light enhancements | Baseline + 2 to 3 enhancement days per month | 3,000 to 4,200 GBP | 2,500 to 3,500 EUR |
| Full maintenance | All of the above + on-call, 4 to 5 enhancement days | 4,200 to 5,000 GBP and up | 3,500 to 4,000 EUR and up |
| Ad hoc time and materials | Day rate, no turnaround commitment | 550 to 750 GBP per day | 600 to 800 EUR per day |
For an application that cost 120,000 EUR to build, the 15 to 20% rule gives a budget of 18,000 to 24,000 EUR a year, 1,500 to 2,000 EUR a month. If your current provider charges 3,500 EUR for a mere corrective baseline, renegotiation is justified.
The commitments to demand, line by line
Price means nothing without written service levels. Here are common 2026 SLAs and what an SME IT director can reasonably ask for.
| Commitment | 2026 market standard | What to ask for | Common trap |
|---|---|---|---|
| Blocking incident | Response within 4 business hours | 4 h response, workaround within 1 business day | "Response" with no resolution time |
| Major incident | Response within 1 business day | Fix within 3 business days | No written definition of "major" |
| Minor incident | Handled in the next release | Scheduled monthly release | Indefinite postponement |
| Enhancement pool | 1 to 5 days per month | Unused days rolled over for 3 months | Days lost at month end |
| Availability | 99.5% monthly | 99.5% with a 5% fee penalty per missed point | Availability measured by the provider alone |
| Reversibility | Often missing | Handover of code, access and documentation within 30 days | Documentation delivered "as is" |
Reversibility is the most neglected point. Require a Git repository in your company's name, admin access to hosting, up-to-date operations documentation, and a 5 to 10 day handover period with the successor billed at the contractual day rate.
Renegotiate or switch provider
Three signals justify a tender: a fee above 25% of build cost per year, blocking incidents handled in more than 2 days, or a provider unable to produce a dependency inventory. A serious tender takes 4 to 6 weeks and a transition 1 to 2 months.
An alternative is to hand maintenance to a French-speaking nearshore team, within 1 or 2 hours of your time zone (Dakar runs on GMT, the same clock as London in winter). At Kolonell, keeping a custom web application in working order follows three monthly plans: 35,000, 75,000 or 120,000 FCFA (about 50, 110 or 180 EUR), covering security, backups and small fixes. Heavier enhancements are quoted separately, which keeps the monthly fee readable.
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Claire, IT director of a 120-employee distribution SME (illustrative scenario), pays 3,200 EUR a month for maintenance of an order management tool built in 2022 for 95,000 EUR. That is 38,400 EUR a year, 40% of the build cost. Her real need: a corrective and preventive baseline, plus about 2 enhancement days a month. By renegotiating on the basis of 18% of build, 17,100 EUR a year, plus 24 enhancement days at 650 EUR, she reaches 32,700 EUR a year with written SLAs. She saves 5,700 EUR in the first year and, above all, gains a reversibility clause that reduces her dependency. A London firm in the same situation paying 3,000 GBP a month would follow the same logic.
FAQ
What percentage of build cost should go to maintenance each year?
The market benchmark is 15 to 20% of build cost per year. For an 80,000 EUR application, that is 12,000 to 16,000 EUR a year, 1,000 to 1,330 EUR a month.
What is the difference between response time and resolution time?
Response means a technician has started working on the ticket, often within 4 hours. Resolution, or at least a workaround, must be a separate commitment, for example 1 business day for a blocking incident.
Are unused enhancement days lost?
In many contracts, yes, at the end of each month. Negotiate a 3-month rolling carry-over: on a 3-day pool at 650 EUR, that avoids losing up to 1,950 EUR a month.
What commitment length should we accept?
A 12-month renewable term with 3 months' notice is standard. Avoid 36-month contracts without an exit clause tied to SLA breaches.
Can maintenance be outsourced offshore without losing quality?
Yes, if the contract, SLAs and reversibility are identical and the team works in your language within 1 or 2 hours of your time zone. French-speaking nearshore day rates sit around 250 to 450 EUR, versus 600 to 800 EUR in Paris.
Let's scope your project. Send us your current maintenance contract and your application's architecture: we propose a takeover with maintenance from 35,000 to 120,000 FCFA a month and separately priced enhancements. 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.
