Renewing maintenance on a four-year-old business app in Montreal (2026)

The verdict in three sentences

For a four-year-old business application, application maintenance costs in 2026 the equivalent of 15 to 20% of the initial build cost per year, usually 600 to 2,500 EUR a month (about 900 to 3,700 CAD) for an SME. Price matters less than three clauses: response times (4 hours to 2 business days depending on severity), the volume of changes included and reversibility with up-to-date documentation. Renewing without a prior technical debt audit means signing a fixed fee on a scope nobody knows.

Before signing: the real state of the application

At 4 years, an app has usually accumulated outdated dependencies, framework versions out of support and partial documentation. A short audit of 3 to 5 days prices what a new or current vendor will have to absorb. Without it, you risk either an underpriced fixed fee that slides into time-and-materials billing, or a 30% safety margin paid every month.

Indicative audit budget: 2,500 to 5,000 EUR (3,700 to 7,400 CAD), often credited if the auditing vendor wins the contract.

2026 price grid and service levels

2026 order of magnitude for a business app originally built for 60,000 to 150,000 EUR. CAD figures use roughly 1.48 CAD per euro.

For non-blocking defects, a 2-business-day response is common. Require capped penalties (for example 5% of the monthly fee per breach, capped at 20%) rather than a commitment with no consequence.

The reversibility clause, to draft now

Reversibility is negotiated while you hold signing power, not when you leave. It should specify: delivery of source code and repository history, architecture and operations documentation, hosting and domain access, a handover period of 20 to 40 days with a number of included support days (often 5 to 10), and the rate for extra days. Add a mandatory yearly documentation update as a checked deliverable.

Mini case study

Julien, IT director at a distribution SME, maintains an order management app built in 2022 for 95,000 EUR (about 140,000 CAD). The current vendor offers 2,200 EUR a month, so 26,400 EUR a year, 27.8% of the initial cost.

He orders an audit at 3,500 EUR, which reveals a framework 2 versions behind and 8 days of retro-documentation needed. He negotiates a standard plan at 1,650 EUR a month with 2 days of changes, plus a 9,000 EUR upgrade package in year one. 3-year cost: 3,500 + 9,000 + 59,400 = 71,900 EUR, against 79,200 EUR for the initial offer without upgrade, with an up-to-date app and documented reversibility. The same logic holds for a Montreal SME paying in CAD.

FAQ

Is the 15 to 20% figure a rule?

It is a market benchmark, not a standard. A stable, well-tested app can drop to 10 to 12%, while a critical app with on-call support can exceed 25%.

Should we switch vendors at renewal?

Not necessarily: switching costs 10,000 to 20,000 EUR in takeover and ramp-up. It is justified if response times are missed, if the code is not accessible or if the price gap exceeds 25%.

What should the monthly maintenance report include?

Number of tickets by severity, actual response and resolution times, days used and security updates applied. A one-page report is enough if it is quantified.

Can unused change days be carried over?

It is negotiable: carry-over for up to 3 months is common practice. Beyond that, the vendor loses visibility on its schedule.

What contract length should we choose?

A 2 or 3 year commitment with yearly review and termination possible at each anniversary with 3 months' notice. Long-term discounts rarely exceed 5 to 10%.

Let's scope your project. Send us a description of your app and your current contract, and we will propose a 3 to 5 day audit and maintenance at 600 to 2,500 EUR a month with written reversibility. Detailed quote within 48 h. WhatsApp +221 77 596 93 33.