The verdict in three sentences
The development price of a web app is only the tip of the iceberg: over 3 years, maintenance, hosting, enhancements and licences often double the initial budget. A CIO who reasons on the build alone underestimates the real cost by 50 to 120 %. The right reflex: think in total cost of ownership (TCO) over 3 years from the very first budget line.
The TCO structure over 3 years
Taking the build as base 100, here is how cumulative items break down over 3 years (order of magnitude 2026, in CAD).
| Item | Share of build over 3 years | Nature |
|---|---|---|
| Initial development (build) | 100 % | One-off |
| Maintenance / bug fixes | 30-50 % | Recurring |
| Functional enhancements | 20-40 % | Recurring |
| Hosting + infrastructure | 5-15 % | Recurring |
| Third-party licences / APIs | 5-20 % | Recurring |
| Security / compliance | 3-10 % | Recurring |
An app budgeted at CAD 80,000 for the build therefore costs between CAD 128,000 and CAD 176,000 over 3 years once all items are combined.
Worked example and underestimation traps
Here is a detailed TCO for a medium-sized business application, with the traps that derail the budget.
| Item | 3-year cost (CAD) | Underestimation trap |
|---|---|---|
| Initial build | 80,000 | Scope under-defined |
| Maintenance (24 months) | 32,000 | Left out of budget |
| Enhancements | 24,000 | Unplanned requests |
| Hosting | 9,600 | Scaling up |
| Licences / APIs | 12,000 | Vendor price hikes |
| Security / audits | 6,600 | Late compliance |
| Total 3-year TCO | 164,200 | +105 % vs build |
The classic trap: signing an CAD 80,000 build quote thinking you have paid for everything, then discovering CAD 84,000 of unbudgeted recurring costs.
Mini case study
Daniel, CIO of a mid-market logistics firm in Toronto, approves a fleet-tracking app. Build: CAD 80,000. His first budget version stops there. The CFO demands a 3-year TCO.
Daniel recalculates: maintenance at CAD 16,000/year (32,000), enhancements 24,000, hosting 9,600, mapping licences 12,000, security audits 6,600. Total TCO: CAD 164,200, or +105 % versus the build. By factoring these in upfront, he negotiates a degressive maintenance package and shared hosting, bringing the TCO to CAD 144,000. Above all, he avoids an embarrassing budget overrun in year 2.
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FAQ
What share of TCO is the initial development alone?
About 45 to 60 % of the total cost over 3 years. The rest splits between maintenance, enhancements, hosting and licences, all recurring.
How much should I budget for annual maintenance?
As an order of magnitude, 15 to 20 % of the build cost per year. For an CAD 80,000 app, plan CAD 12,000 to 16,000 of annual maintenance.
Is hosting really a significant item?
It represents 5 to 15 % of the build over 3 years, more with heavy scaling or high-availability requirements. Anticipate it from the scoping stage.
How do I avoid underestimating TCO?
Require a 3-year TCO table in every quote, including maintenance, enhancements, hosting and licences. Add a 15 to 20 % contingency reserve.
Can third-party licences blow up?
Yes: mapping, payment or AI APIs often bill by usage. Check the pricing grid and simulate your 3-year volume to avoid nasty surprises.
Let's scope your project. Describe your target app and its expected usage: we deliver a transparent 3-year TCO, build and recurring costs included. 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.
