The verdict in three sentences
For 800 subscriptions, a custom subscription billing web app costs around CAD 25,000 to 70,000 in the Toronto market (2026 estimate), delivered in 6 to 12 weeks, against 0.5 to 0.8 % of billed revenue with Chargebee or Stripe Billing. Custom becomes cost-effective once billed volume exceeds roughly CAD 1.5 million a year or your rules (proration, commitments, indexation, multi-site accounts) fall outside what a standard SaaS handles. Either way, sales tax logic (HST, GST, QST) and pre-authorized debit compliance must be designed in from day one, not bolted on.
Tax and payment rules a Canadian billing app must handle
Canada has no e-invoicing mandate comparable to Europe in 2026, but billing across provinces is still a compliance topic. A Toronto company invoicing clients in Ontario, Quebec and the West applies different rates, and recurring debits follow Payments Canada rules.
| Requirement | Detail (2026) | Impact on the app |
|---|---|---|
| HST Ontario | 13 % | Rate by client's province of supply |
| GST plus QST Quebec | 5 % plus 9.975 % | Two tax lines, separate registration numbers |
| GST only (Alberta, territories) | 5 % | Rate table by province |
| Pre-authorized debit (PAD) | Agreement, 10 days' notice for amount changes | Mandate storage, automated notices |
| French-language invoices for Quebec clients | Charter of the French Language | Bilingual invoice templates |
| Record retention | 6 years (CRA) | Archiving and export |
These rules are not exotic, but in a SaaS tool they often mean add-ons such as Avalara or TaxJar at USD 50 to 500 a month, on top of the billing platform.
Custom or SaaS: the three-year math
The comparison only makes sense over 3 years, because SaaS is cheap at the start and expensive at scale.
| Cost item (2026 estimate) | Chargebee or Stripe Billing | Custom |
|---|---|---|
| Setup | CAD 3,000 to 12,000 (configuration, integration) | CAD 25,000 to 70,000 |
| Variable cost | 0.5 to 0.8 % of billed revenue | 0 % |
| Fixed subscription | USD 0 to 600 per month depending on plan | Hosting CAD 75 to 300 per month |
| Maintenance | Included | 10 to 15 % of build per year |
| Payment fees (card, PAD) | 0.5 to 2.9 % plus fixed fees | Same |
| Specific business rules | Workarounds, scripts, limits | Coded to your contracts |
| Data and code ownership | No | Yes |
As a reference point, Kolonell's grid places this kind of application in the medium tier, 4,000,000 to 7,000,000 FCFA (6,100 to 10,670 EUR), or the complex tier, 7,000,000 to 15,000,000 FCFA (10,670 to 22,870 EUR) if the client portal, multi-entity billing and tax engine are included. Kolonell maintenance is 35,000, 75,000 or 120,000 FCFA per month depending on the level.
The features that justify going custom
A serious recurring billing app covers the full cycle: plan catalogue, contracts with commitment terms, proration on upgrade, annual price indexation (CPI-linked clauses), PAD with stored agreements, automatic dunning at day 3, 10 and 30, credit notes, accounting export to QuickBooks, Xero or Sage, and MRR, churn and receivables dashboards. The costliest part of custom work is usually exception handling: a client billed across several sites, a negotiated discount over 18 months, a temporary suspension. That is also where a standard SaaS forces workarounds.
Mini case study
Illustrative example: Sarah, CFO of an IT maintenance company in Toronto, bills 800 contracts at an average CAD 220 a month, i.e. CAD 2,112,000 a year. Her team spends 4 days a month on billing and collections.
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- Stripe Billing at 0.7 %: about CAD 14,800 a year, i.e. CAD 44,400 over 3 years, plus CAD 7,000 of integration, total CAD 51,400.
- Custom at CAD 45,000, plus maintenance of CAD 5,500 a year and hosting of CAD 1,800 a year: CAD 66,900 over 3 years.
- Time saved in both options: 4 days a month down to 1, i.e. 36 days a year freed.
With 20 % annual subscription growth, the Stripe Billing cost over 3 years rises to about CAD 60,800 including integration, and the gap shrinks to about CAD 6,000. Custom wins clearly beyond 1,200 contracts, or if indexation and multi-site rules require in-house scripts on the SaaS.
FAQ
Does Canada require e-invoicing in 2026?
No federal mandate exists in 2026, but CRA requires 6 years of record retention and complete tax details on each invoice. Designing for structured invoice data now also prepares you for European clients, who face mandates from 2026.
How long does it take to migrate 800 subscriptions?
Plan 2 to 3 weeks: contracts, PAD agreements and billing dates. Existing PAD agreements stay valid if the payee does not change.
Does Chargebee handle CPI indexation?
Not natively: you need a script or an annual price update, repeated for each affected contract. On 800 contracts that is 1 to 2 days of work a year.
What uptime should we target?
Recurring billing runs in batches, overnight or on the 1st of the month: 99.5 % uptime is enough. What matters is recovery, with daily backups kept for 30 days.
Can we keep Stripe for collections?
Yes, it is even recommended: the custom app manages contracts and invoices, Stripe or a PAD processor collects. You then pay only payment fees, not the 0.5 to 0.8 % of Billing.
Let's scope your project. Tell us your subscription volume, billing rules and accounting tool to get a precise scope, a migration plan and a side-by-side comparison with your current SaaS. Detailed quote within 48 h via our free quote page. 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.
