The short answer
Many Canadian finance teams still run accounting or ERP software installed on their own servers, such as long-established desktop and server products (Sage 100 is a familiar example). The alternative is cloud ERP, either software as a service (SaaS) from the vendor or the same kind of software hosted for you in a cloud data centre.
Neither is automatically cheaper or safer. On-premise suits organizations with stable needs, capable IT support and a reason to keep systems in-house. Cloud suits organizations that want remote access, fewer servers to manage and regular updates. A hosted option sits in between.
Three deployment models
| Model | What it means | Who runs the servers | Who applies upgrades |
|---|---|---|---|
| On-premise | Software installed on servers you own, in your office or data centre | You or your IT provider | You or your IT provider |
| Hosted (private cloud) | Your licensed or open-source ERP runs on cloud servers dedicated to you | Your hosting or IT provider | Usually your provider, on a schedule you agree |
| SaaS | You subscribe to the vendor's multi-tenant service | The vendor | The vendor, on its schedule |
Open-source ERP such as ERPNext (ERPNext documentation) can be installed on your own servers or run on cloud servers, so the same software can be deployed on-premise or hosted.
The financials face-off
Cost profile. On-premise usually means upfront licences, servers and implementation (capital spending), plus annual maintenance and IT support. SaaS usually means a per-user subscription (operating spending) that includes hosting and upgrades. Compare over five years and include internal staff time, backups, security tools, server replacement, integrations and training. Subscription prices tend to rise with users and modules.
Control and customization. On-premise and hosted systems generally allow deeper customization and direct database access for reporting. SaaS limits customization to what the vendor supports, which protects upgrades but can constrain unusual processes.
Upgrades. On-premise systems often fall behind because upgrades are disruptive and customizations break. SaaS keeps you current automatically, but you must test and adapt to changes you did not choose.
Security. On-premise security is entirely your responsibility: patching, backups, access, physical security. In the cloud, responsibility is shared. The Canadian Centre for Cyber Security explains that the customer remains responsible for user access and data even with SaaS, and remains accountable for its information overall (Cyber Centre). A well-run SaaS provider may offer stronger infrastructure security than a small server room, but weak passwords and broad permissions are still your problem.
Access and continuity. Cloud ERP is available anywhere with an internet connection, which helps remote staff, multiple locations and business continuity. On-premise systems need secure remote access (VPN or remote desktop) and a recovery plan if the server fails.
Integration. Cloud ERPs usually offer modern APIs for banking, payroll, e-commerce and CRM connections. Older on-premise products may rely on file exports or add-ons. Check the specific integrations you need.
Reporting and month-end. Both can support multi-entity consolidation, multi-currency and sales tax reporting (GST/HST, PST, QST), but capabilities vary widely by product and edition. Test your actual month-end reports during evaluation.
Canadian data location and record-keeping
For tax purposes, the CRA requires records to be kept at a place of business or residence in Canada unless it grants permission otherwise, although electronic records may be kept outside Canada if they are accessible from Canada and available to the CRA on request. Records generally must be kept for six years from the end of the last tax year they relate to (CRA).
For personal information, the Office of the Privacy Commissioner says organizations may use service providers, including outside Canada, but remain accountable and must use contracts and other means to provide comparable protection (OPC). Quebec's Law 25 adds assessment requirements before personal information is communicated outside Quebec. Some public-sector bodies and funders set stricter residency rules.
Ask any cloud vendor which region hosts your data, where backups and support staff are located, and whether you can export all your data. A Canadian region supports residency preferences but does not settle every question on its own. This is general information, not legal or tax advice.
When to move to the cloud
Moving is worth considering when:
- Your server or ERP version is approaching end of support.
- Staff work remotely or across several locations.
- Upgrades have been postponed for years because of customizations.
- You struggle to patch, back up and secure the server reliably.
- You need integrations your current product cannot provide.
Staying on-premise may be reasonable when your system is stable and supported, your IT support is capable, integrations are few, and you have specific control or connectivity requirements.
Decision checklist
- Five-year cost compared for on-premise, hosted and SaaS, including internal time
- End-of-support dates for our current software and server known
- Required integrations listed and confirmed for each option
- Month-end and tax reports tested with our own data
- Data location, backup location and support access confirmed in writing
- Record-keeping requirements reviewed with our accountant
- Customizations we truly need identified
- Full data export available if we leave
- Migration plan and parallel-run period agreed
Limitations
This comparison is general. Product capabilities, licensing and hosting options change often, so verify current terms with each vendor. Migration itself carries cost and risk; plan data cleansing, testing and a parallel month-end before switching.
Next step
Our ERP implementation service compares options against your requirements and plans the move. Prometheus ERP, built on ERPNext, can be hosted in a Canadian cloud region through our cloud services. For a structured comparison, use how to evaluate ERP options.
Sources and further reading
Product capabilities and guidance change. These are the primary sources this article relies on, checked on the review date above.
- Where to keep your records, for how long and how to request permission to destroy them early, Canada Revenue Agency
- Guidelines for processing personal data across borders, Office of the Privacy Commissioner of Canada
- Cloud security risk management (ITSM.50.062), Canadian Centre for Cyber Security
- What is ERPNext?, ERPNext documentation (Frappe)
This article is general information, not legal, accounting or security advice for your specific situation. Examples are hypothetical unless stated otherwise.