Dynamics 365 On-Premises vs Cloud: A 2026 Comparison

If you’re weighing up Dynamics 365 on-premises against the cloud, you’ve probably noticed that most of the guidance online has already decided the answer for you. It’s cloud. It’s nearly always cloud.

We’re going to give you the genuine version, including the parts most partners skip – because for a small number of businesses, on-premises is still the right call, and you deserve to know whether you’re one of them before you commit to a migration that’s hard to reverse.

Here’s the short answer, then the detail.

The short answer

For the large majority of businesses, cloud (Dynamics 365 Online) is now the better choice – lower upfront cost, stronger security, automatic access to new features including AI, and no hardware to maintain. On-premises still makes sense in specific cases: strict data-residency or regulatory requirements that mandate physical control, deep customisations tied to local infrastructure, or environments with genuinely unreliable internet. If none of those apply to you, cloud is very likely the answer. If one of them does, it deserves a real conversation rather than a default.

The rest of this guide is how to tell which camp you’re in.

What the two options actually are

Dynamics 365 Cloud (Online) is hosted by Microsoft in its Azure data centres and accessed over the internet. Microsoft handles the servers, security, backups and updates. You pay a per-user monthly subscription. This is the model Microsoft actively develops – new features, particularly AI, land here first.

Dynamics 365 On-Premises runs on your own servers, in your own environment. You own the infrastructure, control the data physically, and manage updates, security and maintenance yourself (or through a partner). You typically pay upfront for licences rather than by subscription.

Same core capabilities. Very different implications for cost, control, and how much work lands on your IT team – find out how we can support you. 

Dynamics 365 On-Premises vs Dynamics 365 Cloud Comparison 

Cost

The headline difference is upfront versus ongoing. On-premises front-loads the cost – servers, licences, IT resource – as capital expenditure. Cloud spreads it as a predictable monthly subscription (operating expenditure) that bundles hosting, security, backups and upgrades.

On-premises can look cheaper over a long enough horizon if you already own suitable hardware. But the comparison usually flatters on-prem, because the ongoing costs are easy to underestimate: server refresh cycles, patching, security investment, and the IT time to run it all. Cloud’s cost is more visible, which makes it feel higher – but visible isn’t the same as higher.

Cloud wins for most. On-premises can compete only where the hardware already exists and IT capacity is genuinely spare.

Security

This is the one where the instinct is usually wrong. Many businesses assume keeping data physically in the building is safer. In practice, the opposite is normally true.

Microsoft invests in cloud security at a scale no individual business can match – 24/7 monitoring, continuous patching, encryption, and compliance certifications maintained for you. On-premises security is entirely your responsibility, and it’s only as strong as your last update and your smallest gap.

Cloud wins, unless you have a specific regulatory reason that data must physically reside in a particular place under your direct control – in which case on-premises isn’t about better security, it’s about compliance.

Control and customisation

This is on-premises’ strongest card. Full control over your environment, your data’s physical location, and deep customisations tied to local systems. For businesses in tightly regulated sectors, or with unusual integration requirements to other on-site systems, that control can be decisive.

The trade-off: that same control means you carry all the responsibility, and heavy local customisation is exactly what makes systems painful to update and eventually to migrate.

On-premises wins on raw control – but ask honestly whether you need it, or whether it’s just familiar.

Scalability and performance

Cloud scales with a few clicks – add users, add storage, no procurement. On-premises scaling means buying and configuring more hardware, on a timescale of weeks, not minutes.

For any business that grows unevenly, launches new teams, or can’t predict demand a year out, that flexibility is significant. It’s also why cloud tends to perform better under changing load: Microsoft manages the capacity behind the scenes.

Cloud wins, clearly, for any business that expects to change size.

Access to innovation

This gap widens every release. New capabilities – AI-powered insights, Copilot, predictive analytics – arrive in the cloud first, and often only. On-premises deployments fall further behind with each cycle.

If leveraging Microsoft’s AI roadmap matters to you at all, this is close to decisive. On-premises is, increasingly, a decision to opt out of where the platform is going.

Cloud wins, and the margin is growing.

Maintenance and IT burden

Cloud offloads server upkeep, patching and upgrades to Microsoft. On-premises puts all of it on your IT team – and there’s a quieter problem here: skilled people increasingly don’t want to maintain legacy on-prem infrastructure, so recruiting and retaining the talent to run it is getting harder and more expensive.

Cloud wins, and the talent trend makes on-prem harder to sustain over time.

So when does on-premises still make sense?

Cutting through it, on-premises is the right choice in a specific set of cases:

• Regulatory or data-residency requirements that genuinely mandate physical control of where data lives.
• Deep existing customisations or integrations tied to on-site infrastructure that would be costly to unpick.
• Connectivity constraints – environments where reliable internet genuinely can’t be assumed.
• A recent, significant hardware investment you’re not ready to write off.

If one of these is you, don’t let anyone rush you to cloud. If none of them is you, the honest answer is that on-premises is probably nostalgia rather than strategy – and the gap will only grow.

A note on migration

Most businesses reading this are not choosing from scratch – they’re on-premises and wondering whether to move. That’s a real project, not a switch to flip, and doing it badly is its own way to fail. Data migration and user adoption are where these moves go wrong, for the same reasons CRM implementations fail generally. Done properly, with the data cleaned first and users brought along, it’s routine. Done in a rush, it recreates every problem you were trying to leave behind.

Frequently asked questions

Is Dynamics 365 cloud-based?

Dynamics 365 is available both as a cloud service (Dynamics 365 Online, hosted by Microsoft) and, for some applications, as an on-premises deployment on your own servers. Microsoft’s development focus – particularly new AI features – is on the cloud version.

Is Dynamics 365 cloud secure?

Yes. The cloud version runs in Microsoft’s Azure environment with 24/7 monitoring, encryption, continuous patching, and compliance certifications maintained by Microsoft – a level of security investment most individual businesses can’t match on-premises.

Is on-premises Dynamics 365 more secure than cloud?

Generally, no. The assumption that physical control means better security is usually mistaken. On-premises security depends entirely on your own resources and diligence. On-premises is about compliance and data residency, not superior security.

Which is cheaper, cloud or on-premises?

Cloud spreads cost as a predictable subscription; on-premises front-loads it as hardware and licences. On-premises can appear cheaper long-term but usually understates ongoing maintenance, security and IT costs. For most businesses, cloud is more cost-effective overall.

Can we move from on-premises to the cloud?

Yes, and most businesses eventually do. It’s a proper migration project – the key risks are data quality and user adoption – but a well-planned move is routine and unlocks the features and scalability on-premises can’t match.

Not sure which is right for you?

The honest answer to “cloud or on-premises?” is “it depends” – and it depends on things specific to your business: your sector, your compliance obligations, your existing setup, and where you’re trying to get to.

QGate helps UK businesses make this call without an agenda, and then handles the deployment or migration properly if you decide to move. If you’d like a straight assessment of which model fits your situation, we’re happy to give one.

→ Explore our CRM deployment and strategy service, or book a discovery call to talk it through.