Co-managed vs fully managed IT, explained for New Zealand business

When a business decides to bring in a managed provider, there is a second question right behind the first: how much should the provider run, and how much stays with us? The two common answers are co-managed and fully managed. They are not better or worse than each other. They suit different organisations, and the right one depends on whether you already have internal IT capability you want to keep.

The difference is simple to state. In a fully managed arrangement, the provider is your IT department. In a co-managed arrangement, the provider works alongside an internal IT person or team, sharing the load. Belton delivers both, and moves clients between them as they grow. This page explains each model, who it suits, and how to choose. For the broader hire-versus-partner question, see our managed IT vs in-house comparison.

Co-managed suits you if you already have IT capability

If you have a capable internal IT person, or a compact team, co-managed lets you keep them and make them far more effective. They keep the deep business context and the walk-up relationship. We add the specialist depth they cannot cover alone: security, cloud, identity, network security and large projects. Crucially, your person stops being a single point of failure. When they take leave or go off sick, support and monitoring keep running.

Fully managed suits you if you would rather not run IT

If you have no internal IT function, or you want your people focused entirely on the business rather than on technology, fully managed is the clean answer. We run everything: the help desk and remote support, endpoint protection, backup, Microsoft 365 and the strategic planning that keeps you ahead. You get a whole department for the cost of part of one salary, with nothing to recruit or manage.

The deciding question is short: do you have internal IT capability you want to keep, or not? That answer points to the model.

Most organisations know which side of that line they sit on. The ones in between, growing, with a stretched internal person who cannot cover everything, are often the strongest fit for co-managed, because it relieves the pressure without losing the person.

Whichever model you choose, the engine behind it is the same. You draw on a 40-strong senior team, a 24/7 SOC capability, a 15-minute critical response target in business hours, and a security posture built on Essential Eight and ISO-aligned controls. We are a Microsoft Solutions Partner for Modern Work and a member of the Microsoft AI Cloud Partner Program, with average client tenure beyond ten years and customer satisfaction around 97% over the last 90 days.

In co-managed, we agree clear lines: what your internal person owns, what we own, and where we collaborate. They get a senior team behind them, a shared toolset, and an escalation path that never sleeps. In fully managed, we simply take the whole function: onboarding, day-to-day support, automation, advisory and the long-term roadmap. Either way, the standard of service is identical.

The model is how we engage. The team, the tooling and the standard behind it never change.

Already running IT internally? Co-managed is built for you. Want it all handled? Fully managed is the clean answer. A discovery session is the quickest way to settle which one fits, and to see the industry experience we bring to it.