What SLA Should You Expect from a Managed IT Provider?

If you only read one part of your managed IT contract, read the SLA. It is where vague promises become measurable, enforceable commitments — or where they quietly disappear. Below is what a credible MSP SLA contains, how AMVIA structures ours, and how to compare providers like an IT director buying managed IT support rather than a buyer taking marketing at face value.

What is an MSP SLA?

An MSP SLA (Service Level Agreement) is the section of your managed services contract that defines measurable commitments: how quickly the provider responds, how quickly it resolves, what uptime it guarantees, and what you are owed when it falls short. It turns "we'll look after your IT" into numbers you can hold to account.

A real SLA does three things a sales deck cannot. It separates *response* time (someone acknowledges and starts work) from *resolution* time (the issue is actually fixed) — two very different promises that weak providers blur together. It assigns priority levels so a downed server is not queued behind a password reset. And it attaches consequences, usually service credits, when the provider misses a target. Anything softer than that is an aspiration, not an agreement.

What response and resolution times should an MSP SLA guarantee?

A good MSP SLA tiers issues by business impact and sets a separate response and resolution clock for each. The benchmark AMVIA works to: P1 critical issues responded to within 1 hour and resolved within 4 hours; P2 standard issues within 4 hours; P3 low-priority issues within 8 hours. Critically, these are contractual, not "best efforts".

The distinction between response and resolution is where most weak SLAs hide. A provider can boast a "15-minute response" and still leave you offline for two days, because responding only means a ticket was acknowledged. Insist on a resolution target for every priority tier, and confirm how priority is assigned — it should reflect business impact, not the provider's convenience.

Pair the SLA with a clear escalation path. You want to know — before you sign — who gets called when a P1 resolution target is about to slip, and how that ties into your IT helpdesk and out-of-hours cover.

What uptime should an MSP SLA guarantee?

For managed infrastructure, 99.99% uptime is the benchmark to aim for. The catch most buyers miss is what that percentage actually buys you in real time, and how the provider measures it. Two providers quoting the same number can mean very different things depending on what is in scope and how downtime is counted.

Run the maths before you accept any uptime figure. At 99.99%, that works out at roughly 53 minutes of permitted downtime a year — verify the exact window in your own contract, because a single decimal place changes the answer dramatically. Then nail down three things in writing:

• What's covered — the whole environment, or only the provider's own data centre? Your broadband line and on-site hardware may sit outside the guarantee.
• How it's measured — rolling 12 months or per calendar month? Per-month is stricter and harder to game.
• What you get when it's missed — automatic service credits, or credits you have to claim? Automatic is the standard to hold out for.

Uptime promises are only as good as the recovery plan behind them, so read the SLA alongside the provider's business continuity commitments. A four-nines number means little without tested backups and a defined recovery time.

Should security incident response be in your MSP SLA?

Yes — and it should be the strictest clause in the document. A live cyber attack is a P1 event by definition, so your SLA must classify security incidents at the fastest response and resolution tier, with a dedicated escalation path and clear containment obligations. Treating a ransomware outbreak like a routine ticket is how a contained incident becomes a business-ending one.

UK breach rates make this non-negotiable. The government's annual Cyber Security Breaches Survey consistently finds a large share of UK businesses — around 43% in the latest figures — identifying a breach or attack each year, and the most disruptive incidents carry real cost (the source we worked from cites an average of £3,550 per most-disruptive breach). Confirm the figures relevant to your sector against the government's published survey and follow the NCSC's incident management guidance for what a credible response process looks like.

This is where a single accountable provider earns its keep. One provider, security-first, with Microsoft-certified engineers means the team fixing your outage is the same team containing the threat — no finger-pointing between an IT supplier and a separate security vendor. If your MSP outsources security, make sure the SLA names who owns incident response and how fast they must act. For a fuller view of how managed IT and managed cybersecurity interlock, treat the security SLA as part of the same contract, not a bolt-on.

How do you compare MSP SLAs?

Compare SLAs on substance, not headline numbers. Three tests separate a genuine commitment from marketing: does it distinguish response from resolution, are service credits automatic or claimed, and is security classified separately at the top priority tier? Score every provider against the same checklist and the weak ones surface quickly.

Cost and SLA strength move together — tighter targets need more people and tooling behind them, which is why it pays to read the SLA next to the pricing. Our breakdown of how much managed IT support costs in the UK shows where the money goes, and our managed IT support page sets out the response tiers we actually commit to.

What does the UK managed services market look like?

The UK has a deep MSP market, which is good news for buyers — you have real choice and real bargaining power to demand a strong SLA. UK market data for 2025–2026 records around 12,867 active MSPs employing roughly 343,762 people, an estimated £51 billion in annual sector revenue, and growth of around 9.7% CAGR to 2033.

That maturity matters because SMEs — which make up roughly 99% of UK businesses (UK business population, 2025) — increasingly buy managed IT as a single accountable service rather than stitching together break-fix suppliers. A competitive market means you should never accept a one-sided SLA. If a provider resists putting resolution times and automatic service credits in writing, that tells you how the relationship will run.