Service Level Agreements (SLAs): What To Include, How They Work, Common Pitfalls

If you provide services to customers (or rely on a supplier to deliver services to you), you’ve probably come across the idea of a “Service Level Agreement”.

For a small business, an SLA can be the difference between a smooth working relationship and weeks of back-and-forth when something goes wrong.

This guide breaks down how a service level agreement (SLA) works in practice, what you should include, and the common pitfalls we see when SLAs are rushed, copied from templates, or treated as an “extra” rather than part of your core contract.

What Is An SLA In A Business Context (And When Do You Actually Need One)?

An SLA (Service Level Agreement) is a set of service commitments that sets out measurable service standards a supplier must meet, and what happens if they don’t. Depending on how it’s drafted, an SLA may be a standalone contract, or it may only be legally binding if it is properly incorporated into your main agreement (for example, as a schedule).

In a business context, the SLA usually sits alongside your main services contract and focuses on the operational details, such as:

• how quickly support will respond
• what “uptime” or availability levels are required
• how incidents are prioritised
• timeframes for fixes and workarounds
• service credits or other remedies if performance drops

It’s worth clearing up a common misconception: an SLA isn’t just for huge corporates or complex IT outsourcing. Many small businesses need SLAs too, especially if your service is time-sensitive or your customer is relying on you to deliver something continuously (like systems, support, logistics, or managed services).

Typical Situations Where A Small Business SLA Makes Sense

You might consider a Service Level Agreement if you provide or receive services like:

• IT and software support (helpdesk, troubleshooting, managed devices, hosting)
• Digital services (website maintenance, performance monitoring, incident response)
• Operational services (cleaning, facilities, security, maintenance) where response times matter
• Logistics and fulfilment (dispatch windows, delivery targets, turnaround times)
• Professional services retainers (ongoing marketing, SEO, design, finance ops) where you’re promising certain availability

If your customers are asking about “guaranteed response time”, “support hours”, or “what happens if it goes down”, that’s a strong sign you’re heading into SLA territory.

For many businesses, it’s cleaner to put those service levels into a dedicated Service Level Agreement rather than squeezing them into a generic scope of work.

How Do SLAs Work In Practice (And How Do They Fit With Your Main Contract)?

SLAs can be structured in a few ways. The “right” structure depends on what you’re delivering, how often it changes, and how much flexibility you need.

Option 1: SLA As A Schedule To Your Main Services Agreement

This is one of the most common approaches. Your main contract (often a Master Services Agreement) sets the legal framework, and the SLA schedule sets the operational metrics.

Why it works well:

• you can update service levels without rewriting the whole contract (if your contract allows it)
• it’s clear which terms apply generally vs which are service-performance specific
• you can use one main agreement for multiple projects, with different SLAs per service

Where relevant, a Master Services Agreement can handle the broader legal “guardrails” (payment, IP, confidentiality, liability) while the SLA handles response times, availability, and reporting.

Option 2: SLA As A Standalone Agreement

Sometimes the SLA is a standalone document. This can be useful if:

• you’re already working under a “basic” contract and want to add service levels later
• the customer is requesting an SLA in procurement and wants it separate
• multiple parties need to review/approve service metrics independently

The risk here is inconsistency. If your SLA is separate, you need to be extra careful that it doesn’t contradict your main terms (for example, the SLA promises a remedy that your main contract excludes).

Option 3: SLA Embedded Into Your Terms And Conditions

Some businesses include service levels directly in their terms (particularly subscription or managed service businesses). This can work, but it’s easy to make your terms too rigid or too broad.

If your service changes over time, you’ll want a clear process for updates (and clear customer notice rules) so you don’t accidentally lock yourself into outdated service promises.

What Should You Include In A Business SLA? (A Practical Checklist)

A good SLA should be clear enough that:

• your customer understands what they’re getting
• your team can actually deliver it consistently
• you can measure compliance without arguments later

Below is a practical checklist of clauses and concepts that most business SLAs should consider.

1) Service Description And Scope (What’s Covered, What Isn’t)

Start with the basics: what services does the SLA apply to?

• Which systems, locations, products, or deliverables are covered?
• What is specifically excluded (for example, customer-caused issues, third-party outages, or unsupported configurations)?
• Do you provide “best endeavours” support, or support strictly within defined parameters?

This “scope clarity” is one of the biggest dispute-prevention tools you have. Many SLA disagreements happen because the customer assumed something was included, and the supplier assumed it wasn’t.

2) Definitions (Don’t Skip These)

Definitions feel boring, but they matter. If you define key terms properly, you’ll prevent the classic argument of “that’s not what we meant”.

Common SLA definitions include:

• Incident vs Service Request
• Priority levels (P1/P2/P3/P4) and what qualifies for each
• Response time vs resolution time (they’re not the same)
• Business hours, out-of-hours, and public holidays
• Uptime and how it’s calculated (including planned maintenance)

3) Service Hours, Support Channels And Escalation

Spell out how the customer can contact you and when. For example:

• support hours (e.g. Monday–Friday, 9am–5pm)
• channels (email, ticketing system, phone line)
• expected timeframes for acknowledgement
• escalation path if an issue isn’t progressing (including who gets notified and when)

If you’re providing the service, make sure your SLA matches how your team actually works day-to-day. It’s surprisingly common for a business to promise 24/7 coverage in an SLA, without having staffing or outsourcing in place to deliver it.

4) Performance Metrics That Are Measurable

Strong SLAs focus on measurable metrics. Depending on your service, these may include:

• Uptime/availability (e.g. 99.9% monthly availability)
• Response times by incident priority (e.g. P1 response within 1 hour)
• Resolution times or workaround targets (e.g. P1 workaround within 4 hours)
• Turnaround times (e.g. deliverables produced within X business days)
• Quality measures (e.g. error rates, rework thresholds, audit pass rates)

The more specific you can be, the better. If a metric can’t be measured, it can’t really be enforced.

5) Customer Responsibilities (Yes, This Belongs In The SLA)

Many businesses forget to include what the customer must do to help you meet the SLA. This is a major “hidden” risk.

For example, customer responsibilities might include:

• providing timely access to systems, premises, or staff
• maintaining compatible hardware/software
• assigning a nominated contact person
• logging issues with required information (screenshots, error logs, reproduction steps)
• following your security and access processes

If the customer doesn’t meet these obligations, your response/resolution clock may need to pause. If that’s not written down, you can end up “failing” the SLA for reasons outside your control.

6) Reporting, Monitoring And Review Meetings

If the SLA includes uptime commitments or performance targets, it should also set out:

• how performance is measured (your tools, their tools, or both)
• how often you’ll report (monthly/quarterly)
• how disputes about data are handled
• service review meetings (frequency, agenda, who attends)

This turns the SLA into a living operational document, rather than something that only gets looked at when there’s a problem.

7) Remedies For SLA Failures (Service Credits, Refunds, Termination Rights)

This is where SLAs often get misunderstood. An SLA should clearly explain what happens if service levels aren’t met.

Depending on your bargaining position and the type of service, remedies might include:

• service credits (a future discount calculated by reference to the monthly fee)
• partial refunds for specific failures
• mandatory service improvement plans
• step-in rights (rare for small business deals, but sometimes used)
• termination rights if failures persist or reach a defined threshold

Be careful here. If you’re the supplier, you’ll usually want service credits to be the exclusive remedy for SLA failures (so you’re not exposed to open-ended claims). If you’re the customer, you may want the SLA remedies to be in addition to other rights you have under the contract or under law.

This is also the point where it’s important that your SLA aligns with your broader terms on liability, indemnities, and contract remedies. If you’re unsure, a Contract Review can help catch contradictions before they cause a dispute.

8) Data Protection And Security (Often Overlooked)

If delivering the services means you’ll process personal data (customer data, end-user details, employee contact information), you’ll need to think about privacy compliance. In the UK, the key framework is UK GDPR and the Data Protection Act 2018.

Many service relationships need a Data Processing Agreement in addition to the SLA, particularly where one party is processing personal data on behalf of the other.

And if the services involve user accounts, devices, or network access, it can also be sensible to set behavioural rules through an Acceptable Use Policy (for example, to reduce security incidents caused by unsafe user activity).

How To Set SLA Levels That Are Realistic (And Still Commercially Competitive)

A strong SLA isn’t just a list of ambitious targets. It’s a set of promises you can confidently deliver, even when your team is stretched, someone is on leave, or there’s a sudden spike in tickets.

Here’s a practical approach to setting service levels that work for an SLA-led service relationship.

Step 1: Start With Your Delivery Model

Ask yourself:

• Do you actually provide 24/7 support, or “best efforts” out-of-hours only?
• Is support delivered by employees, contractors, or a third party?
• Are there peak periods where response times will be slower?

If your staffing model is still evolving, lock in modest service levels to start, then increase them later once delivery is stable.

Step 2: Separate Response Time From Resolution Time

This is a common trap.

Response time is how quickly you acknowledge and start triaging an issue.

Resolution time is how quickly it’s actually fixed.

Small businesses often can’t promise aggressive resolution times for complex issues (especially where third parties are involved), but they can promise fast acknowledgement and transparent progress updates. That still gives customers confidence without overcommitting.

Step 3: Build In Exceptions That Reflect Reality

Most SLAs need sensible exceptions for things like:

• planned maintenance windows
• force majeure events (events outside reasonable control)
• third-party platform or network failures
• customer delays (waiting for access, approvals, or information)

Exceptions shouldn’t be used to “get out of” performance. But they do need to reflect how services work in the real world.

Step 4: Decide What You’ll Offer As A Remedy (And Budget For It)

If you offer service credits, work out what the maximum exposure is.

For example, if your SLA provides a 10% credit for missing uptime targets, and a 10% credit for missing response times, can those stack? Is there a cap (e.g. credits capped at 20% of the monthly fee)?

This is important cashflow planning for small businesses, particularly subscription or managed service providers.

Common SLA Pitfalls For Small Businesses (And How To Avoid Them)

SLAs can be incredibly useful, but only if they’re drafted and used properly. Below are common pitfalls we see in practice, and what to do instead.

Pitfall 1: Vague Language That Can’t Be Measured

Phrases like “prompt support”, “high availability”, or “industry standard response times” sound fine until there’s a dispute.

Fix: Use measurable targets (hours, percentages, business days) and define how measurement works.

Pitfall 2: SLA Promises That Contradict The Main Contract

This often happens when someone bolts an SLA onto an existing agreement without cross-checking key clauses.

For example:

• the SLA promises refunds, but the main contract says “fees are non-refundable”
• the SLA says the customer can terminate after one failure, but the main contract requires a long cure period
• the SLA offers “unlimited support”, but the scope says “reasonable support” or caps hours

Fix: Make the hierarchy clear (e.g. which document “wins” if there’s inconsistency) and do a full contract alignment check.

Pitfall 3: No Clear Ticketing / Notification Requirements

If the SLA says “P1 response within 1 hour”, you need to know when that 1 hour clock starts.

Does it start when the customer emails their account manager? When the helpdesk receives a ticket? When you confirm severity?

Fix: Define the notification method and the “start time” for measurement.

Pitfall 4: Overpromising To Win The Deal

This is a big one for growing businesses. You want to win contracts, so you agree to tight service levels - and then your team struggles to keep up.

The commercial risk isn’t just service credits. It’s reputation damage, churn, and a strained relationship.

Fix: Offer staged service levels, premium support tiers, or limited-scope commitments that you can confidently deliver.

Pitfall 5: Forgetting Your Own Resourcing And Employment Risks

If you commit to certain hours or response times, your staff (or contractors) need to be able to deliver them. Otherwise, you can end up with internal pressure that causes burnout, high turnover, or messy disputes about out-of-hours work.

Fix: Align SLAs with your internal policies and contracts. If you’re hiring for service delivery, make sure your Employment Contract and policies match the reality of the role (including working hours, availability expectations, and on-call arrangements).

Pitfall 6: Ignoring Privacy And Security Obligations

Even if your SLA is “only” about performance, the services themselves may involve personal data, system access, or sensitive business information.

Fix: Ensure you have the right privacy documents in place (including a Privacy Policy where applicable) and that your operational commitments don’t undermine your security posture (for example, promising rushed access changes without verification steps).

Key Takeaways

• An SLA is a practical tool that helps define and measure service performance in a business relationship, including response times, uptime, and remedies for failure.
• Most SLAs work best as a schedule to a broader services agreement, so your legal framework and your service metrics stay aligned.
• Strong SLAs include clear scope, definitions, measurable metrics, customer responsibilities, reporting, and a realistic remedy structure (often service credits with caps).
• Common pitfalls include vague wording, contradictions between documents, unclear ticketing/notification rules, and overpromising service levels you can’t consistently deliver.
• If the services involve personal data or system access, you should also consider UK GDPR compliance and whether you need a Data Processing Agreement and security-related policies.

This article is general information only and isn’t legal advice. If you’d like help putting an SLA in place (or reviewing one before you sign), you can reach us at 08081347754 or team@sprintlaw.co.uk for a free, no-obligations chat.