Data Protection Officer Duties Under UK GDPR: What Businesses Need to Know

If you’re running a growing business, it’s normal to hit a point where “we should probably think about GDPR” turns into “we need someone to own this”.

That’s where the Data Protection Officer (DPO) often comes in.

But small business owners regularly ask the same practical question: what are a Data Protection Officer’s responsibilities under the UK GDPR, and what does that mean for your day-to-day operations?

In this guide, we’ll break down:

• when you might need a DPO (and when you probably don’t),
• the core responsibilities of a DPO under UK GDPR,
• how a DPO should work with your team (without becoming the “GDPR police”), and
• the common mistakes businesses make when appointing a DPO.

Getting this right can save you a lot of stress later-especially when you start handling more customer data, hire staff, run marketing campaigns, or adopt new tech.

Do You Actually Need A Data Protection Officer?

Before we dive into a DPO’s responsibilities, it’s worth checking whether you need a DPO at all.

Under the UK GDPR (supported by the Data Protection Act 2018), you must appoint a DPO in certain circumstances, including where:

• you’re a public authority (with some exceptions),
• your core activities involve regular and systematic monitoring of individuals on a large scale (for example, behaviour tracking, large-scale analytics tied to identifiable users, or extensive profiling), or
• your core activities involve large-scale processing of special category data (like health data) or data relating to criminal convictions and offences.

In practice, many small businesses don’t strictly fall into these categories. However, some do-particularly in:

• health and wellbeing (clinics, therapists, online health services),
• recruitment and HR tech,
• security and surveillance services,
• education platforms,
• fintech and insurtech, and
• marketing/adtech businesses that track users across platforms.

Even if you’re not legally required to appoint a DPO, you can still choose to appoint one. That can be helpful if you want clear accountability, better governance, and a consistent approach to privacy decisions.

Tip: Appointing a DPO is not the same as “having someone who does GDPR”. If you don’t meet the DPO requirement, you might instead assign privacy tasks to a responsible person (like an operations lead) without formally designating them as a DPO.

Data Protection Officer Responsibilities Under UK GDPR

If you’re looking into Data Protection Officer responsibilities, you’re usually trying to understand two things:

• what the law expects a DPO to do, and
• what you, as the business owner, need to put in place so they can do it.

The DPO’s main responsibilities come from Article 39 of the UK GDPR. In plain English, the DPO’s role is to help your business comply with data protection law and to act as an independent privacy advisor internally.

1) Informing And Advising The Business About Its GDPR Obligations

A DPO is responsible for informing and advising your business (and your employees) about your obligations under the UK GDPR and other data protection laws.

In day-to-day terms, that may include:

• helping you understand what personal data you collect and why,
• advising on your lawful basis for processing (e.g. contract, legal obligation, legitimate interests, consent),
• flagging high-risk processing activities early (before you launch something), and
• reviewing privacy notices and internal policies.

For many SMEs, the DPO becomes the person who can translate “legal requirements” into “what we actually need to do this week”. This often overlaps with having a properly drafted Privacy Policy and aligned internal processes.

2) Monitoring Compliance (Including Policies, Training, And Audits)

Another key responsibility in a DPO role is monitoring compliance. That doesn’t mean they personally do every task-it means they oversee and check whether your business is meeting its obligations.

Monitoring compliance can include:

• reviewing and updating privacy policies and procedures,
• ensuring staff training happens and is recorded,
• running periodic audits (e.g. checking access controls, retention practices, marketing compliance), and
• checking that you only collect the data you actually need.

If your team uses company devices or systems, compliance monitoring often connects with practical workplace rules-like having an Acceptable Use Policy that sets expectations around data handling, device use, and security behaviour.

3) Advising On Data Protection Impact Assessments (DPIAs)

A DPIA is essentially a structured risk assessment for privacy.

A DPO’s responsibilities include advising on DPIAs-especially where you’re doing something new, sensitive, or potentially intrusive (like introducing new monitoring tech, launching a new app feature, or processing health information).

In practice, a DPO may:

• help decide whether a DPIA is required,
• guide your team through identifying privacy risks,
• recommend measures to reduce risk (technical and organisational), and
• document outcomes so you can demonstrate compliance later.

For small businesses, this is a major “future-proofing” function. It’s often easier to build privacy safeguards into a project early than to retrofit them after a complaint or incident.

4) Cooperating With The ICO (And Acting As A Contact Point)

The DPO is usually the main contact point for the Information Commissioner’s Office (ICO) on privacy-related matters.

This can include:

• responding to ICO queries,
• supporting investigations (if they occur), and
• helping your business communicate clearly and promptly with the regulator.

This doesn’t mean the DPO “takes the heat” for everything. Your business (as controller or processor) remains responsible for compliance. But a good DPO can make the difference between an organised response and a messy one.

5) Supporting Individuals’ Rights Requests (Like SARs)

Data protection isn’t just about security-it’s also about how you respond to individuals. That includes customers, users, and employees.

A DPO will often advise on and oversee how your business handles:

• subject access requests (SARs),
• requests to correct data,
• requests to delete data (where applicable), and
• objections to marketing or certain processing activities.

Even if you don’t get many requests, you still need a reliable process. It’s common to formalise this with tools and templates like an Access Request Form, so your team knows what to do (and can keep a record).

6) Helping Manage Data Breaches And Incident Response

Most businesses worry about data breaches for obvious reasons. But the risk isn’t only external hacking-many breaches are internal, accidental, or caused by poor processes (sending an email to the wrong person, misconfigured sharing settings, lost devices, etc.).

While the DPO is not necessarily the person “fixing” the breach, they often advise on and support your incident response by helping you assess:

• how to assess the risk to individuals,
• whether you need to notify the ICO (usually within 72 hours if required),
• whether affected individuals need to be notified, and
• how to prevent repeat incidents.

It’s much easier if you already have a clear plan in place, like a Data Breach Response Plan.

How A DPO Should Fit Into A Small Business (Without Slowing You Down)

One concern we hear from founders is that appointing a DPO will add another layer of approvals and slow the business down.

Done properly, it shouldn’t.

Under the UK GDPR, a DPO needs to operate with a level of independence. That means:

• they shouldn’t be instructed on how to perform their tasks,
• they should report to the highest management level (for SMEs, usually the directors/founders), and
• they shouldn’t be penalised for raising privacy risks.

At the same time, your DPO needs to understand the commercial reality of running a small business. The best approach is often to set up a simple workflow, such as:

• a short privacy review step in your product/project checklist,
• a monthly or quarterly compliance check-in, and
• clear rules on “when to involve the DPO” (e.g. new software systems, new marketing channels, new categories of data).

Internal DPO vs External DPO

Small businesses often choose between:

• Internal DPO (an employee takes on the role), or
• External DPO (outsourced professional).

There’s no one-size-fits-all answer. An internal DPO can be close to the business and fast to respond, but you need to watch for conflicts of interest. For example, someone who decides “why” and “how” personal data is processed (like a head of marketing or IT lead) may not be appropriate as DPO.

An external DPO can bring expertise and independence, which is often appealing when you’re scaling quickly or operating in a higher-risk sector.

Common Mistakes Businesses Make With DPO Responsibilities

Understanding a DPO’s responsibilities is one thing-setting the role up properly is another.

Here are some common mistakes we see SMEs make:

Appointing A DPO In Name Only

Some businesses “tick the box” by naming someone the DPO but don’t give them time, resources, or access to decision-makers.

That’s risky because a DPO can’t do the job properly without real support from leadership.

Giving The DPO Conflicting Responsibilities

Independence matters. If your DPO is also the person driving aggressive growth experiments (or deciding how monitoring is implemented), you could end up with a conflict.

This can come up in workplaces using staff monitoring tools. If you’re implementing monitoring, make sure you’re thinking about both employment law expectations and privacy compliance. For example, if you’re considering computer monitoring, it’s worth understanding the risks around monitor employees’ computers and keeping your approach proportionate and transparent.

Assuming The DPO Is Personally Liable For GDPR Compliance

This one is important: appointing a DPO doesn’t shift legal responsibility away from the business.

Your company (or you, as the controller) remains accountable for compliance. The DPO advises, monitors, and supports-but they’re not a shield you can hide behind.

Forgetting That Staff Personal Data Counts Too

Many SMEs focus on customer data and overlook employee data. But payroll, HR records, performance notes, CCTV footage, and device logs can all be personal data.

If you use CCTV, that can trigger more complex privacy considerations, and you’ll want to ensure your policies and notices are handled carefully. (This often connects with broader workplace surveillance issues like cameras in the workplace.)

Not Updating Policies As Your Business Changes

GDPR compliance isn’t a once-and-done project.

New tools, new suppliers, new hiring, new marketing channels, and new AI use cases can all change your risk profile. Your DPO should help you keep pace, but you also need a process for ongoing review.

If your team is using AI tools, you should also think about confidentiality and personal data risks in practical terms-especially if staff paste customer or employee details into prompts. It’s worth having clear rules and training around this, including guidance on whether ChatGPT is confidential in a business context.

Practical Checklist: Supporting Your DPO To Do The Job Properly

To get value from a DPO (and reduce your compliance risk), you need to set them up for success.

Here’s a practical checklist you can use internally:

1) Give The DPO Direct Access To Leadership

The DPO should be able to raise privacy risks with the people who can actually make decisions-usually directors or founders.

2) Clarify What The DPO Owns (And What They Don’t)

For example:

• DPO owns: advising, monitoring, training guidance, DPIA support, ICO contact, oversight of rights requests.
• Teams own: implementing technical changes, maintaining security systems, customer service responses (with DPO oversight), HR execution.

3) Build Privacy Into Your Business Processes

Rather than asking your DPO to “review everything”, decide the key trigger events where a privacy review is mandatory-like:

• launching a new product feature,
• starting a new marketing campaign,
• onboarding a new software vendor,
• introducing monitoring tools or CCTV,
• expanding into new regions or markets, or
• starting to process special category data (e.g. health data).

4) Keep Your Documentation Simple But Real

UK GDPR compliance is heavily tied to accountability. That means you need to be able to show what you do and why.

Your DPO can help maintain practical records like:

• data maps (what data you hold and where),
• retention schedules,
• processor/vendor lists and contracts,
• training logs, and
• incident logs.

5) Invest In The Basics First

If your foundations are messy, the DPO will spend their time firefighting.

For many small businesses, the “basics” include:

• a clear privacy notice,
• appropriate internal policies (IT use, security, remote work),
• a breach plan,
• a way to handle SARs, and
• appropriate data protection clauses in supplier/customer contracts.

If you want a structured way to build this out, you might look at a complete GDPR Package so your policies and documents match how your business actually operates.

Key Takeaways

• The core responsibilities of a DPO under the UK GDPR are mainly set out in Article 39, including advising the business, monitoring compliance, supporting DPIAs, and acting as a contact point for the ICO.
• If you’re trying to understand what a Data Protection Officer is responsible for, the most important practical point is that a DPO supports compliance-but your business remains legally accountable.
• You only need a DPO in specific situations (such as large-scale monitoring or processing special category data), but some SMEs choose to appoint one voluntarily to strengthen governance.
• A DPO should be independent, have access to senior leadership, and be properly resourced-otherwise the appointment can create more risk than it solves.
• Your DPO will often be involved in advising on rights requests (like SARs) and breach response, so it’s smart to have clear processes and documentation in place early.
• Common DPO mistakes include conflicts of interest, “DPO in name only”, and forgetting employee data and workplace monitoring are also part of data protection compliance.

Disclaimer: This article is for general information only and doesn’t constitute legal advice. If you’d like help setting up your GDPR compliance processes or figuring out whether you need a DPO, you can reach us at 08081347754 or team@sprintlaw.co.uk for a free, no-obligations chat.