These are the key topics covered in this guide:
- Are you legally required to appoint a DPO?
- What does a DPO actually do?
- Internal DPO: when it makes sense
- External DPO: when it makes more sense
- Cost comparison
- When to switch from external to internal
- Common mistakes startups make
- How PrivaLex can help
As your startup grows and starts handling more personal data, from users, employees or partners, one question comes up consistently: do we need a Data Protection Officer (DPO)? And if so, should we hire one in-house or outsource the role? The answer depends on your legal obligations, the type of data you process, your risk profile and your available resources. This guide walks through everything you need to know to make the right decision for your stage.
Are You Legally Required to Appoint a DPO?
Under Article 37 of the GDPR, appointing a DPO is mandatory in three cases:
- Public authority or body: processing is carried out by a public authority or body (with certain exceptions for courts acting in a judicial capacity).
- Large-scale regular and systematic monitoring: the core activities of the controller or processor require regular and systematic monitoring of individuals on a large scale (for example, behavioural advertising, scoring or user tracking).
- Large-scale processing of special categories or criminal data: core activities involve large-scale processing of sensitive data under Article 9 (health, biometric, genetic data, etc.) or criminal conviction data under Article 10.
If none of these apply, you are not legally required to appoint a DPO. But many startups choose to do so voluntarily, to demonstrate accountability to clients and investors, to meet requirements of certifications like ISO 27001 or ISO 27701, and to be prepared for audits before they become pressure events.
What Does a DPO Actually Do?
The DPO’s role is defined in Articles 37 to 39 of the GDPR. It is strategic and supervisory, not operational. A DPO does not make processing decisions, they advise, monitor and act as the bridge between your organisation, your data subjects and the supervisory authority. Key responsibilities include:
- Informing and advising the organisation and its staff of their obligations under the GDPR and other data protection laws
- Monitoring compliance with the GDPR, including managing internal data protection activities, training staff and conducting internal audits
- Advising on and reviewing Data Protection Impact Assessments (DPIAs) where required
- Acting as the contact point for data subjects exercising their rights
- Cooperating with and acting as the point of contact for the supervisory authority (in Spain, the AEPD)
Critically, the DPO must have genuine independence. The GDPR requires that they do not receive instructions regarding the exercise of their tasks, and that they are not penalised for performing their role. This independence requirement is one of the main reasons outsourcing the DPO role works well for many organisations.
Internal DPO: When It Makes Sense
Hiring a full-time internal DPO can be the right decision when:
- Your data processing is highly complex: you handle large volumes of sensitive data (health, financial, biometric) and the role genuinely requires full-time attention.
- You operate in a heavily regulated sector: fintech, healthtech, legaltech or any sector where privacy is core to the business model and daily decisions.
- You are at scale: you have the volume of processing activity, the budget and the organisational complexity to justify a dedicated internal function.
- You face continuous regulatory pressure: you are regularly subject to supervisory authority inquiries, client audits or contractual privacy obligations that require an always-available internal lead.
The challenge is finding the right person. A qualified DPO needs legal expertise in data protection law, technical understanding of how your systems and data flows work, and the ability to operate with independence from the rest of the organisation. That combination is difficult to hire for and expensive to retain.
External DPO: When It Makes More Sense
For most startups and growing companies, an external DPO is the more practical and efficient option. The GDPR explicitly permits the DPO role to be outsourced to an external service provider (Article 37(6)), provided the contract ensures proper independence, confidentiality and access to necessary information.
The advantages of outsourcing are concrete:
- Immediate expertise: you gain access to specialist knowledge from day one, including experience across sectors, supervisory authority interactions, breach management and DPIA processes.
- Genuine independence: an external DPO is structurally independent from your internal hierarchy, which makes it easier to meet the GDPR’s independence requirements.
- Cost efficiency: you pay for the service rather than a full-time salary, employer contributions and training costs.
- Flexibility: the service scales with your needs. You are not locked into a fixed headcount when your privacy obligations change.
- Speed: instead of a recruitment process that can take months, you can have an external DPO in place within days.
Cost Comparison
Hiring an internal DPO in Spain typically involves a gross salary in the range of €45,000 to €75,000 per year, depending on experience and sector, plus employer Social Security contributions, ongoing training and any specialist tools required. Senior profiles with ISO 27001 and GDPR depth at the top of the range.
An external DPO service typically operates on a fixed monthly fee adapted to your organisation’s size, risk profile and the level of support needed. For most startups and SMEs, this is substantially more cost-effective than a full-time hire, and the service can be scaled up or down as your needs evolve. Contact PrivaLex to discuss what a service tailored to your stage would look like.
When to Consider Moving from External to Internal
Some organisations eventually bring the DPO role in-house. This typically makes sense when:
- You are undergoing significant international expansion and need a dedicated privacy lead managing multiple jurisdictions full-time
- You have completed a merger or acquisition and the data integration complexity justifies an internal resource
- You are under sustained, continuous investor or client pressure that makes a full-time internal DPO commercially necessary
- Your organisation has grown to a scale where the volume of daily privacy decisions, DPIAs and training activity genuinely requires a permanent role
Even then, many organisations maintain a hybrid model, an internal DPO supported by an external compliance partner for specialist input, second opinions and coverage during absences.
Common Mistakes Startups Make
Assuming a privacy policy is enough
A privacy policy on your website is a transparency document. It does not constitute a GDPR compliance programme. Without a record of processing activities, defined legal bases, vendor management, staff training and breach procedures, you are exposed regardless of how well-written your policy is.
Appointing a DPO without ensuring their independence
A common mistake is appointing the Head of Legal, CTO or another senior manager as DPO. If that person has decision-making authority over processing activities, there is a conflict of interest. Supervisory authorities have issued guidance and enforcement actions on this point. Independence is not optional.
Treating the DPO appointment as a one-off task
The DPO role requires ongoing engagement, regular reviews of processing activities, training, DPIA support, monitoring of regulatory guidance and availability to staff and data subjects. Appointing someone and then not giving them the time or resources to do the job is a compliance risk, not a solution.
Waiting until a client or investor asks
Privacy gaps discovered during due diligence or an enterprise sales process are significantly harder and more expensive to fix under time pressure. Building your privacy foundation early, with or without a mandatory DPO, avoids that scenario entirely.
How PrivaLex Can Help
At PrivaLex Partners we act as external DPO for startups and established companies across Spain and the EU. We combine legal expertise in data protection with technical understanding of the systems and processes our clients use, and we provide genuine independence as required by the GDPR.
Our external DPO service covers the full scope of Articles 37 to 39: compliance monitoring, DPIA support, staff training, supervisory authority liaison, data subject request management and breach response coordination. We work with your team as a trusted partner, not a distant advisor.
Whether you need an external DPO from day one, are transitioning from an internal arrangement, or want to assess whether outsourcing makes sense for your stage, book a call with PrivaLex and we will give you a clear picture of your options.
Frequently Asked Questions (FAQs)
Can the DPO role legally be outsourced?
Yes. Article 37(6) of the GDPR explicitly permits the DPO to be an external service provider. The contract must ensure that the DPO can perform their tasks with independence and without conflict of interest, and that they have access to management and to all necessary information.
Can the DPO also be the CEO, CTO or Head of Legal?
Not if that person has decision-making authority over processing activities. The GDPR’s independence requirement (Article 38(6)) prohibits the DPO from performing tasks or duties that could result in a conflict of interest. Supervisory authorities across the EU have taken enforcement action on this point. The role must be assigned to someone, internal or external, who does not determine the purposes and means of processing.
What happens if we are required to have a DPO and do not appoint one?
Failure to designate a DPO when required under Article 37 is a violation of the GDPR. Supervisory authorities can impose administrative fines of up to €10 million or 2% of total worldwide annual turnover under Article 83(4), whichever is higher. They can also issue warnings, reprimands and binding remediation orders.
How do I know if our processing qualifies as large-scale?
The GDPR does not define a specific numerical threshold for “large-scale”. The Article 29 Working Party (now EDPB) Guidelines on DPOs suggest considering factors including the number of data subjects, the volume of data, the geographic extent of processing and the duration. Processing the data of millions of users of a consumer app is large-scale. Processing employee data for a 50-person company typically is not.
If we have an external DPO, do we still need to register them with the supervisory authority?
Yes. Where a DPO is required under Article 37, the controller and processor must publish the DPO’s contact details and communicate them to the relevant supervisory authority under Article 37(7). The DPO’s name does not need to be published, but their contact details must be accessible to data subjects and the supervisory authority.
Can one external DPO serve multiple organisations?
Yes, under Article 37(3). A single DPO can be designated for a group of undertakings or for several public authorities or bodies, provided the DPO is easily accessible from each. This is the basis on which external DPO service providers like PrivaLex operate.
Next Step
Deciding whether to hire or outsource your DPO is ultimately a question of risk profile, resources and stage. For most startups handling personal data, an external DPO provides the expertise, independence and flexibility the GDPR requires without the overhead of a full-time hire. Book a call with PrivaLex and we will help you make the right call for your organisation.
