GDPR Compliance Requirements: A Complete Overview

The big picture

GDPR can feel like a sprawling list of rules, but its requirements cluster into a manageable set of themes. At heart, you must have a reason to process data, be open about it, keep it secure, respect people’s rights, and be able to prove all of it. Everything else is detail hanging off those pillars.

This guide walks through the main requirements in turn, so you can see the whole picture and check your programme against it.

1. A lawful basis for every activity

You must identify one of six lawful bases — consent, contract, legal obligation, vital interests, public task or legitimate interests — before you process any personal data, and document which applies to each activity. Special category data needs an additional Article 9 condition on top.

Without a valid basis the processing is unlawful, so this is the foundational requirement everything else assumes.

2. Transparency and privacy notices

People have the right to know who you are, what data you collect, why, who you share it with, and how long you keep it. You meet this through a clear, accessible privacy notice, and by informing people within a reasonable time when you obtain their data indirectly.

Transparency is not just a notice on your website — it is the principle that lets people exercise all their other rights.

3. Honouring data subject rights

You must be able to handle the eight data subject rights — access, rectification, erasure, restriction, portability, objection, information, and rights around automated decisions — usually within one month. That means a reliable request workflow, identity checks and the ability to find data across your systems.

Rights handling is one of the most visible requirements, and one of the most common sources of complaints when it fails.

4. Security of processing

Article 32 requires appropriate technical and organisational measures to protect personal data — encryption, access controls, logging, resilience and testing — proportionate to the risk. Security is both a principle and a specific obligation.

Strong, documented security also reduces the likelihood and impact of breaches, which feeds directly into your breach obligations.

5. Records of processing

You must keep a Record of Processing Activities (RoPA) under Article 30 — an inventory of what data you process, why, who you share it with, transfers, retention and security. It is the backbone of accountability and the foundation for most other tasks.

A regulator can ask to see your RoPA at any time, so keeping it current is essential.

6. Data Protection Impact Assessments

For high-risk processing, you must run a DPIA to identify and reduce risks before you start. This includes large-scale special category processing, extensive profiling with significant effects, and large-scale public monitoring.

DPIAs are the practical mechanism through which privacy by design happens on your riskier projects.

7. Breach notification

You must detect, record and, where qualifying, report breaches to your supervisory authority within 72 hours, and notify affected individuals where the risk to them is high. This requires a tested incident-response plan and clear internal escalation.

The tight 72-hour window means breach readiness cannot be improvised when an incident hits.

8. Contracts with processors

Whenever you use a processor — cloud, SaaS, payroll — you must have a Data Processing Agreement under Article 28 setting out the required terms. Processors, in turn, need permission for sub-processors and must support you on security, rights and breaches.

Operating without these contracts is itself a breach, so they should be in place before data flows.

Handled well, this is one more building block of practical GDPR compliance.

9. International transfers

If you move personal data outside the EU/EEA to a country without an adequacy decision, you need a valid transfer mechanism — Standard Contractual Clauses, the EU–US Data Privacy Framework, or another safeguard — plus, in some cases, a transfer risk assessment.

With data flowing through global cloud services, most organisations have transfers to account for whether they realise it or not.

10. A DPO where required

You must appoint a Data Protection Officer if you are a public authority, or your core activities involve large-scale monitoring or large-scale special category processing. Where one is not required, you still need someone accountable for privacy.

Getting this decision right — and appointing the DPO properly where needed — is part of your governance obligations.

11. Privacy by design and accountability

Two overarching requirements tie the rest together. Privacy by design and by default (Article 25) means building data protection into systems from the start. Accountability means being able to demonstrate compliance through records, policies and evidence — not merely claiming it.

These are the requirements that turn GDPR from a checklist into an ongoing discipline.

Putting it together

No single requirement is overwhelming; the challenge is covering them all and keeping them current. The efficient path is to start with a data inventory (your RoPA), assign lawful bases and retention, stand up rights and breach processes, secure your data and contracts, and document as you go.

Approached this way, the requirements reinforce each other rather than competing for attention.

How ISpectra helps

Meeting the full set of GDPR requirements — and proving it — is exactly what credible GDPR compliance looks like. ISpectra Technologies helps organisations assess their current state against every requirement, prioritise the gaps, and build a proportionate programme that covers lawful basis, rights, security, records, transfers and accountability.

A short gap assessment will show you precisely where you stand against each requirement.

In one paragraph

GDPR’s requirements come down to a coherent set: have a lawful basis for every activity; be transparent through privacy notices; honour the eight data subject rights; secure data under Article 32; keep a RoPA; run DPIAs for high-risk processing; report qualifying breaches within 72 hours; sign DPAs with processors; use valid transfer mechanisms for data leaving the EU; appoint a DPO where required; and build in privacy by design and accountability throughout. Start with a data inventory, work through each requirement, document as you go, and keep it current.

Don’t forget retention and consent management

Two requirements often slip through the cracks because they are ongoing rather than one-off. The first is data retention: the storage-limitation principle requires you to keep personal data only as long as you need it, set documented retention periods, and delete or anonymise data when its purpose is served. A retention schedule turns this from a vague principle into an operational rule.

The second is consent management. Where you rely on consent — for marketing or non-essential cookies, for example — you must capture it to the GDPR standard, keep records of who consented to what, and make withdrawal as easy as giving consent. Both retention and consent need maintenance, not just a one-time setup, which is why they are best supported by clear processes and, where volume justifies it, tooling.

Requirements are a programme, not a project

The final thing to understand about GDPR requirements is that they describe an ongoing programme, not a project with an end date. Lawful bases, records, retention, vendor contracts, security and consent all drift as your business changes — new products, new tools, new markets, new staff. Meeting the requirements once and walking away is the surest route back to non-compliance.

The organisations that stay compliant treat data protection as business as usual: privacy questions in design reviews, vendor checks at renewal, periodic reviews of records and retention, and regular training. Framed this way, the requirements stop being a daunting list and become a set of routines that quietly keep you on the right side of the law.