Information Security

Everything you need to know about retention periods: a complete overview

Retention periods are an important part of data management. Whether you're a business owner, IT specialist, security officer, or policy maker, it's important to know how long to keep certain documents and data. The rules are often complex and depend on the type of information and the laws that apply to it. In this blog, we provide an overview, practical tips and tools to get you started.
This article was last updated on
10/3/2025

Why are retention periods important?

Compliance with retention periods is necessary for organizations. On the one hand, you may not retain data longer than necessary, while on the other hand, certain laws require data to be retained for a certain period of time. It is therefore important to delve into this and organize retention periods properly within your organization. Here are three important reasons why:

1. Security and privacy

By keeping data for too long, you increase the risk of data breaches and unauthorized access. Under the General Data Protection Regulation (AVG), you are required to keep personal data no longer than necessary for the purpose for which it was collected.

2. Legal obligations

Various laws, such as the Tax Code, the Archives Act, and the Medical Treatment Agreement Act (WGBO), dictate how long you must keep certain records. Failure to comply with these rules can lead to penalties or legal problems.

3. Risks of noncompliance.

Failure to properly comply with retention periods can result in:

  • Fines: Authorities such as the Personal Data Authority can impose large fines.
  • Reputational damage: Leaking outdated data can damage customer and partner trust.
  • Legal claims: Insufficient documentation can lead to problems in audits or lawsuits.

Overview of key retention periods

To make it clear, we have categorized the retention periods by category. This helps you quickly determine which rules apply to your organization.

Personal data (AVG/GDPR).

  • Application data
    Retention period: 4 weeks (without consent)
    Legislation: AVG
  • Personnel files
    Retention period: 2 years after leaving employment
    Legislation: AVG
  • Copy ID proof
    Retention period: Maximum 5 years after leaving employment
    Legislation: AVG

Administration and Taxation

  • Financial-administrative data
    Retention period: 7 years
    Legislation: Tax legislation
  • Invoices
    Retention period: 7 years
    Legislation: Tax legislation
  • Financial statements
    Retention period: 7 years
    Legislation: Tax legislation

Legal

  • Contracts
    Retention period: 5 to 20 years (depending on type)
    Legislation: Civil Code
  • Warranty claims
    Retention period: Up to 5 years after expiration
    Legislation: Civil Code

Care

  • Medical records
    Retention period: At least 20 years after last contact
    Legislation: WGBO
  • Patient files (academic)
    Retention period: Up to 115 years after date of birth
    Legislation: Archives Act
  • Psychiatric medical records
    Retention period: Minimum 5 years after discharge
    Legislation: WGBO
  • Work-related medical records
    Retention period: Minimum 15 years after exposure
    Legislation: Working Conditions Act
  • Research data
    Retention period: Minimum 15 years after study
    Legislation: EU Clinical Trials Regulation
  • Medical data workers in contact with hazardous substances
    Retention period: Minimum 40 years
    Legislation: Working Conditions Act

How do you determine what to keep and what to destroy?

Managing retention periods can be complicated. Here are three practical steps you can take to get a handle on your data management:

1. Establish a retention policy

Have a clear retention policy that meets the legal requirements and needs of your organization. This policy should specify what data will be kept, for how long, and when it will be destroyed.

2. Make use of tools and software

There are several tools available to help you manage retention periods. For example, these tools can automatically alert you when data needs to be destroyed or archived. Task management systems, for example, are great for this, in addition, they are also suitable for implementing an ISO management system, read all about this combination in the next blog.

3. Check regularly

It is important to periodically evaluate your data and delete outdated information. This prevents you from running unnecessary risks and allows for more efficient data management.

How we can help you ensure retention periods

To help you comply with retention periods, we offer a number of practical tools:

1. AVG scan

Our AVG scan helps you understand how your organization handles personal data and retention periods.

2. Template for retention policy.

Download our handy retention policy template and get started organizing your data management right away.

3. Customized advice

Do you have specific questions about retention periods or implementing a retention policy? Feel free to contact us for an introductory discussion.

Put today the first to compliance

Properly managing retention periods is necessary for compliance with laws, protecting privacy, and avoiding risk. Establishing a good retention policy and reviewing it regularly will keep your organization compliant, efficient and secure.

Have questions or want to get started right away? Download our retention policy template or contact us for an informal meeting. Together we'll make sure your organization is fully compliant!

Kilian Houthuijzen
Account Manager
085 773 60 05
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