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How to write a data classification policy

A data classification policy labels information by sensitivity so handling rules apply consistently. Here is what to include — levels, handling, labelling — with a free template.

Why classification underpins everything else

You cannot protect data consistently if you have not decided how sensitive it is. A data classification policy assigns information to levels and defines how each level is handled, stored, shared and destroyed. It is the foundation other policies (access control, encryption, retention) build on.

What to include

  1. Classification levels — a simple, usable scale (e.g. Public, Internal, Confidential, Restricted). Fewer levels get used; too many get ignored.
  2. Criteria — clear examples of what belongs in each level.
  3. Handling rules — per level: storage, transmission, encryption, sharing and printing.
  4. Labelling — how documents and data are marked.
  5. Roles — data owners decide classification; everyone applies the handling rules.
  6. Declassification and retention — when data moves down a level or is destroyed.
  7. Third parties — how classification travels to suppliers.

Common mistakes

  • Too many levels, so people default to the lowest or ignore them.
  • Defining levels but not the handling rules that make them meaningful.
  • No owner, so nothing actually gets classified.

Framework alignment

Maps to ISO 27001:2022 Annex A 5.12–5.13 (classification and labelling of information), the SOC 2 confidentiality criteria, and NIST CSF Identify/Protect.

Generate it in minutes

See a sample data classification policy or generate yours free.