P-4 vs P-5 (DIN 66399): Which level to choose for GDPR and personal data?

P-4 vs P-5 (DIN 66399): Which level to choose for GDPR and personal data?

Because this decision is the most important.

When someone searches for " P-4 shredder ," " P-5 micro-cut shredder ," or " GDPR document shredder ," the pain point is always the same: security vs. price . The problem is that buying something "too weak" gives a false sense of security; buying something "too strong" can be a waste of money if the volume is low.

The correct way to decide is to look at:

  • What type of documents are you going to destroy?

  • Risk level (personal data, finances, HR, health, customers)

  • volume and rhythm (how many sheets/week)

  • user comfort (cycle, interlocks, noise)

What do P-4 and P-5 mean (without complicating things)?

DIN 66399 defines security levels for paper (P-1 to P-7). In practice:

  • P-4 (cross-cut “normal”) : destroys into particles small enough for most common personal data scenarios (addresses, invoices, receipts, simple lists).

  • P-5 (microcut) : very small particles. More difficult (and less realistic) to reconstruct. It's the "safe" level when dealing with sensitive data or higher exposure.

Simple rule: P-4 is "good for many things" ; P-5 is "best for serious classified information" .

When P-4 is sufficient (most cases)

P-4 is usually an excellent choice when:

  • You are a private individual and you destroy bills, letters, receipts, documents with your address.

  • You have a small business and you destroy internal guides, picking lists, old labels , drafts with data (but without critical files).

  • You want a good balance between price, speed, and less maintenance.

Typical examples of "P-4 arrives"

  • electricity/telecom bills

  • Bank correspondence (without extremely sensitive information)

  • old shipping labels (name/address)

  • Order printouts with basic data

When does P-5 pay off (even if it's more expensive)?

P-5 makes sense when:

  • You destroy documents containing sensitive or highly critical personal data.

  • Do you have HR/accounting with a lot of paper-based data (tax ID, IBAN, salaries)?

  • Stores client files (contracts, document copies, detailed complaints)

  • The impact of an incident (data exposure) is high.

Typical examples “go from P-5”

  • Customer lists with contact information and history.

  • HR documentation (salaries, contracts, evaluations)

  • accounting reports with complete bank details

  • clinics/lawyers/consulting rooms (where confidentiality is critical)

P-4 vs. P-5: The differences you'll feel every day.

1) Speed ​​and effort

In general, P-5 is more demanding : microcutting cuts "finer," which can:

  • reduce the actual speed a little.

  • The likelihood of interlocks increases if the machine is undersized.

2) Sheets per pass

A common mistake: buying a cheap P-5 grinder and trying to shred leaves "to the limit." Result: it jams, overheats, and ends up unusable.
If it's a P-5, buy with extra capacity (more than you normally need).

3) Basket (will fill up faster)

Micro-cutting generates small particles that occupy the basket differently. In some models, the basket may appear "full" sooner or require emptying more frequently.

How to decide in 60 seconds (mini-guide)

Answer 4 questions:

  1. Do you destroy customer/HR/finance data with details?
    Yes: tilts towards P-5
    No: P-4 almost always arrives.

  2. Do you have a high weekly volume?
    Yes: purchase a machine with the appropriate cycle and capacity (P-4 or P-5, but with a margin).

  3. Will you also destroy cards/paper clips?
    → confirms model specifications (not all models accept everything)

  4. Will the wrecking company be located in an area with customers?
    Noise and speed matter (often P-4 is more comfortable)

Purchase checklist (P-4/P-5)

  • DIN level: P-4 (balance) or P-5 (confidential)

  • Real capacity with a margin (don't buy "at the limit")

  • Reverse/anti-jam function

  • Proper work cycle (so as not to stop all the time)

  • Basket with enough volume for your pace.

  • Shred staples/paper clips/cards (if needed).

  • Warranty and support (important for business use)

FAQ

Is P-4 sufficient for GDPR?
It depends on the type of data and the risk. For many documents with "common" personal data (addresses/invoices), P-4 is a solid choice. For HR and confidential data, P-5 is more secure.

Is P-5 mandatory for companies?
No. But it might be the right option when the impact of data exposure is high or when you destroy highly critical documentation.

Is it worth paying more for P-5 if I have a small volume of luggage?
If your motivation is security (and not volume), it might be worthwhile. If it's just "everyday paperwork," P-4 usually offers better cost/benefit.