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NACE-BEL Migration Helper

Load the official conversion spreadsheet, then paste old NACE-BEL codes. One-to-many mappings stay visible instead of being collapsed.

Local: yes. Your input stays on your device and is not sent to an external service for this tool.

Download official conversion XLSX

No conversion table loaded yet. The file is read locally and is not uploaded.

The official spreadsheet and your codes are processed entirely in the browser.

Why codes need converting

On 1 January 2025 the KBO switched from NACE-BEL 2008 to NACE-BEL 2025, the Belgian version of the revised European classification NACE Rev. 2.1. Sections were reorganised (computer programming moved from section J to K), new activities got their own codes, and some old codes were split over several new ones. Companies' registered activities were converted by the KBO, but your own files (CRM segments, risk models, grant criteria, statistics) still carry the old codes.

How the helper works

  1. Load the official conversion spreadsheet (XLSX) published by FPS Economy. It is read locally; nothing is uploaded.
  2. Paste old codes, one per line, with or without dots.
  3. Each old code shows every 2025 candidate from the table, with the current 2025 description from the bundled official list.
  4. Export the mapping as CSV.

Sample mapping

Old code (2008)   Candidates (2025)          What to do
62.010            62.100 (section K)        check the listed candidates
one old code      two or more new codes     choose per company
two old codes     the same new code         merged, no choice needed
unknown code      –                         typo or never existed

The helper never picks one candidate for you when there are several: a one-to-many mapping is a business decision (what does this particular company actually do?), and collapsing it silently would corrupt your data.

Edge cases

  • Same digits, different meaning. A 2008 code can look like a 2025 code and mean something else. Never reuse old codes as if they were new ones.
  • Level of detail. The table works at the most detailed level. Map 5-digit or 7-digit codes rather than divisions where you can.
  • Unknown codes (typos, codes that never existed) are reported as not found.
  • Company records. For a specific company, the KBO's own converted codes take precedence over a generic mapping.

Look up any 2025 code with the NACE-BEL 2025 lookup, decode legal forms with the KBO code lookup, and see sector trends on the new codes in Sector Pulse.

Frequently asked questions

How do I convert a NACE-BEL 2008 code to 2025?

Load the official FPS Economy conversion spreadsheet, paste your old codes and read every 2025 candidate per code. Export the result as CSV.

Why does one old code give several new codes?

Some 2008 activities were split in NACE-BEL 2025. Which new code applies depends on what the company actually does, so all candidates are shown.

Did the KBO convert companies automatically?

Yes, the KBO converted registered activities when NACE-BEL 2025 took effect on 1 January 2025. This helper is for codes in your own files and systems.

Is the conversion table included?

You load the official XLSX from FPS Economy; it is read in your browser. The 2025 descriptions shown next to the codes are bundled with the site.

Is my data uploaded?

No. The spreadsheet and your codes are processed in your browser.