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Switzerland TIN validator
Check whether a Switzerland AHV / AVS follows the expected structure before you save it, send it to an API, or include it in a tax workflow.
Private by design
Your data stays in your browser
None of the TIN data you enter is ever saved to our servers — validation runs entirely on your device.
Validation Workspace
Validate AHV / AVS
Enterprise checks for Switzerland tax identification numbers.
Instant one-by-one format validation
How Switzerland tax IDs are formatted
In Switzerland, the tax identifier is commonly known as AHV-Nummer (AHV / AVS). The expected format is 13 digits (756.XXXX.XXXX.XX) with checksum. Teams usually need a Switzerland AHV / AVS check around social insurance, tax filing, employment, or before a record moves into billing, onboarding, or compliance review.
Valid examples
756.1234.5678.97756.9876.5432.18
Invalid examples
- 756.1234.5678.90 (Invalid checksum)
- 756.1234.5678 (Incomplete)
What this validator checks
Format and length
Confirms the number follows the expected Switzerland pattern: 13 digits (756.XXXX.XXXX.XX) with checksum.
Checksum logic
Runs the checksum rule used by Switzerland when the public format includes one, helping catch typos that still look correctly formatted.
Useful examples
Shows valid and invalid-looking samples so you can compare spacing, separators, letters, and digit counts before submitting real data.
When people usually check this number
- Social insurance
- Tax filing
- Employment
- Pensions
A format match does not prove that a Switzerland tax ID belongs to a specific person or business. Use the result as a first-pass data quality check, then confirm sensitive cases with official records.
Official source: Federal Tax Administration
Last reviewed: May 23, 2026. We update country guidance when public format rules change.
How to check a Switzerland AHV / AVS
Use this check before a record reaches billing, tax reporting, or manual review.
Enter the AHV / AVS
Paste or type the Switzerland tax identifier exactly as it appears in your source record. Spaces and separators are fine when they are part of the expected format.
Review the format result
Check whether the number matches the known Switzerland structure, including length, separators, letters, and checksum rules where public guidance includes them.
Confirm important records
For onboarding, tax reporting, or compliance work, treat the result as a data-quality signal and confirm high-risk records with Federal Tax Administration or your internal process.
Frequently asked questions
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