What is the German social security number?
The German social security number is the twelve-character identifier, valid for life, under which Deutsche Rentenversicherung maintains a person's entire insurance record. Its official name is Versicherungsnummer der Rentenversicherung (pension insurance number); everyday German instead uses SV-Nummer or Rentenversicherungsnummer – "SV" simply stands for Sozialversicherung (social security). Sozialversicherungsnummer, SV-Nummer and Rentenversicherungsnummer all refer to the same number; Deutsche Rentenversicherung itself just calls it the Versicherungsnummer.
Don't confuse the German social security number with the Krankenversicherungsnummer (KVNR), a separate number the statutory health insurer issues to identify its own members. Anyone employed in Germany subject to social security contributions is assigned their own social security number at the latest when starting their first job; the sections below show its structure and what it looks like.
What does a German social security number look like?
The German social security number – officially the pension insurance number (Versicherungsnummer der Rentenversicherung) – consists of twelve characters in a fixed structure. A practical example: 50220479M123. It is assigned at the latest when a person starts their first job subject to social security contributions in Germany (since 2005 sometimes already at birth) and stays the same for life.
Important for anyone hiring internationally: the number is not something an employee "brings along" — employers retrieve or newly request it electronically through the data center of the German pension insurance (DSRV) as needed. This also applies to foreign employees starting their first job in Germany.
Structure of the social security number in detail
According to AOK (a statutory health insurer), the twelve digits break down into four segments:
| Digit(s) | Meaning | Example (50220479M123) |
|---|---|---|
| 1–2 | Encoded code of the pension insurance carrier that issued the number | 50 |
| 3–8 | Date of birth, unencoded: day, month, year (DDMMYY) | 220479 |
| 9 | First letter of the birth surname | M |
| 10–11 | Two-digit serial number — assigned gender-neutrally since 1 January 2026 | 12 |
| 12 | Check digit against transcription errors | 3 |
Until the end of 2025, the serial number (digits 10–11) was assigned 00–49 for men and 50–99 for women / "unspecified"/"diverse". Since 1 January 2026, assignment is gender-neutral.
Social security number or insurance number certificate?
The terms are often used interchangeably but refer to different things: the social security number (also pension insurance number, SV-Nummer, or Versicherungsnummer der Rentenversicherung) is the twelve-digit identifier itself. The insurance number certificate (Versicherungsnummernachweis) is the document showing it. Since 1 January 2023, it has replaced the former social security card (Sozialversicherungsausweis). Both contain the insurance number, first name(s), family name, birth name and date of issue — old social security cards remain valid.
Since the 2023 reform, there is also no longer a general obligation to present the certificate to the employer: employers must retrieve the number electronically from the data center of the German pension insurance (DSRV). Only if this automated retrieval does not return a unique number does the employee need to present the certificate — or a new number is requested via the reporting procedure.
Where do I find my SV number?
There are three places to look for the SV number:
- Insurance number certificate (Versicherungsnummernachweis; called Sozialversicherungsausweis until 2023) – the main document Deutsche Rentenversicherung issues when someone starts their first job in Germany, showing the number right next to the first and last name.
- Payslip – in the header, under the field labelled "SV-Nr.". According to Ihre Vorsorge, an initiative of Deutsche Rentenversicherung, even an older payslip works, since the number stays the same for life.
- Pension information letter (Renteninformation) – Deutsche Rentenversicherung's annual letter shows the number top left under "Versicherungsnummer".
If none of these documents is at hand, the employer retrieves the number electronically via the data center of the German pension insurance (DSRV) or applies for a new one if needed.
Relevance for the A1 certificate and postings
For companies handling postings, business trips and workations, the social security number is more than a form detail. It is the identifier under which the pension insurance carrier maintains a person's entire insurance record — including every period covered by an A1 certificate procedure or a reported posting.
Two scenarios come up especially often in practice:
- First employment of foreign staff in Germany: New hires from abroad usually don't yet have a German social security number. The employer triggers its assignment automatically through the reporting procedure when registering the employee for social security — no separate application by the employee is required.
- Posting abroad: If a person stays within the German social security system during a posting, the A1 certificate is requested and administered under their existing insurance number with the responsible carrier. If the number is missing or cannot be uniquely matched, this can delay the A1 process.
Anyone automating HR processes for international teams should therefore make sure the insurance number and personal data (especially birth name and date of birth) are correct and consistent in the HR system before triggering A1 or posting notifications.
FAQ
What is the SV number?
SV-Nummer is German shorthand for Sozialversicherungsnummer — the twelve-character, lifelong pension insurance number every employee subject to social security contributions in Germany is assigned.
How long is the German social security number?
It is twelve characters long: eleven digits and one letter.
What does SV-Nummer mean?
"SV" stands for Sozialversicherung (social security). SV-Nummer is the everyday German short form for Sozialversicherungsnummer, i.e. the pension insurance number.
What is "SV Nr."?
"SV Nr." or "SV-Nr." is the field label used for the social security number, for example on a payslip. Don't confuse it with the Krankenversicherungsnummer (KVNR), a separate number the statutory health insurer issues to identify its own members.
What does SV-Nummer mean on a payslip?
On a payslip, "SV-Nr." shows the same twelve-character social security number that also appears on the insurance number certificate and the pension information letter.
What does a German social security number look like?
It has twelve characters, for example 50220479M123: two digits for the pension insurance carrier, six digits for the date of birth, one letter (first letter of the birth surname), two digits serial number and one check digit.
How many digits does the social security number have?
Twelve characters — eleven digits and one letter.
What is the abbreviation for social security number?
Common abbreviations are SV-Nummer or RV-Nummer (pension insurance number); the official term is Versicherungsnummer.
Who issues the social security card / insurance number certificate?
The German pension insurance (Deutsche Rentenversicherung) issues the insurance number certificate, which has replaced the former social security card since 1 January 2023.
Is the insurance number the same as the social security number?
Yes — Versicherungsnummer, Rentenversicherungsnummer, SV-Nummer and Sozialversicherungsnummer all refer to the same twelve-digit identifier in the German reporting procedure. Germany has no single number valid across all social insurance branches for data-protection reasons; other countries such as Austria, Switzerland or the US use different formats.
The information provided on this website does not constitute legal advice and is not intended to address any legal issues or problems that may arise in individual cases. The information on this website is of a general nature and is provided for informational purposes only. If you need legal advice for your individual situation, you should seek the advice of a qualified attorney.