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Germany Tax ID for Payroll: What New Workers Need and What It Does Not Prove
The German tax identification number, or steuerliche Identifikationsnummer, is an 11-digit personal number used by the tax administration.
It is commonly called:
- Steuer-ID;
- IdNr;
- tax ID.
It is assigned automatically after a person's first registration in Germany.
The tax ID helps the employer retrieve electronic wage-tax characteristics.
It is not:
- a work permit;
- a residence permit;
- a social-insurance number;
- a tax-office case number;
- a VAT number;
- proof that employment is authorised.
An employer must verify immigration work rights separately.
Automatic assignment after Anmeldung
The local registration authority transmits the first registration information to the Federal Central Tax Office, BZSt.
BZSt then assigns the tax ID if the person does not already have one.
The letter is sent to the registered address.
The number:
- remains valid for life;
- does not change after moving;
- does not change after marriage;
- is not reissued as a new number when returning to Germany.
A person who lived in Germany before may already have an IdNr.
Do not apply for a second number.
Where to find it
The tax ID can appear on:
- BZSt letter;
- wage-tax certificate;
- income-tax assessment;
- employer payroll records;
- tax correspondence.
It is not printed on every residence or registration document.
Ask the previous employer or tax adviser if the original letter is lost, but use secure communication.
Do not send the tax ID through unencrypted public messages.
If the letter does not arrive
BZSt states that the person can request the number again if no letter has arrived within three months after first registration.
The request is made through the BZSt online service.
The BZSt sends the number to the registered address.
It is not communicated by ordinary telephone or email.
Before requesting it again, check:
- Anmeldung was completed;
- surname on mailbox;
- registered address;
- recent move;
- duplicate historical IdNr;
- municipality transmitted correct data.
A missing name on the mailbox is a common delivery problem.
Payroll before the tax ID arrives
Tell payroll that the IdNr is pending.
Provide:
- legal name;
- date of birth;
- address;
- Anmeldung date;
- health-insurance fund;
- social-insurance data;
- IBAN;
- residence and work permission.
The employer may have a temporary wage-tax handling route under the applicable ELStAM rules.
Withholding can be less favourable until the tax ID and electronic characteristics are available.
The employee can later correct over-withholding through payroll or the annual tax return.
Do not delay employment solely because the postal letter is pending if all work-right conditions are met.
ELStAM
Employers retrieve electronic wage-tax deduction characteristics, ELStAM, using the employee's:
- tax ID;
- date of birth;
- employment relationship data.
ELStAM can include:
- tax class;
- child allowances;
- church-tax status;
- allowances or additional amounts;
- main or secondary employer status.
The tax ID itself does not reveal these details.
If the ELStAM data is wrong, contact the competent tax office.
Do not ask BZSt to change the tax class. BZSt manages the ID, while the tax office handles tax characteristics.
Tax ID versus Steuernummer
A Steuernummer is issued by a tax office for a tax case.
It can change after:
- move;
- new tax office;
- business change;
- tax procedure.
A self-employed person can need a Steuernummer in addition to the lifetime tax ID.
Payroll employees generally give the employer the IdNr, not the Steuernummer.
Tax ID versus social-insurance number
The social-insurance number, or Versicherungsnummer, is used for pension and social-security reporting.
It is different from the tax ID.
The employer can need both.
The health insurer or pension system can arrange the social-insurance number where the employee does not have one.
Do not enter the tax ID in the social-insurance field.
Tax ID versus VAT ID
The Umsatzsteuer-Identifikationsnummer, or USt-IdNr, is a business number for specified EU VAT transactions.
It is not the employee's personal tax ID.
An ordinary employee should not give a company's VAT number to payroll as personal identification.
Work permit evidence
The employer must inspect the residence title.
Relevant evidence includes:
- national D visa;
- electronic residence card;
- supplementary sheet;
- Fiktionsbescheinigung;
- work-permission wording.
Section 4a of the Residence Act governs access to employment.
The tax ID does not legalise employment.
A person can have a tax ID and no current right to work.
A person can also have a valid work visa before the tax ID letter arrives.
Employer file
The employer should retain only the personal data required under tax, social-security, immigration and employment law.
The employee may provide:
- tax ID;
- date of birth;
- address;
- bank;
- insurer;
- work-right document.
Do not ask for the entire BZSt letter if recording the number is sufficient under company policy.
Protect the tax ID from identity misuse.
Address changes
The tax ID stays the same.
Complete Ummeldung at the registration office.
The updated address flows through public systems, but the employee should also notify:
- employer;
- tax office where relevant;
- bank;
- insurer;
- pension authority;
- foreigners authority.
Do not request a new tax ID after every move.
Returning to Germany
A former resident should search old:
- payslips;
- tax assessments;
- wage-tax statements;
- BZSt letters.
If the IdNr cannot be found, request renewed communication through BZSt after the German address is registered.
Using an old valid tax ID is correct.
Family members
Each person receives their own tax ID, including children registered in Germany.
The child's tax ID can be required for:
- child benefit;
- tax allowances;
- other family procedures.
Do not use the parent's tax ID for a child.
Tax class after marriage
Marriage does not change the tax ID.
It can affect tax class and annual taxation.
Register the marriage correctly and apply for the appropriate tax-class change where needed.
Foreign marriage documents can require verification.
The payroll update occurs through ELStAM.
Do not assume the employer can change tax class manually without the authority data.
Common mistakes
- confusing tax ID and work permission;
- applying for a second IdNr;
- entering the Steuernummer in payroll;
- waiting silently while payroll cut-off passes;
- assuming BZSt will email the number;
- missing surname on mailbox;
- failing to tell payroll that the number is pending;
- ignoring incorrect ELStAM;
- using the company's VAT number;
- requesting a new tax ID after moving.
Sources
- BZSt — Obtain or re-request the tax identification number
- German Residence Act — Section 4a, employment access
- Federal Registration Act — Registration deadline
- BZSt — Tax identification services
This article provides general information. Payroll, tax-office and immigration requirements should be handled as separate compliance processes.