The social security laws applicable to employed persons stipulate that a distinction must be made between employed and self-employed persons. As an office which implements legislation, the compensation office must put self-employed persons in one of the two categories, i.e. determine their status under social security law.

Persons deemed to be self-employed must

• work under their own name and on their own account
• be in an independent position and bear their own financial risk

Whether a person is self-employed within the meaning of OASI legislation is checked according to the individual circumstances and in terms of the remuneration for the work in question. The decisive factors in this respect are the economic conditions and not the contractual ones.

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More details

Self-employed persons pay OASI, DI and EO contributions. As self-employed persons are not insured against unemployment, the corresponding ALV contributions are not due in this instance.

How much are the contributions?

The online calculator will give you that information

More details:

Leaflet 2.02 - Self-employed contributions to Old Age and Survivors' Insurance (OASI), Disability Insurance (DI) and Income Compensation Insurance (IC)

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Basis for calculating the pension

The compensation offices manage an individual account (IK) for every person liable to pay contributions. After the end of the contribution year, the annual income of the individual employees is recorded there. The personal account serves as a basis for calculating the pension later on.

Extract of the individual account

The AHV number (OASI number), which you require for making the application, is listed on your OASI certificate as well as on your health insurance card.

Ordering an extract of the individual account

The account statement will be sent to your postal address after about three weeks. It is not possible to send it by email for security reasons.


Explanatory video «Individual account statement »

The insurance certificate makes administrative dealings with the compensation offices or implementing bodies easier.

In case of a change in job, the certificate must be submitted to the new employer so that he or she can register with the relevant compensation office. However, the certificate must no longer be submitted to the office by the employer. It is sufficient to transmit the data (preferably online via our portal connect).

Where do I order a new OASI certificate?

Self-employed persons who have changed their name (e.g. due to marriage or divorce) or have lost their OASI certificate can order a new certificate directly from his or her compensation office.

Correction of errors

Errors (such as incorrect spelling of the name, wrong date of birth or gender) can only be corrected by staff of the competent federal data register. Request correction of your personal details by using the form below and send it to the Residents' Registration Office for your place of residence:

Application for correction of personal details in an official federal data register (form in German).

Send us your change of address notification.

Please note: Employees send their change of address only to the employer.

Joining our OASI and Family Allowances Office, which operates all over Switzerland, is only possible for members of our founding association, Arbeitgeberverband Region Basel (Basel Employer's association), or one of its sections.

For your registration request, please use the following forms depending on your personal situation (in German):

You will be Self-employed for the first time:

Questionnaire to determine the status under social security legislation of employed persons (form in German)
Additional questionnaire for partners in general partnerships

You already have activities as a Self-employed person:

Application form for self-employed people, general partnerships and legal persons

Contact details

We would be happy to answer any questions you may have about membership of our office. Give us a call (+41 61 285 22 22) or book an online appointment via our homepage. We look forward to hearing from you.

More information on this topic:

More information about our compensation office is available here.