You must apply for an extension of your residence permit at the foreigners authority responsible for your place of residence. The procedure is as follows:

• Depending on the foreigners authority and your request, it may be possible to apply via the Internet. Find out whether your foreigners authority offers electronic application for a residence permit.
• If you can only apply in person, make an appointment with the immigration office.
  During the appointment, your application will be accepted and your supporting documents checked (bring these with you to the appointment). Your fingerprints will be taken for the renewal of the electronic residence permit (eAT card).
• In the case of an electronic application, the Foreigners' Registration Office will contact you after receiving your application to arrange an appointment at the Foreigners' Registration Office. During the appointment, your documents will be checked (bring them with you to the appointment) and your fingerprints will be taken for the renewal of the electronic residence permit (eAT card).
• If your application is approved, the Foreigners' Registration Office will arrange for the eAT card to be issued.
• After about six to eight weeks, you can collect the eAT card from the immigration office.
• The eAT card must always be collected in person.
• Fees are charged for the extension of the residence permit. The time and form of payment vary depending on the authority.

• The extension should be applied for at least eight weeks before the expiry of your valid residence permit.
• In the event of an extension, the new residence permit will be issued again for a limited period of time. The validity depends on the period of validity of your employment contract and the approval of the Federal Employment Agency.

about six to eight weeks