Your residence permit must be valid even if you have applied for citizenship
If you have not been granted or applied for a permanent residence permit when you apply for Norwegian citizenship, you must hold another valid residence permit. Without a valid permit or a registered application for renewal, your citizenship application will be rejected.
If you have already applied for a permanent residence permit, you do not need to renew your current residence permit.
Remember to renew your residence permit while you wait
The waiting time can be long, and you must make sure your temporary residence permit is renewed before the previous one expires