If you are getting married after AOR date then CRS points are not recalculated. On the other hand if you were married before AOR and adding spouse after AOR then it's misrepresentation and they can reject the application.
Adding your spouse will impact the processing of your application as your spouse needs to complete medical and security even if he/she is not accompanying. You can inform IRCC about the marital status and they will share the application forms and the required document list. But for faster processing you can get all the docs ready in advance and once you have the marriage certificate in hand submit everything right away.
These are the docs requested from me, make sure that you fill in the latest version of the form.
- A new Generic Application Form for Canada (IMM 0008) with supporting documents,
- (If applicable) A Schedule A - Background/Declaration (IMM 5669) form,
- (If applicable) An Additional Dependants/Declaration (IMM 0008DEP) form,
- (If applicable) A signed Additional Family Information (IMM 5406) form,
- A copy of the birth certificate, marriage certificate or proof of common-law relationship,
- A copy of the family member's valid passport,
- Police certificates for all countries where the family member over the age of 18 has lived for more than 6 months since turning 18,
- A letter of explanation, and
- If applicable, the proof of payment.
Upfront medical was not requested by them, but you can still do an upfront and in most cases they approve it. Doing medical upfront will save 4-6 weeks time.
Expect delays anywhere from 2 months to 1 year on the application.