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1. Log into your Substack account and export a CSV list of all your subscribers.

    

    

    

   
   Note:

   If you’d like to retain certain advanced data fields about your subscribers to create unique segmentation in beehiiv, see the instructions below for Optional: Structuring Advanced Data Fields prior to moving to the next step. 

    

2. Log into your beehiiv account so you can import your Substack subscribers. From the left hand panel, go to Settings > Publication > then click on the Import Subscribers tab.  
    

3. If you're importing more than 10 subscribers into beehiiv, you'll first need to complete Stripe Identity Verification to verify your identity. You can do so by going to Settings > Publications > Import Subscribers , and then click on the Start Stripe Identity Verification button. Then, after you have completed the Stripe verification process, click on the Start New Import button.

   If you’d like to import more than 10,000 subscribers, you’ll need to complete the Stripe verification process as outlined above, then fill out a form to submit. You can access the form by going to Settings > Publication > Import Subscribers , then scroll down to Raise your import limit and click on Complete this form .  
   
    

    

    

   

   
   
    

4. After clicking on the black Start Import button, you’ll be prompted to choose an import method. Select Upload a CSV file and then choose the CSV file that you want to import.  
   
    

    

    

   

   
   
   If you have a welcome email setup or an automation active in your beehiiv account, you can choose those options or leave them blank. You can also select or skip the email validation.  
    

5. Review your selections and click on Import Subscribers .  
    

6. A confirmation message will pop up where you will need to confirm that the contacts in the list have knowingly opted-in to receiving emails from you. Click on

   Import to confirm.  
   
    

    

    

   

   
    

7. Next, you’ll be able to start mapping out the fields from the CSV file as custom fields within beehiiv.  
   
    

    

    

    

   

   
    

8. When done making your mapping selections, click on the Import button.  
    

9. Once completed, you will see how many subscribers were accepted  
   
    

    

    

   

   
    

10. You can then view the subscribers by navigating to the Audience section of your account.  
    
     

     

     

    

    
     

11. To see the newly imported custom fields, click on an individual subscriber’s name and navigate to the Custom Fields section.