If you have Modify billing & change name on contract permissions, you can pay your account invoice from within HubSpot.
When multiple invoices are past due, you'll see a past due banner at the top of your Account & Billing screen.
To change your contract to automatic credit card terms, please contact your Customer Success Manager. If you don't have your Customer Success Manager's contact information, click Help to contact HubSpot Support.
Learn more about managing your billing details.