When will my onboard credit be applied to my account? October 31, 2018 21:21 Updated Your onboard spending will be applied to your cruise account within 24 hours of boarding your cruise. Related articles What is my "up to $750 Onboard Credit" amount? How do I access my Cruises Only reservation? Can I bring alcohol or other beverages onboard? Should I purchase a beverage package from the cruise line? What information is required when pre-registering with the cruise line?