The speed of offshore company formation can vary depending on the jurisdiction's regulations, processes, and efficiency. Generally, some of the fastest jurisdictions for offshore company formation include:

Seychelles: Known for its Offshore Company Incorporation Fast process and minimal paperwork requirements.
Hong Kong: Offers fast incorporation timelines, typically within 1-2 weeks.
British Virgin Islands (BVI): Has streamlined processes for company formation, usually completed within 1-2 weeks.
Cayman Islands: Offers efficient incorporation processes, often completed within 1-2 weeks.
Singapore: While not traditionally considered an offshore jurisdiction, Singapore offers a straightforward incorporation process, usually completed within 1-2 weeks.
It's important to note that the exact timeline can vary based on factors such as the type of company, compliance requirements, and the workload of regulatory authorities at the time of application. It's advisable to consult with experts or service providers familiar with these jurisdictions for the most up-to-date information and assistance with offshore company formation.