Certificate of Sponshorship (CoS)
Certificate of Sponsorship (CoS) Guide for UK Employers
A Certificate of Sponsorship (CoS) is essential for UK-based employers who wish to legally hire skilled overseas professionals. This detailed guide will help you understand the types of CoS, how to apply for them, and best practices to manage your allocations. Learn the difference between Defined and Undefined CoS, application procedures, and renewal timelines. Staying compliant with UK Visas and Immigration (UKVI) regulations is crucial to avoid delays and penalties. Proper planning and accurate documentation are key. With the right guidance, the CoS process can be efficient and stress-free.
Certificate of Sponsorship (CoS): A Comprehensive and Detailed Guide for UK Employers
Before a skilled overseas worker can apply for a UK visa, employers must assign them a Certificate of Sponsorship (CoS). This is an electronic document that includes key information about the role being offered and the applicant. It is a critical step in the visa process and must be completed by an employer with a valid Sponsor Licence.
Each CoS comes with a unique reference number, which the overseas worker must include in their visa application. While it doesn’t guarantee visa approval, it is a mandatory requirement for submitting the application.
Types of Certificates of Sponsorship (CoS)
There are two types of CoS, depending on where the applicant is located and the visa type:
Undefined Certificate of Sponsorship (Undefined CoS)
Defined Certificate of Sponsorship (Defined CoS)
1. Undefined Certificate of Sponsorship (Undefined CoS)
An Undefined CoS is used for workers who:
Are already in the UK and switching to the Skilled Worker route.
Are applying through other visa routes such as the Intra-Company Transfer or Religious Worker route.
How to Apply for an Undefined CoS:
Business Justification: Provide information on your staffing needs and recruitment plans.
Supporting Documents: Include job descriptions, employment contracts, and related documents.
Annual Allocation & Renewal:
Expiry: Unused Undefined CoS expire on 5 April each year.
Renewal: Renewal requests should be submitted before this date.
Additional Requests: Extra CoS can be requested during the year if needed.
2. Defined Certificate of Sponsorship (Defined CoS)
A Defined CoS is issued to overseas workers who are applying for a Skilled Worker visa from outside the UK. Employers must request this through the Sponsor Management System (SMS).
Application Process:
Submit a Request: Through the online SMS portal.
Processing Time: Generally processed within 1-2 working days.
Validity: Once granted, the CoS must be assigned within 3 months to remain valid.
Best Practices for Managing Certificates of Sponsorship
Forecasting: Accurately estimate your CoS needs for the year.
Renewals: Always apply for renewals ahead of time.
Record-Keeping: Maintain detailed records of all CoS issued.
Compliance: Make sure your internal HR systems meet UKVI requirements.
Need Help?
At UK Immigration Consultant, we assist employers through every step of the sponsorship process — from initial applications to ongoing compliance. Whether you’re applying for your first CoS or managing renewals, our team is here to ensure your sponsorship journey runs smoothly.
