Certificate of Sponsorship (CoS): A Comprehensive and Detailed Guide for UK Employers

To lawfully sponsor skilled overseas workers in the UK, employers must assign a Certificate of Sponsorship (CoS) to each prospective employee before they submit a visa application. The CoS acts as an electronic record containing key details about the worker and the role being offered. This guide explains the different types of CoS, the application process, and best practices to help ensure smooth sponsorship and compliance with UK Visas and Immigration (UKVI) requirements.

What is a Certificate of Sponsorship (CoS)?

A Certificate of Sponsorship (CoS) is an electronic document assigned by a licensed sponsor to an overseas worker, confirming that the worker is eligible for a specific role in the UK. It includes essential details such as the job title, salary, and proposed start date of employment. Without a valid CoS, the worker cannot apply for a Skilled Worker visa or other sponsored visa categories.

Each CoS is issued with a unique reference number, which the worker must use when applying for their visa. While the CoS is a mandatory requirement, it does not in itself guarantee that a visa will be granted.

Types of Certificates of Sponsorship (CoS)

Employers may assign two types of Certificate of Sponsorship (CoS), depending on the worker’s location and the relevant visa category:

• Undefined Certificate of Sponsorship (Undefined CoS)
• Defined Certificate of Sponsorship (Defined CoS)

1. Undefined Certificate of Sponsorship (Undefined CoS)

An Undefined CoS is intended for workers who:

• Are already in the UK and applying for a visa under the Skilled Worker route.
• Are applying under other visa routes, such as the Intra-Company Transfer or Minister of Religion routes.

How to Apply for an Undefined CoS

• Evidence of Business Needs: Provide details such as future recruitment plans.
• Supporting Documentation: Submit employment contracts, job descriptions, or hiring records.

Annual Allocation and Renewal

• Expiry Date: Unused Undefined CoS expire on 5 April each year.
• Renewal Process: Submit renewal requests before the deadline to avoid delays.
• Late Requests: Additional Undefined CoS can be requested during the year if needed.

2. Defined Certificate of Sponsorship (Defined CoS)

A Defined Certificate of Sponsorship (CoS) is required for workers applying for a Skilled Worker visa from outside the UK. Employers must request a Defined CoS through the Sponsorship Management System (SMS).

Application Process for Defined CoS

• Submit a Request: Apply through the SMS portal.
• Processing Time: Usually processed within 2-8 weeks.
• Assign Promptly: Assign within 3 months to avoid expiration.

Best Practices for Managing Certificates of Sponsorship

• Plan and Forecast: Estimate CoS needs accurately.
• Timely Renewals: Submit requests before 5 April.
• Accurate Records: Keep detailed records of CoS usage.
• Compliance: Ensure HR systems follow UKVI rules.

Ensure your business is ready to sponsor skilled overseas workers. Contact us today for expert guidance on managing Certificates of Sponsorship.