Certificate of Sponsorship UK: Defined vs Undefined CoS, Fees and Steps

This in-depth guide is written for UK employers researching uk certificate of sponsorship guide. It explains the practical process, the key compliance risks and the official resources to check before acting. Immigration law and Home Office guidance change, so treat the linked official sources as the current reference point for the individual case, not as a substitute for case-specific advice.

Quick summary

• Define the genuine job and check the current UK rules before promising sponsorship.
• Use official GOV.UK occupation, salary, sponsor and right-to-work guidance for the actual case.
• Keep the contract, job description, occupation code, sponsorship record and real work consistent.
• Assign an accountable owner, retain evidence and track deadlines and follow-up actions.
• Re-check official guidance immediately before applying because rules, fees and procedures can change.

What a Certificate of Sponsorship means

A Certificate of Sponsorship is an electronic record assigned by a licensed sponsor for use in a worker’s immigration application. It is not a visa and does not itself give permission to work. The employer is responsible for ensuring the job and details are accurate. Follow the current sponsor guidance.

Defined and Undefined CoS

The process differs according to the worker’s application circumstances. Defined CoS requests use a specific process, while Undefined CoS are managed through a sponsor’s allocation for relevant applications. The exact distinction and exceptions should be checked in the current sponsor guidance. Do not choose a type based on convenience or copy a previous case without confirming that the circumstances match.

Complete eligibility checks first

Before requesting or assigning a CoS, confirm the genuine role, occupation code, salary, hours, work location, candidate requirements and sponsor licence. The CoS workflow should not be used to test whether a job might qualify. Complete the assessment and retain the evidence first.

Enter accurate and consistent details

Check the occupation code, job description, salary, weekly hours, work address, dates, duration and candidate details against the approved contract. The details must reflect the intended work, not a generic template. A mismatch may cause delays, refusal or sponsor-compliance questions. Require a second-person check before assignment where practical.

Manage allocations and recruitment forecasts

Forecast upcoming hires and manage CoS allocation in line with current system processes. An allocation problem can delay a planned start, while unplanned or poorly managed requests indicate weak recruitment planning. Keep a quarterly forecast of roles, candidates, expected dates and readiness, and update it when a vacancy or candidate changes.

Fees and prohibited cost recovery

A CoS fee is separate from the sponsor licence fee, visa application fee and Immigration Skills Charge. Check the current amounts in official guidance, including the licence fee page and Immigration Skills Charge page. Some sponsorship costs must be borne by the employer and cannot be recovered from the worker.

Timing and candidate communication

Assign the CoS when the role and candidate checks are complete and the worker is ready to proceed. Explain the next application steps, likely evidence requirements and dependencies without guaranteeing a visa decision date. Coordinate with the candidate so the CoS information, contract and application details remain consistent.

Changes after assignment

If the role, salary, location or employment arrangement changes, check the current sponsor rules to determine whether a report, amended information or a new application is required. Do not assume every change is minor. Record the decision and update internal records promptly.

Common CoS errors

Common errors include the wrong CoS type, a code that does not reflect duties, salary details inconsistent with the contract, vague role descriptions, inaccurate dates and assigning the record before eligibility is confirmed. Use a standard checklist and make one person accountable for final quality control.

CoS checklist

Confirm licence and route; approve the genuine vacancy; select the code; calculate salary; confirm candidate requirements; choose the correct CoS type; check allocation or request the defined record; reconcile details with the contract; confirm fees; assign through an authorised user; and store the decision record.

Practical employer checklist

• Name a process owner and backup.
• Save the official guidance links and the date of the check.
• Keep the role, salary, contract and sponsorship records consistent.
• Track evidence, deadlines, dependencies and decisions in one case record.
• Complete required right-to-work checks before work starts and retain evidence.
• Schedule post-hire reviews and recurring compliance checks.

Frequently asked questions

Is a CoS the same as a visa?

No. It is an electronic sponsorship record used in a visa application.

What is the difference between Defined and Undefined CoS?

They apply to different application circumstances; check the current sponsor guidance.

Does a CoS mean the worker can start?

No. The worker must have the necessary permission and the employer must complete right-to-work checks.

Can the employer recover sponsorship fees?

Some costs cannot be recovered from workers. Check current sponsor guidance before making deductions.

Official resources and next steps

The following primary sources provide the authoritative starting point for UK employer sponsorship and immigration compliance. Follow the route-specific guidance and check the publication date before using a page to make a decision.

• Skilled Worker visa
• Eligible occupations and codes
• Salary requirements
• Sponsor licence application
• Sponsor duties and compliance
• Right to work checks
• Immigration Skills Charge

Important: This guide provides general information for employers, not legal advice and not a guarantee that a specific job or worker qualifies. UK immigration rules, fees, occupation lists and Home Office guidance can change. Verify the current official requirements for the exact case and seek advice from an appropriately qualified UK immigration professional where needed.