Certificate of Sponsorship support helps licensed UK employers prepare accurate sponsorship information before assigning a CoS through the Sponsor Management System.
A Certificate of Sponsorship is an electronic record—not a paper certificate—containing information about the employer, sponsored worker and proposed employment. It does not grant immigration permission or guarantee that the worker’s visa application will succeed.
James Immigration Solutions Ltd supports employers with CoS preparation, eligibility checks, Sponsor Management System information and compliance considerations before assignment.
A licensed sponsor must normally assign a valid Certificate of Sponsorship before a worker can apply under a sponsored work route.
The CoS contains important information, including:
The employer is responsible for ensuring the information entered on the CoS is complete, accurate and consistent with the genuine employment arrangements.
The official Home Office sponsor guidance requires sponsors to check the role, salary, worker’s eligibility and applicable route requirements before assigning a CoS.
Selecting the correct type of CoS is essential.
| Worker’s circumstances | CoS normally required |
|---|---|
| Skilled Worker applying for entry clearance from outside the UK | Defined CoS |
| Skilled Worker applying from within the UK for permission to stay | Undefined CoS |
| Worker applying under another Worker or Temporary Worker route | Undefined CoS |
Undefined Certificates of Sponsorship are generally assigned from the sponsor’s annual allocation. A sponsor must apply separately for a Defined CoS whenever one is required.
Using an Undefined CoS where a Defined CoS is required, or assigning a Defined CoS for a different role from the one approved, can lead to serious compliance action against the sponsor licence.
JISL can assist with the following stages.
We establish:
We review the proposed job title, duties and responsibilities against the relevant occupation code.
The job description should accurately reflect the work the employee will perform. An occupation code should not be selected simply because it offers a more favourable salary threshold.
We consider:
Salary requirements vary according to the immigration route, occupation code and the worker’s individual circumstances.
We prepare or review the information required for the CoS, including:
Where required, we can help the employer prepare:
Approval and processing times remain subject to Home Office assessment.
Before the CoS is assigned, we check whether the proposed information is consistent with:
The final decision to sponsor a worker remains with the employer. Required SMS actions must be taken or approved through the sponsor’s properly authorised SMS user.
Depending on the case, the employer may need to provide:
The exact evidence depends on the immigration route, role and worker’s circumstances.
Once assigned, the employer should give the worker the CoS reference number and relevant sponsorship details.
For a Skilled Worker application:
These requirements are confirmed in the current Skilled Worker sponsor guidance.
An assigned CoS cannot be freely edited. A sponsor note may be used for certain permitted amendments, clarification or minor corrections.
Material changes—such as an incorrect occupation code, substantially different job description or an impermissible change to the terms approved for a Defined CoS—may require cancellation or assignment of a new CoS.
Employers should obtain advice before adding a sponsor note or withdrawing an assigned CoS. The Home Office also provides a technical SMS guide for creating and assigning a CoS.
Common problems include:
These errors can result in additional Home Office enquiries, delays, visa refusal, cancellation of the CoS or compliance action against the sponsor licence.
The sponsor must pay the applicable CoS assignment fee. An Immigration Skills Charge may also apply when sponsoring a Skilled Worker or Senior or Specialist Worker.
Employers should check the current UK visa and sponsorship fees and Immigration Skills Charge guidance before assignment.
Sponsors must not recover prohibited sponsorship fees or associated administrative costs from sponsored workers.
No. A Certificate of Sponsorship supports the worker’s immigration application, but it does not guarantee approval.
The worker must independently satisfy all applicable requirements, which may include:
Our separate Sponsored Worker Applications service supports workers and employers with the visa application stage.
James Immigration Solutions Ltd provides regulated immigration support to UK businesses requiring practical assistance with sponsorship and compliance.
Our support is designed to help employers:
Contact James Immigration Solutions Ltd before assigning a CoS if you require assistance with the correct CoS type, occupation code, salary assessment, SMS information or supporting evidence.
Email: admin@jisl.co.uk
Website: www.jisl.co.uk
James Immigration Solutions Ltd is regulated by the Immigration Advice Authority at Level 1.
IAA organisation reference: F202538614
Company number: 15056317
This page provides general information and does not guarantee the approval of a Certificate of Sponsorship request or immigration application. Immigration Rules and sponsor guidance may change. Advice is provided according to the circumstances of each instructed matter.
Last reviewed: 3 August 2026.
JISL
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