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A Certificate of Sponsorship (CoS) is an electronic record , not a physical document , generated by a licensed UK employer through the Home Office Sponsor Management System (SMS). It is a mandatory prerequisite that allows an overseas worker to apply for a UK Skilled Worker visa or other sponsored work routes. The CoS contains the worker's job title, SOC 2020 occupation code, start date, salary, and work location, which the Home Office uses to assess visa eligibility.
Everything your organisation must have in place before assigning a CoS
What your sponsored worker needs to apply for their UK Skilled Worker visa using the CoS reference number
Download a simple reference PDF with all 18 document and compliance items, useful for briefing your HR team, employment counsel, or the worker themselves. For nationality-specific requirements, TB test obligations, ISC calculations, and end-to-end CoS submission support, talk to the Jobbatical team.
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SOC code review · ISC calculation · Rejection prevention
The CoS process is deceptively administrative, but errors in SOC code selection, salary compliance, or payroll period reporting (new from April 2026) can trigger UKVI investigations that put your entire sponsor licence at risk. Jobbatical handles the end-to-end CoS workflow so your team doesn't have to carry the compliance exposure alone.
These are the most common reasons UKVI refuses or returns CoS requests and visa applications , and what your HR team must verify before submission.
| Rejection risk | Risk level | What goes wrong | Prevention |
|---|---|---|---|
| Incorrect SOC 2020 code | Critical | Job duties don't match the chosen SOC code; or code is below RQF Level 6 (now required from July 2025) | Use CASCOT and Appendix Skilled Occupations to match duties, not job title. Document your selection rationale |
| Salary below going rate or failing per-period payroll rule | Critical | Salary meets annual threshold but dips below minimum in a 3-month payroll period (new April 2026 rule) | Verify salary against both the annual going rate AND each individual 3-month payroll period before assignment |
| Name mismatch between CoS and passport | Critical | Abbreviated name (e.g. "Rob" vs "Robert"), name order differences, or typos in personal data | Copy passport details character-by-character. Verify with the worker before SMS submission |
| Speculative Defined CoS request | High | Applying for a Defined CoS before a specific worker is identified , now explicitly rejected under March 2026 guidance | Submit a Defined CoS request only after a specific worker is selected and all their details confirmed |
| B1 English certificate submitted instead of B2 | High | Worker submits a pre-April 2026 B1 test certificate; requirement has increased to B2 CEFR | Verify the worker's English test result meets B2 (not B1); confirm the provider is on the UKVI approved list |
| ISC charged to the worker | High | Immigration Skills Charge deducted from salary or invoiced to the employee , a compliance breach that risks licence revocation | Pay ISC from the employer's account. Keep payment confirmation as Appendix D evidence |
| Appendix D record gaps | Medium | Missing payslips, unsigned contracts, or no record of staff handbook acknowledgements , a key focus of 2026 compliance visits | Maintain rolling records per the updated March 2026 Home Office guidance; audit every 6–12 months |
| Missing TB test certificate | Medium | Worker from a TB-listed country submits application without a valid certificate from an approved clinic | Check GOV.UK list of TB-required nationalities early; allow 2–4 weeks for the test and certificate |
| Not sure if your CoS is compliant? Book a compliance review with Jobbatical → | |||
The March and April 2026 Home Office guidance changes have raised the compliance bar for every UK sponsor. Jobbatical's CoS service is built to absorb that risk:
Use these alongside the CoS checklist , the CoS is one step in a broader UK immigration process for each hire.
Disclaimer: This checklist is for general guidance only and does not constitute legal or immigration advice; requirements may change without notice. UK Certificate of Sponsorship rules, salary thresholds, SOC code eligibility, payroll compliance requirements, and sponsor duties are updated regularly by the Home Office , verify against current official guidance (GOV.UK Sponsor a Skilled Worker guidance, Appendix Skilled Occupations, and Appendix D) before assigning any Certificate of Sponsorship. Jobbatical accepts no liability for visa refusals, sponsor licence downgrades, suspension or revocation, delays, or complications arising from reliance on this checklist. For a complete, case-specific CoS and compliance review, consult the Jobbatical immigration team.
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🇮🇳 India | Additional requirements and notes beyond the standard checklist:
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🇵🇰 Pakistan | Additional requirements and notes beyond the standard checklist:
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🇳🇬 Nigeria | Additional requirements and notes beyond the standard checklist:
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🇵🇭 Philippines | Additional requirements and notes beyond the standard checklist:
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🇨🇳 China | Additional requirements and notes beyond the standard checklist:
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🇿🇦 South Africa | Additional requirements and notes beyond the standard checklist:
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🇧🇩 Bangladesh | Additional requirements and notes beyond the standard checklist:
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🇺🇸 United States | Additional requirements and notes beyond the standard checklist:
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| Not sure what your employee's specific VAC, TB requirement, or nationality exemption status is? Email us at [email protected] or book a call | |
Need support beyond this calculator? Our experts handle the full process, from eligibility checks to application and compliance.
Explore UK Certificate of Sponsorship (CoS)A: Before assigning a CoS, employers should collect the worker's passport details, contact information, right-to-work evidence (where applicable), employment contract, job description, salary confirmation, and any qualification documents required for the role. These records help demonstrate that the sponsorship meets UKVI requirements and should be retained in the sponsor's compliance files.
A: Employers should retain the signed employment contract, job description, CoS assignment details, salary records, recruitment documentation where applicable, and any evidence used to determine the correct SOC 2020 occupation code. These documents may be requested during a UKVI compliance audit or sponsor licence inspection.
A: Not every sponsored role requires qualification evidence, but employers should retain copies of degrees, professional licences, training certificates, or other credentials if these documents were used to assess the worker's suitability for the role. Keeping qualification records helps demonstrate that the worker is appropriately qualified for the sponsored position.
A: Employers should retain salary confirmation letters, payroll records, employment contracts, offer letters, and any documentation demonstrating that the sponsored worker's pay meets the applicable Skilled Worker salary requirements. These records help evidence compliance if UKVI reviews the sponsorship arrangement.
A: Common document-related compliance failures include missing employment contracts, incomplete right-to-work records, inconsistent worker details across documents, insufficient salary evidence, missing qualification records, and incomplete Appendix D files. Maintaining complete and up-to-date sponsorship records is essential for demonstrating compliance during a UKVI audit or site visit.
Complete UK Certificate of Sponsorship checklist for 2026: 18 employer & employee documents, SOC code verification, ISC compliance rules, and rejection causes. Free guide download for HR and Employer teams by Jobbatical.
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