As a care provider in the UK, you know how tough it is right now in adult social care. Staffing shortages hit hard every single day. You are doing everything you can to keep residents safe, maintain CQC standards, and deliver the compassionate care your teams are proud of. For so many providers across the UK, the Skilled Worker route and the Health and Care visa have become a lifeline for bringing in dedicated overseas talent to fill care worker and senior care worker roles.
But here is the reality in 2026. The Home Office has made the rules around Certificates of Sponsorship much stricter. The latest official sponsor guidance, version 04/26, came into force on 8 April 2026. It brings tighter checks, clearer rules on genuine jobs, stronger salary monitoring, and extra requirements for care occupations.
One small mistake when you assign or manage a Certificate of Sponsorship can now cause real problems. You could face visa refusals, your sponsor licence being suspended or even taken away, financial penalties, and serious questions from the CQC. That is the last thing any care provider needs when you are already working so hard to keep everything running.
That is why we’ve put this guide together. Drawing straight from the official UK government sponsor guidance so you get the clearest picture possible on how to avoid the common CoS mistakes care providers are making.
What is a Certificate of Sponsorship
A Certificate of Sponsorship, or CoS, is the official electronic document you create and assign as a licensed sponsor. It is your formal confirmation to the Home Office that you are offering a genuine, eligible job to a specific overseas worker. Think of it as the key that unlocks a care worker’s Skilled Worker visa or Health and Care visa application.
You create it inside your sponsorship management system account on GOV.UK. Once assigned, the CoS contains every important detail the worker needs: the exact job title, the full list of duties, weekly hours, salary, the SOC 2020 occupation code, the start date, and the work location. For any care provider in England sponsoring a care worker or senior care worker, you must also include your active CQC registration number and the regulated activities the person will be carrying out.
There are two types you will use:
- A Defined Certificate of Sponsorship: This is for workers who are applying from outside the UK. You have to apply for one first and wait for Home Office approval before you can assign it.
- An Undefined Certificate of Sponsorship: This kind of CoS is for workers already in the UK who need to extend their permission or change employer. You assign these straight from your yearly allocation.
Once you assign the CoS, the worker normally has only three months to use it and submit their visa application. If they miss that window, or try to apply more than three months before the start date shown on the CoS, the application will be refused.
You pay the CoS fee and the Immigration Skills Charge when you assign it. You must never pass any of those costs on to the worker. That rule is strict and breaking it can cost you your sponsor licence.
If you need to log in and manage your CoS right now, you can do that by clicking on this text.
CoS Mistakes and How to Avoid Them
1. Sponsoring workers who do not meet the 2026 rules
Under the updated rules, care workers and senior care workers can no longer be sponsored directly from overseas in the same way as before. There are now stricter conditions around who you can sponsor under these occupation codes.
If the worker does not meet the current requirements, the visa will be refused. Repeated errors in this area can also trigger a wider review of your sponsor licence.
You can read through the updated sponsor guidance for clarity on who can be sponsored by you.
How to know who meets the criteria:
- Check that the worker is already in the UK before proceeding with sponsorship
- Confirm they meet the required criteria under the current rules before assigning a CoS
- Do not rely on previous guidance or past processes, as rules have changed
- Review eligibility carefully for care worker and senior care worker roles
- Seek clarification or support if there is any uncertainty before assigning the CoS
2. Not meeting CQC requirements
Meeting CQC requirements is a core part of your eligibility to sponsor under the Health and Care visa route. You must be carrying out regulated activity and hold an active registration with the Care Quality Commission. When assigning a CoS, you are expected to include accurate details of your registration and the regulated activities the worker will be involved in.
If this is missing, incorrect, or does not align with your service, the Home Office can refuse the application. In more serious cases, it can raise wider concerns about your organisation operating within the required standards which can trigger sponsor license action.
How to avoid it:
- Ensure your CQC registration is active and up to date before assigning any CoS
- Be undertaking at least one regulated activity as defined in Schedule 1 to the Health and Social Care Act 2008
- Only sponsor roles that fall within your registered regulated activities
- Include your correct CQC registration details on every CoS
- State the exact regulated activities the worker will perform when you assign the CoS.
- State the working location(s) clearly on the CoS.
3. Salary and payment errors
Salary mistakes are one of the most common reasons CoS applications are refused, and in 2026 the checks are much tighter. When you assign a CoS, the salary you state must meet both the general threshold and the going rate for the role. More importantly, it must reflect what the worker will actually be paid in practice.
Only guaranteed gross pay counts. You cannot rely on overtime, bonuses, accommodation, or other allowances to meet the requirement. The Home Office is now cross checking salary details with HMRC records. If they find that a worker is being paid less than stated, or that deductions reduce their pay below the threshold, this can lead to serious compliance action.
Rreview the official salary requirements here
How to avoid salary and payment errors:
- Ensure the salary meets both the general threshold and the going rate before assigning the CoS
- Only include guaranteed basic pay, not variable or conditional payments
- Align payroll exactly with what is stated on the CoS
- Regularly audit payslips against CoS records to ensure consistency
- Avoid making deductions that could bring pay below the required level
4. Using the wrong type of CoS
It sounds simple, but this is a mistake that still catches many providers out, especially when recruitment is moving quickly.
There are two types of Certificate of Sponsorship, and they are not interchangeable. A Defined CoS must be used for workers applying from outside the UK, while an Undefined CoS is for workers already in the UK who are switching roles or extending their stay.
For care workers and senior care workers (SOC 6135 and 6136), Defined CoS are no longer available for new overseas applicants after 22 July 2025. Assigning the wrong type makes the CoS invalid and the application will be refused.
How to avoid using the wrong CoS type:
- Confirm where the worker is applying from before assigning the CoS
- Use a Defined CoS for any applicant outside the UK
- Use an Undefined CoS only for workers already in the UK
- Check your CoS allocation and request additional Defined CoS where needed
- Train anyone with SMS access to understand the difference before assigning
- Always refer to sections SK11, SK12 and SK13 of the sponsor guidance for clarity
5. Assigning a CoS to an ingenuine role
This is one of the most serious mistakes a care provider can make, and it is being picked up more frequently in 2026. When you assign a Certificate of Sponsorship, you are confirming to the Home Office that the job is real, necessary, and exists within your service. It must reflect genuine demand, with clear duties and actual hours available.
If the Home Office believes the role has been created mainly to facilitate immigration, or that there is not enough work to justify the position, the visa application can be refused. More importantly, your sponsor licence can be suspended or revoked.
This is particularly risky in domiciliary care, where demand can fluctuate. Sponsoring ahead of confirmed care packages or without guaranteed hours can quickly raise concerns during compliance checks.
How to avoid it wrong assignment:
- Only assign a CoS when there is clear and evidenced demand for the role
- Make sure the job exists within your current service, not future projections
- Keep records of care packages, rotas, and staffing gaps to justify the role
- Ensure the job description reflects real duties, not a generic template
- Avoid over sponsoring beyond the actual capacity of your service
6. Choosing the wrong occupation code
The correct occupation code determines if the role meets the Skilled Worker requirements, including skill level and salary thresholds. Each role must match the duties listed under the chosen SOC 2020 code. If the Home Office reviews the application and finds that the day to day responsibilities do not align with the code, the visa can be refused and your compliance record may be questioned.
A common issue in care is assigning a “senior care worker” code when the role does not include genuine supervisory or leadership responsibilities. Even if the title sounds appropriate, it is the actual duties that matter.
You can check the official list of eligible occupation codes here
How to choose the right occupation code:
- Match the job duties to the occupation code, not just the job title
- Review the official SOC descriptions before assigning the CoS
- Make sure responsibilities such as supervision or decision making are genuinely part of the role if using a senior code
- Avoid choosing a code simply because it has a lower salary threshold
- Keep a clear, role specific job description that aligns with the selected code
7. Passing costs on to the worker
This is a strict compliance rule, and the Home Office takes it very seriously.
As a sponsor, you must not ask or expect the worker to pay for any part of the sponsorship process. This includes the Certificate of Sponsorship fee, the sponsor licence fee, or any associated administrative costs.
Even informal arrangements or deductions from salary can be treated as a breach. If the Home Office finds that costs have been passed on to a worker, your licence can be revoked.
How to stay complaint:
- Cover all sponsorship related costs as the employer
- Do not request reimbursement from the worker at any stage
- Avoid making deductions from salary linked to sponsorship costs
- Clearly communicate to staff that they are not responsible for these fees
- Keep records showing that all costs were paid by your organisation
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