Certificate of Sponsorship (CoS) allocation increases are becoming one of the biggest challenges facing UK employers and Sponsor Licence holders in 2026.
With rising demand for sponsored workers across healthcare, care services, and other sectors, many employers are now facing delays, compliance checks, and strict Home Office scrutiny when requesting additional CoS allocations.
For sponsors, timing and accuracy are now critical. Delays, refusals, or incomplete requests can disrupt recruitment plans and leave important roles unfilled for months.
Here’s what every employer needs to know.
What Is a Certificate of Sponsorship (CoS)?
A Certificate of Sponsorship is a digital reference number that allows a sponsored worker to apply for a visa under the Skilled Worker route.
Understanding how Certificate of Sponsorship COS allocation requests work now is essential for employers that rely on sponsored workers to fill critical vacancies across the UK.
There are two types:
- Defined CoS – for workers applying from outside the UK
- Undefined CoS – for workers already in the UK
If your allocation is insufficient, you must request additional CoS from the Home Office.
The Reality: 18-Week Processing Times
One of the biggest challenges currently facing sponsors is significant processing delays.
Requests for additional undefined CoS can take up to 18 weeks to be decided.
Many businesses are experiencing delays because Certificate of Sponsorship COS Allocation requests are now being reviewed more carefully by the Home Office.
This creates real risks:
- Candidates may withdraw
- Start dates are delayed
- Business operations suffer
Waiting until the last minute is no longer an option.
Priority Service: Faster, but Not Guaranteed
To address delays, the Home Office offers a priority service:
- Fee: £350
- Available between 7:00am and 5:00pm
- First come, first served (limited daily slots)
If successful, your request may be decided within 5 working days.
However:
- Slots are extremely limited
- Demand is high
- There is no guarantee you will secure one
Employers often log in right at 7:00am to maximise their chances.
What Your CoS Request Must Include
A poorly prepared request is one of the main reasons for delays or rejection.
Your request should clearly include:
- The number of CoS required
- The job roles and SOC codes
- Salary details (meeting Skilled Worker thresholds)
- Explanation of why additional CoS are needed
- Confirmation of genuine vacancies
- Details of recruitment efforts (if relevant)
The Home Office must be satisfied that:
- The roles are genuine
- The business has a real need
- The request is credible and justified
Common Reasons CoS Requests Are Rejected
Employers often underestimate how strict the Home Office can be.
Frequent issues include:
- Vague or incomplete explanations
- Inconsistencies in job roles or salaries
- Requesting unusually high numbers without justification
- Lack of evidence of genuine vacancies
High Scrutiny for Care Sector Sponsors
Care homes and care providers are under particular scrutiny.
It is now common for the Home Office to:
- Request additional documents
- Carry out compliance checks
- Examine recruitment practices in detail
These requests may include:
- Contracts of employment
- Staffing structures
- Evidence of service users
- Proof of business activity
Compliance Is Critical
Before requesting additional CoS, employers should ensure they are fully compliant.
Before submitting a Certificate of Sponsorship COS Allocation increase request, sponsors should ensure their compliance records and reporting duties are fully up to date.
This includes:
Right to Work Checks
- Must be properly conducted and recorded
- Errors can trigger further investigation
Sponsor Licence Duties
- Accurate record-keeping
- Reporting changes via SMS
- Monitoring sponsored workers
Genuine Vacancy Requirement
- Roles must be real and meet visa criteria
If the Home Office has concerns, your request may be:
- Delayed
- Refused
- Or lead to a licence compliance visit
The increase in CoS demand has made the system more competitive and more scrutinised.
For employers, success now depends on:
- Preparation
- Accuracy
- Timing
A rushed or poorly prepared request can cost you months.
If you need additional CoS:
- Apply early
- Be clear and detailed
- Ensure full compliance
- Be ready for Home Office scrutiny
Refrences
UK government Skilled Worker guidance
GOV.UK Skilled Worker Sponsor Guidance
Sponsor licence duties
GOV.UK Sponsor Licence Responsibilities
As demand continues rising, Certificate of Sponsorship (COS) allocation approvals are becoming more competitive and more heavily scrutinised across multiple sectors.
Many employers underestimate how competitive Certificate of Sponsorship CoS allocation increases have become. The Home Office is now closely reviewing sponsor activity, vacancy legitimacy, and recruitment practices before approving additional allocations.
Sponsors that prepare early, maintain accurate compliance records, and submit detailed requests are far more likely to avoid costly delays and refusals.