Case Study: Skilled Worker Extension Approved After the Employer's CoS Delay Ran Past the Visa Expiry Date
At a glance
The client. A Filipino national in her early thirties who has lived in the UK continuously for around four and a half years. She works as a care assistant at a CQC-registered care home in Bristol and was first sponsored as a care worker before March 2024. Her Skilled Worker permission (Health and Care visa) was due to expire on 11 August 2026. Her employer wanted to keep her, but four days before the expiry date it still had not assigned her certificate of sponsorship (CoS).
What I did. I did not let her wait for the employer. I submitted her extension application on 7 August 2026, before her permission expired, with the CoS marked as not yet available. That protected her immigration status, her right to work and her place in the transitional rules for care workers. When the employer finally assigned the CoS on 28 August 2026, 17 days after her visa would have expired, I sent the Home Office a supporting cover letter with the CoS details and a full case against each requirement of Appendix Skilled Worker. The application was approved on 29 September 2026, with no requests for further information.
What Happens If Your Employer Hasn't Assigned Your CoS Before Your Visa Expires?
This is a situation we see more often than it should happen. A sponsored worker's visa is about to run out, the employer has agreed to renew the sponsorship, and the CoS simply has not been assigned. The worker cannot assign it themselves. All they can do is chase.
If they wait and the visa expires, the consequences are serious. They become an overstayer. They lose the right to work. And they lose their continuous permission, which for many workers is what keeps them eligible for the route at all.
For our client, the timeline looked like this:
Date | What happened |
7 August 2026 | We submit her extension application, with no CoS yet assigned |
11 August 2026 | Her Skilled Worker permission is due to expire |
28 August 2026 | Employer assigns the CoS, 17 days after that expiry date |
Why Was a Gap in Permission So Dangerous for a Care Worker?
Because her eligibility depended entirely on continuous permission. Since 22 July 2025 the Skilled Worker skill threshold has been RQF level 6, and care worker roles (occupation code 6135) are skilled at RQF level 3. Care workers already on the route can extend only under the transitional arrangements, which require continuous permission as a Skilled Worker since before that date.
The same applied to her salary. She was paid £12.82 an hour for 42 hours a week, £27,998.88 a year. That met the lower thresholds under tradeable points options F to J, which are open only to those granted permission before 4 April 2024 who have held continuous permission since. It also allowed her to rely on the B1 English language standard from her previous grant, rather than the B2 standard that applies to new applicants from 8 January 2026.
A break in permission could have closed all three doors at once. She could have lost not just her visa but her ability to work as a care worker in the UK at all.
Can You Apply for a Skilled Worker Extension Without a CoS?
You can submit the application, but it carries a risk. Home Office guidance says the CoS reference number should be given in the application. If it is missing, the applicant must explain why. If the caseworker is not satisfied a CoS has been assigned, the application may be rejected as invalid.
We weighed that risk against the alternative. Waiting meant certain overstaying. Applying in time meant she would keep her existing permission under section 3C of the Immigration Act 1971 while the application was pending, provided it was accepted. On those terms, applying was the only sensible choice.
How Did We Make the Application Work?
We completed the application form in full on 7 August 2026, four days before her permission expired. Everything except the CoS number was in place: the sponsor's details, her job title, her salary, the Immigration Salary List confirmation and her previous English language evidence. The form recorded honestly that she did not yet have a CoS reference number.
We then kept the pressure on the employer. When the CoS was assigned on 28 August 2026, we checked every field against the application before sending it to the Home Office. The job, salary, hours, work address and occupation code all matched.
What Did the Cover Letter Need to Do?
It had two jobs. The first was to give the caseworker the missing CoS. We opened with a clear statement that the application had been submitted in time, before the CoS was available, and then set out every detail of the certificate: the number, the sponsor licence, the date assigned and the work dates. We stated plainly that the delay rested with the sponsor, not the applicant, and offered to obtain written confirmation from the employer if needed.
The second job was to leave no other questions open. We worked through each requirement in the order of the Home Office caseworker guidance:
Sponsorship (SW 5.1 to 5.7): a valid licence, a genuine and established role, CQC registration and compliance with National Minimum Wage and Working Time rules.
Skill level (SW 6.1 to 6.5): occupation code 6135 under the transitional arrangements, with continuous permission since before 22 July 2025.
English language (SW 7.1 to 7.4): the B1 standard carried over from her previous successful grant.
Tradeable points: option I, salary and a job on the Immigration Salary List, with £27,998.88 against the £25,000 threshold.
Financial requirement: met automatically after more than 12 months in the UK with permission.
Suitability: no breaches, no refusals, no adverse history.
By the time the caseworker reached the end of the letter, the only unusual feature of the case had been explained and the rest had been shown to be routine.
What Was the Outcome?
The application was approved on 29 September 2026, just under eight weeks after submission and a little over four weeks after we supplied the CoS. The Home Office made no requests for further information or clarification. She was granted permission to continue as a care assistant with the same employer until 12 September 2028, 14 days after the end date on her CoS. She never became an overstayer, never lost her right to work, and kept her continuous permission under the transitional arrangements for care workers.
What Does This Mean for Sponsored Workers and Employers?
If your visa is about to expire and your employer has not assigned your CoS, do not wait. An in-time application, properly prepared and followed up as soon as the CoS is assigned, can protect your status in a way that nothing done after expiry can. Once your permission has run out, you are relying on the Home Office's discretion rather than your rights.
For sponsors, the lesson is simpler: start early. A CoS can be assigned up to three months before the application, so there is rarely a good reason to leave it to the last week. Check your CoS allocation well in advance, make sure your Authorising Officer and Level 1 User are available, and keep your sponsor licence details up to date.
Three things made the difference here: applying before the expiry date rather than waiting for the employer, supplying the CoS with a clear explanation as soon as it was assigned, and presenting the full case against every requirement so the caseworker had nothing left to ask.
Is Your Visa Expiring Without a CoS?
At UK Immigration Pathways, we act for sponsored workers and licensed sponsors on Skilled Worker and Health and Care visa extensions, changes of employment and urgent in-time applications. We also help employers plan CoS assignment so their workers never reach this point.
Call: 0121 812 6600
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