Are you an employer looking to hire a skilled worker from overseas? Therefore, understanding the certificate of sponsorship UK process is your most critical first step. Without a valid CoS, your candidate cannot apply for a UK work visa — regardless of their qualifications or how urgently you need them.
At Michael Vincent, we are OISC Level 3 registered. Consequently, we guide employers through the entire CoS process accurately and efficiently — from first application to visa approval.
📞 Contact us today for expert CoS assistance.
What Is a Certificate of Sponsorship UK?
A certificate of sponsorship UK is not a physical document. Specifically, it is a unique digital reference number generated through the Home Office’s Sponsor Management System (SMS). It confirms the key details of your sponsored employment, including:
- The job title and Standard Occupational Classification (SOC) code
- The worker’s salary and working hours
- The start date and work location
- The worker’s personal details
Moreover, the worker uses this reference number when applying for their Skilled Worker visa. Furthermore, the Home Office cross-references every detail on the CoS against the visa application. Consequently, even minor errors can trigger an automatic refusal.
Source: GOV.UK — Sponsor a Worker: Part 2 Guidance
Who Can Issue a Certificate of Sponsorship UK?
Only employers holding a valid UK Sponsor Licence can issue a certificate of sponsorship. Therefore, if your business does not yet have a sponsor licence, you must obtain one first.
Additionally, only authorised personnel within your organisation — specifically your Level 1 User or Authorising Officer — can access the SMS to create and assign a CoS.
Two Types of Certificate of Sponsorship UK
This is one of the most important distinctions in UK sponsorship. Specifically, there are two types of CoS under the Skilled Worker route. Consequently, using the wrong type causes automatic visa refusal — with no refund of your fee.
Defined Certificate of Sponsorship UK
A Defined CoS is used when your worker is applying for a visa from outside the UK (entry clearance). Specifically:
- Each Defined CoS must be individually requested and approved by the Home Office through the SMS
- Requests are typically processed within 1 working day
- However, complex cases may take up to 5 working days
- You cannot hold a stock of Defined CoS in advance — you must apply for each one as needed
Undefined Certificate of Sponsorship UK
An Undefined CoS is used when your worker is already in the UK and switching visa categories or extending their stay. For example, a Graduate visa holder moving to a Skilled Worker visa. Additionally:
- These come from your pre-allocated annual quota in the SMS
- They are available immediately — no Home Office approval required before assignment
- They are also used for all other sponsored work routes, including Global Business Mobility and Temporary Worker routes
Certificate of Sponsorship UK — Fees 2026
Understanding all costs upfront is essential for budget planning. Therefore, here is a complete breakdown of CoS-related costs:
| Fee Item | Cost (2026) |
|---|---|
| CoS Assignment Fee — Skilled Worker route | £525 per certificate |
| CoS Assignment Fee — Temporary Worker route | £55 per certificate |
| Immigration Skills Charge — Small/Charitable Sponsor | £480 per year of sponsorship |
| Immigration Skills Charge — Medium/Large Sponsor | £1,320 per year of sponsorship |
| Priority CoS Allocation Increase | £200 |
💡 Important: The CoS fee is non-refundable even if the certificate is cancelled or the visa is refused. Moreover, the Immigration Skills Charge must be paid in full at the time of CoS assignment — not later. Furthermore, Health and Care Worker visa applicants are exempt from the Immigration Skills Charge.
Certificate of Sponsorship UK Validity
Once assigned, a certificate of sponsorship UK is valid for 3 months from the date of issue. Consequently, your worker must submit their visa application within this 3-month window. If they do not, the CoS expires and cannot be revived. As a result, you must request a new CoS and pay the £525 fee again.
Therefore, careful timing between CoS assignment and visa application is critical. Moreover, the job start date on the CoS must not be more than 3 months in the future at the time of the visa application.
Salary Requirements
Every certificate of sponsorship UK must show a salary that meets two thresholds simultaneously. Specifically, you must pay whichever is higher:
Threshold 1 — General Salary Threshold
The minimum general salary for most Skilled Worker roles is £41,700 per year (updated from April 2026).
Threshold 2 — Going Rate for the SOC Code
Additionally, every role has a specific going rate based on its Standard Occupational Classification (SOC) code. Therefore, you must check the GOV.UK Appendix Skilled Occupations table to confirm the going rate for your specific role.
Salary Discounts Available
Moreover, certain applicants qualify for reduced salary thresholds:
- Immigration Salary List (ISL) roles — 20% discount on the going rate
- New entrants (under 26, switching from Student visa, postdoctoral roles) — 70% of going rate, minimum £30,960
- Health and Care Worker visa — separate, lower thresholds apply
How to Assign a Certificate of Sponsorship UK — Step by Step
Step 1 — Confirm Role Eligibility
First, verify that your role is eligible for the Skilled Worker route. Specifically, it must be at RQF Level 3 or above and appear on the GOV.UK eligible occupations list.
Step 2 — Identify the Correct SOC Code
Additionally, use the ONS occupation lookup tool to identify the correct SOC code for your role. Consequently, this determines the going rate salary and eligibility for sponsorship.
Step 3 — Confirm the CoS Type Needed
Furthermore, determine whether you need a Defined CoS (worker applying from overseas) or an Undefined CoS (worker already in the UK). This single decision affects your entire recruitment timeline.
Step 4 — Log Into the Sponsor Management System
Access the SMS using your Level 1 User credentials. Only authorised personnel can create and assign a CoS.
Step 5 — Submit the CoS Request
For a Defined CoS, submit your request through the SMS, including the job details, SOC code, salary, and worker’s nationality. The Home Office typically processes this within 1 working day.
Step 6 — Pay All Required Fees
Pay the £525 CoS assignment fee and the Immigration Skills Charge in full at this stage. Moreover, ensure you budget for the full duration of the planned sponsorship period.
Step 7 — Assign the CoS to Your Worker
Once approved, assign the CoS and share the unique CoS reference number with your worker. They will need this to complete their visa application.
Step 8 — Worker Submits Visa Application
Your worker must then apply for their Skilled Worker visa within 3 months of the CoS being assigned. Furthermore, every detail in their application must match the CoS exactly.
Most Common CoS Mistakes That Cause Visa Refusals
Even a middle name included on one document but not the other, or a transposed digit in the passport number, can trigger refusal. Therefore, precision is everything. Here are the most common errors we see:
- Wrong CoS type — using a Defined CoS for a UK-based worker, or an Undefined CoS for an overseas applicant — causes automatic refusal
- Salary below threshold — the salary on the CoS must meet both the general threshold and the going rate
- Incorrect SOC code — guessing instead of verifying causes eligibility failures
- Name mismatch — the worker’s name on the CoS must match their passport exactly
- Unrealistic start date — set too early before visa processing is complete
- Forgetting the Immigration Skills Charge — the CoS is invalid without it
- Missing qualifications — the CoS must reference qualifications meeting at least RQF Level 3
- Role or salary change after assignment — any changes must be updated in the SMS immediately or it becomes a compliance breach
Your Ongoing Compliance Obligations After Assigning a CoS
Assigning a certificate of sponsorship UK is not a one-time action. Consequently, it triggers ongoing compliance duties that the Home Office actively monitors and enforces through scheduled and unannounced compliance visits. Specifically, you must:
- Ensure the worker performs the role described on the CoS
- Ensure salary payments match the amount stated on the CoS
- Report certain events through the SMS, including termination of employment or unexplained absences
- Report any significant change to the worker’s role or work location
- Maintain a complete compliance file for each sponsored worker, including contracts, job descriptions, and salary evidence
- Cancel unused or withdrawn CoS certificates promptly via the SMS
- Track visa expiry dates and act before they lapse
⚠️ Failure to comply can result in your sponsor licence being downgraded or revoked. Consequently, all workers you sponsor could lose their right to work in the UK.
CoS Allocation — How It Works
When your sponsor licence is first granted, the Home Office assigns you an annual allocation of Undefined CoS. However, you must apply for Defined CoS individually as and when you need them.
Furthermore, if you exhaust your Undefined CoS allocation, you can request more through the SMS. Standard increase requests are typically processed within 18 weeks, though most are resolved sooner. Therefore, forward planning is essential — particularly for high-volume employers such as care providers or consultancies.
Additionally, a priority increase service is available for Undefined CoS allocations at a cost of £200, reducing the wait time significantly.
Frequently Asked Questions — Certificate of Sponsorship UK
Do I need a sponsor licence before I can issue a CoS?
Yes. Furthermore, your sponsor licence must be active and in good standing. Without it, you cannot access the SMS or issue any certificate of sponsorship.
What happens if my worker does not apply within 3 months?
The CoS expires and cannot be extended or revived. Therefore, you must request a new CoS and pay the £525 fee again. Consequently, careful timing is essential.
Can I amend a CoS after it has been assigned?
Yes, in certain circumstances. However, if the role, salary, or work location changes significantly, you must update the CoS through the SMS promptly. Failure to do so is a compliance breach.
What is the difference between a CoS and a Sponsor Licence?
A sponsor licence is the authorisation that allows your company to sponsor migrant workers. It lasts 4 years and costs £611 (small sponsor) or £1,682 (large sponsor). A certificate of sponsorship is the individual digital record you assign to each specific worker. Therefore, you need a sponsor licence first — the CoS comes afterwards.
Source: GOV.UK — Apply for a Sponsor Licence
Why Choose Michael Vincent to Handle Your Certificate of Sponsorship?
Managing a certificate of sponsorship UK involves far more than filling in an online form. Consequently, the smallest error can cost you your entire recruitment investment. Here is why employers across the UK and internationally trust Michael Vincent:
- ✅ OISC Level 3 Registered — the highest regulatory level for immigration services
- ✅ Full CoS document preparation — every field checked before submission
- ✅ SOC code verification — we confirm the correct code so you never pay the wrong going rate
- ✅ Defined vs Undefined confirmation — we eliminate the single biggest cause of refusal
- ✅ Immigration Skills Charge calculation — budgeted correctly for your organisation size
- ✅ Ongoing compliance support — we keep your sponsorship duties on track after CoS assignment
- ✅ Sponsor licence applications — if you do not yet have a licence, we handle that too
Furthermore, we serve employers across London, the USA, Canada, and globally. Therefore, wherever your business operates, we can support your international recruitment needs.
Get Your Certificate of Sponsorship Right — First Time
A single error on your certificate of sponsorship UK can delay your hire by weeks and cost you thousands in wasted fees. Therefore, get expert help from the very beginning.
📞 Call us now: +44 7475 388153 | +44 7475 239409 📧 Complete our contact form below for a free initial assessment.
We are OISC Level 3 registered. As a result, your CoS and your sponsor compliance are in expert, regulated hands.