How to Get a Certificate of Sponsorship for the UK Skilled Worker Visa

You cannot apply for a UK Skilled Worker visa on your own. You apply only after a UK employer, who holds a Sponsor Licence from the Home Office, assigns you a Certificate of Sponsorship (CoS). This single document — a reference number, not a physical certificate — is the trigger that starts your application clock. Once your employer generates it, you have three months to submit your visa.

For Nigerian professionals, understanding how the CoS works before you start job hunting is not academic. It determines which employers you can target, what salary you must be offered, and whether you need to show personal bank statements at all.

What a Certificate of Sponsorship Actually Is

A CoS is an alphanumeric reference number generated by a licensed UK sponsor through an online UKVI portal called the Sponsor Management System (SMS). It is not a physical document and not something you request — your employer creates it and assigns it to you.

The CoS contains your personal details, the job title, the SOC (Standard Occupational Classification) code, the salary offered, and the employer's sponsor licence number. UKVI reads this when they assess your application. If there is a discrepancy between what the CoS states and what your supporting documents show — different salary, different job title, different start date — that is grounds for refusal.

There are two types of CoS for the Skilled Worker route:

Defined CoS: Assigned before you enter the UK, for workers applying from abroad (which applies to all Nigerian applicants). This type goes through an allocation quota system managed by the Home Office, though most licenced sponsors have automatic access to defined CoS certificates.

Undefined CoS: Used for workers already in the UK who are switching employer or visa category. Not relevant for a fresh application from Nigeria.

The Salary Threshold in 2026

As of 2026, the standard salary threshold for a UK Skilled Worker visa is £41,700 per year. This is set at the UK's median full-time salary — a deliberate policy choice by the government to ensure international hires are in genuinely skilled, competitive-salary roles.

A lower "new entrant" rate of £33,400 (80% of the general threshold) applies in specific circumstances:

• You are switching from a Graduate visa or student visa
• You are under 26 at the time of application
• You are working toward a professional qualification recognized in the UK

For health and care roles, the salary threshold is different and aligned with NHS Agenda for Change pay bands — typically £25,000–£31,300 depending on the specific role.

One additional rule that catches many applicants off guard: the salary offered must also meet the "going rate" for the SOC code. Every occupation code has a published going rate set by the Home Office. If the going rate for your specific SOC code is higher than £41,700, that higher figure applies. An employer cannot pay you £41,700 in a role where the going rate is £52,000 — the visa will be refused.

Check the Appendix Skilled Occupations on GOV.UK for the going rate specific to your role before accepting a job offer.

How Nigerian Professionals Actually Secure a CoS

The CoS comes from the employer, not from UKVI directly. Your job as an applicant is to:

1. Find a job with a UK employer who holds an active Sponsor Licence
2. Negotiate a salary that meets the threshold for your SOC code
3. Confirm the employer is willing to assign you a CoS

The Home Office publishes a Register of Licensed Sponsors on GOV.UK, searchable by employer name. This is the first check you should run on any UK employer who approaches you or whom you approach — if they are not on this list, they cannot sponsor you, regardless of how genuine the job offer is.

The most consistent sources of CoS assignments for Nigerian professionals in 2026 are:

• NHS Trusts and private healthcare providers: The largest sponsor infrastructure in the UK, with particular demand for nurses, physiotherapists, pharmacists, and certain medical grades
• IT and tech firms: High CoS issuance for software engineers, data analysts, and cybersecurity professionals with RQF Level 6 qualifications
• Engineering and infrastructure: Civil, mechanical, and electrical engineering roles often at or above the £41,700 threshold

If an employer not on the Register is offering to "sort out" your visa, that is a risk. Unlicensed sponsors who claim to have arrangements with third-party licensees are the operational model of the "black market" agents charging £5,000–£13,000 for "guaranteed visas" — and the visa is typically based on a fraudulent or misrepresented job record, which results in a 10-year deception ban.

The CoS and the Maintenance Requirement

Once your employer issues the CoS, they have the option to tick a "certify maintenance" box within the Sponsor Management System. If they do this, it means they are confirming they will support you financially during your initial period in the UK.

The practical effect: if your employer certifies maintenance on the CoS, you do not need to show £1,270 in personal savings held for 28 consecutive days. This removes the most common cause of visa refusal for Nigerian applicants — the scrutiny around bank statement patterns, Naira volatility calculations, and accusations of "funds parking."

Ask your employer explicitly whether they are willing to certify maintenance. Most A-rated sponsors in the NHS and large corporate environments do this as standard. Smaller employers may not know they have this option.

The Genuine Vacancy Test

In 2026, UKVI increasingly applies a "genuine vacancy" test to applications from Nigerian nationals. Caseworkers look at whether the job offer is a real professional vacancy or an arrangement designed primarily to generate a visa.

High-risk signals include:

• A very small employer with no track record of international hires
• A salary exactly at the minimum threshold with no rationale
• A role description that does not align with the applicant's documented experience
• No evidence of a structured recruitment process

Strong signals include documented interview records, publicly posted job advertisements, and clear progression from the applicant's Nigerian employment history to the UK role. The cover letter you submit with your application is the primary vehicle for bridging these signals — it is not a formality.

Starting the Process Before You Have an Offer

The three-month CoS expiry window is a source of real stress for applicants who have not prepared Nigerian-side documents in advance. The POSSAP police certificate alone can take three to four weeks if you start from scratch. Add an Ecctis assessment (20 working days), a TB test, and university transcript requests, and you can easily exhaust the three-month window before submitting.

The practical strategy is to begin document procurement — POSSAP application, TB test booking, transcript request — before a CoS is in hand. None of these documents require a CoS number to obtain, and all of them have validity periods of at least six months. By the time your employer generates the CoS, you should be in the final stages of document preparation, not the first.

The Nigeria → UK Skilled Worker Guide includes the exact sequence — what to start on day one of your job search, what to start when you receive an offer, and what to leave until the CoS is confirmed — so the three months stay manageable.

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