Before you accept a sponsored job offer, you need to verify four things: that the employer holds a valid sponsor licence, that the salary meets Home Office thresholds, that the Certificate of Sponsorship terms are accurate, and that no one is asking you to pay for anything they should not be charging. Miss any one of these and the consequences range from a refused visa application to an exploitative working situation you will struggle to exit.

This guide is for job seekers who have received — or are close to receiving — a sponsored job offer, primarily in the context of the UK Skilled Worker route, though many principles apply to sponsored work internationally. It is not legal advice. Where your situation involves genuine eligibility risk or legal complexity, consult a solicitor regulated by the Solicitors Regulation Authority (SRA) or an adviser registered with the Office of the Immigration Services Commissioner (OISC).


Why Due Diligence on a Sponsored Offer Is Non-Negotiable

A sponsored job offer is not like a regular job offer. In a standard domestic hire, if the employer turns out to be unreliable, you can resign and move on. In a sponsored arrangement, your legal right to live and work in the country is directly tied to that employer's behaviour and compliance record. If their sponsor licence is suspended or revoked, your visa status is affected. If their CoS contained errors, your application may be refused. If you accepted a lower salary than the permitted minimum, you could be found in breach of your visa conditions even though you were not at fault.

Understanding what visa sponsorship actually means for a job seeker is the essential starting point. This guide builds on that foundation with the specific checks you need to run before you sign.


Check 1: Verify the Employer's Sponsor Licence

How to search the Register of Licensed Sponsors

The Home Office publishes a Register of Licensed Sponsors on gov.uk. It is freely searchable — you do not need an account, a reference number, or any special access. Search by the employer's legal entity name (not their trading name, if different) and confirm:

  • The licence appears and is marked active
  • The licence covers the correct route — for most professional and skilled roles this will be the Worker (Skilled Worker) licence, not the Temporary Worker licence
  • The employer's registered address matches what appears in your offer documents

This takes less than five minutes and is the single most important check on this list. See our more detailed walkthrough in How to Check If a Company Has a UK Sponsor Licence.

What if the employer says they are "in the process" of getting a licence?

An employer who does not yet hold a licence cannot lawfully assign a Certificate of Sponsorship. Some employers genuinely are applying for a licence and will obtain one before the hire completes — but you should not resign from any current role, relocate, or incur costs on the assumption that a licence will be granted. The application process has a variable timeline (see UK Sponsor Licence Application Timeline for detail) and applications are sometimes refused. Unless the licence is confirmed on the register, treat the offer as unconfirmed.

Warning signs that a licence claim may be false

  • The employer cannot name the route their licence covers
  • They pressure you to begin work "while the paperwork catches up"
  • They ask you to work on a tourist or student visa temporarily, promising to switch you later
  • They cannot tell you who in the organisation manages sponsorship compliance

None of these automatically proves fraud, but each is a reason to pause, ask direct questions, and — if answers remain vague — seek independent advice before proceeding.


Check 2: Confirm the Salary Against Current Home Office Thresholds

The general threshold and the going rate rule

The UK Skilled Worker route requires your salary to meet whichever is higher: the general salary threshold or the occupation-specific going rate. As of 2026, the general threshold is indicatively £38,700 gross per year for most applicants, but this figure is subject to revision — verify the current number on gov.uk before making any decisions. The going rate is set by occupation code (SOC code), and some roles carry rates that significantly exceed the general threshold.

Your employer should be able to tell you the Standard Occupational Classification (SOC) code assigned to your role, because they will have used this when applying for the Certificate of Sponsorship. If they cannot or will not confirm it, that is a problem. The SOC code determines not only the going rate but whether the role is eligible for the Skilled Worker route at all.

Illustrative example

Suppose you are offered a role as a senior accountant at £40,000 per year. The general threshold is met. But if the going rate for that SOC code is £45,000, the offer is below the minimum permitted and the CoS cannot lawfully be assigned at that salary. The employer would need either to raise the salary or — in limited circumstances — to demonstrate that specific tradeable points apply. This is not a negotiation tactic; it is a compliance requirement. For roles in accountancy specifically, our guide to Accountant Jobs in the UK with Visa Sponsorship 2026 covers what competitive and compliant salaries look like in practice.

Salary reductions and deductions

Check whether the salary stated is gross before any deductions, and whether any deductions — for accommodation, meals, uniform, or equipment — are proposed. The Home Office's guidance on salary adequacy is specific: if an employer makes deductions that bring the worker's effective pay below threshold, this can constitute a breach of sponsorship duties and, in some cases, minimum wage law. Get written confirmation that the quoted salary is what will appear on your payslip before standard statutory deductions (tax and National Insurance), with no further employer-initiated deductions.


Check 3: Read the Certificate of Sponsorship Details Carefully

What a CoS contains and why every field matters

The Certificate of Sponsorship is a digital record — a reference number you use when making your visa application — but it carries a large amount of factual content: your name, date of birth, job title, SOC code, salary, hours, employer details, and start date. Every piece of information on the CoS is checked by UKVI against your supporting documents and your visa application form. Any mismatch — even a name spelled differently from your passport — can trigger a request for further information or a refusal.

Before you apply for your visa, ask your employer to share the CoS reference number and all the details it contains. You are entitled to this information. Cross-check every field against your passport, your offer letter, and the salary you agreed in writing.

The CoS validity window

Once a CoS is assigned to you, you typically have three months to submit your visa application. This window is stated on the CoS itself. If you miss it, the CoS expires and the employer must assign a new one — which has resource and sometimes cost implications. Plan your application timeline from the moment you receive the CoS reference, not from the date you decide to proceed.

For a fuller explanation of how the CoS fits into the overall sponsorship process, see our guide on Visa Sponsorship Application Process End to End.

Restricted versus unrestricted CoS

For roles where the sponsor has a sufficient allocation of unrestricted Certificates of Sponsorship, the process is relatively straightforward. For certain roles — previously those above a high salary threshold or in specific public sector contexts — a restricted CoS may be required, which involves a monthly Home Office allocation and a longer timeline. Ask your employer which type of CoS they are assigning and whether there is any queue or allocation risk before you hand in your notice elsewhere.


Check 4: Understand Your Rights Around Fees

The absolute rule: you must not pay for a job or a visa

Under the UK's sponsorship framework, employers are prohibited from passing the cost of obtaining a sponsor licence or assigning a Certificate of Sponsorship on to the worker. The Immigration Skills Charge — a government levy paid by employers when they assign a CoS — is entirely the employer's liability. You should pay nothing towards it, directly or indirectly.

More broadly, no legitimate employer or recruitment agent should ever charge a worker a fee in exchange for a job offer or for facilitating visa sponsorship. This is not merely unethical — in many contexts it constitutes an offence under the Modern Slavery Act 2015 and related labour exploitation legislation.

If anyone — an employer, a recruiter, or a third-party "visa consultant" — asks you to pay:

  • A placement fee
  • A "processing fee" for the CoS
  • A deposit against your visa costs
  • A fee to be included on a shortlist or register

Treat this as a serious red flag. Legitimate employers absorb the cost of sponsorship as part of their hiring budget. Report concerns to the Gangmasters and Labour Abuse Authority (GLAA) or the Home Office's immigration enforcement reporting line.

What you may legitimately pay yourself

You will normally pay your own visa application fee, the Immigration Health Surcharge (IHS), and any document translation or legal costs if you choose to use an immigration solicitor. These are your personal application costs, not employer-imposed fees. Some employers do reimburse visa fees as a matter of policy, but this is a benefit, not an obligation.


Check 5: Scrutinise the Contract Terms Around Tied Conditions

Clawback clauses

Some sponsored employment contracts include clauses requiring you to repay a portion of costs if you leave within a specified period — most commonly, reimbursement of visa fees the employer paid on your behalf. These clauses are not automatically unlawful, but they must be reasonable in scope and should be clearly explained before you sign.

Before accepting, ask:

  • Is there a clawback clause? What does it cover?
  • What is the repayment amount and over what period does it reduce?
  • Does it apply if the employer terminates your employment, or only if you resign?

A clause that covers the employer's own Immigration Skills Charge costs is of questionable enforceability in many circumstances, but you should take legal advice rather than assume it will not be enforced.

Tied accommodation or services

If the employer provides accommodation as part of the package, check whether it is genuinely optional or effectively compulsory, what the deduction from salary will be, and whether that deduction affects your compliance with the salary threshold. Workers in care, agriculture, and hospitality are particularly likely to encounter tied accommodation arrangements. Our guides to Care Assistant Jobs in the UK with Visa Sponsorship 2026 explore some of these dynamics in specific sector contexts.


Comparison Table: Legitimate Offer vs Warning Signs

Factor Legitimate sponsored offer Warning sign
Sponsor licence Verifiable on gov.uk register "We are applying" or not listed
Salary At or above threshold and going rate Below threshold, vague, or "TBC"
CoS details Provided in writing before visa application Refused or delayed without explanation
Fees charged to worker None for job or CoS Any payment requested
Contract terms Clear clawback scope, signed before start Verbal-only promises, unsigned docs
Job role match SOC code disclosed, role description consistent Role described differently after hire
Right to work checks Employer conducts these before day one Employer skips or ignores these
Communication HR/legal contact named, responsive Only a WhatsApp number or recruiter intermediary

Common Mistakes — and How to Avoid Them

  1. Accepting on the basis of a verbal promise. Always get the CoS reference number and offer letter in writing before resigning from your current role or booking travel. Fix: request a signed offer letter and CoS details as a condition of your acceptance.

  2. Not checking the register. Candidates trust employers who use professional-sounding language. The register check takes under five minutes and costs nothing. Fix: search the Home Office Register of Licensed Sponsors before you progress past the verbal offer stage.

  3. Assuming the salary is compliant because the employer says so. Employers can and do make good-faith errors on going rates, particularly when using SOC codes they are unfamiliar with. Fix: independently verify the going rate for your SOC code on gov.uk using the Skilled Worker visa salary requirements page.

  4. Missing the CoS expiry window. Candidates receive the CoS, feel reassured, and delay the visa application. Fix: book your biometric appointment and begin document gathering within days of receiving the CoS, not weeks.

  5. Signing a contract with a broad clawback clause without understanding it. Some clauses require repayment of amounts the employer was legally required to pay regardless. Fix: have a solicitor review any clawback clause before you sign, especially if the repayment period exceeds twelve months.

  6. Paying a recruitment fee. Some fraudulent actors pose as both employer and recruiter and charge for "visa processing." Fix: if money is requested before or during the hiring process, stop, do not pay, and report via the Home Office's immigration enforcement referral process.


Sector-Specific Considerations

The checks above apply universally, but some sectors carry additional nuance.

Healthcare and care work: The care sector has seen high-profile enforcement action against unscrupulous sponsors. If you are considering a care role, review the specific checks around accommodation deductions and tied working arrangements. See also Care Assistant Jobs in Australia & NZ with Visa Sponsorship 2026 if you are weighing up destination countries.

Technology: Tech employers often sponsor at volume and have well-established HR processes, but smaller startups may be applying for a licence for the first time and can make procedural errors. How to Find Companies That Sponsor Work Visas is a useful companion if you are still at the employer identification stage.

Agriculture and seasonal work: Seasonal and agricultural roles sometimes operate under different visa categories (such as the Seasonal Worker route) with different rules around duration, accommodation, and tied employment. Never assume the same rules apply across different visa routes without checking.


Before You Sign: A Practical Pre-Acceptance Checklist

Use this as a reference document in the days between receiving and accepting a sponsored offer.

  • [ ] Employer name confirmed on the Home Office Register of Licensed Sponsors
  • [ ] Licence type confirmed as covering the correct route (e.g. Skilled Worker, not Temporary Worker)
  • [ ] Salary confirmed in writing, gross, with SOC code stated
  • [ ] Salary independently verified as meeting the general threshold and occupational going rate
  • [ ] CoS reference number received or confirmed as being assigned imminently
  • [ ] All CoS details cross-checked against passport and offer letter
  • [ ] CoS expiry date noted and visa application timeline planned
  • [ ] Confirmation in writing that no fees are charged to the worker for the CoS or job offer
  • [ ] Clawback clause reviewed and scope understood (seek legal advice if uncertain)
  • [ ] Any accommodation deductions confirmed as not reducing effective salary below threshold
  • [ ] Contact name and details confirmed for the employer's HR or sponsorship compliance team
  • [ ] You have not been asked to work before the visa is granted

When to Walk Away

Not every problem with a sponsored offer means the employer is acting in bad faith. Genuinely compliant employers can make administrative errors, miscommunicate timelines, or be unfamiliar with some of the finer rules. If you raise a concern and the employer engages substantively, corrects the issue in writing, and demonstrates understanding of their obligations, that is a positive sign.

Walk away — or at minimum pause and take independent legal advice — if:

  • The employer cannot or will not confirm their sponsor licence status
  • The salary offered is below threshold and they dispute this when you raise it
  • Anyone asks you to pay for the job, the CoS, or the visa processing
  • You are asked to start work before your visa is issued
  • Contract terms are changed verbally after you raise questions
  • You cannot get anything in writing

For those still at the stage of finding and approaching employers, How to Ask an Employer About Visa Sponsorship sets out how to have these conversations professionally and what responses tell you about the employer's competence.


This article provides general information only. It is not immigration legal advice and cannot substitute for advice from a solicitor regulated by the SRA or an adviser registered with the OISC. Fees, thresholds, and policy rules are subject to change; always verify against current guidance on gov.uk before making any decisions.