Holding a sponsor licence under the UK immigration system allows your business to recruit global talent through the Skilled Worker route. However, with that opportunity comes significant regulatory responsibility.
A mock sponsor licence compliance check is a simulated audit designed to assess whether a business is meeting its UKVI sponsor licence duties before a Home Office inspection takes place.
These simulated audits, conducted by immigration specialists, review HR systems, employee records and Sponsor Management System (SMS) reporting to identify compliance gaps such as incomplete right to work checks or failures to report key changes.
By identifying issues early, businesses can reduce the risk of sponsor licence suspension or revocation by the Home Office.
This guide explains:
- What sponsor licence compliance duties involve
- What happens during a Home Office sponsor compliance visit
- Fines for first and repeated breaches
- What must be reported to UKVI
- What triggers a compliance inspection
- The difference between suspension, downgrade and revocation
- How a mock sponsor licence audit UK employers trust can help protect their business
Last updated: March 2026. Sponsor licence compliance rules and enforcement trends can change, so it is important for employers to keep their HR systems and reporting procedures under regular review.
Summary: Key points sponsor compliance visits and licence risks at a glance
- UK sponsor licence holders must meet strict record-keeping, reporting, and right to work compliance duties under rules set by the Home Office and UK Visas and Immigration (UKVI).
- Failure to comply can lead to civil penalties for illegal working (up to £60,000 per worker), licence suspension, licence revocation, and public naming.
- Sponsors must report key changes via the Sponsor Management System (SMS) within 10 working days, including worker absences, resignations and organisational changes.
- A Home Office sponsor compliance visit can be announced, unannounced or random, and inspectors will review HR systems, interview staff and audit migrant personnel files.
- A mock sponsor compliance audit by Mulgrave Law helps businesses identify risks early, strengthen internal systems and protect their sponsor licence from suspension or revocation.
Understanding sponsor licence responsibilities – What are sponsor licence compliance duties?
Compliance duties fall into four core areas: maintaining accurate records, reporting changes to the Home Office, ensuring adherence to immigration rules, and preventing illegal working. Each area carries specific responsibilities, and failure to meet them can result in fines, licence suspension, or revocation.
1. Record-keeping duties
Maintaining accurate and up-to-date records is one of the most critical responsibilities of a sponsor licence holder. Proper record-keeping helps demonstrate compliance to the Home Office during inspections and protects your business from fines, suspension, or revocation.
You must ensure your records include:
- Evidence of compliant right to work checks:
Keep copies of documents verifying that every employee is legally allowed to work in the UK. This is essential to maintain your statutory excuse against civil penalties for illegal working.
- Clear passport and visa copies:
Retain readable, dated copies of passports and any visas or residence permits for all sponsored workers. These serve as proof of entitlement to work.
- Up-to-date contact details:
Maintain current addresses, phone numbers, and email addresses for all sponsored staff to ensure the Home Office can contact them if required.
- Employment contracts:
Store copies of contracts for all sponsored workers, showing job title, duties, salary, and start dates. These contracts should match the information submitted to the Home Office.
- Salary records:
Keep payroll records demonstrating that the salary paid aligns with the Certificate of Sponsorship and meets the required thresholds for the role.
- Job descriptions matching the SOC code:
Ensure job descriptions accurately reflect the role’s Standard Occupational Classification (SOC) code used in your sponsorship application.
- Absence records:
Track all absences and leave for sponsored staff. This is crucial for reporting unauthorised absences or extended periods of non-attendance.
Poor record-keeping is one of the most common reasons for a sponsor licence suspension. Organisations that fail to maintain accurate documentation risk non-compliance findings during a Home Office sponsor compliance visit, which can lead to fines, licence suspension, or revocation.
2. Compliance with immigration rules
Sponsors must ensure that all activities relating to their sponsored staff comply fully with UK immigration law. This is broader than reporting and includes verifying the genuineness of roles and monitoring conditions of stay. Key points include:
- Genuine vacancies:
Ensure the sponsored role is real, necessary, and aligns with the SOC code used in your Certificate of Sponsorship.
- Salary thresholds:
Verify that the worker’s salary meets Home Office requirements for their visa category. - Visa conditions:
Monitor that sponsored employees are working in the roles and locations permitted by their visa. - Contract alignment:
Ensure employment contracts reflect the duties, hours, and salary submitted to the Home Office.
Non-compliance can lead to civil penalties, licence downgrade, or curtailment of a worker’s visa.
3. Preventing illegal working
One of the most serious responsibilities of a sponsor is preventing illegal working within your workforce. This duty extends beyond sponsored staff to any employee you hire. Key responsibilities include:
- Right to work checks:
Conduct compliant checks before employment begins and retain evidence in personnel files. - Monitoring ongoing eligibility:
Re-check right to work documents for staff whose permission to work may expire or change. - Training HR and recruitment staff:
Ensure employees responsible for hiring understand how to identify illegal workers and maintain compliance. - Prompt action on breaches:
If illegal working is discovered, take immediate action to correct the issue and report as necessary.
Failure to prevent illegal working can lead to civil penalties of up to £60,000 per worker, licence suspension, revocation, and reputational damage.
What triggers a Home Office sponsor compliance visit?
“Does the Home Office carry out random sponsor compliance visits?” The answer is yes, but random checks are only part of the picture. Most inspections are intelligence-led or triggered by risk factors such as data inconsistencies, high staff turnover, sector trends, or previous compliance issues. Understanding these triggers can help sponsors take proactive steps to reduce the risk of fines, suspension, or licence revocation. The following are some of the most common red flags that can prompt a compliance visit.
Red flags that increase enforcement risk
- Rapid growth in sponsored Skilled Worker visa applications
- Salary levels that appear inconsistent with market rates
- Discrepancies between PAYE and sponsorship data
- Anonymous tip-offs from former employees
- Previous civil penalties
- High turnover among sponsored workers
- Sector-based investigations (care, construction, hospitality)
- Failure to update key personnel on SMS
- Sponsored workers failing to attend work shortly after arrival
The Home Office increasingly uses data-sharing between government departments. Inconsistencies between immigration records, HMRC data and Companies House filings may trigger scrutiny.
Enforcement trends: increased scrutiny on sponsors
Compliance activity has intensified since 2025, and with the UK government taking an even stricter approach to foreign workers in 2026 as part of a broader plan to reduce record net migration, tighten immigration controls, and limit the economy’s reliance on overseas labour, certain sectors are under closer scrutiny, including:
- Care providers
- Construction companies
- Hospitality businesses
- IT consultancies that recruit overseas talent
Recent trends show:
- Greater scrutiny of genuine vacancy requirements
- Increased data-matching between HMRC, immigration records, and Companies House
- More unannounced sponsor compliance visits
- Harsher penalties for repeated technical breaches
The Home Office’s enforcement model is now primarily intelligence-led rather than solely complaint-driven, meaning proactive compliance and risk management are essential for all sponsor licence holders.
What happens during a Home Office sponsor compliance visit?
A compliance officer may:
- Inspect HR systems
- Review right to work checks
- Audit sponsored worker personnel files
- Interview Authorising Officers and Level 1 users
- Interview sponsored migrant workers
- Check salary payments and PAYE alignment
- Assess the genuineness of vacancies
Visits may be:
- Pre-licence (before approval)
- Post-licence (after approval)
- Announced
- Short-notice
- Unannounced
There is no “safe period” after licence approval.
What must a sponsor report to the Home Office?
Sponsors must report certain changes to the Home Office via the Sponsor Management System (SMS) within strict deadlines (usually 10 working days). Accurate and timely reporting is essential to demonstrate compliance and avoid sanctions.
Reporting falls into two main categories:
Worker-related changes:
- A sponsored worker does not start work on their first day
- Absence without permission for 10 consecutive working days
- Resignation or dismissal
- Stopping sponsorship
- Significant salary, role, or work location changes
Organisational changes:
- Change of company address
- Change in ownership
- Mergers and acquisitions
- TUPE transfers
- Changes in key personnel
Failure to meet reporting duties is a common cause of licence suspension, downgrade, or revocation. Ensuring records are updated promptly in SMS and that all HR staff are aware of their responsibilities is crucial for ongoing compliance.
What happens if sponsor licence responsibilities are not met?
Sponsor licence fines for first compliance breach
Failure to conduct proper right to work checks is one of the most common compliance issues identified by the Home Office. For a first breach, sponsors can face a civil penalty of up to £60,000 per illegal worker (subject to current guidance), which can have a significant financial and reputational impact on the business.
The Home Office will consider whether the breach was due to administrative oversight or systemic failings, and whether the sponsor took immediate steps to remedy the issue. Mitigation may be applied if:
- There was partial compliance, meaning some checks were completed correctly, while others were missing or incomplete
- The sponsor cooperates fully during the Home Office investigation, providing clear documentation and explanations
- Internal systems and processes are quickly improved to prevent future errors
For example, if a company accidentally failed to retain dated copies of a right to work check for a single employee, but all other records were correct and the issue was remedied immediately, the Home Office may reduce the penalty.
Even for a first breach, taking proactive steps to demonstrate compliance and rectify errors is crucial.
Sponsor licence fines for repeated compliance breaches
Repeated non-compliance suggests systemic failure.
This can result in:
- Maximum civil penalties
- Sponsor licence suspension
- Sponsor licence revocation
- Potential criminal investigation
Sponsor licence suspension: what UK employers need to know
The Home Office may suspend a sponsor licence if breaches are serious or repeated. During suspension:
- The sponsor cannot assign new Certificates of Sponsorship (CoS)
- Current sponsored workers may continue under their visas, but restrictions on new hires can disrupt business operations
- Suspension is often used as a temporary measure while the Home Office assesses compliance improvements
Suspension periods vary but typically last until deficiencies are remedied and the Home Office is satisfied with corrective actions.
A-rated vs B-rated sponsor licence explained for UK employers
The Home Office assigns ratings to sponsor licences to show whether an organisation is meeting its sponsorship duties. These ratings indicate how compliant a sponsor is with the immigration rules and determine whether the business can continue sponsoring workers.
Organisations should aim to maintain an A-rating, as this allows them to fully use the sponsor licence system.
A-rated sponsor licence
An A-rated sponsor licence confirms that the Home Office considers the organisation compliant with its sponsor duties. This is the standard rating given when a licence is first granted.
Sponsors with an A-rating can:
- Assign Certificates of Sponsorship (CoS) to skilled workers
- Recruit international employees under the relevant visa routes
- Demonstrate to the Home Office that they are meeting their ongoing compliance obligations
To maintain an A-rating, sponsors must consistently follow the required duties, including:
- Conducting proper right to work checks
- Keeping accurate employee records
- Reporting relevant changes through the sponsor management system (SMS)
- Cooperating with Home Office compliance visits
Regular internal checks and good HR processes help ensure that an organisation remains fully compliant and retains its A-rating.
B-rated sponsor licence
A B-rating is applied when the Home Office identifies compliance concerns but decides that immediate licence revocation is not necessary.
This rating indicates that the organisation must improve its compliance systems before being allowed to continue sponsoring workers normally.
If a sponsor is downgraded to a B-rating:
- The Home Office will issue a mandatory action plan outlining steps the sponsor must take to address compliance failures
- A Home Office action plan fee must be paid
- The sponsor cannot assign new Certificates of Sponsorship while the B-rating remains in place
- The business must implement improvements within strict deadlines
The action plan typically focuses on correcting issues such as poor record keeping, reporting failures, or inadequate right to work procedures.
Once the Home Office is satisfied that the sponsor has resolved the issues and implemented proper systems, the licence may be restored to an A-rating.
However, if the sponsor fails to follow the action plan or address the concerns, the Home Office will usually revoke the sponsor licence, which means the organisation can no longer sponsor migrant workers.
Sponsor licence revocation: consequences for UK employers
What happens if a sponsor licence is revoked?
If revoked:
- All sponsored workers face visa curtailment (usually 60 days)
- You cannot sponsor new workers
- A cooling-off period applies before reapplying
- Your recruitment model may collapse
Public naming
Businesses issued civil penalties may be published on the government’s non-compliance list, causing reputational damage.
Sponsor licence compliance checklist for employers
If you are preparing for a Home Office sponsor compliance inspection, use this structured checklist to ensure your records, reporting, and processes meet all requirements.
Record-keeping
- Right to work checks complete and dated?
- Passport copies clear and stored securely?
- Salary evidence matches Certificate of Sponsorship?
- Absence records maintained?
Reporting
- Worker changes reported within 10 working days?
- SMS regularly reviewed?
- Resignations reported promptly?
Organisational compliance
- Key personnel details up to date?
- Restructures reported?
- SOC codes accurate?
Training
- HR staff trained on sponsor duties?
- More than one SMS user trained?
How long does a sponsor licence suspension investigation take?
There is no fixed timeframe.
Typically:
- 20 working days to respond to suspension
- Several weeks or months for decision
- Longer where multiple workers are involved
During this period, new sponsorship is prohibited.
Can you appeal sponsor licence revocation?
There is no full statutory right of appeal.
However, you may:
- Challenge factual errors
- Request reconsideration
- Apply for judicial review
Early legal intervention during suspension is often decisive.
Can you apply for judicial review?
Yes, where the decision is:
- Irrational
- Procedurally unfair
- Legally flawed
Judicial review involves strict deadlines and specialist representation.
Can directors be personally liable?
In serious cases involving deliberate illegal working:
- Directors may face criminal liability
- Civil penalties may attach to responsible individuals
- Director disqualification is possible in extreme cases
Most compliance failures are corporate, but deliberate misconduct carries personal risk.
When UK employers should consider a mock sponsor licence compliance audit
You should seek urgent review if:
- You have received a suspension letter
- You rely heavily on sponsored workers
- You operate in a high-risk sector
- You expanded rapidly
- You recently changed HR staff
- You are unsure whether your systems would withstand inspection
A proactive mock sponsor licence audit UK employers trust can identify weaknesses before enforcement action begins.
Benefits of a mock sponsor licence audit by Mulgrave Law
Our immigration lawyers conduct structured mock audits designed to mirror a real Home Office inspection.
During your audit, we will:
- Verify information submitted in your sponsor licence application
- Review document management systems
- Audit sponsored worker personnel files
- Conduct mock interviews with key personnel
- Speak with sponsored workers about visa conditions
- Check wider workforce compliance
A structured framework tailored to your organisation
We:
- Design an audit framework specific to your sector
- Identify high – risk areas
- Conduct detailed interviews
- Categorise breaches by severity
- Provide a clear, prioritised action plan
Unlike generic compliance packages, we focus on real enforcement risk not theoretical compliance.
Protecting your sponsor licence
Your sponsor licence under the Skilled Worker route is a strategic asset. With increased enforcement and intelligence-led inspections, compliance must be proactive. If you are unsure whether your organisation would pass a Home Office sponsor compliance visit, a structured mock audit provides clarity, protection and peace of mind. Mulgrave Law’s business immigration team helps sponsors move from reactive to prepared ensuring that if UKVI visits, you are compliant, confident and protected.
If you would like assistance with a sponsor compliance audit or urgent advice regarding suspension or revocation or are a looking for to hire foreign talent for your business and need help with your sponsor licence, contact Mulgrave Law today, we take care of everything.
Book your consultation:
Fill out our online contact form,
Call us on 02072537248, or
Email us at info@mulgravelaw.co.uk
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