How Can Employers Prepare for a Mock Sponsor Licence Audit to Prevent Revocation?

Key Points

• Sponsor licence compliance is now a live governance risk, not a one-off HR task.

  
  

• Home Office revocations have more than doubled in recent published periods.

  
  

• UKVI can conduct announced, unannounced, remote or on-site compliance checks.

  
  

• Most audit failures arise from record gaps, salary issues, role drift or late SMS reporting.

  
  

• Sponsored worker changes must usually be reported within 10 working days.

  
  

• A mock sponsor licence audit helps employers find and fix compliance risks before UKVI intervenes.

  
  

What is a mock sponsor licence audit?

A mock sponsor licence audit is an internal compliance review designed to simulate the type of assessment UK Visas and Immigration may carry out during a sponsor compliance check.

The purpose is to review whether the business can demonstrate that it has been meeting its sponsor duties. This includes right to work checks, sponsored worker records, salary compliance, role accuracy, absence monitoring, reporting deadlines, and the management of key personnel on the Sponsor Management System.

A mock audit is not simply a document tidy-up exercise. It should test whether the company’s HR systems, payroll records, line management processes and SMS reporting records all tell the same story.

For employers who rely on sponsored workers, this matters because sponsor licence revocation can immediately disrupt recruitment, existing workers, business continuity and future hiring strategy.

Why has sponsor licence audit risk increased?

Sponsor licence compliance risk has increased because the Home Office is taking a stricter, more data-led approach to enforcement.

Recent Home Office data shows a significant increase in licence revocations. Between July 2024 and June 2025, 1,948 sponsor licences were revoked, more than double the previous 12-month figure. The Home Office has also highlighted improved data and intelligence sharing across government agencies such as the HM Revenue and Customs and law enforcement as a reason more employers are being identified for rule breaches.

This means employers should not assume that compliance concerns will only arise during a physical visit. UKVI may identify concerns through payroll data, Sponsor Management System records, Companies House information, right to work data, worker reports, previous applications or inconsistencies across government systems.

A mock audit helps employers move from reactive compliance to active control. Instead of waiting for the Home Office to find a problem, the business identifies and resolves gaps internally.

What does UKVI check during a sponsor licence audit?

UKVI may check whether the sponsor still meets the requirements of the licence and whether its HR systems are capable of meeting sponsor duties.

A compliance officer may assess whether:

• The business has a genuine operating or trading presence.

• Sponsored workers are doing genuine eligible roles.

• The roles match the occupation codes and job descriptions on the Certificates of Sponsorship.

• Sponsored workers are being paid correctly.

• Right to work checks were completed and retained.

• Absences, salary changes, work location changes and role changes were reported on time.

• The organisation has suitable HR systems to monitor sponsored workers.

• Key personnel are suitable, available and managing the licence properly.

• The company can produce required records quickly.

  
  

The most important point is consistency. The Certificate of Sponsorship, employment contract, payslips, HR system, manager description and worker interview answers should all align.

How should employers prepare personnel files for a mock sponsor licence audit?

Employers should begin by reviewing sponsored worker personnel files.

For larger sponsored populations, a sensible starting point is to test a sample of files, such as 10% of sponsored workers across different teams, locations, job types and visa dates. For small sponsors with only a few sponsored workers, it is better to review every sponsored worker file.

Each file should be checked for completeness, accuracy and consistency.

A strong sponsored worker file should include:

• A right to work check completed before employment started.

• A copy or record of the worker’s online right to work check.

• The worker’s current immigration status evidence.

• The assigned Certificate of Sponsorship details.

• The signed employment contract.

• A job description matching the CoS and SOC code.

• Salary records, including payslips and payroll reports.

• Working hours records where relevant.

• Absence records.

• Current residential address, phone number and email address.

• A comprehensive history of a worker’s contact details, including past changes. 

• Evidence of how the worker was recruited.

• Evidence of any required qualification or professional registration.

• Evidence that the worker has been given information about their UK employment rights.

  
  

The file should not simply contain documents. It should show a clear compliance paper trail: who the worker is, why the role was eligible, what they are paid, where they work, what they do, and how the sponsor monitors them.

What is role drift and why does it matter?

Role drift happens when a sponsored worker’s actual duties gradually move away from the role described on their Certificate of Sponsorship.

This can happen naturally in growing businesses. A worker may take on more senior duties, move into a different team, start managing people, cover another role, or become responsible for a new area of the business. Internally, this may look like progression. From a sponsor compliance perspective, it may be a reportable change or even require a new application.

During a mock audit, employers should compare three things:

• The job description used for sponsorship.

• The SOC code and role description on the CoS.

• The worker’s actual day-to-day duties.

  
  

The best way to test this is to interview the sponsored worker and their line manager separately. Ask each person to describe the role in practical terms. If the answers no longer match the sponsored role, the employer should review whether an SMS report, sponsor note, new CoS or change of employment application is required.

Role drift is especially risky where the worker has moved into a different occupation code. In this case, a simple SMS report would not suffice as the change of circumstances would be considered too major. In that case, the worker may need a new Certificate of Sponsorship and a successful change of employment application before starting the new role.

How should employers test salary and payroll compliance?

Salary compliance should be tested against the Certificate of Sponsorship, the Skilled Worker salary rules and the worker’s actual payroll records.

Employers should not only check annual salaries. For Skilled Worker sponsorship, salary compliance can also depend on pay periods, working hours and whether pay has dropped below the level stated on the CoS.

During the mock audit, HR and payroll should review:

• The salary stated on the CoS.

• The salary stated in the employment contract.

• The worker’s actual gross pay.

• The worker’s working hours.

• Any unpaid leave, reduced pay or salary sacrifice arrangements.

• Any deductions or repayments connected to immigration costs.

• Whether the salary still meets the applicable threshold and going rate.

• At least the last three months of payslips should be checked, but a stronger mock audit should review 12 months of payroll history where possible.

  
  

Employers should pay particular attention to workers close to the minimum salary threshold. A small payroll error, reduction in hours, unpaid leave period or salary deduction can create a sponsor compliance issue.

Another point of scrutiny would be pay periods. This is especially important for employers that remunerate their sponsored workers visa hourly rate. Where the worker is paid at a frequency of monthly or less, the salary paid to the worker over any 3-month period must be at least equal to a quarter of the required annual salary.

What is the 10-working-day reporting rule?

Many sponsored worker changes must be reported through the Sponsor Management System within 10 working days.

This includes key worker changes such as:

• The worker does not start the sponsored role on time.

• The worker is absent without permission for more than 10 consecutive working days.

• The worker’s salary is reduced from the level stated on the CoS.

• The worker’s job title, core duties or role changes significantly.

• The worker’s normal work location changes.

• The employer stops sponsoring the worker.

• The worker resigns, is dismissed, is made redundant or leaves earlier than expected.

  
  

The danger for employers is that these changes often begin with line managers, not the immigration or HR team. A manager may approve a location change, role expansion or working pattern update without realising it creates an SMS reporting obligation.

A mock audit should therefore test not only whether reports were submitted, but whether managers know when to escalate changes.

How should employers pressure-test absence tracking?

Absence tracking should be tested by comparing HR absence records with SMS reporting records.

The mock audit should review at least the previous 12 months of absence data for all sponsored workers, including sickness absence, unpaid leave, authorised leave, unauthorised absence, extended travel and no-show periods.

The key questions are:

Was the absence authorised or unauthorised?

Did the absence last more than 10 consecutive working days without permission?

Was the worker absent without pay or on reduced pay for more than four weeks in a calendar year?

Was the absence reported through SMS where required?

Did payroll reflect the absence correctly?

Was the worker’s salary still compliant?

The weakness is rarely the absence itself. The real risk is usually the reporting chain. If the line manager records an absence in one system but HR compliance never receives the information, the sponsor can miss the reporting deadline.

A strong mock audit should therefore test the escalation process, not just the absence spreadsheet.