A mock sponsor licence audit is a review of your organisation against the same areas a UK Visas and Immigration (UKVI) compliance officer examines during a visit. Advisers check HR files, reporting through the Sponsor Management System (SMS) and how prepared your key personnel are, then give you a report in which every finding is ranked by risk. You find the weak spots before the Home Office does.
What a mock sponsor licence audit is
A mock audit (also called a mock compliance audit or sponsor licence health check) is a voluntary internal review that recreates a Home Office compliance visit. It has nothing to do with the authorities and carries no sanctions: only the employer sees the results. The aim is to answer one simple question: if a compliance officer arrived tomorrow, could the business prove with documents that it meets every sponsor duty?
An employer holding a sponsor licence must do more than pay the salary stated on the Certificate of Sponsorship (CoS). It must also keep records, report changes on time and carry out right to work checks. These requirements are set out in the sponsor guidance Part 3: sponsor duties and compliance, which the Home Office updates regularly. The current version, 08/26, was published at the end of August 2026.
A mock audit has three components:
- A simulated visit. The reviewer acts like a UKVI officer: asks for documents without notice, questions key personnel and, where appropriate, speaks to sponsored workers.
- A checklist review. Every requirement of the sponsor guidance and Appendix D is compared with what actually happens in the business.
- A prioritised report. Findings are split into critical, significant and advisory, each with a specific action and deadline.
Why an audit matters more in 2026
In 2026 the Home Office updated its guidance on sponsor duties three times: in March, May and August. The changes affected both the wording of existing requirements and the duties themselves. Businesses that set up their processes a few years ago and have not reviewed them since may be working to outdated rules without realising it.
Key points that now attract attention during compliance checks:
- Whether the role is an “eligible role”. A sponsor must not assign a CoS for a role that does not meet the criteria for the route. If a worker is actually doing a job that does not match the occupation code or job description on the CoS, the guidance treats this as grounds for mandatory licence revocation.
- Telling workers about their employment rights. Sponsors must comply with employment law, including making sure workers are aware of their rights. The August 2026 version of Appendix D lists the worker rights information given to the employee among the documents to keep.
- Right to work checks. These must be carried out for every sponsored worker before employment starts. From 1 October 2026 the duty also covers organisations that engage people under a worker’s contract, use individual sub-contractors or operate an online matching service.
This ability to prove compliance is exactly what a mock audit tests. It turns the general requirements of the guidance into a concrete list of documents and actions, showing where the business has evidence and where it relies on an informal arrangement or a habit.
Who needs a mock audit
Any sponsor can benefit from a review, but in some situations the risk is higher and an audit is worth carrying out as soon as possible. Businesses that most often request a mock audit include:
- employers that have recently received a licence and are setting up record-keeping and reporting for the first time;
- businesses hiring on the Skilled Worker visa in sectors under close scrutiny, such as care, restaurants and hospitality;
- UK branches of overseas companies sponsoring staff through Global Business Mobility routes, including the UK Expansion Worker visa;
- organisations where the Authorising Officer, Key Contact or Level 1 User has changed;
- businesses that have been through a restructure, merger, change of ownership or office move;
- sponsors that have received a letter from UKVI or notice of an upcoming compliance check.
Businesses preparing to apply for a licence form a separate group. The Home Office can carry out a check before deciding an application, so a readiness audit of HR systems helps the business get through this stage without unnecessary questions.
Benefits of a mock sponsor licence audit with Imperial & Legal
- Review of every sponsored worker’s HR file against Appendix D
- Comparison of workers’ actual duties with their CoS descriptions
- Analysis of SMS reports for the whole period of the licence
- Preparation of the Authorising Officer and Key Contact for interview
- Assessment of right to work check procedures for all employees
- Prioritised report with deadlines and owners for each fix
- Support with fixing breaches and a follow-up review
Even when a business is confident in its processes, an outside view often finds things that have long stopped being noticed internally. To understand what questions an officer will ask, it helps to know how a real visit works.
What the Home Office checks during a visit
The Home Office can carry out compliance checks at any time: before deciding a licence application or after the licence has been granted. A visit may be announced or unannounced. The employer must co-operate with officers and give them full access to its premises.
During a visit, officers may verify the information given in the licence application, speak to sponsored workers and inspect records and systems. In practice, the check covers several areas.
| Area | What the officer looks at | Typical question |
|---|---|---|
| Key personnel | Who is the Authorising Officer, Key Contact and Level 1 User, and whether they know their duties | “Who is responsible for SMS reporting?” |
| HR files | Whether each sponsored worker’s file holds the documents listed in Appendix D | “Show me the record of the right to work check” |
| Role and duties | Whether the actual job matches the occupation code and CoS description | “Describe a typical working day” |
| Salary | Payslips and transfers to the worker’s bank account | “Have you been paid less than your contract states?” |
| Reporting | SMS reports on changes to workers’ circumstances and to the business | “When did you report the change of work location?” |
| Absence records | Records of leave and absences, and workers’ contact details | “How do you record absences from work?” |
A mock audit follows the same logic: the same areas, the same questions and the same interview format. The only difference is that the result stays within the business and becomes an action plan rather than grounds for sanctions.
Sponsor duties: what needs to be in order
Sponsor duties fall into four groups: keeping records, reporting changes, complying with immigration and employment law, and co-operating with the Home Office. The GOV.UK page “Your responsibilities” gives the overall picture, and the detail is in the sponsor guidance.
Reporting deadlines are one of the most common sources of breaches. Changes to a sponsored worker’s circumstances, such as a salary reduction, a change of work location or more than 10 consecutive working days of absence without permission, must be reported through the SMS within 10 working days. Changes to the business itself, including key personnel changes, a merger or a change of ownership, must be reported within 20 working days.
Sponsor requirements that a compliance officer checks first
- Right to work check for every worker before employment starts
- Documents kept under Appendix D for each sponsored worker
- SMS reports on changes to a worker’s circumstances within 10 working days
- Reports on changes to the business within 20 working days
- Actual work matching the occupation code and CoS description
- Salary paid at no less than the level stated on the CoS
- Up-to-date contact details and absence records for workers
Documents can be kept on paper or electronically. They must be held for the whole period of sponsorship and then until the earlier of two events: one year after sponsorship ends, or a compliance officer examining and approving them. The full list is in Appendix D.
How a mock audit works: 5 stages
A mock audit is designed to take up as little of management’s and staff’s time as possible while still giving a complete picture. The length of each stage depends on the number of sponsored workers and the state of the documents, so the timeframes below are indicative.
Initial meeting and document request
Review of HR files against Appendix D
Simulated visit and staff interviews
Prioritised report and results review
Fixing breaches and a follow-up review
The order of stages can be adapted. For example, if a Home Office visit has already been scheduled, the simulated visit and preparation of key personnel come first, with the detailed file review running in parallel.
What the prioritised report includes
The report is the main outcome of a mock audit. It needs to be clear not only to a lawyer but also to a director and to the HR specialist who will fix the findings. Each finding is therefore described in the same format: what was found, which requirement it breaches, what the risk is and what needs to be done.
| Level | What it means | Examples | Deadline for fixing |
|---|---|---|---|
| Critical | The breach could lead to licence suspension or revocation | No right to work check; actual work does not match the CoS description | Immediately |
| Significant | The breach could lead to a downgrade to a B-rating | Missed SMS reports; incomplete HR files | Within a few weeks |
| Advisory | No direct breach, but the process is vulnerable | No internal procedure; only one person knows how processes work | At the next scheduled process review |
Alongside the table of findings, a report usually includes a short management summary, a list of the files reviewed and recommendations on internal processes: who tracks visa expiry dates and how, how absences are recorded and who is responsible for SMS reports. This turns a one-off review into a system that keeps working after the audit.
Common breaches a mock audit uncovers
Most problems sponsors face are not deliberate. They arise because duties are spread across different people and nobody sees the whole picture. The breaches found most often include:
- Missed reporting deadlines. A worker moved to another office, changed working pattern or had a salary reduction, but the SMS report was never sent.
- Incomplete right to work checks. There is no copy of the evidence, the date of the check is missing or the check was done after the worker started.
- A gap between the CoS and the actual job. The worker was hired for one role but over time has taken on different duties.
- No absence records. Leave and absences are not recorded systematically, so the business cannot show it monitors attendance.
- Out-of-date key personnel. The Authorising Officer left long ago but is still listed on the SMS.
- No evidence of worker rights information. Workers were told about their rights verbally, but there is no written record.
Each of these breaches is easy to fix if the business knows about it in advance. The problem arises when it is found by an officer rather than by an internal audit.
End-to-end mock audit
Check your licence before the Home Office does
Simulated UKVI visit
Staff interviews and document requests without notice
Key personnel briefing
Preparing the Authorising Officer and Key Contact
HR file review
Each sponsored worker’s file checked against Appendix D
Prioritised report
Three risk levels with actions and deadlines for each
To judge whether an audit is worthwhile for a particular business, it helps to compare it with the costs that arise when the Home Office finds a breach.
Audit costs and the price of breaches
The cost of a mock audit depends on the number of sponsored workers, the number of sites and whether help with fixing breaches is needed. It is calculated individually after an initial consultation. For comparison, the table below shows the official fees and penalties an employer may face in connection with a licence and possible breaches. The amounts come from the Home Office fees table and GOV.UK pages.
| Fee or sanction | Amount | When it applies |
|---|---|---|
| Sponsor licence application | £611 (small or charitable sponsor), £1,682 (medium or large sponsor) | When applying, including reapplying after revocation |
| Certificate of Sponsorship (Skilled Worker and similar routes) | £525 | For each worker hired |
| Immigration Skills Charge | £480 / £1,320 for the first 12 months, then £240 / £660 for each further 6 months | For each sponsored worker |
| Sponsorship action plan | £1,579 | When the licence is downgraded to a B-rating |
| Civil penalty for illegal working | Up to £60,000 per worker | If a worker has no right to work |
Direct costs are only part of the picture. With a B-rating, a business cannot sponsor new workers until it regains an A-rating, and if the licence is revoked it cannot sponsor workers for at least 12 months. Immigration Skills Charge rates are set out on GOV.UK. For a business that relies on overseas specialists, this often means hiring stops and growth plans have to be revisited.
Mock audit or self-assessment: which to choose
Some businesses audit themselves using publicly available checklists. This is better than nothing, but self-assessment has limits: it is carried out by the same people who run the processes, and they tend to overlook their own gaps. An internal check also rarely includes interview practice, and interviews are where key personnel most often struggle.
| Criterion | Self-assessment | Mock audit with advisers |
|---|---|---|
| Outside view | No, the same staff carry it out | Yes, external advisers carry it out |
| Up-to-date requirements | Depends on whether the business tracks updates | Checked against the current guidance |
| Interview practice | Usually not included | Interviews with key personnel and workers |
| Prioritisation | Often missing | Three risk levels with deadlines |
| Help with fixes | No | Support and a follow-up review |
A sensible approach is to combine both: carry out a full mock audit with external advisers once a year and, between audits, regularly check reporting and HR files internally using the checklist that remains after the review.
What happens if the Home Office finds breaches
The consequences depend on how serious the breach is. For relatively minor breaches, the licence is downgraded from an A-rating to a B-rating. The business then cannot sponsor new workers, although it can still extend visas for existing workers. To regain an A-rating, it must follow an action plan that lasts 3 months, and the fee must be paid within 10 working days of being notified or the licence will be revoked. Details are on the GOV.UK page “Your licence rating”. A business can be given a B-rating no more than twice in any 4-year period.
For more serious breaches, the licence is suspended. The business has 20 working days from the date of the written notification to respond and provide evidence. If the response does not satisfy the Home Office, the licence is revoked. A new application can then be made no sooner than 12 months later, or 24 months if the licence has been revoked more than once. Sponsored workers who do not find a new sponsor will have their permission cancelled.
Finally, employing someone who does not have the right to work in the UK can lead to a civil penalty of up to £60,000 for each such worker, as stated on the page “Penalties for employing illegal workers”. A mock audit cannot guarantee that no issues will ever arise, but it allows the most common grounds for sanctions to be dealt with in advance.
Once the decision to carry out a review has been made, preparation starts with documents. The more complete they are in advance, the faster and more accurate the audit will be.
Documents to prepare for the audit
The list depends on the visa routes and the size of the business, but the core set for most sponsors looks like this:
- SMS access or an export of reports and assigned CoS;
- a list of sponsored workers with job titles, occupation codes and visa expiry dates;
- right to work check evidence for each worker, including eVisa records;
- employment contracts and job descriptions;
- payslips and evidence of salary payments;
- records of leave and absences;
- recruitment documents: job adverts and interview notes;
- evidence that workers received information about their employment rights;
- details of the licence’s key personnel and internal sponsorship procedures.
If an external accountant handles part of the paperwork, it is worth getting payroll records from them in advance. Specialists in accounting services can help bring payroll in line with the details on each CoS.
Examples from practice
The situations in which an audit is most useful tend to repeat. Here are a few typical scenarios.
A restaurant with several chefs on Skilled Worker visas. Over a year, two workers moved to another site in the chain, but no SMS reports were sent. The audit picked up the discrepancy, the business submitted the reports and introduced a rule that any transfer is agreed with the person responsible for the licence.
A care home. HR files were kept in different systems, and some right to work check records existed only on paper in another building. After the audit, the documents were brought together in a single electronic register with reminders for visa expiry dates.
The UK branch of an overseas IT company. The Authorising Officer had returned to head office abroad but was still listed on the SMS. Key personnel were updated, and new staff were prepared for interview during the simulated visit.
Real Imperial & Legal client stories show that such problems can be resolved even when a Home Office check has already led to a suspended licence.
Client stories on sponsor licences
Reinstating Sponsorship Licence after Unexpected Home Office Visit
It has been nearly four years since Company A applied for and received a sponsorship licence for hiring foreign specialists in the UK....
Reinstating Suspended Sponsor Licence after Unjustified Accusations
Travel Agency C’s main clients are Chinese tourists. Because of that, all employees need to have knowledge of Chinese traditions and culture and speak...
Obtaining a UK Sponsorship Licence for a Care Home
It started with an unusual telephone call where we were offered cooperation. A caller could not explain properly how our companies could help each other, but in the end, we established what was...
One of these clients, the owner of a care home chain, explained why the business needed professional help with its sponsor licence.
Our priority is to provide the best service to elderly clients from all over the world. We want our patients to feel at home, so we are looking to employ foreign specialists. It turned out that it was difficult to obtain a UK sponsorship licence. We got in touch with Imperial & Legal who sorted it for us.
Obtaining a licence is only the beginning. The business then has to meet its sponsor duties for years, and this is where regular audits help prevent problems.
How to keep your sponsor licence safe
A sponsor licence gives a business access to overseas talent, but it needs constant attention. The Home Office can carry out a check at any time, and the requirements change several times a year. A mock audit lets a business see itself through a compliance officer’s eyes and deal with weak spots before they become grounds for sanctions.
Key takeaways
- A Home Office check may be unannounced and can happen before or after a licence is granted.
- Officers assess documents, so it matters not only to follow the rules but to be able to prove it.
- The most common breaches are missed SMS reports, incomplete right to work checks and mismatches with the CoS.
- A downgrade stops new hiring, and revocation removes the licence for at least 12 months.
- An annual mock audit plus regular internal checks is the most reliable way to stay compliant.
This page is for general information and is not individual legal advice. Sponsor requirements depend on the circumstances of each business and may change, so decisions should be made after consulting a qualified adviser.
