A hospitality group in Birmingham hired a graduate from a London university last spring. She had a Graduate visa, which permits work without sponsorship. Six months later, the visa expired. Nobody noticed. She kept working. Three weeks after expiry, a Home Office compliance visit found her on shift with no valid right to work. The employer received a £45,000 civil penalty — not because they failed to check at the point of hire, but because they failed to understand what her visa actually permitted and when it ran out.
This is what happens when employers treat immigration status as a binary question — "can they work or not?" — rather than engaging with the specifics. The UK visa system is not a single gate. It is a set of categories, each with different permissions, restrictions, expiry timelines, and employer obligations. Getting the category wrong, or assuming one visa works like another, is a compliance failure waiting to happen.
Why employers need to understand visa categories
The Home Office employer's guide to right to work checks places a clear obligation on employers: you must check that every employee has the right to do the specific work you are offering them. Not just the right to be in the UK. Not just the right to work in general. The right to do that particular job, for that number of hours, in that sector.
This means a check that confirms "right to work: yes" is not enough. You need to understand the visa category, its conditions, its duration, and what happens when it expires. The penalty for getting this wrong — up to £45,000 for a first offence and £60,000 for repeat offences — applies regardless of whether the failure was deliberate or based on a misunderstanding.
With over 140,000 sponsor licence holders and a workforce increasingly composed of overseas nationals, the days of "most of our staff are British" are over for many UK employers. Here is what you need to know about the visa categories you are most likely to encounter.
Skilled Worker visa
The Skilled Worker visa is the backbone of the UK's employer-sponsored immigration system. It replaced the Tier 2 (General) visa in December 2020 and is the route used by most employers sponsoring overseas workers.
What it permits. Full-time work in the specific role, at the specific salary, for the specific employer named on the Certificate of Sponsorship (CoS). The worker can also take supplementary employment of up to 20 hours per week in the same occupation code, or any amount of voluntary work.
Restrictions. The worker cannot change employer without a new CoS being issued. They cannot work in a different role from the one specified without the sponsor reporting the change and, in some cases, issuing a new CoS. There are minimum salary thresholds that vary by occupation code — currently a general threshold of £38,700 per year or the going rate for the occupation, whichever is higher, with some exceptions.
Sponsorship requirements. The employer must hold a valid sponsor licence and issue a CoS for the role. The employer must report changes — including when the worker stops attending, changes role, or leaves — within strict deadlines, typically 10 working days.
Expiry and monitoring. Skilled Worker visas are issued for specific periods, typically up to five years. Employers must track expiry dates and ensure follow-up checks are conducted before the visa lapses. A worker whose visa has expired but who has a pending extension application may have the right to continue working under Section 3C leave — but verifying this requires careful documentation.
Graduate visa
The Graduate visa allows international students who have completed a UK degree to stay and work for two years (three years for PhD graduates) without sponsorship.
What it permits. Unrestricted work at any skill level, for any employer, in any sector. No sponsorship required. No minimum salary threshold.
Restrictions. The visa cannot be extended. Once the two or three-year period expires, the individual must switch to another visa category (typically Skilled Worker) or leave the UK.
Sponsorship requirements. None. The employer does not need a sponsor licence to hire someone on a Graduate visa.
Expiry and monitoring. This is where employers get caught. The Graduate visa has a hard expiry date with no extension. If you hire someone on a Graduate visa, you must record when it expires and conduct a follow-up right to work check before that date. If the employee has not secured a new visa by expiry, they must stop working. No exceptions.
Dependent visas
Partners and children of Skilled Worker visa holders (and some other categories) may receive dependent visas that permit work in the UK.
What it permits. Dependants of Skilled Worker visa holders generally have unrestricted work rights — they can work for any employer, in any role, with no sponsorship required.
Restrictions. The dependent's right to work is tied to the principal visa holder's immigration status. If the principal's visa is revoked or they leave the UK, the dependent's permission may also be affected.
Sponsorship requirements. None for the employer. But you must still verify the dependent's right to work through the standard check process — typically via an online share code.
Expiry and monitoring. The dependent's visa typically expires at the same time as the principal's. Track both dates. A dependent whose partner's employer fails to extend the CoS may find their own right to work disappearing.
Student visa
Student visas permit limited work alongside study. This is the category most likely to cause accidental non-compliance.
What it permits. During term time: up to 20 hours per week of work. During official vacation periods: full-time work. PhD students in the final stages of their thesis may work full-time.
Restrictions. The 20-hour term-time limit is strictly enforced. The hours are per week, not averaged over a period. Students cannot be self-employed. They cannot fill a permanent, full-time vacancy. Certain categories of student — those on short-term study visas or below degree level — may have no work rights at all.
Sponsorship requirements. None for the employer. But the employer must understand and respect the hour restrictions. Scheduling a student for 25 hours during term time is an offence for both the worker and the employer.
Expiry and monitoring. Student visas expire at the end of the course or shortly after. The work rights change during vacations and term time. Employers in sectors with high student employment — hospitality, retail, warehousing — need systems that track not just visa expiry but term dates and weekly hours.
Health and Care Worker visa
A variant of the Skilled Worker visa designed specifically for the health and social care sector. It has become the dominant route for overseas care recruitment.
What it permits. Work in eligible health and care roles for the sponsoring employer.
Restrictions. Same role-specific restrictions as the Skilled Worker visa. The worker must be employed in an occupation on the eligible occupations list for the Health and Care route. Salary thresholds are lower than the general Skilled Worker route — currently £23,200 per year or the going rate, whichever is higher.
Sponsorship requirements. The employer must hold a sponsor licence. The care sector accounts for roughly a third of all sponsor licence revocations — the compliance obligations are identical to the Skilled Worker route, but the operational challenges (high turnover, multiple sites, shift patterns) make compliance harder in practice.
Expiry and monitoring. Same as Skilled Worker. The critical risk in care is volume — a care provider sponsoring 50 workers has 50 expiry dates to track, 50 change-of-circumstance reporting obligations, and 50 individuals whose attendance and role must be monitored continuously.
Seasonal Worker visa
The Seasonal Worker visa brings approximately 45,000 workers annually to the UK for agriculture and poultry processing.
What it permits. Work in horticulture (farm work) for up to six months in any 12-month period, or in poultry processing for up to two months. Workers must be employed by or work for a licensed sponsor operator.
Restrictions. The worker can only perform agricultural or poultry work. They cannot switch to other sectors. They cannot extend beyond the six-month limit. They must leave the UK when the visa expires. Work is limited to the specific activities covered by the scheme operator's licence.
Sponsorship requirements. Only approved scheme operators can sponsor Seasonal Workers. End hirers (individual farms) typically do not hold the licence directly — the operator does. This creates a layered compliance structure similar to agency worker arrangements.
Expiry and monitoring. Short duration means fast turnover. The Gangmasters and Labour Abuse Authority (GLAA), now operating within the Fair Work Agency framework, actively monitors the scheme.
Youth Mobility Scheme
The Youth Mobility Scheme (YMS) allows young people (18-30, or 18-35 for some nationalities) from participating countries to live and work in the UK for up to two years.
What it permits. Unrestricted work for any employer, in any role, at any skill level. No sponsorship required.
Restrictions. Cannot be extended. Available only to nationals of participating countries (currently including Australia, Canada, Japan, New Zealand, South Korea, and others — the list has expanded). Cannot bring dependants.
Sponsorship requirements. None.
Expiry and monitoring. Hard two-year limit with no extension. The same expiry-tracking discipline applies as with the Graduate visa.
Global Talent visa
The Global Talent visa is for individuals who are recognised leaders or emerging leaders in academia, research, digital technology, or arts and culture.
What it permits. Unrestricted work, including self-employment. No sponsorship required. No minimum salary threshold.
Restrictions. Very few. The visa is designed for maximum flexibility. It can lead to settlement after three or five years depending on the endorsement.
Sponsorship requirements. None. The individual secures endorsement independently from a designated endorsing body.
Expiry and monitoring. Typically issued for up to five years. Standard follow-up check obligations apply.
The common thread: assumptions are the enemy
Across every visa category, the compliance failures follow the same pattern. Someone assumed the visa permitted something it did not. Someone assumed an expiry date was further away than it was. Someone assumed another party had checked. Someone assumed "right to work" was a yes-or-no answer.
It is not. Right to work is conditional, time-limited, role-specific, and changes over time. Treating it as a single checkbox at the point of hire creates the exact gap that enforcement is designed to find.
The employers who stay compliant are the ones who understand that right to work verification is not a one-time event. It is an ongoing obligation that requires knowing what each visa category permits, tracking when permissions expire, and maintaining audit trails that prove you did the work.
Building a visa-aware compliance process
The practical steps are straightforward, even if the execution requires discipline.
Train hiring managers on visa categories. Not immigration law — just enough to recognise the common categories, understand the restrictions, and know when to escalate. A line manager who knows that a Student visa has a 20-hour term-time limit will prevent more compliance failures than any policy document.
Record the visa category, not just "right to work: confirmed." Your compliance records should capture the specific visa type, its conditions, and its expiry date. When an auditor asks "what visa was this person on when you hired them?", the answer should be immediate and documented.
Set expiry alerts with enough lead time. A follow-up check triggered the day before expiry is useless. Build in 90-day, 60-day, and 30-day alerts. This gives employees time to apply for extensions and gives you time to verify the outcome.
Use digital verification where available. The Home Office online checking service provides real-time verification for non-UK nationals with share codes. It confirms the visa category, work conditions, and expiry date in a single check. It is more reliable than interpreting visa stickers or BRP cards, and it creates an auditable digital record.
Certifyd's compliance portal automates visa category tracking, expiry monitoring, and follow-up check scheduling across your entire workforce — giving HR teams a single dashboard that surfaces what needs attention before it becomes an enforcement risk. If you are managing sponsored workers or a mixed-visa workforce, see how the portal works.