Sponsoring an Employee for a Work Visa: Step by Step

Sponsoring an employee for a work visa is a multi-stage legal process that requires employer action long before a candidate ever submits their own application. Done correctly, it opens access to a global talent pool that can transform your team; done poorly, it wastes tens of thousands of dollars or pounds and can expose your business to compliance sanctions. This guide walks you through every major step — from deciding whether sponsorship is the right move, through the filing process, to ongoing compliance duties after the visa is granted.

Why This Matters More in 2026

Tight domestic labour markets across the US and UK have pushed international hiring from a niche strategy to mainstream practice for employers of almost every size. At the same time, regulatory scrutiny of employer sponsors has intensified. In the United States, USCIS conducted a record number of Requests for Evidence (RFEs) on H-1B petitions in 2024 and 2025, with employer-employee relationship documentation under particular examination. In the United Kingdom, the Home Office conducted over 4,000 sponsor compliance visits in 2025, and hundreds of licences were suspended or revoked for record-keeping failures.

The stakes are high in both directions. Employers who invest in robust sponsorship processes gain a sustained competitive advantage in sectors where domestic skills are genuinely scarce — technology, healthcare, engineering, financial services. Employers who cut corners risk losing their sponsorship privileges entirely, which can strand their entire sponsored workforce.

This guide covers the two most significant routes for English-speaking employers: the US H-1B (and related) visa pathway and the UK Skilled Worker visa route. Where the steps diverge, we call that out clearly.

Not covered here in depth: Intracompany transferee routes (US L-1, UK Senior or Specialist Worker), treaty investor visas, or country-specific routes such as those described in our Germany Work Visa Routes for Employers: 2026 Guide. The principles of planning and compliance are broadly similar across all routes; the specifics differ considerably.

Step 1: Confirm the Role and Candidate Qualify

Before you spend a dollar on legal fees, answer three foundational questions.

1a. Does the role qualify?

Every sponsored visa route has an occupational eligibility test.

For a detailed breakdown by sector, see Which Roles Qualify for Visa Sponsorship: 2026 Guide.

1b. Does the candidate qualify?

The worker must meet the personal eligibility criteria: academic credentials (and where needed, a credential evaluation for overseas qualifications), professional experience, and any required licences or registrations. In the US, USCIS scrutinises the relationship between the candidate's degree field and the job duties. A software engineer with a degree in computer science is straightforward; a marketing manager with a degree in literature requires careful framing.

1c. Is your business eligible to sponsor?

In the UK, you cannot sponsor anyone until you hold a valid sponsor licence. In the US, any legitimate employer with a tax ID can file most petitions, but USCIS will assess whether the business is bona fide and whether a genuine employer-employee relationship will exist. Newly established businesses, staffing arrangements, and off-site placements all attract heightened scrutiny.

Step 2: Obtain or Verify Your Sponsorship Authority

United States

US employers do not need a licence to sponsor most employment-based visas. However, for H-1B petitions, the employer must:

1. Register for the H-1B lottery (cap-subject cases only) during the annual March registration window.
2. Obtain a Labor Condition Application (LCA) certified by the Department of Labor before filing the I-129 petition.
3. Establish and maintain a Public Access File containing the LCA, wage determination documentation, and supporting records.

For more detail on the full range of US work visa types and their employer requirements, see our H Visa Types Explained for US Employers (2026 Guide).

United Kingdom

UK employers must hold a Sponsor Licence issued by the Home Office before they can employ anyone on the Skilled Worker route. The application process involves:

• Demonstrating that your business is genuine and operating lawfully in the UK.
• Nominating an Authorising Officer and at least one Key Contact.
• Evidencing that your HR systems can meet sponsor duties.

Processing times vary; the standard service currently runs at around 8 weeks, though this has fluctuated. For an up-to-date view, see How Long Does a Sponsor Licence Application Take? 2026.

Once approved, you will be able to assign Certificates of Sponsorship (CoS) to workers and access the Sponsor Management System (SMS). You can read exactly What a Sponsor Licence Lets You Do Once Approved in our dedicated guide.

Step 3: Conduct Any Required Recruitment Testing

US: Prevailing Wage and Labour Market Test

Most employment-based visa categories do not require a formal labour market test at the petition stage, but the PERM labour certification (required for most EB-2 and EB-3 green card sponsorships) does. For H-1B, the employer must obtain a certified LCA confirming they will pay the prevailing wage for the occupational classification in the area of intended employment. This is filed with the Department of Labor and typically certified within 7 business days electronically.

UK: Genuine Vacancy and Resident Labour Market Test

The Resident Labour Market Test (RLMT) was formally abolished for most Skilled Worker cases, but the Home Office still expects that the vacancy is genuine and that the role is not artificially constructed to enable sponsorship. You must be able to demonstrate a real business need if audited.

Step 4: Prepare and File the Petition or Application

This is the most document-intensive phase. The exact bundle varies by visa type.

US H-1B Petition (Form I-129)

Illustrative example: Meridian Analytics, a 60-person data consultancy in Chicago, wants to sponsor Priya, a data scientist currently on an F-1 OPT extension. The cap-subject H-1B lottery selected Priya's registration in March 2026. The company now files:

• Form I-129 with H Classification Supplement
• Certified LCA (DOL-certified for the Chicago metropolitan area at the Level II prevailing wage)
• Degree and credential documentation for Priya, including a credential evaluation of her overseas bachelor's degree
• Employer evidence packet: company registration, tax returns, organisational chart, detailed job duties letter
• Support letter explaining why the role is a specialty occupation

Total filing fees in this illustrative scenario: approximately $7,200 — comprising the base filing fee ($460), ACWIA training fee ($1,500 for employers with 26+ employees), Fraud Prevention and Detection fee ($500), USCIS Asylum Programme fee ($600), and premium processing ($2,805 if elected), plus approximately $1,500 in attorney fees. Note: fees are subject to legislative change; verify current amounts on the USCIS website before filing.

For a broader view of your legal obligations as a US employer of foreign nationals, see How to Hire Foreign Workers Legally in the US (2026).

UK Skilled Worker — Assigning a CoS and Supporting the Visa Application

Illustrative example: Hartfield Engineering, a 30-person manufacturer in Birmingham, holds a Sponsor Licence. They want to sponsor Tomasz, a mechanical engineer currently in Poland. The process runs as follows:

1. HR checks Tomasz's role against the eligible occupations list — it qualifies at RQF Level 6.
2. HR assigns a Certificate of Sponsorship via the SMS. The CoS fee: £239.
3. The CoS reference number is sent to Tomasz.
4. Tomasz applies for his Skilled Worker visa from Poland, submitting the CoS reference, evidence of his qualifications, English language proof, and paying the visa application fee and Immigration Health Surcharge.
5. Home Office processing takes approximately 3 weeks (overseas application).
6. Tomasz arrives, and Hartfield records his arrival in the SMS within 10 working days.

Step 5: Prepare for the Employee's Arrival

Sponsorship does not end when the visa is granted. You now have a series of pre-arrival and arrival obligations.

• Right to Work check: In the UK, you must conduct a compliant right-to-work check before employment begins — for sponsored workers, this means checking the visa vignette or Biometric Residence Permit (BRP/eVisa). In the US, you must complete Form I-9 within three business days of the start date.
• Offer letter and employment contract: Ensure the contract reflects the role and salary as stated in the petition or CoS. Any material changes to duties or salary after sponsorship can require a new petition or CoS amendment. See International Employment Contracts: What to Include (2026) for a detailed guide.
• Onboarding for relocating employees: International hires often have practical needs that domestic hires do not — bank account setup, accommodation support, local registration. A thoughtful onboarding process reduces early attrition. See How to Onboard an Employee Relocating from Abroad (2026).

Step 6: Maintain Ongoing Compliance

This is the step most employers underestimate. Sponsoring a worker is not a one-time filing; it creates a continuing compliance relationship.

US Compliance Obligations

• Maintain the Public Access File for the duration of the H-1B employment and one year after.
• Pay the prevailing wage or the actual wage, whichever is higher, for the full period of employment including any non-productive time (with limited exceptions).
• File an amended petition if the employee moves to a new worksite not covered by the original LCA, or if there is a material change in duties or salary.
• Notify USCIS if employment ends.

UK Compliance Obligations

• Report certain events via the Sponsor Management System within 10 working days: the employee's first day, any absences of more than 10 consecutive working days without permission, changes to salary or role, and end of employment.
• Keep copies of immigration documents and contact details up to date.
• Co-operate with any Home Office compliance visit.
• Renew your sponsor licence before it expires (currently a 4-year cycle). See Sponsor Licence Renewal & Reporting Changes: 2026 Guide for the full renewal process.

Common Mistakes — and How to Avoid Them

1. Starting Too Late for Cap-Subject H-1B Cases

Mistake: An employer identifies a candidate in June and expects to get them working by September.

Reality: Cap-subject H-1B visas follow a fixed annual cycle. Lottery registration opens in March; selected petitions are filed between April and June; the earliest work start date is 1 October. Missing the March window means waiting a full year.

Solution: Build a 12-month hiring calendar for international candidates. If you identify talent in June, begin preparing for the following March lottery immediately. Explore cap-exempt employer options or alternative visa categories (O-1, TN for Canadian/Mexican nationals) as a bridge.

2. Misclassifying the Role

Mistake: A company tries to sponsor a generalist "project coordinator" under H-1B as a specialty occupation, but the job description does not credibly require a specialised degree.

Reality: USCIS increasingly scrutinises roles that sound generic. An RFE or denial wastes fees and damages the timeline.

Solution: Work with immigration counsel to draft job descriptions that honestly and specifically articulate the theoretical and practical application of specialised knowledge required. If the role genuinely does not qualify, consider whether a different visa category applies.

3. Failing to Conduct Right-to-Work Checks Correctly

Mistake: A UK employer conducts a right-to-work check on a sponsored worker's old passport and CoS confirmation email, but fails to use the Home Office online checking service, which is now required for workers with a digital immigration status (eVisa).

Reality: An incorrect check carries no statutory excuse for illegal working. The employer faces a civil penalty of up to £60,000 per illegal worker (2026 rate).

Solution: Train HR on the current checking process for each document type. For sponsored workers with eVisa status, always use the Home Office's online checking service and retain a timestamped screenshot.

4. Making Material Changes Without Filing an Amendment

Mistake: A sponsored software engineer is promoted to Engineering Lead with a new salary and changed responsibilities. The employer skips the amended petition because "it's just a promotion."

Reality: In the US, a material change to a sponsored worker's role, salary, or work location may require an amended I-129 petition. In the UK, a significant change to the role or salary may require assigning a new CoS. Proceeding without doing so places the worker out of status.

Solution: Establish an internal HR trigger: any change to a sponsored employee's title, salary above a defined threshold, duties, or work location must automatically go through an immigration review before taking effect.

5. Under-Budgeting for Total Sponsorship Costs

Mistake: An employer budgets $2,500 for an H-1B sponsorship, covering only the filing fees, and is blindsided by attorney fees, premium processing, and state-level compliance costs.

Reality: Total employer-paid costs for a single H-1B petition can run from $4,000 to $10,000 or more, depending on whether premium processing is elected, the size of the employer, and the complexity of the case. UK costs include the sponsor licence fee (£536 for small sponsors, £1,476 for medium/large), the CoS assignment fee (£239), the Immigration Skills Charge (up to £1,000 per year for medium/large sponsors), and often a legal fee on top.

Solution: Build a realistic per-hire cost model before extending offers contingent on sponsorship. Our guide to Staff Hiring Costs When Recruiting From Overseas (2026) covers this in full.

6. Ignoring Reporting Duties When an Employee Leaves

Mistake: A sponsored worker resigns. HR processes the departure normally and forgets to notify the relevant authority.

Reality: In the UK, failure to report the end of employment within 10 working days is a sponsor duty breach that can lead to a licence downgrade or revocation. In the US, notifying USCIS and formally withdrawing the petition is the employer's responsibility.

Solution: Embed immigration compliance into your offboarding checklist. Every departure of a sponsored worker should trigger an automatic task for the HR or legal team.

Building a Repeatable Sponsorship Process

The employers who handle international hiring most efficiently treat sponsorship as a system, not a series of one-off events.

Centralise your sponsorship records. Whether you use an HRIS, a shared drive, or dedicated immigration tracking software, every sponsored worker's file should include visa expiry dates, LCA/CoS details, I-9 or right-to-work records, and a calendar of renewal trigger dates.

Develop standard job description templates for your most commonly sponsored roles. Having pre-approved, legally reviewed templates means you can move faster when a new hire needs sponsorship.

Appoint an internal owner. In the UK, this is formally the Authorising Officer; in practice, it is often an HR manager or Head of People. That person should be the single point of contact for the immigration law firm and should receive ongoing compliance training.

Plan your sourcing around sponsorship timelines. If you know your H-1B cap-subject petitions must be filed in April, your sourcing, interviewing, and offer process for international candidates needs to begin no later than the prior October. Guides like Recruiting Software Engineers Internationally (2026 Guide) can help you structure that pipeline.

A Note on Costs and Charging

Under US law, certain H-1B fees may not be deducted from the worker's wages, including the base filing fee, ACWIA training fee, and attorney fees. Doing so can constitute a minimum wage violation. In the UK, employers are prohibited from passing the cost of the sponsor licence fee or certain other immigration costs to sponsored workers.

Always confirm current rules on fee-charging with an employment attorney before asking a worker to contribute to any sponsorship-related expense.

When to Involve a Licensed Immigration Attorney

The answer is: earlier than you think. An immigration attorney is not just for complex cases. Their value lies in:

• Structuring the petition to minimise the risk of an RFE or refusal.
• Advising on alternative visa strategies if the primary route is unavailable.
• Keeping your compliance programme current as rules change.
• Managing any audit, compliance visit, or enforcement action.

For decisions that turn on an individual's specific visa status — whether they can change employers, what happens to their status if a petition is denied — always refer the worker to their own immigration counsel as well. Your attorney represents the company's interests; the worker may need independent advice.

Summary: The Sponsorship Journey at a Glance

Sponsoring an employee for a work visa is genuinely complex, but it is a learnable, repeatable process. The employers who do it well invest in understanding the rules before they start, budget honestly, and treat compliance as a permanent operational function rather than an afterthought. With the right process in place, international hiring becomes one of the most powerful levers you have for building a team that can compete globally.