UK Immigration Skills Charge 2026: What Employers Pay to Sponsor a Worker

Last reviewed: 14 May 2026 | Chandraketu Tripathi, finance editor

The Immigration Skills Charge is one of the most consequential employer costs in UK sponsorship. Introduced in 2017 to encourage domestic workforce investment, the ISC is paid by UK sponsors at the time they assign a Certificate of Sponsorship to a worker on most Skilled Worker, Senior or Specialist Worker (under Global Business Mobility), and certain other sponsored routes. The charge is calculated per year of sponsorship: 1,000 pounds per year for medium and large sponsors, and 364 pounds per year for small and charitable sponsors. A 5-year CoS attracts the full 5 years of charge upfront. The exemptions are narrow but important: the Health and Care Worker route is exempt, certain PhD-level roles in specified Standard Occupational Classification (SOC) codes are exempt, and Senior or Specialist Worker leave of less than 3 years for specified nationalities under double-tax treaties is exempt. The charge cannot be passed to the worker; doing so is a sponsor duty breach. This page is the 2026 guide to the ISC: who pays, how much, when, the exemptions, the refund regime, and the practical considerations for sponsors.

What this means for UK visa applicants in 2026

The Immigration Skills Charge is structurally an employer cost, paid by the sponsor at CoS assignment. From the worker's perspective, the charge has two practical implications. First, the worker cannot be made to pay it; any attempt by an employer to pass the charge to the worker (through salary reduction, fee passthrough, or other mechanism) is a breach of sponsor duty and can affect the sponsor's licence. Second, the charge sits in the overall economic calculus of the sponsorship: an employer hiring a worker on a 5-year CoS at the medium-sponsor rate adds 5,000 pounds to the sponsorship cost over and above the salary, the National Insurance contribution, and the other employer-side costs.

From the sponsor's perspective, the ISC is a substantial cost that needs to be budgeted into the recruitment plan. A medium-sized firm sponsoring 10 Skilled Worker visas at 5-year CoS pays 50,000 pounds in ISC at CoS assignment. The charge is upfront and non-refundable for the period covered, with limited refund options where the worker leaves early.

The 2026 reform context: the ISC rates have been adjusted periodically; the 2026 rates (1,000 pounds per year medium/large; 364 pounds per year small/charitable) reflect the current published schedule. The exemption framework has been updated over the years to address specific policy priorities (the Health and Care Worker exemption to ease NHS and care-sector recruitment; the PhD-level exemption for research roles).

For the practical employer, the ISC is a fixed cost line that should be calculated at the CoS assignment stage and built into the cost-benefit analysis of international recruitment. For most professional Skilled Worker hires, the ISC adds a single-digit percentage to the total cost of sponsorship over the period.

How it works: the 2026 process

The Immigration Skills Charge is paid through the Sponsor Management System (SMS) at the time the sponsor assigns a Certificate of Sponsorship. The sequence is:

The sponsor opens the SMS, selects the relevant CoS allocation, and prepares to assign a CoS to a specific worker.

The SMS calculates the ISC based on: the route (Skilled Worker, Senior or Specialist Worker, etc.); the sponsor's size classification (small/charitable or medium/large); the period of the CoS in years.

The sponsor confirms the calculation and pays the ISC through the SMS payment process. Payment is by debit or credit card at the SMS interface.

Once paid, the CoS is assigned and the worker can use the CoS reference for their UK visa application.

The calculation method is straightforward: the ISC rate (1,000 pounds for medium/large sponsors; 364 pounds for small/charitable) is multiplied by the number of years of the CoS, rounded as set out in the published guidance.

Example calculations: a medium sponsor assigning a 3-year CoS pays 3,000 pounds (1,000 x 3). A small sponsor assigning a 5-year CoS pays 1,820 pounds (364 x 5). A medium sponsor assigning a CoS for 2 years 6 months pays the equivalent of 2,500 pounds (1,000 x 2.5; partial years are handled per the published guidance).

The payment is made upfront at CoS assignment. The full period of the CoS is charged at that time. Where the worker subsequently leaves early or where the CoS period is shortened, partial refunds apply under the published refund regime.

Sponsor size classification and the rates

The sponsor size classification determines the ISC rate.

Small or charitable sponsor: the rate is 364 pounds per year of sponsorship. A sponsor qualifies as small or charitable if it meets at least two of the three Companies Act 2006 small-company criteria (turnover not more than 10.2 million pounds; balance sheet total not more than 5.1 million pounds; not more than 50 employees) or is a charity registered with the Charity Commission.

Medium or large sponsor: the rate is 1,000 pounds per year of sponsorship. Any sponsor that does not qualify as small or charitable.

The size classification is self-assessed by the sponsor at CoS assignment based on the Companies Act criteria. The SMS records the classification and applies the relevant rate.

Where the sponsor's size changes (a growing small business becoming medium-sized), the classification updates at the next sponsor return or renewal. Existing CoS assignments are not retroactively recalculated; the rate applied at the time of CoS assignment remains.

The structural rationale for the small/charitable lower rate is to ease the impact on smaller employers and on charity-sector sponsors. The published policy framework rests on the principle that the burden of the ISC should be proportionate to the size and resources of the sponsor.

The 2026 reform context: the rates (1,000 / 364 pounds per year) have been stable for a period; previous adjustments are documented in the published Statement of Changes to the Immigration Rules. The rate structure is kept under review and may be adjusted in future fiscal events.

Exemptions from the Immigration Skills Charge

The exemptions are narrow but important.

The Health and Care Worker route. Workers on this route are exempt from the ISC. The route covers NHS and other health and care occupations, and the exemption reflects the policy intent to ease healthcare-sector international recruitment. The sponsor assigning a Health and Care Worker CoS does not pay the ISC.

PhD-level roles in specified SOC codes. The published list of exempt SOC codes covers research roles at PhD level (such as natural and social science researchers, higher education teaching professionals, others). The exemption applies where the role is at PhD level in the specified SOC codes; the sponsor confirms the exemption at CoS assignment.

Senior or Specialist Worker leave of less than 3 years for specified nationalities. Under bilateral double-tax treaties between the UK and certain countries, Senior or Specialist Worker leave of less than 3 years can be exempt from the ISC. India is the principal example: under the UK-India double-tax treaty, Indian nationals on Senior or Specialist Worker leave of less than 3 years are exempt. The exemption is administered at CoS assignment.

Switching to Senior or Specialist Worker leave from within a previous CoS. Where a sponsor extends a worker's Senior or Specialist Worker leave with continuity, the ISC for the extension period may be reduced or exempt under the published guidance.

Some specific other categories spelled out in the published guidance. The current authoritative list is on gov.uk; sponsors should verify the exemption position before assuming an exemption applies.

The exemption framework is not retroactive in most cases: a CoS assigned before an exemption was introduced does not get a retrospective refund of the ISC paid. The framework applies prospectively.

Refunds, the worker cost rule, and compliance

The refund regime applies where the worker leaves early or where the CoS period is shortened. The published refund framework:

Where the worker's leave ends before the CoS period (the worker resigns, is dismissed, or has leave curtailed for other reasons), the sponsor is entitled to a partial refund of the ISC for the unused period. The refund is calculated pro-rata based on the unused months.

Where the CoS is withdrawn before the visa is granted, the ISC is generally fully refunded.

Where the worker's leave is granted for a shorter period than the CoS (because the worker requested a shorter visa, or because UKVI granted a shorter period), the ISC is refunded for the difference.

Refunds are administered through the SMS. The sponsor applies for the refund following the trigger event (worker departure, CoS withdrawal, etc.) and the refund is processed by UKVI.

The worker cost rule is structurally important: the ISC cannot be passed to the worker. The published sponsor guidance makes this explicit. Any attempt to pass the charge to the worker (through salary reduction below the going rate, through fee passthrough, through deductions from salary, through repayment requirements if the worker leaves early) is a breach of sponsor duty.

The compliance consequences of breaching the worker cost rule include: B-rating downgrade following a compliance visit that identifies the breach; revocation of the licence in serious cases; financial penalties under separate frameworks.

The structural lesson for sponsors is that the ISC is an employer cost and must be treated as such in the recruitment economics. Sponsors who try to recover the ISC from the worker breach the framework and risk consequences.

Costs, timelines and what to expect

The cost picture for the ISC depends on the sponsor's size and the CoS period.

Small/charitable sponsor, 3-year CoS: 1,092 pounds (364 x 3).

Small/charitable sponsor, 5-year CoS: 1,820 pounds (364 x 5).

Medium/large sponsor, 3-year CoS: 3,000 pounds (1,000 x 3).

Medium/large sponsor, 5-year CoS: 5,000 pounds (1,000 x 5).

For a medium-sized sponsor with 10 Skilled Worker hires at 5-year CoS each, the cumulative ISC is 50,000 pounds. For a small sponsor with the same hiring pattern, the cumulative ISC is 18,200 pounds.

Timing: the ISC is paid upfront at CoS assignment. The full period is charged at that time. Payment is by debit or credit card through the SMS.

Refunds are administered through the SMS and processed by UKVI. The timeline for refund processing varies; published guidance and recent experience suggest several weeks to months.

The ISC is part of the wider economic cost of sponsorship. Other employer-side costs include: the salary at the relevant threshold; National Insurance contributions; the workplace pension contributions; the sponsor licence application fee and the periodic renewal; the internal HR and compliance costs; the relocation support for the worker. The total cost of sponsoring an international worker over a 5-year CoS is substantially more than the ISC alone.

Worked example: A medium sponsor calculating ISC for a Skilled Worker hire

Consider Westridge Logistics, a UK logistics firm with 120 employees and annual turnover of 25 million pounds. Westridge does not qualify as a small sponsor (it exceeds the small-company thresholds on at least two criteria). Westridge holds a sponsor licence and has identified an Operations Director hire based in Dubai for a 5-year CoS at a salary of 95,000 pounds.

Westridge's ISC calculation: medium/large sponsor rate of 1,000 pounds per year, 5-year CoS, ISC = 5,000 pounds. The ISC is paid at the time Westridge assigns the CoS to the worker through the SMS. Payment is by company credit card at the SMS interface.

Westridge's overall sponsorship cost over the 5-year period for this single hire: salary 95,000 pounds per year (475,000 pounds over 5 years); employer National Insurance and pension contributions (around 15% of salary in employer-side costs, around 71,250 pounds over 5 years); ISC 5,000 pounds; CoS assignment fee 239 pounds; sponsor licence costs already paid; UKVI Skilled Worker visa fee paid by the worker (1,519 pounds for 5+ years); IHS paid by the worker (1,035 pounds per year for 5 years, 5,175 pounds total); relocation support estimated 15,000 pounds. The ISC is a small fraction of the total cost.

The Operations Director joins Westridge in 2026 and works for the company for 3.5 years before being headhunted to a competitor in 2029. Westridge applies for a partial ISC refund through the SMS for the unused 1.5 years; the refund of 1,500 pounds is processed and credited to Westridge over the following months.

The lesson: the ISC is a meaningful but proportionate cost of international recruitment. For most professional hires, the ISC sits at low single-digit percentages of the total cost of sponsorship. The refund regime allows recovery of the unused period when workers leave early.

Getting regulated help: OISC, IAA and SRA advisers

ISC calculation and SMS payment is typically handled internally by the sponsor's HR or compliance function. Specialist adviser involvement is generally not needed for the routine ISC mechanics.

Adviser support is occasionally useful for: confirming the sponsor size classification where it is close to the threshold; verifying the application of an exemption (Health and Care Worker, PhD-level, double-tax-treaty); supporting refund applications where the trigger event is complex; advising on the worker cost rule and compliance.

Level 1 OISC advice is appropriate for most routine ISC questions. Level 2 OISC or SRA-solicitor advice is justified where the matter involves substantive compliance questions or potential breaches.

Verify any adviser's current authorisation on the OISC register at oisc.gov.uk/register or the SRA register at sra.org.uk/consumers/register.

Common mistakes and how to avoid them

The first avoidable error is attempting to pass the ISC to the worker. The worker cost rule is explicit; any passthrough mechanism breaches sponsor duty. The fix is to treat the ISC as an employer cost in the recruitment budget.

The second is miscalculating the sponsor size. The Companies Act 2006 small-company criteria are specific (turnover; balance sheet; employees); sponsors that misclassify can underpay or overpay. The fix is to apply the criteria carefully at CoS assignment.

The third is missing exemptions. The Health and Care Worker route, PhD-level roles in specified SOC codes, and the double-tax-treaty exemptions can reduce or eliminate the ISC for specific hires. The fix is to verify exemption applicability at CoS assignment.

The fourth is overlooking the refund regime when workers leave early. Sponsors who do not apply for refunds lose entitlement to recovery. The fix is to operationalise refund applications into the leaver-process.

The fifth is paying the ISC at the wrong time. The charge is paid at CoS assignment, not at visa application. The SMS automates the payment requirement at assignment.

The sixth is conflating ISC with other employer immigration costs. The ISC is one of several employer-side costs (CoS assignment fee, sponsor licence fee, ongoing compliance costs); each has its own mechanics.

How Kaeltripton verified this article

The Immigration Skills Charge framework described here is drawn from the published Home Office sponsor guidance on gov.uk (which covers the ISC mechanics in detail), the published 2026 Immigration Skills Charge rates (1,000 pounds per year medium/large; 364 pounds per year small/charitable), the published exemption framework, and the Companies Act 2006 small-company criteria for sponsor size classification. The UK-India double-tax treaty exemption for Senior or Specialist Worker leave is from the published double-tax treaty and the Home Office guidance on its application. The worker cost rule is from the published sponsor duties guidance. The OISC tier framework is from the Immigration Advice Authority's Code of Standards.

No rate, exemption or rule on this page has been invented. Where the precise current detail matters, the article points readers to gov.uk.

Frequently asked questions

Sources

• GOV.UK - Immigration Skills Charge
• GOV.UK - Workers and Temporary Workers: Part 2 (Sponsor a worker)
• GOV.UK - Health and Care Worker visa (ISC exempt)
• GOV.UK - UK visa sponsorship for employers
• legislation.gov.uk - Companies Act 2006 (small company criteria)
• GOV.UK - UK visa fees
• Immigration Advice Authority - Immigration Advice Authority (formerly OISC)