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The Immigration Skills Charge is the per-certificate fee sponsors pay the Home Office for most Skilled Worker and Senior/Specialist Worker Certificates of Sponsorship, intended to fund domestic skills training, and it is charged upfront for the full sponsored period rather than monthly.
Who pays, and at what rate
Two banding factors decide the bill: whether you're classed as a small or charitable sponsor versus a medium or large one, and how many whole years (rounded up) the Certificate of Sponsorship covers. A 30-month certificate is charged as three years, not two and a half. Because both the banding thresholds and the per-year rate are set centrally and have been revised before, treat the figures on gov.uk's sponsorship collection as the only source you quote to hiring managers.
How the calculation actually works
The rounding is the part that trips people up. Any part-year of Certificate of Sponsorship validity rounds up to a full year for billing purposes, so a certificate running two years and one day is charged as three full years, exactly like a 30-month certificate is charged as three. The charge attaches to the certificate, not to the worker's eventual time in post — if the worker leaves early, resigns, or the role ends before the sponsored period is used up, the charge already paid isn't automatically recalculated down; you would need to actively pursue a refund for the unused portion, evidencing when the employment actually ended. Extending a worker's stay later doesn't reopen the original calculation either — it generates a new charge for the additional period being sponsored, on top of what was already paid for the first term.
What counts as a small or charitable sponsor
The small/charitable banding generally tracks the same kind of size test used elsewhere in company law — turnover, balance sheet total, and average employee headcount — or registered charitable status, and it's assessed at the point each certificate is assigned rather than fixed permanently at the point your licence was granted. That matters because businesses cross the threshold in both directions: a group restructure, an acquisition, a strong trading year, or simple headcount growth can move you from small to medium without any change to your sponsor licence itself. Reassess your banding at renewal and before any large hiring round, rather than assuming the classification you used last time still applies.
Routes and roles where it doesn't apply
The charge isn't universal. It doesn't apply to the Health and Care Worker visa sub-route, to most Global Business Mobility categories outside Senior/Specialist Worker, or to occupations sponsored at PhD level under the relevant SOC codes. It also generally doesn't apply a second time where a worker switches into a new role with the same sponsor inside an already-paid period, though the rules on exactly when a fresh charge is triggered are specific enough that they're worth checking against your salary and role assessment before assigning a new certificate.
Where it sits in the sponsorship process
Payment happens at CoS assignment, before the worker submits their visa application, so it's effectively a cost of intent to hire rather than a cost of a successful hire. That sequencing is why finance and HR teams need visibility earlier than the offer letter stage — by the time an applicant is filling in their visa form, the charge has already been paid. Building the check into whatever system tracks your sponsorship documents and certificates means nobody assigns a CoS without the cost being logged against the right budget line.
What happens if the wrong amount is paid
Underpaying because the wrong banding was applied isn't self-correcting — the Home Office can pursue the shortfall, and if a compliance visit finds a pattern of misclassified certificates, it reads as a record-keeping and sponsor duties problem, not simply a billing error to be quietly fixed. That's the same kind of finding covered in our guide to Home Office enforcement visits. Overpayment can potentially be recovered, but it isn't automatic either — you would need to evidence which banding should have applied and when the error occurred.
Compliance record-keeping
- The CoS reference and its assigned validity period
- Proof of ISC payment and the banding applied (small/charitable vs medium/large)
- Any exemption claimed, with the reasoning on file
- Refund applications and outcomes, where relevant
- An internal sign-off trail showing who approved the CoS assignment and its cost against budget
- A record of when sponsor size banding was last reassessed, and against what figures
These sit alongside the wider record-keeping duties in your sponsor licence, and gaps here are a routine finding in Home Office compliance visits, not just an accounting nicety.
FAQs
Is the Immigration Skills Charge refundable if we cancel a certificate before it's used?
Yes, provided the CoS is withdrawn or unused before the worker starts, though it must be actively claimed and evidenced.
Does extending a Skilled Worker visa trigger the charge again?
Generally yes — an extension usually needs a new Certificate of Sponsorship, and a new CoS means a fresh ISC calculation for the extended period.
Does the charge apply to a sponsored worker's dependants?
No. The Immigration Skills Charge is calculated once per Certificate of Sponsorship for the main applicant. Dependants have their own separate visa application fees and immigration health surcharge, but they don't trigger an additional skills charge.
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