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The Immigration Skills Charge (ISC) is a mandatory fee UK sponsors pay to the Home Office each time they assign a Certificate of Sponsorship on the Skilled Worker or Senior/Specialist Worker route; it is charged for the whole length of the certificate and cannot lawfully be passed on to the worker.
What actually changed, and what didn't
The charge structure itself has stayed consistent for several years: sponsors are billed per year (or part-year) of Certificate of Sponsorship validity, at one rate for small or charitable sponsors and a higher rate for medium and large sponsors. What has shifted, most recently in 2025, is the rate itself and the surrounding policy noise from the immigration white paper. Because the exact current figures move, always confirm them against the sponsor duties and compliance guidance before quoting a cost internally rather than relying on a number you saw last year.
Why sponsors get caught out
Most of the pain isn't the rate itself, it's timing. The ISC is invoiced at the point a Certificate of Sponsorship is assigned, before the visa outcome is known, and it's calculated on the full sponsored period even if the worker's actual start date slips. A three-year Skilled Worker certificate issued in month one of a hiring plan can land as a single lump-sum cost that finance teams weren't expecting, especially where Level 1 Users assign certificates without looping in whoever owns the budget.
Multi-year hiring plans and budget forecasting
The timing problem compounds fast for any sponsor bringing in more than one or two workers a year. Because each certificate is billed upfront for its full term rather than spread across the employment, a cohort of ten hires on three-year certificates lands as ten separate lump sums clustered around your recruitment rounds, not a smooth monthly cost. It's worth costing the ISC at requisition stage — before a role is even advertised — alongside the other pre-hire checks that determine whether a role and salary actually qualify, such as the salary floor and going rate for the occupation, so a hiring manager isn't approving a headcount that finance hasn't actually funded.
When a change resets the charge
Not every change to a sponsored worker's situation triggers a new charge, but several common ones do. Moving a worker to a new sponsor always means a fresh Certificate of Sponsorship and a fresh ISC bill, even though their total time in the UK hasn't changed at all. A genuine change of role that requires issuing a new certificate — rather than simply updating job title or duties under the existing one — usually resets it too. Before assuming an internal move, promotion, or restructure is cost-neutral, check with whoever manages your Certificate of Sponsorship assignments whether it actually needs a new one.
Building it into hiring, not just onboarding
Treat the ISC as a hiring-decision input, not a payroll afterthought. Before a certificate is assigned, work out the full-term charge for the intended CoS length, check whether the role or worker qualifies for an exemption (certain PhD-level occupations and the Health and Care Worker visa route are the main ones), and confirm the sponsor size banding you fall into hasn't changed since your last renewal. Building this check into your sponsorship compliance workflow stops it becoming a surprise at invoice stage.
Common planning mistakes we see
- Assigning the longest available CoS length ‘to be safe’ without checking whether a shorter, renewable certificate would ease the upfront cash cost.
- Not rechecking sponsor size banding at each hiring round — a strong trading year, a group restructure, or crossing a headcount threshold can move a business from small to medium without anyone noticing until the invoice arrives.
- Treating the exemption list as fixed — eligible occupations and routes have been adjusted before, so a role that didn't qualify two years ago may now, or vice versa.
- Letting a hiring manager verbally confirm a start date before the ISC decision has gone through the same approval as the rest of the offer, so finance only learns about a significant invoice after the candidate has already been told yes.
Keep the paper trail
Retain the CoS record, the ISC payment confirmation, and the reasoning if you applied an exemption. If a certificate is later shortened, withdrawn, or the worker's role changes, you'll need that trail to support any refund claim or to answer a compliance officer's questions during a visit. A reminder set against each CoS assignment is a simple way to make sure someone actually checks the charge before it's paid, not after.
FAQs
Does the ISC change if a visa application is refused?
Yes — a refusal, withdrawal, or grant for a shorter period than sponsored can all trigger a full or partial refund; the sponsor must apply for it, it isn't issued automatically.
Can we recover the ISC cost from the sponsored worker's salary?
No. Passing the Immigration Skills Charge (or the CoS fee) on to the worker, directly or through deductions, is a breach of sponsor duties and a common trigger for licence action.
How do we forecast ISC costs when we don't yet know the final CoS length?
Model against the longest plausible length first, since it's easier to release unused budget than to find extra funds mid-process. Revisit the figure once the route and case type are settled and before the certificate is actually assigned, but keep finance sign-off based on the higher estimate until then.
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