“403 Charge on payment or other benefit (1) The amount of a payment or benefit to which this Chapter applies counts as employment income of the employee or former employee for the relevant tax year if and to the extent that it exceeds the£30,000 threshold. (2) In this section “the relevant tax year” means the tax year in which the payment or other benefit is received . (3) For the purposes of this Chapter— (a) a cash benefit is treated as received— (i) when it is paid or a payment is made on account of it, or (ii) when the recipient becomes entitled to require payment of or on account of it, and (b) a non-cash benefit is treated as received when it is used or enjoyed. (4) For the purposes of this Chapter the amount of a payment or benefit in respect of an employee or former employee exceeds the£30,000 threshold if and to the extent that, when it is aggregated with other such payments or benefits to which this Chapter applies, it exceeds£30,000 according to the rules in section 404 (how the£30,000 threshold applies). (5) If it is received after the death of the employee or former employee— (a) the amount of a payment or benefit to which this Chapter applies counts as the employment income of the personal representatives for the relevant year if or to the extent that it exceeds£30,000 according to the rules in section 404, and (b) the tax is accordingly to be assessed and charged on them and is a debt due from and payable out of the estate. (6) In this Chapter references to the taxable person are to the person in relation to whom subsection (1) or (5) provides for an amount to count as employment income.”
“42. As is well known the PAYE system is designed to recover tax due on income of an employee from its source, that is the employer, and in anticipation of the liability which arises at the end of the year of assessment in which it is paid. Accordingly it is hardly surprising that the PAYE regulations do not impose any liability on the employee. That is done by the primary legislation, namely ITEPA, to which I have referred, and the general machinery for collection contained in theTaxes Management Act 1970 ("TMA"), to which I now turn. 43. Part VI of TMA deals with "Payment of Tax". S.59A deals with payments on account of tax. It imposes the now familiar requirement to pay tax on 31st January and 31st July, the first of which is payable during the relevant year of assessment and the second only three months after its conclusion. It applies if in the previous year of assessment the tax on the income of the taxpayer from all sources exceeded the amount of tax deducted at source by a fraction to be prescribed by regulations. Thus a liability is imposed on a taxpayer in respect of his income in excess of that from which tax has been deducted at source. This section was referred to by Peter Smith J in paragraph 72 of his judgment as reinforcing the position that the Claimant "is liable to pay tax on his own earnings if it is not deducted". 44. The matter is put beyond doubt by the provisions of s.59B. That provides that the amount shown in a taxpayer's self-assessment unders.9 TMA for any year of assessment less (1) the aggregate of payments on account made by him under s.59A or otherwise in respect of that year and (2) any income tax deducted at source "shall be payable by him as mentioned in subsections (3) or (4) below". Those subsections deal with the time of payment by reference to notices given under ss. 7 or 8 TMA. But all of them recognise that the sums "payable by" the taxpayer are recoverable by the normal assessment procedures. 45. Counsel for the Claimant seeks to avoid what appear to me to be the obvious consequences of the legislative provisions to which I have referred on the grounds that s.59B is concerned with the mechanics of calculation of the liability, not its imposition. In one sense, of course, it is. It provides the mechanics for recovering the sums due in respect of the liabilities imposed by ITEPA in the provisions to which I have already referred. What it does not show is that an employee is not liable for tax on his employment income, including gains arising from the exercise of share options.”