It depends on what source the eanings are derived from. If it is income from employment, then the tax deducted by your employer will be paid over to the Inland Revenue by 19 May 2005 at the latest. If it is self-employed income or other income not taxed at source, then you will declare the income on your tax return for 2004/05 (which you will submit after next April)and pay any tax due by 31 January 2006. If this is your first year of receiving income not taxed at source, you will be expected, also on 31 January 2006, to pay 50% of your 2004/05 tax bill again, as a payment on account for the next year (subject to the Inland Revenue allowing a reduced payment in specific cir***stances). You will therefore effectively pay 150% of your 2004/05 tax bill on 31 January 2006. You will then pay a further 50% (of your 2004/05 bill)on 31 July 2006, and the following 31 January you will pay the balance of your tax bill for 2005/06, plus a new payment on account for the next year (equivalent to 50% of your 2005/06 bill). If the earnings you are talking about for 2004/05 are not from a new source, then you may alreasy be making your "on account" payments in this way. Please clarify what the source of these earnings is.