Important Annual Limits
Earliest due dates for payment of tax

Income Tax  
Employment Most tax paid under PAYE
Interest, dividends Lower/basic rate liability usually settled before receipt
Untaxed sources, plus balance on employment
and higher rates on
investment income (self assessment)
Payments on account for 2012/13 on 31.1.13 and 31.7.13 based on 2011/12 tax; balance due 31.1.14 with first instalment for 2013/14.
Capital Gains Tax 31 January following the tax year with self-assessment income tax.
Inheritance Tax Normally 6 months after month of death.
Corporation Tax Large companies pay by instalments starting 6 1/2 months through the accounting period; small/medium companies pay 9 months and 1 day after end of period.