Tax calendar
2004
  
April  
6th Maximum investment limits for Enterprise Investment Scheme (EIS) and Venture Capital Trusts (VCTs) due to rise to £200,000. Reinvestment relief no longer available for VCT investments, but effective tax relief rises to 40%. Tax rate for trusts rises to 40% (32.5% dividends) from 34% (25% dividends).
14th Instalment of corporation tax due for large companies with accounting period ends: 31 December 2003, 31 March 2004, 30 June 2004 and 30 September 2004.
19th Pay over tax and NIC due on IR35 deemed salary for 2003/04. Also pay PAYE & NIC for month to 5 April, and 4th quarter 2003/04.
30th IHT due on any lifetime transfers made between 6 April 2003 and 30 September 2003. (Due date is 3 May, but this is a Bank Holiday Monday.)
May
3rd Submit forms P46 (car) for quarter ended 5 April 2004.
19th File CIS forms and P60, P35 and P14 for 2003/04. PAYE and NIC due for month ended 5 May.
26th Final deadline for filing forms P14 and P35 after seven day grace period under ESC B46.
28th Issue employees with copies of forms P60 for 2003/04. (Due date is 31 May, but this is a Bank Holiday Monday.)
June  
18th PAYE and NIC due for month to 5 June. (Due date is 19 June, but this is a Saturday.)
30th File CT600 return for year end 30 June 2003. File accounts at Companies House for private companies with year end 31 August 2003 and public companies with year end 30 November 2003.
July  
5th Last day to reach PAYE settlement agreement for 2003/04. Close company to elect for all beneficial loans to a director to be treated as a single loan.
6th File forms P11d and P9d with the Inland Revenue and give copies to employees. File forms P11d (b) to return Class 1A NIC due for 2003/04.
14th Instalment of corporation tax due for large companies with accounting period ends: 31 March 2004, 30 June 2004 and 30 September 2004, 31 December 2004.
19th PAYE and NIC due for month to 5 July and for 1st quarter 2004/05. Class 1A NIC due for 2003/04.
30th File accounts at Companies House for private companies with year end 30 September 2003. Second payment on account of income tax due for 2003/04.  Automatic fine of further £100 (or tax outstanding, if less) for all 2002/03 tax returns still not submitted. 5% surcharge on unpaid income tax and CGT due for 2002/03. File accounts at Companies House for public companies with year end 31 December 2003. (Due dates are 31 July, but this is a Saturday.)
August  
2nd Submit forms P46 (car) for quarter ended 5 July 2004.
19th PAYE and NIC due for month to 5 August.
31st File accounts at Companies House for private companies with year end 31 October 2003 and public companies with year end 31 January 2004.
September  
17th PAYE and NIC due for month to 5 September. (Due date is 19 September but this is a Sunday.)
30th Personal tax return for 2003/04 must be submitted if Inland Revenue is to complete the tax calculation. 
October  
1st National Minimum Wage increases. CT due for SMEs with accounting periods ended 31 December 2003.
5th Individuals must inform Inland Revenue of new sources of income or gains if no tax return received for 2003/04.
14th Instalment of corporation tax due for large companies with accounting period ends: 30 June 2004, 30 September 2004, 31 December 2004, and 31 March 2005.
19th Tax and Class 1B NIC due under PAYE Settlement Agreements for 2003/04. PAYE and NIC due for month to 5 October and 2nd quarter 2004/05.
29th Last day to ask Inland Revenue for a self-assessment tax return to complete for 1998/99. File accounts at Companies House for private companies with year end 31 December 2003 and public companies with year end 31 March 2004. (Due date is 31 October, but this is a Sunday.)
November  
2nd Submit forms P46 (car) for quarter ended 5 October 2004.
19th PAYE and NIC due for month to 5 November.
30th Last day to apply for special PAYE arrangement for overseas employees. File accounts at Companies House for private companies with year end 31 January 2004 and public companies with year end 30 April 2004.
December  
17th PAYE and NIC due for month to 5 December. (Due date is 19 December, but this is a Sunday.)
24th Last day to submit personal tax return for 2003/04 by internet if tax due of up to £2,000 is to be included in the 2005/06 PAYE code.
30th File accounts at Companies House for private companies with year end 28 February 2004. (Due date is Tuesday 28 December, but this is a Bank Holiday, as Christmas Day falls on a Saturday.)
31st Claim repayment of Class 2 NIC for 2003/04 due to low earnings. Last chance to amend CTSA return for year end 31 December 2002. Submit CT600 return for year end 31 December 2003. File accounts at Companies House for public companies with year end 31 May 2004.

2005

  
January  
1st Corporation tax due for SMEs with accounting period end 31 March 2004.
14th Instalment of corporation tax due for large companies with accounting period ends:  30 September 2004, 31 December 2004, 31 March 2005, and 30 June 2005.
19th PAYE and NIC due for month to 5 January,and for 3rd quarter 2004/05.
31st Final income tax payment and CGT due for 2003/04 year plus first payment on account of income tax for 2004/05. Submit personal tax return for 2003/04, or receive automatic fine of £100 (or unpaid tax, if less). Final date for personal pension contribution to be made with an election to backdate to 2003/04.
February  
2nd Submit forms P46(car) for quarter ended 5 January 2005.
14th Last day to defer Class 1 NICs for 2004/05.
19th PAYE and NIC due for month to 5 February.
28th 5% surcharge on any unpaid income tax and CGT due for 2003/04.
March  
18th PAYE and NIC due for month to 5 March. (Due date is 19 March, but this is a Saturday.)
31st Submit CTSA return for year end 31 March 2003.
April  
5th Deadline for paying into ISA for 2004/05. Last chance to make gifts to use IHT exemption for 2004/05 or to make gains to use CGT exemption for 2004/05. Final day for pension contributions to be made if enhanced protection option to be chosen.
This summary has been prepared very rapidly and may contain errors for which we cannot be held responsible. The proposals are in any event subject to amendment before the Finance Act is passed.