Tax structure and parameters

Income Tax personal allowances and reliefs (Table A1)

• 1948-49 to 1972-73 (PDF 16K) also available in Excel format (XLS 35K)
• 1973-74 to 1989-90 (PDF 9K) also available in Excel format (XLS 18K)
• 1990-91 to 2011-12 (PDF 15K) also available in Excel format (XLS 40K)

Rates of surtax (Table A2)

• 1948-49 to 1972-73 (PDF 7K) also available in Excel format (XLS 18K)

Rates of Income Tax (Table A2)

• 1973-74 to 1989-90 (PDF 8K) also available in Excel format (XLS 26K)
• 1990-91 to 2011-12 (PDF 18K) also available in Excel format (XLS 59K)

Main features of NICs (Table A4)

• 6 April 1975 to October 1985 (PDF 15K) also available in Excel format (XLS 47K)
• 6 October 1985 to 1998-99 (PDF 17K) also available in Excel format (XLS 56K)
• 1999-2000 to 2011-12 (PDF 18K) also available in Excel format (XLS 52K)