Iceland
calendar year
India
1 April - 31 March
Indonesia
calendar year; note - previously was 1 April - 31 March,
but starting with 2001, has been changed to calendar year
Iran
21 March - 20 March
Iraq
calendar year
Ireland
calendar year
Isle of Man
1 April - 31 March
Israel
calendar year
Italy
calendar year
Jamaica
1 April - 31 March