The Average Period Formula is: (Months left after 1st drawing + Months left after last drawing) / 2
Withdrawal Timing 1st Drawing (Months Left) Last Drawing (Months Left) Average Period Formula Average Period (Months)
End of each half year 30 Sept (6) 31 Mar (0) (6 + 0) / 2 3
Beginning of each quarter 1 Apr (12) 1 Jan (3) (12 + 3) / 2 7.5
Beginning of each month 1 Apr (12) 1 Mar (1) (12 + 1) / 2 6.5
End of each quarter 30 Jun (9) 31 Mar (0) (9 + 0) / 2 4.5