Official handicap index is computed on the 1st of every month. Scorecards entered after the 1st day of the month would only be computed in subsequent month. Therefore, your official handicap index would remain constant for the month, except for handicap revision. Once a player gets his/her handicap revised after the 1st of the month and before the closing date of the tournament, he or she will have to play off with the revised handicap. Likewise for handicap freeze but release before closing date of the tournament he or she will play off with the computed handicap.