Some would even consider "Perquisite," often referred to as a perk.
C for commission
Commission is the incentive pay received by a salesperson.
The word for the incentive pay received by a salesperson is COMMISSION. Other words might be percentage, brokerage, share, portion, dividend, premium, fee, consideration, or bonus.
The first letter of a five letter word meaning big incentive pay received by a salesperson is 'B' for the word bonus.
"c" as in commission
A salesperson earns commission.
c is the first letter of "commission" , which is probably the word you have in mind.
f (false, fraud); c (commission)
c for commission
c (commission), p (perquisite)
c, for commission
First letter is C = commission
The letter is C for commission.