Bonus : prime
A bonus is a payment made in addition to one’s basic salary. It is often used as a reward for good performance.
A bonus is not the same as commission which is money earned as a percentage of sales made. Only sales staff, therefore, make commissions, whereas any employee can earn a bonus.
In job advertisements, one can often see things like ‘salary + commission’ for sales jobs, or ‘salary + bonus’ for other jobs.