Longman Dictionary of Contemporary English
Wikipedia
Performance-related pay or pay for performance is a salary or wages paid based on how well one works. Car salesmen or production line workers, for example, may be paid in this way, or through commission.
Many employers use this standards-based system for evaluating employees and for setting salaries. Standards-based methods have been in de facto use for centuries among commission-based sales staff: they receive more pay for selling more, and low performers do not earn enough to make keeping the job worthwhile even if they manage to keep the job.
Usage examples of "performance-related pay".
He'd had a steady climb on the career ladder over the years, gaining enough performance-related pay awards to enable him to pay off the mortgage on this house in three years.