Second- through sixth-year associates at bonus-happy Quinn Emanuel Urquhart & Sullivan will receive supplemental rewards based on the high-powered litigation firm's performance, chairman John Quinn announced in a memo Tuesday.

But the memo, first noted by Above the Law and subsequently obtained by The American Lawyer, has a catch. Associates seeking the extra riches can't cash in unless they agree to stick around Quinn Emanuel for another three years.

According to the memo, the firm will contribute a portion of its profits to a bonus pool, which Quinn Emanuel will distribute to eligible associates three years later if they remain at the litigation powerhouse. The first provisional award will be in March 2018. An associate who begins their second year in 2017 could receive a payout every year from 2021 to 2025 as long as they stayed at the firm.