A dispute is the formal process by which a client or freelancer asks Upwork to intervene over hours invoiced on an hourly contract or funds held in escrow on a fixed-price one, through mediation by Upwork and, if unresolved, arbitration.
Most Upwork contracts end without one, but the process is what gives the protections their weight. On an hourly contract a client who believes hours were not worked as described can dispute them during the review window after the weekly billing cycle closes; Upwork then checks the Work Diary segments against the contract and the memos and decides which hours stand. On a fixed-price contract either side can dispute a funded milestone, which freezes the escrow until the matter is settled.
Fixed-price disputes have two stages. First comes mediation, in which an Upwork specialist helps the two parties reach an agreement on how the funds are split; it is not binding and Upwork does not rule on who is right. If mediation fails, either party can take the case to arbitration by an independent arbitrator, for a fee that Upwork sets and that both sides pay; a party who declines to pay forfeits the claim.
A dispute is not a review of quality. Upwork looks at whether the work matched the contract and whether the hours were genuine, not at whether the design is good. It is also a matter of record: a contract that ends in a dispute is one that ended badly, and the feedback and the Job Success Score tend to follow. Upwork's Help Center sets the windows and the fees, which may change.
How Upwork Insights uses it
This term describes Upwork's own rules or product rather than a figure the index measures; the pages that do carry live figures are the stats and rate pages.