The Upwork Terms of Service are the agreements every client, freelancer and agency accepts to use Upwork, setting out what each may and may not do on the platform and what Upwork charges.
The Terms are a set of documents rather than one: the User Agreement, which carries the main rules, the fee and payment terms, the escrow instructions for fixed-price work, the privacy policy, the Optional Service Contract Terms that apply between a client and a freelancer by default, and policies on acceptable use and identity. Upwork writes them, updates them and notifies users when a change matters; continuing to use the site is acceptance. For an agency, the owner accepts on the agency's behalf and is responsible for its members' conduct under the agency account.
Most of what shapes life on Upwork is in there: the freelancer service fee, flat at 10% since 2023, the client marketplace fee, the non-circumvention period of 24 months and the conversion fee that ends it early, the rule that payment for work found on Upwork goes through Upwork, the one-account-per-person rule, and what Upwork may do when a rule is broken, from an account hold to a permanent suspension. Upwork is a party to the Terms but not to the contract between a client and a freelancer, which is why a dispute over the work itself goes through Upwork's dispute process only as far as payment is concerned.
The Help Center explains the Terms in plain language; where the two differ, the Terms govern. They change, so a rule read from a summary should be checked against the current text and its date.
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.