TI4 Rules DeskTwilight Imperium 4
Living Rules Reference · v2.0
28

Deals

A deal is an agreement between two players that may or may not include a transaction that involves physical components.

Players can make deals with each other at any time, even if they are not neighbors. However, deals that include a transaction must follow the rules for transactions, including that the players be neighbors.
Deals are binding or non-binding according to the conditions of the deal.
If the terms of a deal can be resolved immediately, it is a binding deal. When a deal is binding, a player must adhere to the terms of the agreement and whatever transactions, if any, were agreed upon.
  1. The results of playing an action card, including the act of successfully resolving a card, are not instantaneous and cannot be guaranteed. They cannot be part of a binding deal.
If the terms of a deal cannot be resolved immediately, it is a non-binding deal. When a deal is non-binding, a player does not have to adhere to any part of the agreement.

Source: Twilight Imperium: Fourth Edition — Living Rules Reference v2.0 (September 22, 2020), page 16. Rules text reproduced verbatim; the rulebook’s diagrams are omitted. Report an error on this page.