Trade

Trade is one of the ways to generate income. Trade occurs by creating trade routes between two planets belonging to different civilizations. Both civilizations receive a financial benefit. If either party has the Entrepreneurs ability, both planets also receive.

The trade income from each individual trade route is shown on the Trade tab in the Govern Civilization screen.

Creating a trade route
Creating a trade route requires sending a FREIGHTER undefined to a planet controlled by another civilization. Establishing a trade route consumes a trade license, of which only a fixed number are available, represented by.

Trade income
The trade income generated by a colony is the sum of its trade route values, modified by its bonus.

Value of trade routes
The amount of income generated by a trade route is computed separately for each planet and depends on the type of trade route (see below), according to the following formula:

(A + B + C)*(1 + D)

Where
 * A is sum of the of the two planets multiplied by the income percentage (2.5% for basic trade routes),
 * B is based on the distance between the planets; it is product (bounded between 1 and 250) of the number of tiles and the per tile modifier (0.1 for basic trade routes),
 * C is based on the age of the trade route and accumulates at a rate of 0.1 per turn (bounded between 1 and 250)
 * D is the bonus for the planet, plus 0.15 if the planet belongs to the initiating civilization.

Types of trade route
A civilization can have one of three types of trade route: basic, luxury and slave. All civilizations create basic trade routes initially and switch based on ideological choices. Each type provides unique bonuses and generates income slightly differently, according to the following parameters.