Trade post

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Revision as of 21:39, 4 January 2018 by (talk) (added trade post limit calculation formula (source: tests made ingame to validate))
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A merchant republic trade post holding

Trade post.png Trade posts are income-generating holdings that do not count toward a ruler's demesne limit. They can be built by merchant republics in coastal provinces (including provinces they do not own). With the Horse Lords.pngHorse Lords or Jade Dragon.png Jade Dragon DLC, they can also be built by local rulers along the Silk Road.

Contiguous trade posts with the same owner create trade zones. Large, rich trade zones boost the income of their trade posts, along with the income of cities in the zone's provinces.

Merchant republic trade posts

Each patrician can build a limited number of trade posts based upon the size of his family palace, the number of dynastic men he has in his court, and the level of Trade Practices technology in the republic's capital (not the patrician's capital, should the two be different).

Merchant republic trade posts have a base cost of 150 wealth to build and take 12 months. The cost is increased by 30% times the distance to the closest settlement controlled by the builder of the trade post. (For landless patricians, the distance is calculated from the location of their court, which is usually the republic's capital.) The distance is calculated by sea unless the province is adjacent. The cost is also modified by 40% times the province's top liege's opinion of the builder.

Republics with a trade post in a county have a 'Seize City' CB on the local city, subject to various constraints.

Feudal rulers with trade posts in their land receive an Embargo Casus Belli on the Republic, which if successful will raze the trade posts within their borders for a handsome payout. Rulers also have random event chains to attempt to destroy a trade post within their demesne or to demand a bribe from the post's family. Additionally, one Merchant Republic can offer monetary inducements to a Kingdom to embargo another Republic.

Base stats

Characteristic Value
Icon wealth.png Income 6
Fort level.png Fort level 0
Levy.png Levies 0


All Trade post[1] building lines share the same basic requirements as described below.

Building Level 1 Level 2 Level 3
Cost 100 150 200
Construction time 182 274 365
Lot Requirements Building level 1 Building level 2


Building Line Level I Level II Level III
  • +1 Fort level
  • +100 Garrison size
  • +20 Retinue cap
  • +2 Fort level
  • +150 Garrison size
  • +30 Retinue cap
  • +3 Fort level
  • +200 Garrison size
  • +50 Retinue cap
Merchant Enclave
  • +1 Tax income
  • +1.5 Tax income
  • +2 Tax income
  • Yes enables Scouting
Merchant Port
  • +10 Trade value
  • +15 Trade value
  • +20 Trade value

Trade Post limit

The trade post limit of a given patrician is calculated using the following formula:

Trade post limit = (1 + PalaceBonus + Number of unlanded adult male dynasty members in court) * (1 + Trade Practices technology bonus)
  • The product of the above formula is rounded (.5 is rounded up)
  • Palace bonus is determined by the number of extra trade posts granted by the main building upgrade in a patrician's Family Palace (+0, +3, +6, +9 respectively).
  • The Trade Practices technology bonus is a multiplier with the following values at each level: -0.667/-0.333/0.00/0.10/0.20/0.30/0.40/0.50

Example: a patrician with level 4 in Trade Practices in the republic's capital, a Grand Palace (level IV upgrade), 3 sons, 1 brother and no other living unlanded adult male family member is expected to have (1+9+4)*1.10=15.4 i.e. 15 trading posts.

Silk Road trade posts

Main article: Silk Road

The Horse Lords or Jade Dragon DLCs allow any ruler to build trade posts at specific provinces along the Silk Road land route between China and Europe. Silk Road trade posts can only be owned by the owner of a province, and cost 50 gold to build. (Lieges can build and upgrade the trade posts.)

The Silk Road is visible in the Economy and Trade Zone map modes. If a Silk Road province is occupied or is being sieged during a war, the value of trade flowing through the province will be reduced by 10% if under siege and 25% for occupation. Both the trade zone controlled by the province owner and the total trade value along the entire route affect income.

Note that even without trade posts, Silk Road provinces receive passive boosts to taxes from castles, cities and temples.

Silk Road buildings

Coastal Silk Road provinces which are considered important locations can have both standard trade post buildings and Silk Road buildings, if their owner is a merchant republic.

Name Price Build time Effects Requirements
Silk Road Trading Post 200 150 +5 Trade Route wealth,
+1 Trade Post income,
+10 Trade Zone value
Silk Road Market 400 300 +9 Trade Route wealth,
+3 Trade Post income,
+20 Trade Zone value,
+1 fort level
Silk Road Trading Post
Major Silk Road City 800 600 +30 Trade Route wealth,
+5 Trade Post income,
+60 Trade Zone value,
+3 fort level
Silk Road Market


  1. Trade post buildings data is located at /Crusader Kings II/common/buildings/00_tradepost.txt.
Special holdings