Production buildings =/= Production income



Yes, it's a little confusing, but you really just need to pay attention to the tooltips themselves, as Production buildings does not mean buildings that boost Production income.



If you select any province you'll see Tax, Tariff, and Production.



An inland province will provide 3 different revenues (or 4 if you include toll, but is very minor and only affected by Trade Efficiency and Base Tax, so buildings have no direct effect)

Tax, which is the province Base Tax multiplied by your Country and Province Tax Modifiers (100% city, -% revolt risk, intolerance, etc).

Production Income, which is the province Trade Value * Production Efficiency.

Yearly Census Tax (mouseover the Tax), which is your Tax multiplied by your Direct Tax Modifiers (land 10%, cored 90%), and goes straight to your treasury on Jan 1st.



If said province suddenly becomes oversea, the current Tax and Production will be added together and halved to become your Tariff (which will be modified by tariff and sealane efficiency).

Then it'd wipe out all Production income, while giving the province a -90% province tax modifier.



As to how buildings effect these incomes.

Workshop and Stock Exchange (Tax Income) adds to the province Base Tax like Capital, CoT level, and National Focus modifiers.

Constable and Treasury (Direct Tax) adds to the Direct Tax Modifiers. (note that the Oversea modifier essentially kills it unless it has a CoT)

Town Hall and Mint (Local Tax Modifier) adds to the Province Tax Modifier.

Dock and Counting House adds to your Production Efficiency.

Trade Depot + Road/Market + Canal (Trade Income/Local Trade Income Modifier) increases the Trade Value of a province.