Gold does not produce any trade value instead, it is converted directly into ducats. Careful management of trade can make it the most powerful source of income by far, which makes control of trade-important provinces instrumental for a long-term increase of a nation's economical power. The trade value produced by each province flows into the trade network, where it is eventually collected by capitals and merchants and converted into ducats. This amount depends on the good's prices, the province's base production, and the production efficiency (among other modifiers). Unlike in EU3, production income is added directly to the state's income each month. Production is a measure of the amount of income generated in a province by local producers of its trade good. Various tax modifiers exist that may change this amount. There is also a National Tax Income, that is calculated at a countrywide level. The yearly province tax amount is the multiple of the two amounts. Each province has a base tax (which may be increased by spending administrative power), and a tax income efficiency. Tax comes directly from the population of a province, and produces a relatively dependable baseline income. However, this number is considered to be difficult to reach without using console commands or mods.
The maximum amount of ducats a country can have in its treasury is 1 million. Hovering over the source or bonus shows a tooltip with detailed information, such as modifiers or a breakdown of income by province. This panel lists both the total amount from each source and that source's bonus (if any). The continuous sources of income that a country has is listed in the "Income" column, which is on the left side of the Economy panel (see right). Unlike in EU3, all income is liquid and does not need to be minted. Income is the sum of all money gained monthly.
ECONOMIX 4 PLUS
The "Income" column lists regular streams of income, and effect by modifiers plus efficiency (in grey, middle column).