Tax efficiency in the game doesn't really bring in much income.

[YusufAliDE 239]

Why am I earning so little from taxes?
Even if the population is large, raising taxes will not work

[Łukasz Jakowski 13,205]

Here is how it is calculated:

GameValues.tax.BASE_INCOME_POPULATION_INCOME + (Math.min(province.getPopulationTotal(), GameValues.tax.TAX_EFFICIENCY_MAX_POPULATION) / GameValues.tax.TAX_EFFICIENCY_POPULATION_DIVIDE)
                * (taxEfficiency / 100f) *
                 (Math.max(0.01f, 1.0f + civ.civBonuses.IncomeTaxation - province.getDevastation() - civ.getCorruption() + (province.getReligion() == civ.getReligionID() ? 0 : GameValues.religion.BASE_INCOME_DIFFERENT_RELIGION) + (province.haveACore ? 0 : GameValues.core.BASE_INCOME_NON_CORE)))

 

[Marerjh 279]

9 hours ago, YusufAliDE said:

Why am I earning so little from taxes?
Even if the population is large, raising taxes will not work

For taxes to be as effective as the economy (without taking into account the impact on production), at least 82,500 people must live in the province.

Take a look at tax revenue for Germany in the modern world:

Here's what happens when you invest in tax efficiency:

Just keep in mind that in all scenarios, tax efficiency is for some reason lower compared to the economy. Also, in all scenarios except Victorian Era, Great War, Modern World and World War II, your provinces will never have enough population for tax investments to be profitable. I don't like the current implementation of taxes tho. 

It seems that taxes were balanced around the population of the modern world, but in medieval scenarios, the world's population is 3-10 times smaller than the actual one. I don't know why the developer doesn't just increase the population in medieval scenarios.

Edited Thursday at 09:03 PM by Marerjh

[YusufAliDE 239]

I guess I never realized this because I rarely played in modern times.
Thank you!