Tax baseline

The tax baseline is the basic rate at which property taxes are charged (i.e. the rent at an island with 0% additional tax).

Baseline rent

	Shoppe	Deluxe stall	Medium stall	Small stall
Tailor	6750	5500	4250	3000
Iron Monger	1750	1500	1250	1000
Shipyard	6750	5500	4196	2891
Distillery	1750	1500	1300	1000
Weavery	3625	3000	2375	1750
Apothecary	3625	3000	2500	2000
Furnisher	6750	5500	4167	3000
Fort	5500
Palace	5500

Tax baseline observed on a large island with over 250 population and 0% tax rate.
At population 250 and below, tax rate decreases linearly from the above values down to 1/4 the above values at zero population.

You can work out the additional tax payment by doing a simple sum.

<base tax> X 1.<% on island> = tax rate

For example lets take the tailors at deluxe grade on an island where the tax is at 30%...

5500 X 1.30 = 7150 (final tax payment)

<Base tax> <multiplyed by..> <1.tax rate> <equals final rate>

I am not too sure how to do the 100% tax increase but what you could do insted is multiply it by 1%, get the differnce of the base and 1% and then multiply the base by 99%, then add the 1 and 99 together, should give you the right number.