diplo annex cost for subjects in 1.13

[ForzaA]

Did some of my own investigating on the subject..

That's quite the convoluted calculations we use there, and the UI giving incorrect and inconsistent values isn't exactly helping.
Adding a task in our database to improve this.

 

[ForzaA]

The below is my current understanding of it, based on the data collected while determining that there was a problem, and which areas of the game are (potentially) affected
I have not, at this time, had a chance to verify this in the code, nor confirmed the intended functionality. For my own sanity, I am going to assume that the Actual Total Cost is accurate (or at least closer to accurate than what the confirmation dialog suggests)

I have not determined whether there is an actual minimum cost.

Actual Total Cost =SUM_allprovinces (Development* (1+[local]Hostile Core Creation)) * 8 * (1- Administrative Efficiency) * (1 + Diplomatic Annexation Cost)
(rounded down to nearest integer)

(note that beneficial Diplomatic Annexation Cost modifiers are scripted/displayed negative, Administrative Efficiency, positive)

The Confirmation Dialog displays this as

"Due to their Development of FLOOR[Development*(1+HCC)] "
and
"the annexation will cost a total of FLOOR[development*(1+HCC)] * FLOOR[8*(1-AEff)*(1+DAC)] "

(floor being the rounding down to nearest integer)

 

[ForzaA]

As far as I can determine - you will pay for the *exact* cost according to the formula on the previous page (except for the last month, which will cost you a full tick regardless of how much is left of the annexation) , so stacking always has utility; whether any particular reduction is worth it is another question. The rounding is a graphical thing only.

 

[ForzaA]

HCC is applied per province, not on top of total development so your formula needs to be tweaked. This can be tested pretty easily with Portugal at game start. Portugal has 121 development, so their integration cost according to your formula would be 968. Their actual cost is 996. This is because Portugal owns Cueta, which has 7 total development and has +50% HCC. (121-114)*8 + 7*8*1.5 = 996.

You are, of course, correct - Like I said, I just based that formula on the data I collected while writing up a bug report for our DB.

Updated the formula.