Quote Originally Posted by EatYerGreens
@Martok

Thanks for putting an exact figure on it.

I'm guessing that you worked that out by reading the base-level incomes from the startpos file, allowing for the governor's acumen and then working out how the remaining discrepancy related to the ruler's acumen. (Wish I'd thought of doing that!)
Actually, I didn't even look at the starpos files either, as I had no idea how to do so at the time. (There are others who've done so, however -- would that I'd known how myself!) The way I figured it out was a little less scientific, and a little more....roundabout.

What I did was to run a "test" campaign. Playing as the HRE (since they start with so many provinces), I managed to get my Emperor killed and then replaced with an heir who had 0 Acumen. I then went through and manually looked at the base income of each province I had, making sure to first eliminate any & all income-boosting buildings (trading posts, farm upgrades, etc.). After that, I killed my new 0-Acumen Emperor (suicide mission, I believe), who was replaced by a general with 3 Acumen. I then used the new Emperor (and a couple of his successors) to determine the income boost he gave to his provinces.

It wasn't a very elegant process to be sure, but it did give me the approximate numbers for Acumen. It was only much later (I ran this test campaign over 3 years ago) that I found out I could've just looked at the startpos files -- it would've saved me a fair bit of time and effort, had I but known.