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Infrastructure ROI


philp110
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So this is one of those questions requiring a little math.

Let's say I am going to buy a ton of infra at once. How can I calculate the ROI (return on investment) on the massive amount of cash I am going to drop? I can use the utilities to calculate how much the infa will cost me, and that can give me an idea of where my population will be. But what about my bills? Is there something I am forgetting where I can approximate how much my bills will go up? Not sure how to incorporate labor camp swapping and all that...

Anyway, this is a little above my head. Help would be appreciated!

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Divide your current citizen count by your current infrastructure and you will get citizens per infra. You can then use that number to calculate how many citizens you will get from the purchases (not counting improvements) and then how much that will make you via your income (not counting improvements).

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Divide your current citizen count by your current infrastructure and you will get citizens per infra. You can then use that number to calculate how many citizens you will get from the purchases (not counting improvements) and then how much that will make you via your income (not counting improvements).

Does this take into account 0.2 citizens per mile of land?

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Divide your current citizen count by your current infrastructure and you will get citizens per infra. You can then use that number to calculate how many citizens you will get from the purchases (not counting improvements) and then how much that will make you via your income (not counting improvements).

Good lord this is a bad idea :S

Better idea is to buy 1, or perhaps 10 infra, and see what your citizen count change is.

Or multiple 7.5 times your modifiers to get it.

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Is there something I am forgetting where I can approximate how much my bills will go up? Not sure how to incorporate labor camp swapping and all that...

This. Then work out profit per day as: (taxes in collecting mode)/(bills with LCs) - (swap costs/days per collection cycle). Maximise your profits by leaving more time between collections.

You'll find that beyond low infra levels your actual increase in daily profit due purely to extra infra will be small to tiny, but the increases will initially come from the extra improvements it allows, and after that from wonders. Beyond a point you'll gain almost nothing in daily profit from extra infra as your bills will increase almost as much, but most people will continue to buy it as their lowest priority expense purely to keep growing and becoming more powerful/formidable.

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This. Then work out profit per day as: (taxes in collecting mode)/(bills with LCs) - (swap costs/days per collection cycle). Maximise your profits by leaving more time between collections.

You'll find that beyond low infra levels your actual increase in daily profit due purely to extra infra will be small to tiny, but the increases will initially come from the extra improvements it allows, and after that from wonders. Beyond a point you'll gain almost nothing in daily profit from extra infra as your bills will increase almost as much, but most people will continue to buy it as their lowest priority expense purely to keep growing and becoming more powerful/formidable.

->Beyond a point you'll gain almost nothing in daily profit from extra infra as your bills will increase almost as much

Most people in this game have not reached this point yet

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Good lord this is a bad idea :S

Better idea is to buy 1, or perhaps 10 infra, and see what your citizen count change is.

Or multiple 7.5 times your modifiers to get it.

10 infra, because less than that is a waste unless you're avoiding a jump. Anyway, buy the infra note the citizen increase and scale that to the amount of infra you will buy. Multiply the number of citizens with their taxed money, and subtract the extra bills of your infra to get your increase in net income.

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->Beyond a point you'll gain almost nothing in daily profit from extra infra as your bills will increase almost as much

Most people in this game have not reached this point yet

Yes but most people overestimate their profit gains with extra infra, even at medium infra levels you're approaching this point. People consider the significant increases in income but don't tend to factor in the increases in bills.

My nation setup for example, at 4999 infra has a daily collection of 5.357 and daily bills (same but swap for 5 labour camps, 5 guerilla camps, max soldiers, defcon1, severe threat) of 2.034 million, for a profit of 3.323 before swap costs.

Going to 5999 with exactly the same wonders, tech etc and I will increase my daily taxes by slightly over 1 million to 6.416 mil, BUT my daily bills will also increase by 0.753mil at the same time, increasing my daily profits by only 0.306mil.

The thread was about ROI so the point I was trying to make is that a lot of people go wrong by putting infra as too high a priority which results in them having over-inflated NS and being very vulnerable - quite weak for their NS level. Over a whole month I'd only gain 10mil from this jump while putting myself into range of a lot more nukers so minimising my own nuclear advantage. I'm better off sitting and saving up a good warchest while maintaining tech purchases before I think about the next infra jump. I prefer being powerful for the NS I'm at which means I'll lose comparatively little in the next big war, while someone who foolishly spends it all on infra will have all the difference and more nuked away.

Edited by Chairman Cao
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ROI is greater when the extra citizens allow purchase of another bank.

ROI is less when your nation already has all the improvements it can buy.

ROI is even less than that when you realize "Hey! I got enough infra to support a sweet navy!" and then start buying up expensive ships.

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