The negative side of a high iph...

[Winnson]

My advice for now would be to dump your sloppy excess into your syndicate instead of into your bank.

There will be upgrades, or the game will end.

Either way, why not pump up your syndicate bankroll instead of your own?

[Winnson]

If you got a Trillion in syndicate reserves before the next round of upgrades starts, you will have a serious head start.

[sister morphine]

Actually, the fastest way to increase your IPH is to upgrade whatever building has the highest IPH. "return on investment" has very little to do with "income per hour."

Edit: If only tramp stamp were still here to explain all of this!

ROI; that always made me laugh. It's not real money people

[Jeronimo]

ROI is indeed not the same as IPH, but to grow IPH the fastest you'll have to choose the best building for your own collection cycle by comparing IPH/ROI. ROI is not the number which grows IPH, but it has influence in growing IPH faster, as when you upgrade a building with a medium income, but with a great ROI (like Shamrock Pub) you'll earn a lot and you just have to spend a little amount for the upgrades. When you get to an IPH which makes it possible for you to upgrade the best IPH building over and over, than just do that instead of looking at IPH and ROI. It's also a matter of what you think is best for your hood and your collection scheme, as that is different for everyone.