Coins for upgrades

I have just been told you need coins to upgrade your buildings is this right??

yes, but it doesnt give u much more output

Upgrades from level 1-15 cost no coins.
To further produce resources from 15-20 there is coin cost.

This is related to resources only and excludes Warehouse, Cranny, Main Building, Barracks.

16. 1500 10 coins
17. 1822 25 coins
18. 2080 40 coins
19. 2400 60 coins
20. 2695 90 coins



why is no1 looking into the guide section...

yes its 10 coins for going 15-16, 25 coins for 16-17, 50 coins to go 17-18, 67 coins to go 18-19 and 100 coins to go 19-20. and thats for each individual output lol