Iron bank

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The bank is an investment institution founded in Westeros by the moneylenders from Essos.

Start investing gold dragons and receive interest. You may invest gold dragons in the bank. In 1/7/14 days, you receive the investment including the interest rate.

Investment period Base interest rate
1 day 4%
7 days 29%
14 days 49%

Upgrading the bank increases the amount you can invest and interest rate bonuses. Unlike other buildings, iron bank only goes to level 12 (originally only 9). Similar to the bannerman hall, the bank requires a rare consumable to build: investor's contract is purchasable for gold dragons.

Bank level Required castle level Investor's contracts Extra interest rate Investment amount
1 ? 0? 1% 1025
2 19? 5 2% 1050
3 21 15 4% 1100
4 23 ? 6% 1200
5 25 ? 8% 1300
6 27 270 10% 1400
7 28 1400 13% 1500
8 29 2700 17% 1600
9 30 4900 21% 2000
10 30 8k 21% 2400
11 30 12k 21% 2800
12 30 17.5k 21% 3200