Bid increments allow for varying increases over the minimum bid and are based on the number of picks taken. After the last round before a bid increment change, a message will be displayed that the bid increment is about to change for the next player. The new bid increment would be the minimum increase over the minimum bid can be made.
For example:
Minimum Bid = 1
Bid Increment = .50
For those rounds, bids wil start at 1 and can increase at .50 increments.