1-3 KILLS : 0/150/300 gold (unchanged)
4 KILLS :  ⇒ 400 gold
5 KILLS :  ⇒ 500 gold
6 KILLS :  ⇒ 600 gold
ADDITIONAL KILLS : [+50] ⇒ +100 gold
Minion & Monster Gold Bounties
BUY THE FARM If, since their last death, a champion has earned 250 more gold from minions and monsters than the enemy team's average* during that time, their bounty increases by 50 gold, plus another 50 gold for each additional 150 gold their advantage grows by thereafter.
MATH : *Average is determined by dividing the enemy team's minion and monster gold by four, rather than five, based on the four sources of income on Summoner's Rift (top/mid/bot/jungle). Modes with smaller teams divide by the number of champs per team instead (ex. 3 for Twisted Treeline).
HIT LIST Bounties over 150 gold are now visible in the scoreboard
Bounty Payout Modifications
REPUTATION Bounties no longer increase mid-combat. If a champion earns multiple kills and then immediately dies, those kills will count toward their next death instead.
HEAVY LIFTING Bounty payouts for killing members of the losing team are reduced, down to a minimum of 20% normal values if the losing team is massively behind
PAYOUT CAP A single kill can no longer grant more than 1000 total gold to the killer. Any bounty gold past the cap rolls over to that champion's next death.