Salary
Average Salary: $52,000
Expected Lifetime Earnings: $2,170,896
Pay depends on what kind of caddie you want to be. For part-time caddies, the amount you make is kind of up to you (a rarity in the working world). It depends how many days you want to work and how many rounds you're willing to do in a single day.
A place like Pebble Beach charges golfers eighty dollars per carried bag, and caddies can carry two bags per round. Of course, lots of that money will go right back to the course, but anything lost to the club can be made up in tips.
Each eighteen-hole round typically lasts around three hours, so you may be able to caddie multiple rounds in a day. If you do your job well, you can end up making some decent money.
Caddies working for the pros make around $1,000 a week, plus a percentage of tournament purses when their player places. The better the finish, the better the compensation. Usually, the caddie's portion of the winnings ranges between five and ten percent (source).
Ten percent may not sound like a lot, but if your golfer wins the $1.62 million purse at the Masters, you're looking at a six-figure payday. In 2006, when Tiger Woods was, well, Tiger, his caddie made $1.27 million in a single year between his salary, cut of Tiger's winnings, and personal endorsements (source).
While that's definitely an outlier in the world of caddying, it's worth noting that if you make it to the top, you can end up pretty well off.
This feels like an appropriate time to mention that the money in men's golf is much greater than that in women's golf. The total purse for the 2014 men's U.S. Open was nine million, while the purse for the women's tournament was only four million. No one ever said the "P" in "PGA" stood for "progressive."
As far as benefits go...there's not much good news there either. Caddies are pretty much on their own when it comes to health insurance and retirement plans. There are ways to build up those accounts on your own, but in the meantime you should probably stand at a safe distance away when people are swinging clubs around you.