I’m talking about the amount on hand that robbers actually manage to steal. The fact that there may be more money somewhere in the building doesn’t matter if it isn’t accessible.
I found various figures for how much the average bank robber gets from his crime:
$9,386 in 2008. $14,374 in 2009. cite
$5000 cite
$4,330 in 2006. $7,500 in 2010. cite
just over $4,000 cite
$1,000 cite
As for the chances of getting caught:
*“Bank robbery has about as high a clearance rate as murder. About three quarters of all bank robbers are caught. Usually more. By comparison, some property crimes in Dallas have single-digit arrest percentages.” *cite
“Many would say that committing a bank robbery is about the dumbest mistake that a criminal can make. With the technological advances made in the security industry, it is extremely difficult to commit a bank robbery and get away with it. In fact, the Uniform Crime Reporting Program says that more than 50% of all bank robbers are either caught at the scene of the crime or are later identified and arrested from security camera footage.” cite
“Bank robbery has among the highest arrest rate of any crime in the country — 59 percent of bank robberies were solved last year, said Sparks. To compare, about a quarter of the total number of robbery cases nationwide were closed in 2005, and only 12 percent of burglary cases were closed that year.” cite
“The likelihood of catching a bank robber on or near the scene is higher than for other crimes. This is because most bank robberies are reported very quickly, most occur during daylight hours, many have multiple witnesses, and some produce photographic images that can be used to canvass the surrounding area for suspects. Consequently, many robbers are caught the same day. In fact, the clearance rate for bank robbery is among the highest of all crimes—nearly 60 percent.” cite
So while there are disagreements about the exact figures, there is a consensus that the risk-to-reward ratio is against the bank robber. As one source puts it Only An Idiot Would Rob a Bank.