Drug dealing, trafficking and prostitution, money laundering and fraud are just some of the crimes police will be looking to uncover in today’s operation.
More than 1,300 police officers are working across London targeting key figures in organised criminal networks, gang members and street-level offenders, as the MPS continues its total war on crime.
Operation Stimtone 2 is the largest day of action the MPS has ever put together to tackle criminals by specifically investigating their financial activities.
Officers from the 32 London boroughs will be taking part in 360 separate operations working with the Specialist and Economic Crime Command.
The teams will also be trying to weed out rogue landlords, people handling stolen goods and those conspiring to defraud charities, as well as seizing assets and confiscating money from criminals using the Proceeds of Crime Act 2002.
Using their specialist skills, around 200 financial investigators will sift through a range of financial data in detail, painstakingly unravelling the full amount criminals may have made from crime with a view to confiscating the illegal cash and spotting other illegal activity. They will also work to identify individuals who have assisted criminals as well as new victims.
Leading Operation Stimtone 2, MPS commander Steve Rodhouse said: "Money is the main motivation for many criminals, be they heads of organised criminal networks, gang members or street-level offenders.
“The money they make from crime earns them status in the eyes of associates; it funds more crime and, for some, pays for them to lead luxurious lifestyles they do not deserve.
“They make billions of pounds from crime every year and it is their countless victims who pay the price - both literally and in respect of the emotional, mental and physical impact on them.
"When we take away criminals' money, we take away a lot of their capability and motivation to commit crime. This is why today we have over 1,300 officers all set on depriving criminals across London of their criminal proceeds."
You can follow the key results on Twitter @metpoliceuk or with the hashtag #opstimtone.
If you believe someone is living off money from crime, you can contact the police by calling 101, or Crimestoppers anonymously on 0800 555 111.