The men were held on 21 October in Chatham, Kent, and Shepherd's Bush, west London, on suspicion of the commission, preparation or instigation of acts of terrorism.
Waseem Mughal, 22, of Railway Street, Chatham, and Younis Tsouli, 22, of Richmond Way, Shepherd's Bush, were each charged today with conspiracy to murder, conspiracy to cause an explosion, conspiracy to cause a public nuisance, conspiracy to obtain money by deception and other offences under the Terrorism Act.
They were due appear for remand at Bow Street Magistrates' Court at 2pm this afternoon.
The investigation is not connected to the 7 July London bombings.
Mughal was charged with a total of ten offences, Tsouli a total of eight. The other charges each faces under the Terrorism Act include alleged offences relating to the possession of articles for terrorist purposes and fundraising.
A third man Tariq Al-Daour, 19, of Queens Court, Queens Way, Paddington, west London, was also charged today with offences under the Terrorism Act. He had been arrested on October 22 after voluntarily attending a London police station.
Al-Daour was charged with conspiracy to obtain money by deception and terrorism offences relating to the possession of money for terrorist purposes and fundraising.
He was also appearing this afternoon at Bow Street Magistrates' Court.