HMRC is stepping up a campaign to target the super-rich by targeting people using overseas companies or trusts to hide property deals.
The Daily Mail reports insiders saying said there are proposals to expose complex offshore structures in places such as Panama and the British Virgin Islands.
HMRC is trying to clamp-down on many ultra-wealthy people buying properties in Britain through these secretive offshore structures.
Since many are non-domiciles, they do not have to pay tax on money earned offshore, but if they earn money from a British property, it is taxable here.
However, if property deals take place between offshore companies it is difficult for the Revenue to identify the real owners and to determine whether they owe any tax.
The Revenue is believed to have been encouraged by a deal signed last month with Swiss authorities over offshore bank accounts which means it will get tax owed on cash held in Switzerland.
A Revenue source told the Mail: "The Swiss deal and a similar agreement with Liechtenstein have been about cash in the bank, but we want to focus now on beneficial ownership structures."
What made financial headlines over the weekend?
To promote 'long-term investment'
Switching 'hard and expensive'
Smaller funds still packing a punch