Finance ministers from the Group of Seven rich nations will vow this week to support their economies as they emerge from the pandemic and reach an "ambitious" deal on a minimum global corporate tax in July, a draft communique showed.

G7 officials, set to meet in London on Friday and Saturday, will also say that once the recovery is well established, they will need to "ensure long-term sustainability of public finances," which is understood to be code for a gradual withdrawal of stimulus.

The G7 comprises the United States, Japan, Britain, Germany, France, Italy and Canada.