More details of a scheme to match Ukrainian refugees with people in the UK who are considering opening up their homes are to be set out later.
A website enabling people to express an interest in helping - for which they will receive a "thank you" of £350 a month - will then go live.
Levelling Up Secretary Michael Gove said the plan could benefit tens of thousands of displaced people.
Meanwhile, the PM spoke to Ukrainian President Zelensky on Sunday night.
Boris Johnson pledged "to pursue more options for bolstering Ukraine's self-defence", No 10 says, and discussed efforts to end the war.
He also condemned the murders of [American journalist] Brent Renaud and countless innocent Ukrainians, Downing Street said.
The government is to send 500 portable electricity generators for use in facilities such as hospitals and shelters which have lost power following the invasion - something President Volodymyr Zelensky made a direct request for.
Mr Johnson is hosting a series of meetings with Nordic and Baltic leaders in London and Chequers this week.
No 10 says he will urge them to work together to ensure no further nations fall victim to Vladimir Putin's aggression.