Earlier in the day, Johnson's spokesman said that his cabinet of senior ministers had already agreed to his proposal to reform how the social care system is funded.
The prime minister will also reportedly say that the social care reform is a "fair, reasonable, and necessary plan" to guarantee the NHS has the long-term funding it needs to recover from the impact of the COVID-19 pandemic.
"We must act now to ensure the health and care system has the long-term funding it needs to continue fighting COVID and start tackling the backlogs, and end the injustice of catastrophic costs for social care. My government will not duck the tough decisions needed to get NHS patients the treatment they need and to fix our broken social care system", the prime minister said.