The current restrictions are due to expire on 24 March.
But Mr Johnson told MPs he expected the last domestic rules would end early as long as the positive trends in the data continued.
He said he intended to return after parliamentary recess - which is from 21 February - to outline the government’s strategy for living with Covid.
“It is my intention to return on the first day after the half-term recess to present our strategy for living with Covid,” Mr Johnson said at the start of Prime Minister’s Questions.
“Provided the current encouraging trends in the data continue, it is my expectation that we will be able to end the last domestic restrictions - including the legal requirement to self-isolate if you test positive - a full month early.”
The law will be replaced with guidance, Downing Street said - and for example people will be urged not to go to work if they have Covid.
Back in January, Mr Johnson said the restrictions would end for good when they expired in March - and hinted they could end sooner.
“The self-isolation regulations expire on 24 March, at which point I very much expect not to renew them,” he said at the time. “Indeed were the data to allow, I would like to seek a vote in this House to bring that date forwards.”
- What Covid rules remain across the UK?
- How are travel rules being relaxed?
- When do you need to self-isolate?
Rules for travellers coming to the UK are also being relaxed later this month.
A calculated risk or a gamble …
The trends are positive but this decision has still taken some by surprise - infection levels are still high and it’s unclear what this will do to the spread of the virus.