The state pension is expected to rise by 3.9% from April - more than double the rate of inflation.
Such an increase means pensioners can expect an rise of just over £6 per week on the New State Pension from the current rate of £168.80.
But hundreds of thousands of over-75s will see around half their pension rise wiped out by the cost of paying for their own TV licence, after the benefit was scrapped.
And millions of benefit claimants under 65 still face grave uncertainty.
DWP chiefs today refused to confirm benefit claimants will get a rise - despite their payments falling drastically behind inflation for seven years running.
The April 2020 state pension rise - which would still have to be approved in Parliament - is revealed today because of the way the benefit is calculated.
Tory ministers pledged to protect the state pension with a 'triple lock'. That means it rises by inflation, 2.5% or average earnings - whichever is highest.
CPI inflation for September 2019 was 1.7%, today's figures confirm. However, average weekly earnings rose by 3.9% in the year to May to July.
Despite the rise for pensioners, working-age benefits are still in limbo despite claimants being driven into debt and turned to food banks under Tory austerity.
The Prime Minister has so far refused to confirm the freeze on working-age benefits will end as planned in April 2020.
Ministers previously said the freeze would end in April, and former Tory welfare chief Amber Rudd urging Mr Johnson to honour the pledge.
But new DWP Secretary Thérèse Coffey today refused to give a firm pledge that the benefit freeze will end in April 2020.
She told MPs the DWP is in talks with the Treasury over 120 benefit rates. But she added: "Until I get the analysis which is due before the end of the month, then I won’t be in a position to say exactly what we’ll do on every single product line.”
She added: "I think there’s a general desire from the PM to see how we have that increased prosperity and how we then share the benefits of increased prosperity with everyone in society.
"I can’t give you a definitive outcome.
"We’re looking very carefully right now on what we can do about the benefits going forward from 2020."
Most working-age benefits were limited to 1% rises for three years from 2013 then frozen for four years from 2016.
Writing in July, MPs demanded Boris Johnson reversed the cruel freeze by handing families bumper rises of 4% per year for four years.
The Work and Pensions Committee said Tory austerity had “steadily eroded” benefit rates by nearly £1bn more than planned, and “very disadvantaged people are losing out”.
