The total secretary of the Rail, Maritime and Transport union, Mick Cash, acknowledged passengers are being "fleeced thousands of kilos yearly for the privilege of travelling in crowded, unreliable companies".
The Independent has calculated that some passengers will cover more than 1 per mile.
The Retail Price Index for July each year is used by governments to set regulated railway fares from the following January, which include season tickets and saver returns on long-distance services.
Critics have urged the Government to freeze fares or link them to the Consumer Price Index instead, which is significantly lower and is the Bank of England's preferred measure.
Greater Anglia, which holds the franchise for the majority of rail services in Norfolk, has confirmed its fares will be increased by 2.6pc on January 2, 2020.
Other fare rises are decided by train companies.
On exactly the exact same afternoon, Avanti's any-time cuisine from Watford Junction to Rugby is set to rise to #65. 20. That takes the price per mile above £1 per mile.
An annual season ticket to the capital from Welwyn Garden City, which Grant Shapps represents, will rise from £3,016 to £3,097.
The announcement comes as a total bunch of thousands of commuters on South Western Railway companies are bracing themselves for industrial action spot to ideal with regards to all of December. The fare rises to £3,438. They are stopping work on nearly every day in December in a dispute over the role of guards.
A Cardiff-London offpeak return, now #81. Between Bristol and Newcastle, a Number 162.
Paul Plummer, chief executive of industry body the Rail Delivery Group said: "We understand that no-one wants to pay more for travel, which is why train companies have for a third year in a row held the average fair increase below inflation while still investing to improve journeys".
'As part of a long-term improvement plan being delivered by the rail industry 1,000 extra carriages and 1,000 extra services will be added in 2020.
The chief executive of the Campaign for Better Transport, Darren Shirley, said: "January's above-inflation fare rise will no doubt leave passengers dismayed after years of appalling service".
"With little relief in sight for many from delays, cancellations and overcrowding it'll be an inauspicious beginning to the brand new year for the railway".
Staff are quitting work with the network, according to Birmingham, in a parallel dispute over the use of guards. They will strike every Saturday until the end of the year.