The move comes after Chancellor George Osborne decreed in his Autumn Statement earlier this month that new fares should be kept in line with July's inflation rate of 3.1%.
This is the lowest increase in four years and means a single journey from Bracknell to London Waterloo will cost £12.70 - up from the current £12.30.
First Great Western has announced its fares will rise by 3.1% in the new year - the smallest increase in four years.
It means the cost of a day return ticket between Reading and London Paddington will rise by 50p to around £17.70 while regular commuters to the capital could have to fork out nearly £150 more for a season ticket - up to just under £4,850.
The rise will come into force on January 2.
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