Consumers can buy the so-called 9-euro monthly ticket from Deutsche Bahn from May 23 - provided the Bundestag and Bundesrat agree to the project.
The ticket is then available via the DB Navigator app and all other digital rail channels, the group announced on Sunday.
"It will also be available at around 5,500 Deutsche Bahn ticket machines and in over 400 DB travel centers in train stations," it said.
With the monthly ticket, passengers can travel around Germany on public transport for nine euros - in all cities and across all network borders.
Tickets can also be bought online or at the counter from other transport companies.
Many associations have already announced that they also want to start selling on May 23rd.
In June, July and August, the special tickets are intended to enable travel in local and regional transport throughout Germany - for 9 euros a month and thus much less than with normal monthly tickets.
This is part of the relief package with which the traffic light coalition of SPD, Greens and FDP is reacting to the high energy prices.
At the same time, it should be a taster offer to win more customers for buses and trains.
Parliament and the Federal Council will have to vote on the project next week.
9 euro ticket valid from the first to the last day of the month
With the 9-euro ticket, there is "a unique opportunity to get more people excited about local public transport and climate-friendly rail in the long term," said Jörg Sandvoß, head of the responsible railway subsidiary DB Regio.
According to Deutsche Bahn, the 9-euro ticket will always be valid from the first to the last day of each month.
So if you only access it in the middle of the month, you can only drive around with it for the remaining half of the month.
From the start of sales on May 23, it should be possible to buy tickets for all three months at the same time.
The federal government is financing the project by transferring 2.5 billion euros to the states to compensate for the loss of income.