Annual passes
You can travel without limits on SJ’s railway network with the Annual Passes (Årskort). They cost between 40.000 and 80.000 SEK (TODO currency conv), but are unfortunately only available for residents of Sweden with a Personal Identity Number.
Loyalty programme
SJ has a loyalty programme called SJ Prio, which also offers discounted rail tickets after having collected a certain number of points. However, it is unfortunately only available for residents of Sweden with a Personal Identity Number.