A commute subscription from Lucerne to Dübendorf, EMPA costs CHF 327 per month in 2nd class and CHF 2943 per year. All prices are available on sbb.ch. If you decide to take out the subscription, you can buy it online (if you already have a SwissPass card) or directly at a serviced SBB sales point (even if you don’t yet have a SwissPass).
Have a nice day.
Kind regards, VlaznimA.