I charge a significant tax for in-office work located more than 10min from a train -- and it's less like the 3% 'dumb comms stack' tax I charge for having to use Teams and more like a "if your office is there, the baseline you need to pay based on today's rent for a 2-bedroom flat within 15 min walk to the office is..." number (hint: fresh grads should be able to afford a 1-bedroom flat within walking of their day job and still have money for food; and experienced staff should get more than that).