Every year Quebec’s housing tribunal, known in French as the Tribunal administratif du logement (TAL), releases a set of calculations to help landlords and tenants figure out how much rent should increase. This year it recommended 5.9 per cent for an unheated apartment — the largest increase in at least 30 years. So how does the TAL come up with this number? We’ll look at how the rental increase formula works, and hear why both tenants and landlords seem to want it to change.