If you’re leasing for the first time you may not know the answer to this question. The short answer is yes, HST (Harmonized Sales Tax) is applicable on all commercial real estate rents in Ontario, Canada. If you have previously rented a residential apartment where HST is not added onto the rent this may be a bit of a surprise.
If you are leasing a commercial, industrial, or office building for the purposes of running your business, HST is applicable on all rents including additional rents such as TMI or CAM. You should expect that all advertisements and listings that show lease rates don’t have HST added yet, much like the prices advertised in retail stores are prices without tax added yet. When you want an agent to write an offer to lease, HST will be added then so you can see the big picture on rent.
Any confusions or questions about HST should be cleared up with your accountant or applicable government authority.