I usually leave 15% at restaurants and $1/night in hotels. I tend to leave it on the desk, usually with a thank you, like Braindrain does. I have left spare change on the desk and not had it taken, unless there is a note indicating its for the housekeeping staff.


In restaurants, I used to use the sales tax as my guideline.

In Alberta, you can triple the GST (5%), or in BC, round up on the HST (which is 12%) on the bill. I tip before taxes.