You’ll have to check with other local providers or see what the range is for the after school programs in your home schools. Try inputting your postal code into the daycare bear search engine and see what comes up.
If your hours are longer in the afternoon, that price should be increased.
In my area of Halton, home providers are $25-30 a day. Not sure what the market is like in Guelph, but I think you’re under charging for the afternoons.
Also, in my area, afternoon care is in very high demand and hard to find, so often providers will charge $18-20 just for the afternoon care( if the parents don’t want the morning)
A space is still a space in our total of 5 kids, so don’t under value yourself for a child that only brings in a small fraction of a full day child.
Many providers have gotten away from before/ after care, as sometimes it’s not really cost effective after supplying crafts and snacks( I’ve had kids eat 2-3 servings of morning and afternoon snack)