Since we moved to the one year maternity leave and I stopped taking JK/SK students then I started charging the same rate for everyone because they are only with me for a little over 2 years. Before I did charge more for an infant based on the work I was doing - I provided food for example. If someone were to come to me with a baby under 9 months I would likely add a premium. Mostly now I just raise my rates when it comes time to replace a child leaving for school so it balances out. I don't raise my rates for families once they are in care.