DD12 gets $40/month allowance, which I dole out the first weekend of the month. I consider that her "pay" for being a child, which is her job right now

I don't pay for chores - those are expected because she is part of the family, and all members have to participate in making the household work. She does lose part or all of her allowance occassionally as a punishment for serious infractions of the rules. In that situation, she still has to do her chores.
She has to cover just about all of her wants out of her allowance.
I cover needs such as school supplies, what I consider a reasonable amount of clothing, medicines/health supplies incl. things like acne medicine (yes, to me that is a need because it helps her self-esteem, and a good self-esteem to me is a need), etc.
I also cover a very few wants that I just feel it's a parents job to cover - things like her school yearbook. I can't explain it any better than that - it's just a gut feel for me that "I should cover that one". I also cover $10/month of usage on her cell phone (pay as you go plan) - if she goes over that, she has to cough up the cash or live with a dead cell phone until I reload it again.
It's working for us. But it does require me to say to her A LOT "that's a want, not a need - if you want it, you have to pay for it". She is pretty good at this point though in deciding "it's not worth it" when she has to pay for something herself. It's amazing how much stuff they suddenly don't want anymore when they have to spend their own money on it

But we are already discussing our next Disney trip in August, and even a possible trip to Paris next summer, and the fact that she better make a plan to save enough spending money for those trips because I won't be providing any.