It is not cheap to dress kids. They grow fast, blow through sizes like the wind (my son spent like 18 months in 2T and about a week in 3T) and invariably are the wrong size in the wrong season if you have by some stroke of luck managed to stockpile some hand-me-downs or bought ahead at end-of-season clearance sales.
One way to save on name-brand clothes is consignment stores. At these, you can sell your outgrown kids' clothes that are in good condition and get store credit or cash. I find these are not always great money-savers; between clearance sales, regular sales and special offers I find I can save more on brand-new clothes. But let's say your child transitions into a new size in, say, April; it's not warm enough yet to buy a bunch of shorts or play skirts in their new size, but they're only going to be in cool-weather clothes for a few weeks, most likely, so you don't want to buy warm sweaters and cozy pants for just a short few week's wear. And even if you did, regular stores have shifted to summer merchandise. That's a good time to hit the consignment stores.
If you don't have one near you, check out ThredUp; you can buy used clothes for a fraction of what they would cost new or send in a bag of your child's nicest used clothes and get cash or credit.
Do you shop consignment stores? What good finds have you come across?