When to buy school supplies to pay less

Verdict: Buy the basics in late summer, wait on the rest. The first week of school is the worst time to find a bargain.

When should you buy school supplies? In general, late July through August is the best window. Stores compete on basics such as pens, paper and binders, and prices on those items are often at their lowest. Dates change each year, so check the retailer for current offers.

What is the rule?

Get the official list first. Many schools post one, and some teachers send a list in the first week. Buy only what is on it, plus what you know you will run out of. Items sold as "back to school deals" may not be on your list at all.

Which things are worth buying early?

• Paper, notebooks, pencils and pens. These are the loss leaders. Stock up if you will use them.
• Backpacks. Prices are often fair in late summer, but check the zippers and straps.
• Art and craft basics. Cheaper in bulk if you will use them.

For calculators, tech and special items, wait for the list and check the price history before paying.

The exception

Skip the sale on things you already have. A third pack of markers is not a saving. If a school buys supplies as a class pack, do not duplicate it. After the season, leftovers get cheaper, so mid-year top-ups can wait until after the rush. For bigger tech purchases, see back to school laptop deals.

A quick way to avoid doubles

Before you shop, check what is already at home. Open the pencil case, the drawer and last year's backpack. Many items last more than one year, and a half-used notebook can still be used. Buy the rest in one trip, not many, since small extra buys add up. If a teacher asks for a certain brand or type, follow that, and skip the sale on anything the list does not mention. Lists and prices change each year, so check the school page and the retailer.