Purchase Returns and Allowances and Purchase Discounts are contra expense accounts with normal credit balances.

Purchase Returns

Goods returned by the buyer to the supplier due to defects, inaccuracies in shipment, or other discrepancies.

Allowances

A deduction from the gross amount on an invoice by the buyer for goods purchased or to cover some type of shortcoming.

Purchase Discounts

Reductions in the price of goods or services allowed by the seller for early payment by the buyer.