Stockpiling is accumulating a supply of items that will be used within reasonable time, while hoarding involves accumulating an excessive collection of items without a plan to use or discard them. Even though stockpiling and hoarding are different, stockpiling can lead to hoarding. Some people become addicted to finding items for free or at very low prices. Hoarders may start out by harmlessly stockpiling items, but their accumulation can escalate into a widespread problem.
Stockpiling has a goal, while hoarding serves no purpose other than to fulfill a selfish desire. Many people like to stockpile because they can pay less for items that will be used within a reasonable amount of time. People who stockpile should have a plan and a purpose for the items they purchase.
Stockpiling is organized while hoarding is disorganized. A person who stockpiles often stocks three to 12 month's worth of items that he uses on a regular basis. His stockpile doesn't take over his living space and is well organized on shelves or in the pantry or a closet. In contrast, a person who hoards retains items which accumulate and cause problems by impairing his day-to-day living conditions with stacks of clutter throughout.
Many people are motivated to hoard items because they enjoy the thrill of finding an item and purchasing it. In contrast, people like to stockpile so they will have enough food, or other items, in case of an emergency, such as unemployment, or in the event of a natural disaster. When people stockpile, they usually buy in bulk and store the items for future use.