How to stop impulse buying

An impulse buy is a purchase you did not plan to make until a minute before you made it. Everyone makes them, and most are small. They add up because they are frequent, and because the systems around them are built to make the next one easy.

The good news is that impulses follow patterns. Once you know which times, moods and prompts set yours off, you can put a pause in exactly those places. This playbook does that in three parts: find the triggers, add friction, and replace the habit.

Why it works

The consumer researcher Dennis Rook described the buying impulse in 1987 as a sudden, powerful and persistent urge to buy something immediately. The economist George Loewenstein showed why such urges win: a strong in-the-moment state narrows attention to the thing in front of you, and it fades soon after. Both point to the same tactic. You do not need to beat the urge. You need to outlast it, and the easiest way to outlast it is to make buying slower than the urge is long.

Sellers know this too, which is why so much of online shopping is designed to remove pauses. Each tactic below has a matching piece of friction.

Step 1: Find your triggers

For two weeks, log every unplanned purchase, and every near miss, with four details: the time, where you were (or which app), your mood, and what prompted it. Most people find their buys cluster around a handful of these.

• Time of day. Late evening on the phone, the lunch break, payday.
• Mood. Boredom, stress, tiredness, sadness, or celebration after good news.
• The cart. Items left in a cart, and the reminder emails that follow them.
• Free-shipping thresholds. “Add $11 to get free shipping.” In data from an online retailer, Michael Lewis, Vishal Singh and Scott Fay found that shoppers were very sensitive to shipping fees and that free-shipping thresholds increased the size of orders. The extra item usually costs more than the shipping would have.
• “Only 2 left.” Low-stock warnings and countdown timers use the scarcity effect. When researchers crawled about 11,000 shopping sites in 2019, they found countdown timers that simply reset when they reached zero.
• “Was $120, now $59.” The crossed-out price is an anchor, and it makes the sale price look like a gain. That is the anchoring effect.
• Drops and launches. Limited releases and friends’ posts work on FOMO, the fear that the moment will pass without you.

Decision rule: the two triggers that appear most often in your log get the friction first.

Step 2: Add friction where it counts

Each of these takes a few minutes, and together they turn one tap into several steps.

1. Delete saved cards from every store, food app and browser. Typing the number each time is the point.
2. Turn off one-click buying and payment autofill.
3. Log out of shopping apps, or delete them from your phone. You can still shop in a browser when you mean to.
4. Unsubscribe from store emails and turn off shopping notifications. Every one of them is a prompt you did not ask for.
5. Never use the cart as a wish list. Empty it before you close the tab.
6. Pay for weak categories with cash or debit. In experiments by Drazen Prelec and Duncan Simester, people told to pay by credit card were willing to pay considerably more than people told to pay in cash, in some cases up to twice as much.
7. Keep one list for every unplanned want, with the price and date. Then use the 30-day rule: nothing on the list is bought before its decision day.

Step 3: Replace the habit

Friction blocks the old route, but the trigger still fires. Give it somewhere else to go. Pick your most common trigger from the log and match it with one replacement, phrased as an if-then plan. Peter Gollwitzer’s research found that plans tied to a specific situation are followed more reliably than general intentions.

• If I am bored on my phone after 9 p.m., then I put it on the charger in another room and read.
• If I have had a bad day, then I call someone or take a walk before opening any app.
• If I get good news, then I celebrate with a meal at home or a transfer to savings, not a purchase.

Decision rule: one replacement per trigger, and give it a few weeks. A new routine takes time to feel natural, and the first fortnight is the hardest.

What to do in the moment

The urge is strongest in the first few minutes. Have a routine ready.

1. Name it. “This is an urge, and it came from the sale email.” Naming the trigger moves you from wanting to watching.
2. Close the tab without adding to the cart, or put the item back on the shelf.
3. Write it down on your list, with the price and the trigger.
4. Do something with your hands for ten minutes. Wash a dish, walk around the block, text a friend.
5. Let the list decide. If you still want it, it waits for its decision day like everything else.

Variations

• In stores. Shop from a written list, take a basket rather than a cart for small trips, and skip the aisles you do not need. The layout is designed to pull you off your errand, and a list gives you a reason to leave.
• On a tight budget. Impulse buys on credit cost twice: the item and the interest. Start with step 2, and leave cards at home on days you do not need them.
• Couples and families. Agree on a small personal amount each month that nobody has to justify. Small impulses inside it stop being arguments, and anything over it goes on the list.

What goes wrong, and the fix

• Browsing replaces buying. Window-shopping online keeps the urge warm. Fix: treat browsing as the trigger, not as a safe alternative.
• The reward purchase. A good week ends with a treat. Uzma Khan and Ravi Dhar found that a virtuous choice can make the next indulgence more likely. Fix: choose rewards that are not purchases, or put them on the list.
• Saved cards creep back. A site asks to remember your card and you click yes. Fix: check the browser and your main stores once a month.
• The bundle that looks like a deal. Add-ons and “complete the look” suggestions are impulse buys with better design. See the complete-the-look trap.