11 Psychological Tricks That Make You Spend More Money Without Realizing It

An older woman in a striped shirt stands at a grocery store checkout, holding a receipt and looking at her smartphone. She has a shopping cart in front of her, and shelves with products in the background.

Have you ever walked into a store intending to buy just one thing, only to walk out with a cart full of stuff you didn’t plan for? It’s not an accident. Businesses use psychological trucks to make us spend more money than we intended. These tactics play on emotions, habits, and cognitive biases to push customers into making impulse purchases.

From supermarket layouts to online shopping tactics, here are 11 sneaky tricks designed to get you to part with your cash, whether you realize it or not.

1. The Decoy Effect: Making Expensive Look Like a Deal

Three disposable coffee cups are arranged against a gray background. The cups are labeled with tape: "Small" is on the right, "Medium" on the left, and "Large" in the center. Each has a white lid.
gbrundin/iStock

Retailers place a high-price item next to a slightly cheaper one to make the second option look like a steal. The goal is to manipulate your perception of value.

For instance, a coffee shop offers three sizes: A small for $2.50, a medium for $5.00, and a large for $5.50. The medium appears overpriced compared to the large, so most people will opt for the ‘better deal.’

To combat this, always compare prices based on what you actually need, not what seems like a bargain.

2. The Anchoring Effect: Setting an Unrealistic Price Expectation

Two promotional banners with "TODAY OFFER" labels. The top banner shows a discounted price from $18.99 to $9.99. The bottom banner shows a discounted price from $180.99 to $99.99. Both have a "SHOP NOW" button.
Akhmad Muntaha/iStock

If a store wants you to think that something is cheap, it will show you a much higher original price first. That’s why they always use the “Was $299, not only $150” format. Even if the item was never worth $299 to you, your brain registers the price drop as a huge discount.

To avoid falling for this trap, research the typical price range for the item.

3. The Scarcity Principle: Fear of Missing Out

Text in red reads "Only 1 left in stock - order soon." Below, a yellow button says "Add to cart" and an orange button says "Buy Now.
Amazon

When a store announces that there are “only 3 left,” they know they’re creating a sense of urgency that you have to act now or run the risk of missing out on the product.

Don’t let stores rush your decisions with this tactic, and if you weren’t planning on buying the item that day, don’t let this fake deadline change your decision.

4. Charm Pricing: The $9.99 Trick

Twelve yellow sale tags displaying prices: $0.99, $1.99, $4.99, $9.99, $19.99, $49.99, $79.99, $99.99, $199.99, $499.99, $799.99, and $999.99. Each tag says "ONLY!" in bold black text.
StudioGraphic/iStock

Stores price things ending in .99 or .95 to make them feel cheaper than they really are. It’s an incredibly common tactic because it’s so effective. If an item is $9.99, emotionally, we tend to feel that it’s closer to $9 than it is to $10, though logically, we know that’s not correct.

The best way to steel yourself against this trick is to always mentally round up.

5. The Illusion of Free: Buy One, Get One Free Scam

Two white tags with red text saying "BUY 1 GET 1 FREE," attached with a looped red ribbon, placed on a light gray background.
solidcolours/iStock

Nothing free is ever really free. Businesses increase the price of one item to “give away” another or make you buy extra things you don’t need. Another version of this is “Spend $100, get free shipping.” You have to spend more than you intended to (or wanted to), to get something that’s “free.”

The best way to avoid this is to stop and ask yourself if you’d still buy the item if it wasn’t part of a deal.

6. The Sunk Cost Fallacy: Sticking With Bad Purchases

Close-up of a printed page with the words "SUNK COST" in bold, dark blue text. The surrounding text is blurred, highlighting the main phrase. The page is lit with a cool, bluish hue.
RapidEye/iStock

Once people spend money on something, they don’t want to “waste” it, even if continuing to use it is a bad decision. Examples of this are keeping a gym membership you don’t use because you “already paid” or continuing an expensive hobby even after you’ve lost interest.

It’s best to just accept when something is a loss and move on instead of throwing more money at it.

7. Retail Store Layout Tricks: Making You Walk Past More Stuff

Self-checkout area in a retail store with three stations, stocked with various snacks and items. Signs above each station indicate self-service. Customers are visible in the background, and a large "francisco" sign is on the wall.
okgusto

Store intentionally place essential items (like milk, eggs, and bread) in the back so you’re forced to walk through tempting aisles. Ikea is one of the kings of this by designing its maze-like stores to be a long journey through the entire showroom, rather than letting you just jump to whatever items you’d like to see. Another example is the increasingly common register lines that use long rows of impulse items to usher you into the queue.

The best way to combat this common tactic is to make a shopping list and stick to it.

8. The Power of the Word “Sale”

A red balloon with the word "Sale" printed on it is in the foreground, inside a store with aisles of shelves in the background.
AdShooter/iStock

The word “Sale” triggers excitement, even if the actual discount is minor. It’s very common for stores to mark up prices before putting them on sale.

Avoiding the pitfalls of this one is as easy as doing some quick price comparisons to see what competitors are selling the items for.

9. Social Proof: Making You Want What Others Have

Yellow background with red and white bursts, featuring bold, stylized white and red text reading "BEST SELLER!" in the center. Small lightning bolts and circles are scattered around the text.
PeterPencil/iStock

We, as humans, tend to follow the crowd, so businesses highlight best sellers, trending items, and customer reviews to influence your decisions. The problem is that all of these things can be easily manipulated to guide you to products or brands that you otherwise wouldn’t be interested in.

Just because something is “popular,” according to the retailer, doesn’t mean it’s the right choice for you.

10. Loss Aversion: The Fear of Missing a Deal

Text image showing a "Limited time deal" with a price of $195.47, reflecting a 15% discount. The original list price is $229.97.
Amazon

People hate losing something more than they love gaining something, which is why limited-time discounts work so well. Built off the same psychology as our third example on this list, The Scarcity Principle, this works by making us feel rushed. A great example of this is “50% off today only!”

It’s best to remember that if it wasn’t already on your list before the sale, it’s probably not worth it.

11. Subscription Traps and Free Trials That Auto-Renew

Three banners displaying "FREE TRIAL" offers: a pink banner for 7 days, an orange banner for 15 days, and a green banner for 30 days, each with decorative triangles above and below.
Blueastro/iStock

Businesses make it easy to sign up but hard to cancel, so you keep paying for something you don’t use. “Free for 7 days” trials that require a credit card and auto-renew at full price are a common example of this kind of trap. Another is gym memberships that require in-person cancellations. The hope is that you either forget or give up on trying to cancel so they can charge you until you remember or get frustrated enough to cancel.

The best way to avoid these, at least with the first example, is to set a reminder to cancel before the free trial ends.