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Online Shopping Mistakes Teens Make

The 10 most common ways teens lose money online — from hidden shipping fees to free-trial traps — and what to do about each one.

5 min read Reviewed May 8, 2026 Grade 7 reading level

Online shopping is fast, easy, and a great way to lose more money than you meant to. Almost every teen has at least one story — a thing that didn't fit, an order that never showed up, a "free trial" that quietly turned into $14 a month. Let's go through the most common traps so you don't fall into them.

Mistake 1: Forgetting about shipping

A $20 shirt with $9.99 shipping is a $30 shirt. Always check shipping cost before you click buy. Some sites hide it until the very last screen. That's not an accident.

If shipping seems wild, look for:

  • Free shipping over a certain amount (sometimes worth combining orders)
  • Pickup in store (often free)
  • Coupon codes for free shipping (try a quick search before checkout)

Mistake 2: Ignoring the return policy

Some sites have free, easy returns. Others charge you to return things. Some don't let you return anything at all (especially small overseas sites — looking at you, sketchy ad-on-Instagram stores).

Before you buy, look for the return policy. If you can't find one, that's a red flag. The FTC mail and online order rules describe what U.S. sellers are supposed to do.

Mistake 3: Trusting too-good-to-be-true ads

If you see "$200 AirPods for $39.99" on a TikTok ad, the AirPods aren't real. They're either fake, broken, or never coming. The FTC scam alerts page is full of these.

Quick checks before buying from a brand you've never heard of:

  • Search "(brand name) reviews scam" — see what comes up
  • Look for a real address and phone number on the website
  • Check if the product photos are stolen from another site (right-click > "Search image with Google")

Mistake 4: Auto-renew and "free trial" traps

A "free 7-day trial" is rarely free. You give them your card. After 7 days, they charge. Then they keep charging every month until you remember to cancel.

Before signing up for any free trial:

  1. Set a reminder on your phone for day 6 to cancel.
  2. Take a screenshot of how to cancel — many sites hide it.
  3. Check your bank statement once a month for surprise charges.

For more on these traps, see our subscription traps article.

Mistake 5: Saving your card on every site

Saved cards are convenient. They're also why you accidentally spend $80 on a Tuesday night. The friction of typing in your card number is good — it makes you stop and think.

Pick 2-3 sites you really trust to save your card on (like Amazon, maybe one game store). Don't save on the rest. You'll spend less.

Mistake 6: Falling for fake reviews

Sites are full of fake five-star reviews — many are paid for, some are written by bots. Spotting them:

  • Lots of reviews posted on the same day = suspicious
  • Reviews with weirdly perfect English praising every feature = suspicious
  • 4,000 reviews and they're all 5 stars = very suspicious

Real reviews mix the good and the bad. Look for those.

Mistake 7: Sharing your card info on insecure sites

Look at the website address. If it doesn't start with https:// (with the s), don't put your card in. The s means the connection is encrypted — the data you send is scrambled so nobody can read it on the way.

Also: never type your card info into a link someone DM'd you. Real stores don't send DMs to teenagers.

Mistake 8: Ignoring the actual size chart

This one wastes more teen money than almost anything else. Clothing brands run wildly different sizes — a "medium" at one store might be a "small" at another. Check the size chart in inches/cm. Take 30 seconds to measure something at home.

Mistake 9: Impulse buying late at night

Studies (and the CFPB consumer education hub) show people make worse money decisions when tired. The "1 a.m. order" rarely ends well.

The 24-hour rule: put it in your cart. Sleep on it. If you still want it tomorrow, buy it. Most of the time, you won't.

Mistake 10: Not checking the bank statement

Look at your bank statement once a month. Look for charges you don't recognize. Anyone — even a stranger who got your card number — could be charging you. The faster you spot it, the faster you can stop it. The CFPB's reporting fraud page covers what to do.

Words to know

  • Auto-renew — when a subscription charges you again automatically
  • Encrypted — scrambled so others can't read it
  • Return policy — the rules for sending something back
  • Impulse buy — buying something without thinking about it first

For more like this, see the Learn hub or our scams hub.

If you're not sure about anything in this article, ask a trusted adult — that's what they're there for.

Common questions

How can I tell if an online store is a scam?

Search the brand name plus "reviews scam." Check for a real address and phone number. Right-click product photos and search the image. The FTC scam alerts page tracks new scam patterns.

I signed up for a free trial and now I am being charged. What do I do?

First, cancel the subscription on the site. Then, if charges continue, contact your bank and dispute the charge. The CFPB consumer tools walk through how to dispute.

Is it safe to save my card on a website?

Pick a small number of websites you trust completely (like Amazon). Don't save your card on every site — both for security reasons and to slow down impulse spending.

What does https:// mean?

It means the connection between you and the website is encrypted, so your card info is scrambled in transit. Without the 's', it's plain text — never put card info into a non-https site.

I ordered something that never came. What now?

Contact the seller first. If they don't respond in a reasonable time, contact your bank or card company and dispute the charge. Federal rules under the FTC merchandise rule protect U.S. buyers in this situation.

Sources

  1. FTC: Mail, Internet, or Telephone Order Merchandise Rule FTC as of May 2026
  2. CFPB: Consumer Tools CFPB as of May 2026
  3. Consumer.gov: Online Shopping Consumer as of May 2026
  4. MyMoney.gov: Protect MyMoney as of May 2026

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