Can an online store charge me more than the price I saw at checkout?

No — once you've completed an order at the price shown, that price forms the contract, and a retailer can't unilaterally charge you more afterward. The more common problem isn't being overcharged after the fact — it's fees quietly appearing only at the final step of checkout, a practice called "drip pricing." A narrow federal rule now bans this specifically for live-event tickets and short-term lodging, and a growing list of states ban it for general retail. But there's a real gap: outside those specific state laws, ordinary online retail purchases in the US aren't covered by a comprehensive federal all-in-pricing requirement.

The federal rule is narrower than people assume

The FTC's Rule on Unfair or Deceptive Fees (16 C.F.R. Part 464), effective May 12, 2025, requires businesses to disclose the total price — including all mandatory fees — upfront, banning the classic "low advertised price, fees appear at the end" tactic. But it only applies to two specific industries: live-event ticket sales and short-term lodging (hotels, vacation rentals). It does not create a general requirement for all online retail. The FTC still retains broader authority to pursue deceptive pricing under Section 5 of the FTC Act, and has brought enforcement actions on that basis outside these two industries — but there's no blanket federal rule covering ordinary e-commerce the way there is for tickets and lodging.

States are filling the gap

What's actually protected, and what isn't

• Protected everywhere: once you've completed your order at a given price, the retailer generally can't retroactively charge more for that same completed transaction — this is basic contract law, not tied to any of the specific rules above.
• Protected if buying tickets or short-term lodging: the federal junk-fees rule requires the total price to be shown upfront, not revealed only at the final step.
• Protected if you're in California, Colorado, Massachusetts, Minnesota, or Oregon (or Connecticut from mid-2026): your state's own comprehensive law likely covers general online retail too, not just tickets and lodging.
• Not specifically protected: general online retail purchases (clothing, electronics, home goods) in states without their own law, and outside the ticket/lodging federal rule — though the FTC's general deceptive-practices authority can still apply in clear cases.

What to do if you were charged more than you expected

1. Screenshot the price shown at every step, especially right before you click "place order" — this is your strongest evidence if the final charge differs.
2. If the charge on your statement doesn't match what you agreed to pay, this may be an unauthorized charge or billing error — contact the retailer first, then dispute with your card issuer if unresolved.
3. If fees only appeared at the very last step before you'd committed (not after), check whether your state has a comprehensive drip-pricing law (see above) or whether it falls under the federal ticket/lodging rule.
4. Report deceptive pricing patterns to the FTC (ReportFraud.ftc.gov) or your state Attorney General even outside the specifically covered categories — this feeds broader enforcement.

Related questions

• Can a seller cancel my order after I have paid?
• Can a website charge me for an extra service I didn't select?
• Total Purchase Cost Calculator

Official sources

• FTC — Rule on Unfair or Deceptive Fees
• California Attorney General