Drip pricing is when a seller advertises a low starting price and adds unavoidable charges later in the buying process. The extra amount may appear after you enter dates, select a seat, provide a delivery address, or reach checkout.

For a U.S. shopper, a fee disclosed late isn't automatically illegal. The key questions are whether the charge was mandatory, whether a federal or state rule covers the transaction, and whether the seller showed the price clearly enough for you to compare it before buying.

Quick answer: What is drip pricing?

Drip pricing is a pricing tactic, not a particular type of fee. A business promotes a partial price first, then adds charges during the transaction. The charges may be called resort, service, facility, platform, order, delivery, or booking fees.

The FTC's fee-rule FAQ gives this example: a resort advertises a $199 nightly rate and then adds a mandatory $39 resort fee. The unavoidable room price is $238 per night before other applicable charges. For short-term lodging covered by the FTC rule, the total price must be disclosed upfront and displayed more prominently than the lower partial price.

A later price change isn't always drip pricing. Taxes calculated from your address, shipping based on the delivery method, or an optional seat-selection charge may be handled differently. The practical test is whether you can see a realistic total for the exact purchase before paying.

Mandatory fees versus optional extras

The name of a charge doesn't determine whether it's mandatory. Ask whether you can decline it and still buy the advertised product or service.

A mandatory fee may be lawful in some transactions if the applicable rule allows it and the charge is disclosed clearly at the required point. Outside a rule requiring all-in pricing, the fee's label still doesn't make it optional.

Which U.S. rules apply?

There is no single federal ban covering every fee in every industry. The controlling rule depends on the product, seller, transaction, and state.

The FTC rule for lodging and live events

The FTC's Rule on Unfair or Deceptive Fees, 16 C.F.R. Part 464, took effect on May 12, 2025. Its main coverage is:

• Short-term lodging, including hotels, motels, inns, short-term rentals, and vacation rentals
• Tickets for live events, such as concerts and sporting events

For covered offers, the rule generally requires businesses to disclose the total price, including mandatory fees, and make that total more prominent than a lower partial price. Government-imposed charges, shipping, and optional goods or services receive specific treatment under the rule.

The FTC FAQ explains that pre-recorded audio or visual performances and film screenings aren't live events covered by this rule. The rule also doesn't set a maximum fee, require all industries to use all-in pricing, or guarantee a refund when a consumer complains.

That scope matters. A mandatory resort fee on a covered hotel booking may be evaluated under the FTC rule. A similar charge on an unrelated online purchase may instead depend on a state law, another federal rule, or general prohibitions against deceptive advertising.

California's SB 478

California's SB 478 became operative on July 1, 2024. It amended the state's Consumers Legal Remedies Act to require businesses to include mandatory fees in an advertised or displayed price, subject to specified exceptions.

The California Attorney General's hidden-fees guidance describes SB 478 as a price-transparency law, not a price-control law. It generally addresses how a business presents its price rather than deciding what the business may charge.

Food-delivery platforms have special requirements under California law. Voluntary payments to workers, including tips, are treated under other laws. For that reason, a California complaint should identify the exact charge and transaction instead of relying on a broad claim that all service fees are illegal.

Other states may have their own disclosure requirements. Don't assume a California rule applies to a purchase made elsewhere, and don't assume the FTC rule covers ordinary online shopping just because the seller uses a travel or ticketing website.

Airline fees follow a separate framework

Airfare isn't covered by the FTC's short-term lodging and live-event ticket rule simply because you bought it through a travel website. Airline ancillary-fee disclosures are governed separately by the Department of Transportation.

The DOT's Federal Register rule on airline ancillary-fee disclosure is the relevant federal source for that category. Baggage, seat, and change fees can depend on the carrier, fare type, route, and timing.

If you need a checked bag or a particular seat, include that cost when comparing flights. Treat the lowest search-result fare as a starting point until you've checked the airline's fee information for your itinerary.

Where drip pricing commonly appears

The same pattern shows up across industries, but the legal analysis isn't identical in each one.

• Hotels and vacation rentals: A nightly rate may be followed by mandatory resort, destination, cleaning, or service charges. Check whether each fee applies per night, per stay, or per guest.
• Concert and sports tickets: A low ticket price may be followed by mandatory service, facility, order, or delivery fees. The FTC rule addresses upfront total-price disclosure for covered live events.
• Food delivery: Delivery, service, small-order, and regulatory fees can appear at different stages. California platforms have additional statutory requirements.
• Airlines: Baggage and seat charges are often optional, but they can make a low fare impractical for a particular traveler. Price the features you'll actually use.
• Marketplaces and ride apps: Shipping, platform, delivery, or surge-related charges may be shown at different points. The platform's name doesn't determine whether the charge is lawful; the listing, timing, terms, and applicable jurisdiction do.

A later charge is less concerning when it reflects an optional choice or an amount that could not reasonably be calculated until you supplied necessary information. It raises a stronger transparency concern when the fee is unavoidable, material, and missing from the price used to make the comparison.

Why drip pricing works

Most shoppers notice the first number and use it as an anchor. Later charges can feel like small additions even when they substantially change the purchase price.

The checkout process can also create commitment. After entering dates, names, payment details, or seat selections, a shopper may continue rather than start over with another seller. Separating the total into several components makes side-by-side comparisons harder.

Those effects don't prove that a seller violated a law. They are a reason to check the total before spending time on the transaction.

How to spot hidden mandatory fees before buying

Use this check before entering payment details:

1. Set the exact purchase. Enter the dates, quantity, destination, delivery address, and fare or room type you need. A "from" or "starting at" price isn't a quote for your transaction.
2. Look for the total early. Find an all-in or total-price view and read the price details before selecting optional extras.
3. Separate required and optional charges. Turn off insurance, upgrades, seat selection, donations, and other extras to see which amounts remain.
4. Check the unit. A fee may apply per ticket, person, night, item, order, or trip. Multiply it across the entire purchase.
5. Review taxes and delivery costs. Even when a rule permits a government charge or shipping to appear separately, you need the final amount for a fair comparison.
6. Check recurring terms. For a membership or subscription, confirm the renewal price, billing frequency, and cancellation instructions.
7. Save the offer. Take screenshots of the advertised price, fee breakdown, final total, terms, and receipt. Include the date and time if the price can change.

Private browsing may reduce some personalized advertising, but it won't reveal a fee that the seller is required to disclose and doesn't guarantee a stable price.

What to do if a fee appears late

Build a record before making a general accusation:

1. Compare the advertisement, checkout screen, confirmation email, receipt, and final charge.
2. Identify whether the disputed amount was mandatory or optional.
3. Contact the business in writing. Ask what the fee covers, when it was disclosed, and why it wasn't included in the earlier price.
4. Request a specific remedy, such as correcting the charge or refunding an amount that wasn't properly disclosed.
5. Keep copies of messages, chat transcripts, screenshots, and the business's response.

The FTC's consumer guidance on resolving problems with a business recommends making a clear request and keeping records of communications.

An unexpected fee doesn't automatically create a right to cancel or receive a refund. The result may depend on the merchant's terms, the applicable law, whether the charge differed from the amount shown or authorized, and the payment method.

Payment disputes

If you used a credit card and the final charge differs from the price clearly shown or authorized, contact the card issuer promptly and ask whether its billing-dispute process applies. Follow the issuer's instructions and any deadline it provides. An issuer's dispute process isn't the same as a legal finding that the seller used unlawful drip pricing.

Debit cards, prepaid cards, ACH transfers, payment apps, and wire transfers use different procedures. Contact the bank or payment provider quickly, but don't assume the protections or deadlines are the same as those for a credit card.

A complaint to the FTC or a state attorney general can help regulators identify patterns, but it isn't a guaranteed personal refund. For a California transaction, compare the facts with the California Attorney General's hidden-fees information. Airline complaints and disclosure questions should be checked against current DOT requirements.

What a lawsuit does - and doesn't - mean

A lawsuit alleging drip pricing isn't a court finding that every similar fee was unlawful. A case may be pending, dismissed, settled, or limited to a particular group of consumers and purchase dates.

If you receive an official class-action or settlement notice, check:

• The covered product, seller, and transaction dates
• Whether your purchase falls within the defined class
• The claim deadline
• What proof is required
• Whether accepting payment releases related claims

The actual complaint, court order, or settlement notice controls the case. A headline doesn't establish eligibility or create an automatic nationwide refund.

Frequently asked questions

Is drip pricing always illegal?

No. A fee is more likely to raise a legal issue when it's mandatory, material, and disclosed too late or in a misleading way. Optional extras and certain excluded charges may be treated differently. The industry and jurisdiction matter.

Does the FTC rule cover Amazon, Uber, airlines, or every online store?

No. The FTC rule discussed here focuses on short-term lodging and live-event tickets. Other services may be governed by separate federal rules, state laws, contract terms, or general prohibitions on deceptive advertising. The exact price display and fee terms are needed to evaluate a complaint.

Does California SB 478 ban service or resort fees?

No. SB 478 is primarily a transparency law. When it applies, a mandatory fee generally must be included in the advertised price, but specified exceptions and California's food-delivery rules matter.

Can I force a refund because a fee appeared at checkout?

Not automatically. Ask the seller for a correction, preserve the evidence, and check your payment provider's dispute process. A regulator complaint or lawsuit may provide another route, but neither guarantees an individual refund.

What evidence is most useful?

Save the original advertisement, URL or app screen, checkout total, fee description, confirmation email, receipt, payment record, and communications with the business. Showing the price at each stage is stronger than saving only the final receipt.

Before your next purchase, save the first price and the final fee breakdown for the exact item, dates, quantity, and options you need. If an unavoidable charge appears only after you've committed time or payment details, document the change before deciding whether to continue.