Yes, a supplement free trial can turn into a recurring charge, and the "free" part often is not free. A trial usually needs your card number so the seller can bill you when it ends, and a "just pay shipping" offer means you are already paying something. Auto-ship is the setting that keeps sending bottles, and billing you, until you cancel.
Most of the offers we audit are one-time purchases, and we say so in each review. But the trial-and-subscription pattern exists, and it is worth knowing what it looks like before you type in a card number.
How do free trials and "just pay shipping" offers work?
The FTC describes a negative option as an arrangement where you are billed unless you say no. In its consumer guidance, it gives the example of agreeing to try a box of products free for a month and then being charged automatically for monthly shipments until you cancel. The seller treats your silence as permission.
The FTC's enforcement policy statement lists the common forms: automatic renewals, continuity plans (periodic shipments until you cancel), and free-to-pay conversions, where a trial for nothing or a nominal fee becomes a paid plan after the trial period. A "just pay shipping" offer is the nominal-fee version.
The FTC's advice on this is blunt: if you have to pay for shipping or fees to get a "free" trial, it is not really free. That is not a reason to panic, only a reason to read the total on the order form rather than the headline.
How do surprise recurring charges happen?
The FTC says problems arise when a business does not clearly explain that it will keep billing you unless you act, or when it makes canceling difficult or impossible. In practice, buyers usually get caught in a few ways:
- A trial deadline that passes quietly. Once the cancellation deadline passes, you may owe for more product and more payments.
- A pre-checked box. The FTC warns that a box already ticked for you can give the company permission to keep charging after the trial, sign you up for more paid products, or share your information.
- An extra offer after the main purchase. The FTC's policy statement notes that in an upsell, you finish one transaction and then get a second pitch for another product. That second pitch can be a one-time add-on or a repeating plan, and the wording decides which.
- A price change. The FTC notes that an automatic renewal can charge more than you paid last time, for example when a promotional rate ends.
The most useful habit is to treat every screen between the sales page and the "thank you" page as part of the price.
What should you read before entering a card?
The FTC says the terms and conditions of a free trial should tell you exactly what you are agreeing to, the length of the trial, and how and when to cancel to avoid being charged. If you cannot find that information, its advice is not to sign up.
Here is a short checklist to run through on the order form:
- Is the amount due today shown in dollars, including shipping and tax where it applies?
- Does the page say "one-time payment", or does it mention a trial, a membership, "auto-ship", "continuity" or "recurring"?
- Are there checked boxes? Read each one and uncheck anything you did not choose.
- Is there a cancellation method and a deadline in plain sight, before you enter the card?
- After you click buy, is there a second offer? Read it before clicking yes. Declining is usually a small link, not the big button.
- Take a screenshot of the order page and save the receipt email.
The FTC also points out that some online ads come from affiliate marketers, who are paid when you click, so the ad is not always a reliable description of the offer. That applies to our own site too, which is why we read the real order form where we can and say what we found.
What do our reviews say about trials, subscriptions and add-ons?
Where we reached the order form, we record what it showed. A few real examples, all from published reviews:
- The Gluco Extend review notes that the FAQ describes a one-time payment with "no auto ship subscriptions or hidden charges", and that the checkout page we reached did not contradict it.
- The iGenics review records that the checkout offered a one-click upsell to add a second bottle for a free third bottle, which changes the total charged on the spot.
- The LeanBiome review records an optional paid "Shipping Insurance" add-on on the order form that can be declined without affecting the order.
- The Spartamax review notes an exit-intent offer and two cross-sold digital guides on the order page.
None of these is a trial or a subscription. They show the layer of small decisions on an order form, which is where a pre-checked box or a repeating plan would sit if one existed. Our how we review page explains what we check and what we cannot see from outside the checkout.
How do you cancel and get money back?
The FTC advises looking up the company running the subscription and following its cancellation instructions, keeping a copy of your request and notes on any conversation, and watching your statements for charges after you canceled. Do the cancellation in writing where you can, so you have a date.
For a refund, the route depends on the seller. Products sold through ClickBank are handled by ClickBank support, and our ClickBank refund guide walks through the steps, including asking to cancel any repeat shipment in the same ticket. For Digistore24 orders, use our Digistore24 refund guide. If an extra offer was accepted after checkout, it can show up as a separate order, so list every order number in your request.
What if the seller keeps charging you?
The FTC says that if you are charged without your consent and the company will not refund you, you can dispute the charge, also called a chargeback, with your credit or debit card company right away. Do it online through your card account or by phone, and follow up in writing.
For credit cards, the FTC explains the billing error process: write to the issuer at the billing inquiries address so the letter reaches them within 60 days after the first bill with the error was sent to you. The issuer must acknowledge the letter within 30 days and resolve the dispute within 90 days. While it investigates, you can withhold payment on the disputed amount.
The FTC also says you can report problems canceling, or charges you never agreed to, to ReportFraud.ftc.gov and to your state attorney general. Keep every letter, note and email, since they help show you are owed a refund.
What does the FTC require from sellers?
The FTC's enforcement policy statement says its negative option cases primarily rely on Section 5 of the FTC Act, the Restore Online Shoppers' Confidence Act (ROSCA) and the Telemarketing Sales Rule. Its four basic Section 5 expectations start with clearly and conspicuously disclosing the material terms of a negative option offer. The FTC's consumer guidance adds that before a business gets your card information, it has to tell you how to cancel, and that canceling must be simple.
One caution: the rules are in motion. The FTC's Negative Option Rule page lists a 2024 "click-to-cancel" final rule, and then a February 2026 notice to conform the rules to federal court decisions and a March 2026 request for public comment. We are not lawyers, so treat this as a general picture and not a statement of what applies to your order. The core idea has not changed: material terms must be disclosed clearly, and you should not be billed without clear consent.
FAQ
Is a supplement free trial really free?
Sometimes the product is free but you pay shipping, and often a card is required so you can be charged when the trial ends. The FTC says that if you pay shipping or fees for a "free" trial, it is not really free.
Are all supplement sites auto-ship?
No. Many of the offers we review are one-time payments, and each review says what the sales page states about subscriptions. Always check the order form for your own purchase, because the terms shown there are the ones that count.
How do I stop auto-ship?
Follow the seller's cancellation instructions, keep proof of your request, and watch your statements. If charges continue, contact your card issuer to dispute them. If you are unsure about a product you take, talk to a doctor or pharmacist before stopping or switching.
What is the difference between a refund and a chargeback?
A refund is a request to the seller or its payment processor. A chargeback is a dispute you file with your card company. The FTC suggests a chargeback when you were charged without consent and the company will not refund you.
This article is general information, not legal or medical advice.
Put it into practice
Every DoseAudit review applies these checks to a real product: the label against the research, the true monthly price and the refund terms.
Sources
- Getting In and Out of Free Trials, Auto-Renewals, and Negative Option Subscriptions | Consumer Advice
- Enforcement Policy Statement Regarding Negative Option Marketing (FTC)
- Negative Option Rule | Federal Trade Commission
- Using Credit Cards and Disputing Charges | Consumer Advice
- Restore Online Shoppers' Confidence Act | Federal Trade Commission
This guide is general information, not medical advice. Talk to a doctor or pharmacist before you start a supplement. DoseAudit may earn a commission from affiliate links in reviews; it never changes a verdict. See affiliate disclosure.
More guides
The real monthly cost of a supplement: how to work it out
A simple formula and a worked example for the true monthly cost of a supplement, including bundles, shipping, tax, add-ons and subscriptions.
RefundsSupplement money-back guarantee: what to check before you buy
Window length, empty bottles, return shipping, and sales page versus order form: the refund checks to make before you order a supplement.
Red flagsFake doctors and testimonials on supplement sales pages: how to spot them
Unnamed doctors, stock-photo testimonials, fake timers and dramatized stories: how to check each one in minutes, and what the FTC says.