Free plus shipping: how the model makes money, the funnel math, and the rules that keep it honest

A free plus shipping offer gives the buyer a product for just the shipping fee. The fee covers part of the product and postage, not the ad, so the front end loses money by design. The profit comes from upsells, repeat orders or a disclosed subscription. It works with a product that's cheap to make and ship, an upsell buyers want, and the fee shown next to the word free.

What is a free plus shipping offer?

Free plus shipping, often written free + shipping, is a front-end offer: the product costs nothing and the buyer pays a shipping and handling fee. Books, flashlights, samples and single bottles of supplements are typical candidates, because they're light and cheap to make. After the order, the buyer sees one or more paid offers: more of the same product at a per-unit saving, a companion product, sometimes a subscription.

It's a customer-acquisition model, not a product-margin model. The idea is that a free item lowers the barrier, so more visitors become buyers and each buyer costs less in ads than a full-price customer would. The money comes from what those buyers do next. If they don't buy anything else, the model just pays people to take your product. Here's the shape of such a funnel for a fictional electrolyte supplement, the example used in the rest of this post:

From 10,000 visitors to upsell buyers

Illustrative free plus shipping funnel

1. Visitors10,000
2. Started checkout7.6% of the step before760
3. Claimed the free bottle52.6% of the step before400
4. Took the three-bottle upsell30% of the step before120

Buyers who start the checkout and leave have reasons of their own; our post on checkout abandonment covers them, with a fix for each.

How does free plus shipping make money?

Start with the front end on its own. In the example, the buyer gets one bottle free and pays $9.95 for shipping and handling. Illustrative costs per order:

The bottle loses $1.55 before a single ad dollar is spent, and after the ad each buyer leaves a $15.55 hole. The paid offers that follow the order have to fill it. The first is three more bottles in the same box; the second is a companion product. The profit figures are per taker, after product, extra postage, 4% fees and a 6% refund allowance:

Together the upsells bring $16.70 per buyer against the $15.55 hole: a profit of $1.15 per buyer. Here's the same funnel as one picture, from the average revenue per buyer to what's left:

One free-bottle buyer, across the whole funnel

Average per buyer, illustrative numbers

Revenue per buyer$35.00

Product−$9.75

Pick, pack and postage−$6.60

Payment fees (4%)−$1.40

Refunds and chargebacks (6%)−$2.10

Ad cost per buyer−$14.00

Profit per buyer$1.15

A dollar and fifteen cents per buyer is how the model is meant to work: roughly break even on the first order, then earn on the customer through repeat orders and email. It's also fragile.

• If the three-bottle upsell's take rate falls from 30% to 27%, the profit disappears.
• At a 20% take rate, each buyer loses $2.66.
• If ads cost $17 per buyer instead of $14, each buyer loses $1.85.

What take rates does a free plus shipping funnel need?

The take rate is the share of buyers who accept an offer, and in a free plus shipping funnel it decides everything. Track it per offer and per traffic source, every day, because a small drop moves the whole funnel from profit to loss. Three rules follow from the math.

1. Find your break-even take rate before launch. Take the front-end loss per buyer, subtract what the other offers bring, and divide by the profit per taker. In the example: ($15.55 − $5.27) ÷ $38.10 = 27%. If you can't see yourself beating that, change the offer before you spend.
2. Make the first upsell the obvious next step. More of what they just ordered, at a real per-unit saving, in the same box. It carries the funnel. The upsell funnel guide covers how to script and order the offers.
3. Judge the funnel, not the front end. If your ad platform only sees the $9.95 purchase, it reports a return on ad spend of $9.95 ÷ $14 = 0.71x on a funnel that makes money. On the funnel's $35 of revenue per buyer, the same ads return 2.50x, above the 2.31x this funnel needs to break even. The revenue per visitor guide explains how to judge pages and offers on revenue rather than front-end sales.

Put in your own funnel. Enter the revenue per buyer across the whole funnel as the order value, and the product and shipping costs per buyer:

Calculator

Break-even ROAS and CPA calculator

Your numbers per order. Below the break-even ROAS, every order loses money before fixed costs.

Average order value$Product cost per order$Shipping and fulfillment per order$Payment fees (% of the order)%Refunds and chargebacks (% of revenue)%Other costs per order$

Break-even ROAS

2.31x

Profit per order before ads

$15.15

Contribution margin

43.3%

Break-even cost per order (CPA)

$15.15

ROAS = revenue ÷ ad spend. Refunds are counted as revenue you give back; the product cost and shipping of a refunded order are already spent.

Reset to the example

The break-even cost per order is the most you can pay in ads for one free-bottle buyer: $15.15 here, against the $14 the example pays. That gap of $1.15 is the whole profit, so even a small rise in ad costs makes the funnel unprofitable. RevvyScales' profit tracking (Growth plan and up) subtracts ad spend from a connected Meta account, product costs and gateway fees from revenue, and shows ROAS and margin by campaign (profit tracking).

When does free plus shipping work, and when does it fail?

It works when:

• The product is cheap to make and light to ship, so the fee covers most of the product and postage.
• The first upsell is the natural next step: more of the same at a real saving, or a genuine complement.
• The product is consumable, so buyers who like it reorder, or you have a back end you really sell through: email, repeat offers, a subscription buyers choose.
• Your checkout handles post-purchase offers without asking for card details again.
• You measure revenue per buyer across the funnel, not the front-end sale alone.

It fails when:

• Postage alone eats the fee, because the product is heavy or bulky.
• The upsells have nothing to do with what the buyer just ordered.
• The traffic wants free things, not your product. It shows up as low take rates, refund requests and disputes.
• The terms are hidden. That turns buyers into disputes, and it's where the legal trouble starts.

Is free plus shipping legal? The FTC rules on free offers

Free plus shipping is legal in the US when it's honest, and the FTC has been specific about what honest means. This isn't legal advice; here are the primary sources.

• Conditions at the outset. The FTC's Guide Concerning Use of the Word "Free" says the conditions of a free offer should be stated clearly and conspicuously at the outset, and that terms in a footnote reached by an asterisk don't count (16 CFR Part 251). The shipping fee is a condition of getting the item, so it belongs next to the word free: in the ad, the headline, the video and the button.
• No recovering the cost elsewhere. The same guide says buyers can expect the seller not to recover the cost of the free item by marking up what they pay for, substituting inferior goods or otherwise. A "shipping" fee padded to pay for the product sits uneasily with the word free. If the fee is really the product's price, sell it as a low-price starter instead (see the alternatives below).
• Frequency limits. The guide also says a single size of a product shouldn't be advertised as free in a trade area for more than six months in any 12-month period. An offer that runs all year sits awkwardly with that, so ask a lawyer how it applies to yours.
• "Free trial" has its own meaning. The FTC's guides on guarantee advertising say terms such as "Free Trial Offer" should be used only if you refund the full purchase price at the buyer's request (16 CFR Part 239).

The FTC's consumer advice shows how regulators see the trap. It tells consumers that if they have to pay shipping or fees to get a "free" trial, "it's not really free", and to dispute charges they didn't agree to with their card company (FTC consumer advice). In a 2023 consumer alert, the FTC described a marketer that advertised "free" skin products for a $4.99 shipping and handling fee, then charged people who didn't cancel within 14 or 15 days and enrolled them in monthly subscriptions (FTC consumer alert).

Here's the difference between an honest offer and a trap:

An honest offer and a trap

Clear from the first mentionHonest free plus shipping

• "Free, plus $9.95 shipping" wherever free appears
• The total shown before the card form
• No subscription, or one the buyer ticks, with the price, frequency and how to cancel by the button
• Upsells as separate yes-or-no choices after the order
• A billing descriptor the buyer recognizes
• Refunds by email, without a fight

Built to be missedThe trap

• "FREE" in the ad, the fee only at checkout
• Terms behind an asterisk at the bottom of the page
• Monthly charges after 14 days, mentioned only in the terms
• Pre-ticked boxes that add products or a plan
• Cancellation by phone only, during office hours
• A descriptor nobody recognizes on the statement

What changes when a subscription is attached?

A continuity offer, a new bottle every month until the buyer cancels, can pay back a large front-end loss. It's also where the strictest rules apply.

In the US, the Restore Online Shoppers' Confidence Act makes it unlawful to charge for goods sold online through a negative option feature unless you clearly and conspicuously disclose all material terms before collecting billing information, get the buyer's express informed consent before charging, and provide a simple way to stop recurring charges (15 U.S.C. 8403). The FTC's 2024 "click-to-cancel" amendments to its Negative Option Rule would have added more, but the Eighth Circuit vacated them on July 8, 2025 (Custom Communications, Inc. v. FTC). ROSCA still applies, and so do state automatic renewal laws.

In practice: put the price, how often it bills, when the first charge happens and how to cancel next to the button. Make enrollment a box the buyer ticks, never one that's ticked for them. Repeat the terms in the confirmation email, and let buyers cancel online.

Why do free plus shipping offers attract chargebacks?

A buyer who expected to pay $9.95 and finds a bigger charge, a recurring one or a name they don't recognize on their statement calls their bank, and the FTC's own advice tells them to. Disputes hurt a low-ticket offer twice.

• The fee can outweigh the order. Stripe charges US businesses $15 when a dispute is received, which isn't returned, and another $15 to counter it, which is returned only if you win (Stripe). One dispute on a $9.95 order costs more than the order brought in.
• Ratios count disputes, not dollars. Visa's monitoring program divides fraud reports and disputes by settled card-not-present transactions, so a $9.95 dispute weighs as much as a $200 one. Since April 1, 2026, a US merchant at 1.5% or more, with at least 1,500 fraud reports and disputes in a month, counts as excessive, and processors can act sooner (Visa Acquirer Monitoring Program fact sheet).

The defenses are the honest practices above: a billing descriptor buyers recognize, an itemized confirmation email, and refunds by email without a fight, because a refund costs less than a dispute. The chargeback ratio post explains how each network counts, the reduce chargebacks post goes through the prevention steps, and the billing descriptor post covers what buyers see on their statement.

What are the alternatives to free plus shipping?

If the math is thin, or the fee is really the product's price, a different front end can do the same job with less risk.

The low-price starter is the closest cousin: the buyer pays the same $9.95, you send the same bottle, and nobody wonders what "free" means. A first-order discount depends on a real reference price; the price anchoring post covers what makes one real. For full-price offers, the average order value post compares the levers that raise what each order brings, including a free shipping threshold.

Before you launch a free plus shipping funnel

1. Price the front end with real quotes: product, pick-pack-postage, fees, a refund allowance and a cost per buyer you can defend.
2. Price the upsells and find the break-even take rate. If the first upsell needs a take rate you've never seen, redesign before you spend.
3. Put "free, plus $9.95 shipping" wherever free appears: the ad, the headline, the video, the button and the checkout.
4. Decide on continuity deliberately: none, or the terms by the button, an unticked consent box and online cancellation.
5. Set a billing descriptor buyers recognize and send an itemized confirmation email.
6. Make refunds easy and fast. A refund costs less than a dispute.
7. Track revenue per buyer across the funnel, and judge by profit per buyer, not front-end ROAS.
8. Have a lawyer review the offer, especially if it will run all year.