Free Shipping: When It Actually Makes Sense (and When It's Bleeding You Dry)

No word sells in ecommerce like "free", and no free convinces like free shipping. The data is consistent: shipping cost is the number-one cause of cart abandonment, and the free-shipping promise raises conversion measurably in almost any store. That's the case in favour.

The case against is just as simple: shipping is never free — only who pays for it changes. Absorb it without calculating and every small order eats your margin, and the promotion that filled you with sales emptied your cash. This article runs the full calculation: when it pays, where to set the threshold, and what to do when the margin doesn't stretch.

The prior calculation: three numbers before promising anything

Before deciding your shipping model you need three numbers of your own — not industry averages:

1. 01Your real shipping cost per order: the courier's rate plus packaging, averaged over your real delivery zones. In LATAM it varies enormously by city — the detail is in ecommerce logistics and shipping.
2. 02Your average gross margin per order: what's left of the ticket after product cost, gateway fee and packaging.
3. 03Your current average ticket: the mean order value of the last 90 days, not the ideal order's.

The four models, with their numbers

For the great majority of small stores, the winner is the second: free above a minimum. It converts nearly as well as fully free, but it turns the cost into a lever: the customer close to the threshold adds one more product to reach it, and that extra product usually pays the whole freight.

Where to set the threshold: the practical formula

A badly placed threshold cancels the model: too low and you give away freight on orders that would have happened anyway; too high and nobody reaches it, so all you communicated is that your shipping is expensive.

• Starting point: 20-30% above your average ticket. With a $35 ticket, the healthy threshold sits between $42 and $46 — reachable with one more product.
• Round to a memorable figure: $45 or $50, not $43.70. The threshold is a message, not just a number.
• Check it against margin: on a threshold-sized order, your margin must cover the freight comfortably. If not, the threshold goes up.
• Show it with a progress bar in the cart: "$8 away from free shipping" is among the best-measured ticket-lifting messages there are.
• Review it every six months: if 80% of orders already clear it, it's too low and can rise; if under 20% reach it, it's too high.

Why it works: the psychology of freight

Understanding the mechanism prevents misusing it. The customer doesn't hate paying $4 — they hate paying $4 for nothing. The product is value; freight reads as a toll. From that follow the presentation rules:

• Adding $3 to the price and gifting the shipping converts better than a lower price plus $3 freight, even when the total is identical. It isn't logical; it's human.
• Earned "free" shipping is enjoyed: reaching the threshold feels like an achievement, not an avoided expense.
• The late surprise destroys everything: freight appearing at the last step turns a purchase into an abandonment — the full mechanism is in a better checkout.
• "Free shipping" as a permanent label loses force: when everything is always free, it stops being an argument and becomes wallpaper. The price already absorbed it and nobody thanks you.

When NOT to offer free shipping

• Heavy or bulky product: furniture, appliances, big boxes. Real freight is so high that absorbing it destroys either the price or the margin. Here you charge at cost and explain.
• Gross margin under 40%: there's nowhere to take the freight from without raising prices to uncompetitive levels.
• A very low average ticket with no realistic way to raise it: gifting $4 of freight on $12 orders has no arithmetic that saves it.
• Delivery zones with extreme costs: nationwide free shipping that loses $15 per order in distant provinces gets fixed with a zone-differentiated threshold, not heroism.
• To compensate for a store that doesn't convert: if the problem is trust, photos or checkout, free shipping is an expensive discount that doesn't fix the cause.

Alternatives when free doesn't add up

• Free pickup at your premises or a collection point: zero freight, traffic to your location, and the "free" option exists at no cost. The unjustly forgotten favourite.
• Free shipping only on high-margin products: selective by product, not by store. Anchor products wear it; thin-margin ones don't suffer it.
• A subsidised flat rate: charge $2 where it costs $4. The customer perceives fairness, you cap the loss.
• Free for repeat customers or members: turns freight into a retention tool instead of an acquisition one.
• Seasonal free shipping with a date: "free shipping until Sunday" as a measurable campaign, not a permanent state.