The problem with free shipping on every order
Most founders treat shipping policy as a marketing choice. Free shipping on everything feels generous. And generous feels like growth.
But shipping is a flat cost. The box. The pick. The postage. They cost about the same whether the customer buys one candle or four. Your percentage costs shrink with a small cart. Shipping does not.
That draws a line in your order list that no report shows you. Below a certain cart value, every order loses money. Orders under that line do not just earn less. They take profit away from the orders above it. And free shipping hides the whole thing.
This article is about the fifth one: shipping and warehouse fees. Shipping is a flat, per-order cost, the same $12 on a $25 cart as on a $100 cart. That flat fee is what sinks small orders. A well-placed free-shipping threshold is the fix.
1. An example showing you the numbers
Say your store sells artisan soy candles. A single candle in an amber jar goes for $25. Your best seller is the four-candle gift box at $100. Both ship in a similar small kraft box. So both cost you the same $12 in shipping and 3PL fees.
You offer free shipping on every order. You pay for it. Now put the two orders side by side, with all six costs counted. See who really pays for that gift.
One candle versus the gift box, same shipping, opposite result
Per order, whole dollars, house rates throughout (see appendix). Small-cart percentages rounded to whole dollars.
| Line item | Single candle ($25 cart) | Gift box ($100 cart) |
|---|---|---|
| Selling price | $25 | $100 |
| Product cost (COGS) | -$10 | -$40 |
| Standing discount (10%) | -$3 | -$10 |
| Advertising to get the buyer | -$20 | -$20 |
| Shipping and 3PL | -$12 | -$12 |
| Refunds (5%) | -$1 | -$5 |
| Payment and channel fees (3%) | -$1 | -$3 |
| What is left per order | -$22 | +$10 |
Read the bottom row. The gift box keeps $10 once every cost is paid. The single candle loses $22. The $12 of shipping plus the $20 of ads cost more than the whole cart. The percentage costs shrank with the order. The two flat fees did not.
Now scale it. Take 20,000 orders a year. One order in five is a single candle. That is 4,000 losing orders. At $22 each, $88,000 of profit quietly drains away. Your gift-box customers pay for it.
One honest note. Your break-even cart is yours alone. It moves with your shipping cost, your ad cost, and your margins. A repeat customer who came free through email is one thing. A small order you paid $20 in ads to win is another. Typical ranges sit in the appendix. The one-hour exercise below finds your own line.
The sentence that changes how you think about free shipping
Free shipping is not free. On small carts, you are paying customers to take the product away.
Every order below your ships at a loss. Your good orders cover it. A bar set at the break-even line turns that free ride into a choice: add to the cart, or fund the postage.
2. How to set your free-shipping threshold
This is a one-hour exercise once you know your per-order costs. The output is one number, the cart value where an order starts paying for itself. Then build your shipping policy around it.
- Split your costs into two piles. Pile one scales with the cart: product cost, discounts, refunds, payment fees. Pile two stays flat per order: shipping and 3PL, and advertising. On this store the flat pile is $32 per order, $12 shipping plus $20 ads.
- Work out what each cart dollar keeps. Take a $100 order. Take away the scaling costs: $40 product, $10 discount, $5 refunds, $3 fees. That leaves $42 of every $100. So 42 cents of every cart dollar is left to cover the flat pile.
- Find your break-even cart. Divide the flat pile by what each dollar keeps. $32 divided by 0.42 is about $76. Below a $76 cart, this store loses money on the order. Your numbers will differ. The method will not.
- Set the bar at break-even or a touch above. Call it $80 here. Orders at or above it ship free. Orders below it pay a shipping fee. Do not set the bar more than about a third above your average cart. Push too hard and shoppers walk away instead of adding.
- Announce it, test for 30 days, then re-check quarterly. Tell customers before they reach checkout. Track three numbers: average cart, order count, and shipping fees collected. Judge the change on total profit, not on any single number. Then re-run the math every quarter. Shipping and ad costs drift.
3. One warning before you act
A losing small order is not always a bad order. Do single-candle buyers come back month after month? Then the first-order loss is the cost of winning a new customer. It may be a fine cost. Check the repeat rate of your small-cart customers before you change anything. It is a ten-minute question for your accountant.
Repeat orders also change the math. A small top-up from an email subscriber carries no ad cost. So its break-even cart is far lower, about $29 on this store. Are most of your small carts loyal repeat buyers? Then soften the policy. Charge shipping below the bar instead of blocking the order. Let loyalty offers do the rest.
4. Frequently asked questions
Won't a threshold scare customers away?
Some shoppers below the bar drop off. Most add an item or pay the fee. Set the bar a bit above the average cart, and the average cart usually rises by about the same amount. Set the bar too high and drop-off climbs faster than the add-ons. That is why you test for 30 days first.
Should I block small orders completely?
Almost never. Charge shipping on them instead. The customer still gets the candle. You stop funding the postage. And today's small buyer may be next year's gift-box buyer. A hard minimum order value belongs in wholesale, not in your store.
Isn't the real problem my ad spend, not my shipping?
They share the blame. Both stay flat while the cart shrinks. But shipping policy is yours to change at checkout today. No agency needed. Ad spend is its own project. Another article in this series covers it.
Isn't this just the free-shipping threshold trick for raising cart size?
Same tool, two jobs. Elsewhere in this series we show how a threshold lifts the average cart. This article sets where the bar must sit for that lift to land as profit: at or above your break-even cart. A bar below break-even only moves the loss around.
5. Quick reference: what to avoid and apply
What to avoid
- Giving free shipping on every order without knowing your break-even cart.
- Treating shipping policy as marketing when it is a math choice.
- Setting the bar by gut feel or by copying a bigger brand.
- Placing the bar more than about a third above your average cart.
- Setting the policy once and never re-checking as costs drift.
What to apply
- Split your costs into scaling (product, discount, refunds, fees) and flat (shipping, ads).
- Work out how much of each cart dollar survives the scaling costs.
- Divide the flat costs by that number to find your break-even cart.
- Set free shipping at or just above break-even; charge shipping below it.
- Test for 30 days on total profit, and re-run the math every quarter.
Want your six costs mapped for you?
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Definitions, modeling notes & rate-basis disclosures
Definitions
- The six profit levers
- (1) Discounts, (2) Refunds, (3) Product cost (landed COGS), (4) Sales channel and payment fees, (5) Shipping and 3PL fees, (6) Advertising spend.
- Free-shipping threshold
- The cart value at or above which shipping is free. Below it, the customer pays a shipping fee.
- Minimum Order Value (MOV)
- The smallest order a store will accept. The hard version of a threshold, more common in wholesale than in consumer stores.
- Break-even cart
- The cart value where an order exactly covers all six costs. Above it, orders make money. Below it, they lose money.
- Flat per-order costs
- Costs that do not shrink with a smaller cart. In this series: shipping and 3PL ($12) and advertising ($20).
- Average Order Value (AOV)
- The average dollar size of one customer order.
- Contribution per order
- Selling price minus all six costs. What one sale really leaves behind.
Modeling notes
- This article uses the series' standard teaching store: a $100 order with product cost of $40 (40%), a standing 10% discount, advertising of $20 per order, refunds of 5%, payment and channel fees of 3%, and shipping and 3PL of $12. Contribution on the $100 cart: $10. This article varies the cart size, not the rates.
- Small-cart reconciliation: $25 − $10 COGS − $3 discount (10%, rounded up from $2.50) − $20 ads − $12 shipping − $1 refunds (rounded from $1.25) − $1 fees (rounded from $0.75) = −$22.
- Break-even: the four scaling costs take $58 of every $100 of cart (40 + 10 + 5 + 3), leaving $42 per $100 to cover $32 of flat costs. $32 ÷ 0.42 ≈ $76 for a new customer; with no ad cost (repeat order), $12 ÷ 0.42 ≈ $29. Yearly figure: 4,000 small-cart orders (one in five of 20,000) × $22 = $88,000.
- Working ranges, for context only: store break-even carts commonly land anywhere from $30 to $90 depending on margins and ad model. Thresholds set 15% to 30% above the average cart typically lift the average cart 15% to 30% (Shopify and Capital One industry data). Your store's numbers set your bar.
Rate-basis disclosures
- Product baseline: artisan soy candles, single candle $25, four-candle gift box $100, same packaging profile.
- House rates held on both carts: COGS 40% of price, standing discount 10%, refunds 5%, payment and channel fees 3%, advertising $20 per order, shipping and 3PL $12 per order.
- Break-even cart on these rates: about $76 for an advertised new customer; about $29 for a repeat order with no ad cost.
- Suggested policy for this store: free shipping at $80 and above; below $80 the customer pays the shipping fee.
- All figures rounded to whole dollars for easy reading.