Am I losing money offering free shipping?

Last updated: June 27, 2026

You are losing money on free shipping whenever your average order value sits below your free shipping break-even AOV, which equals your blended shipping cost divided by your contribution-margin percentage. Above that AOV, free shipping eats a slice of margin you can afford. Below it, every shipped order leaves the warehouse underwater.

That single number ends the usual hand-wringing. Most advice says whether free shipping pays "depends." It does not depend. It has an exact break-even order value, and you can compute yours in two lines of arithmetic. The rest of this post shows the formula, runs it on a real product, and draws the line between free shipping as a marketing cost worth paying and free shipping as a silent margin leak.

What does losing money on free shipping actually mean?

Losing money on free shipping means the contribution margin on an order is smaller than the blended shipping cost you absorb to fulfill it, so the order ships at a loss before any overhead. Free shipping is never actually free. Someone pays the carrier, and when the customer does not, the cost comes straight out of your per-order contribution.

Contribution margin is the dollars left from a sale after the costs that scale with that sale: cost of goods, payment processing, pick-and-pack, and shipping. Free shipping moves the shipping line from the customer's column into yours. If the order still clears positive contribution afterward, free shipping is a discount you chose to give. If it goes negative, free shipping is a leak that no month-end report will flag in time to stop it.

The free shipping break-even formula

Free shipping becomes margin-neutral at one exact average order value: blended shipping cost divided by contribution-margin percentage. Below that AOV, free shipping turns contribution negative. At it, free shipping costs you exactly your entire margin. Above it, you keep the difference.

Here is the formula in plain terms.

Break-even AOV = Blended shipping cost / Contribution-margin %

Two inputs do all the work:

• Blended shipping cost: your real average outbound cost per order across every zone, weight, and carrier, not the cheapest label or the published rate. Pull last quarter's total outbound shipping spend and divide by orders shipped.
• Contribution-margin percentage: contribution margin (price minus COGS minus payment fees minus variable fulfillment) divided by price, before shipping is added.

The logic is simple. Contribution margin percentage tells you how many cents of every order dollar survive to cover shipping. If 56 cents of each dollar survive and a shipment costs $7.10, you need enough order dollars for those surviving cents to reach $7.10. That is $7.10 divided by 0.56, and that is your break-even AOV.

Worked example: an artisan soy candle three-pack at $42

Take an artisan soy candle three-pack that sells for $42, and walk it all the way down to dollars left.

Line	Amount
Price	$42.00
Cost of goods (wax, jars, wicks, boxes, labels for three)	-$16.80
Payment fee (2.9% + $0.30)	-$1.52
Contribution before shipping	$23.68
Blended shipping absorbed (free shipping)	-$7.10
Dollars left	$16.58

The math, step by step. Price minus COGS minus payment fee gives contribution before shipping: 42 minus 16.80 minus 1.52 equals $23.68. That is a contribution margin of 23.68 divided by 42, or 56.4 percent. Now the break-even AOV: blended shipping of $7.10 divided by 0.564 equals $12.59.

So this candle three-pack breaks even on free shipping at an order value of $12.59. The actual order is $42, more than three times the threshold. Free shipping consumes $7.10 of the $23.68 contribution, which is exactly 30.0 percent of contribution, and still leaves $16.58 on the order. Here free shipping is a marketing cost worth paying. It buys a cleaner checkout and a higher cart, and you keep two thirds of your margin.

Now change one thing. A customer buys a single $18 candle instead of the three-pack, with COGS of $9.50 and the same $7.10 blended shipping. Contribution before shipping is 18 minus 9.50 minus 0.82, which is $7.68, a 42.7 percent margin. Break-even AOV jumps to 7.10 divided by 0.427, or $16.64. The $18 order clears it, but barely: after the $7.10 shipment, only $0.58 is left. One return, one reshipped lost parcel, one address correction, and that order is underwater. That is the silent leak. The order looks fine on the sales report and bleeds on the P&L.

When is free shipping a marketing cost versus a margin leak?

Free shipping is a marketing cost worth paying when your AOV sits comfortably above your break-even AOV and the offer demonstrably lifts conversion or cart size. Free shipping is a margin leak when a meaningful share of orders ship below break-even AOV, because those orders quietly convert your best-looking sales into your worst-performing ones.

The break-even AOV gives you the test, but the distribution of your orders gives you the verdict. An average comfortably above break-even hides nothing if a third of orders fall below it. Pull your order-value histogram and mark the break-even line on it. The percentage of orders to the left of that line is the percentage that ships at a loss under blanket free shipping.

Three patterns decide the call:

1. Almost every order clears break-even by a wide margin. Free shipping is cheap marketing. Offer it site-wide and move on.
2. Orders cluster on both sides of the line. Set a free shipping threshold just above break-even AOV so small carts pay their own freight while large carts get the perk. The mechanics of picking that threshold are in how to set a free shipping threshold that protects margin.
3. Most orders fall below break-even. Blanket free shipping is a leak. Either raise prices, raise the threshold sharply, or charge for shipping and lean on speed and reliability instead. The trade-off between eating the cost and passing it on is laid out in absorb versus pass through shipping cost.

The Agentis figure: 30 percent of contribution, gone per order

Run the candle three-pack numbers and one figure stands out. Free shipping consumed $7.10 of $23.68 contribution, which is 30.0 percent of the margin on that order, computed as 7.10 divided by 23.68. On a healthy order that is a tolerable marketing spend. Spread across thousands of thinner orders sitting near their break-even AOV, that same 30 percent is the difference between a profitable quarter and a confusing one.

The break-even AOV is a clean number on one product. Across a live catalog with mixed carts, promo codes, and oversized SKUs, your blended shipping cost and contribution margin shift order by order, and the break-even line moves with them. That is where free shipping leaks: not in the average, but in the orders that drift below a line nobody is watching in real time.

Agentis is a real-time profit governance platform for high-volume Shopify Plus and ShopLine merchants. It monitors margin at the order and SKU level and flags or blocks unprofitable activity before it reaches the P&L. Profit governance is the practice of monitoring and enforcing margin rules in real time across every order, SKU, and channel, so unprofitable activity gets caught and corrected as it happens instead of discovered in a month-end report. For free shipping, that means the order that ships below its break-even AOV gets caught on the day it happens, not in a quarter-end variance review.

Frequently asked questions

How do I calculate my free shipping break-even?

Divide your blended shipping cost per order by your contribution-margin percentage. If shipping averages $7 per order and your contribution margin is 50 percent, your break-even AOV is $14, meaning any order below $14 ships at a loss under free shipping. Use your real blended shipping number, not the cheapest label.

What is a blended shipping cost?

Blended shipping cost is your true average outbound shipping spend per order across all zones, weights, and carriers. Take total outbound shipping spend for a period and divide by the number of orders shipped in that period. It is almost always higher than the lightweight, single-zone rate merchants quote themselves, which is why break-even math built on the cheap rate understates the real threshold.

Should I offer free shipping or set a threshold?

Set a free shipping threshold whenever a meaningful share of your orders fall below your break-even AOV. A threshold set just above break-even lets large carts enjoy free shipping while small carts cover their own freight, protecting margin without killing the conversion benefit. If nearly every order already clears break-even comfortably, site-wide free shipping is simpler and safe.

Does free shipping increase average order value?

Free shipping can lift average order value when it is paired with a threshold, because customers add items to reach it. Blanket free shipping with no threshold gives shoppers no reason to grow the cart, so it tends to raise conversion without raising AOV. The threshold is the lever that turns the offer into an AOV driver rather than a flat discount.

How do I find which orders are losing money on free shipping?

Compute your break-even AOV, then pull your order-value distribution and count every order below that line. To go further, calculate true net margin per order including the actual shipping label paid, since blended averages hide the worst cases. The full method is in how to calculate your true net margin per order, and label-cost variance is covered in what a Shopify shipping label really costs.

Next step you can take today: pull last quarter's total outbound shipping spend, divide by orders shipped to get your blended shipping cost, divide that by your contribution-margin percentage, and mark the resulting break-even AOV on your order-value histogram. The orders left of that line are the ones costing you money.