Breakthrough Studio · Operator Tools

Is your free shipping threshold set by gut, or by math?

Most founder-run stores pick a round number and hope. There is actual math behind the right threshold, and a real dollar figure on what offering it is worth. We built this because we ran it on our own brands first. Plug in your numbers below.

$
Your typical order total before shipping.
$
Used to scale the impact across a year.
%
Revenue minus COGS, as a percent. This drives the answer more than anything else.
$
Carrier rate plus dimensional weight, residential, and fuel surcharges. Not the sticker rate.
$
Leave blank if you do not offer free shipping yet.
%
For the margin reality check. Best read from your order value distribution.
Adjust the lift assumptions (defaults are industry benchmarks, replace with your own test data)
%
Benchmark studies land at 15 to 30%. The 9.4% default is conservative, from our own brand data.
%
Negative if a higher threshold costs you some conversions. Set to 0 if not modelling it.
What your threshold should be
$0
Margin break-even. Above this, a bigger basket more than pays for the shipping you absorb. Below it, you are subsidising.
Behavioural sweet spot: $0to$0
AOV plus 15 to 25%. The stretch zone where shoppers add one more item to qualify.
Enter your numbers to see a verdict on your current threshold.
What offering it is worth (per year)
$0
Incremental revenue from the AOV lift, net of the conversion change, across your annual order base.

This is a directional model to start the conversation, not a forecast. The revenue figure is top line, not profit. Replace the default lift assumptions with your own A/B test results for a real number.

The math behind it

No black box. Here is exactly what the calculator runs, the same approach we used setting thresholds on our own brands.

1. The break-even threshold (what number to set)

Break-even threshold = AOV + ( shipping cost ÷ gross margin %)

The threshold pays for itself at the point where the extra margin on a bigger basket exactly covers the shipping you now absorb. Because it is driven by margin, a 60% margin brand and a 25% margin brand with the same AOV land in very different places. That is why a flat "add 30% to AOV" rule quietly loses money for thin-margin stores.

2. The behavioural range (where shoppers actually respond)

Sweet spot = AOV × 1.15 to AOV × 1.25

Set it 15 to 25% above AOV and you land in the zone where a customer will add one more item to qualify, without the gap feeling out of reach. Above roughly 30%, adoption falls off a cliff. Sanity-check the break-even number against this range, and where possible place the final threshold just above a natural cluster in your order value distribution.

3. The value of offering it (what it is worth)

Annual impact = AOV lift % × AOV × (1 + conversion change %) × annual orders

The AOV lift raises the average basket, the conversion change discounts that gain for any checkouts a higher bar costs you, and it scales across your year. This is a top-line revenue figure. To read it as profit, apply your margin and subtract the shipping you would absorb on qualifying orders, which is the margin reality check shown in the result.

Why most stores get this wrong

It is not a content problem, it is a math problem nobody runs. The threshold gets set once, by feel, and never revisited as shipping rates, AOV, and margin all move. The brands that get it right are usually the ones that stopped doing everything by hand long enough to look at the numbers.

Ready to get back to working on the business instead of in it?

If you are packing orders at the kitchen table and pricing shipping by gut, that is time you are not spending on the brand. We are a Vancouver 3PL built by brand operators who co-founded Tru Earth and ran this exact playbook. Tell us your brand, your volume, and where you ship, and we will build a fulfillment strategy around how you actually operate.

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