What the numbers say
An order at $31.06 weighs about 3 lb packed, so its label costs $12.12 at USPS's Zone 5 commercial price. Charging the 1 lb label ($9.29) and shipping free differ by $8.55 per order.
Free shipping on every order keeps $3.18 per order against $11.73 when shipping is charged. To earn the same per visitor it has to bring 268.9% more buyers.
A threshold only adds something above the average order. An order that tops up from $31.06 to $45.19 with more of the same goods and ships free keeps $11.73, against the $11.73 the average order keeps with shipping charged. That is the break-even: a lower threshold loses money on every order that tops up to it, and at $50.00 each top-up earns $2.91 more.
Those two orders are costed in the average order's parcel, at the same gross margin; a top-up heavy enough to need a larger label raises the break-even. And every order already above the threshold stops paying its $9.29 of shipping and buys nothing extra. The free-shipping threshold calculator counts both sides with your own order values.
The cost structure, and where it comes from
| Price | $31.06, the average order. BARK, fiscal fourth quarter and full year 2026 results, read 23 September 2026 |
|---|---|
| Unit cost | $9.81. From the reported gross margin: “DTC gross margin expanded 230 basis points year-over-year to 68.4% (excluding BARK Air) · Average order value $31.06” BARK, fiscal fourth quarter and full year 2026 results, read 23 September 2026 |
| Pick and pack | $3.20 per order and $0.48 for each extra item. Fulfill.com, 3PL pricing benchmarks (The Fulfillment Advisor 2025 survey of 600+ warehouses), read 23 September 2026 |
| Shipping label | USPS Ground Advantage, commercial, Zone 5, by weight rounded up to the pound: 1 lb $9.29 · 2 lb $10.50 · 3 lb $12.12 · 4 lb $13.89 · 5 lb $14.53. Packed weight is an assumption: 3 lb per order. USPS Notice 123, USPS Ground Advantage Commercial, Zone 5 (effective 4 October 2026), read 13 October 2026 |
| Card fees | 2.9% + $0.30 per order: Shopify Payments' online rate for a standard card on the Basic plan in the United States. Higher plans pay a lower rate, and premium cards a higher one. Shopify's pricing page for the United States, online standard card rates, read 12 October 2026 Rates by plan and country |
| Refund reserve | 5%, Offer Suite's default assumption for consumables. NRF's all-category figure for online sales is 19.3%, but consumables are rarely returned; use your own rate. |
| Gift | A toy: unit cost $3.16, retail $10.00. A $10 toy, costed at BARK's reported direct-to-consumer gross margin. |
The offer, as an agent writes it
An agent writes this offer as one document for Offer Suite's API, validated against the offer schema. Below is one option of it: what the buyer gets and the price it promises. Offer Suite checks with a real cart that checkout charges exactly the prices above.
Show one option 1 option · excerpt
{
"key": "order",
"display": {
"title": "Free shipping"
},
"lines": [
{
"role": "main",
"quantity": 1,
"purchase": {
"type": "one_time"
}
}
],
"pricing": {
"promise": {
"firstChargeCents": 3106,
"renewalChargeCents": null
}
}
}How Offer Suite validates, versions and publishes a document like this one: offer documents.
Questions
Is free shipping profitable for pet brands?
Shipped free, an average order of $31.06 keeps $3.18 on these costs, $8.55 less than with the $9.29 label charged. It pays for itself if it brings 268.9% more buyers.
What free-shipping threshold should pet brands set?
Above $45.19 on these costs: an order that tops up to less keeps less than it kept paying for shipping. At $50.00, each top-up earns $2.91 more.