A shipping strategy that protects margin
Unexpected shipping cost at checkout is the number-one cart-abandonment cause, and under-charging quietly eats your margin.
Know your real per-order ship cost, then pick a model that covers it and still converts. AI can model the options from your numbers; you supply the real shipping and packaging costs, because AI can't know your carrier rates.
Fastest path: one prompt, end to end
🤖 AI prompt — paste into ChatGPT / Claude
You are an ecommerce shipping strategist. Use MY numbers only (invent no carrier rates).
Avg order value (AOV): [$] Gross margin per order: [$ or %]
Typical package: [weight + dims] Avg real shipping cost per order: [$] Packaging cost: [$]
Where I ship: [domestic / +international]
Do this:
1. Compare 3 models for MY numbers: (a) free shipping over a threshold, (b) flat rate, (c) live carrier-calculated rates. For each: what the customer pays, what I absorb, and the margin impact per order.
2. Recommend a free-shipping threshold set above my AOV to lift order value without losing money, and show the math.
3. Flag where each model helps or hurts conversion.
Do not guess my carrier rates; if a number is missing, ask for it.
Output: a 3-model comparison table + recommended threshold with the math.
Or do it in 4 steps
- Know your true per-order ship cost first. Average weight/zone shipping + packaging + any pick-pack. Every model below is priced off this number, so get it wrong and the whole strategy leaks.
- Decide who absorbs it. Baking shipping into the product price ("free shipping") converts best but needs the margin. Charging real rates protects margin but raises abandonment. Most DTC brands land on free-over-a-threshold.
- Set the free-shipping threshold above your AOV. If AOV is $45, a "free over $60" threshold nudges buyers to add an item. That lifts AOV while you only eat shipping on larger, higher-margin orders. Never set it below AOV.
- Show the cost before checkout. Whatever the model, display shipping (or "free over $X") early. The abandonment comes from surprise at the final step, not the cost itself.
Worked example (labeled): AOV $45, real ship cost $8, 55% margin. With "free over $60", a buyer adds a $20 item to hit it, so the order is $65 at about $35 gross.
You absorb $8 shipping and net about $27. That beats the original $45 order's about $25, and you dodge the abandonment risk of charged shipping. Model your own AOV and ship cost before setting the number.
Re-check the threshold whenever carrier rates or your AOV shift.