Free-shipping thresholds & volume pricing
"Free shipping over $X" is the most reliable nudge in e-commerce, but only if X is set from your real AOV, not a guess, and the math still leaves you a margin.
Set the threshold a bit above what people already spend, show a progress bar, and check that the free shipping doesn't eat your contribution.
Fastest path: one prompt, end to end
🤖 AI prompt — paste into ChatGPT / Claude
You are a pricing + margin analyst. Use MY numbers only.
Current AOV (average order value): [$]
Average shipping cost I pay per order: [$]
Contribution margin % (after COGS): [%]
Typical products + prices: [list a few]
Do this:
1. Recommend a free-shipping threshold set ~15-25% above my current AOV, and show the arithmetic. Tell me to verify against my own order distribution, not just the average, before locking it.
2. Explain progress-bar mechanics: the "you're $8 away from free shipping" cue, where it appears (cart + mini-cart), and why it lifts basket size.
3. Propose volume / tiered pricing that helps hit the threshold: a 2-pack and 3-pack with modest per-unit discounts. Give example prices from my list.
4. Do a margin check: for the threshold order and each bundle, subtract shipping + COGS and confirm contribution stays positive. Flag anything that goes underwater.
Do not guess my numbers; if AOV, shipping, or margin is missing, ask for it. Do the arithmetic only on numbers I give.
Output: recommended threshold (with math) + progress-bar plan + 2/3-pack prices + margin-check table.
Or do it in 4 steps
- Set the threshold from your AOV, not a round number. Aim roughly 15-25% above your current average order value: high enough to push one more item, low enough to feel reachable. If your AOV is $40, a $50 threshold nudges the add; $75 just gets ignored. Verify against your real order spread before you commit.
- Show a progress bar. "You're $8 away from free shipping" in the cart and mini-cart is the mechanic that does the work. It turns an abstract threshold into a concrete, closeable gap. Without the cue, most shoppers never realize they're one item short.
- Give them an easy way to reach it: volume pricing. A 2-pack or 3-pack at a modest per-unit discount lets a shopper clear the threshold in one click instead of hunting for a second product. Tiered "buy 2 save 5%, buy 3 save 10%" also raises units per order, often cheaper margin-wise than a straight discount.
- Do the margin check. Free shipping isn't free, you're absorbing it. For the threshold order and each bundle, subtract shipping and COGS and confirm contribution stays positive. If a $50 order costs $7 to ship on a thin margin, the threshold may need to rise, or the shipping cost is a separate problem (see the shipping-strategy note under operations for the cost side).
Worked example (labeled): AOV $40, shipping $6 per order, 45% contribution margin. Set the threshold at $50 (25% above AOV).
A shopper at $42 sees "add $8 for free shipping" and adds a $12 item, so the order becomes $54. Margin check: $54 x 45% = $24.30 contribution, minus $6 shipping = $18.30, still healthy, and higher than the $42 order.
A 2-pack of a $28 item priced at $52 (a small discount off $56 for two singles) also clears the $50 bar in one click.
Set the free-shipping bar just above your AOV, show a progress bar to close the gap, offer 2/3-packs as the easy way over, and margin-check every bundle so free shipping never eats your contribution, see the operations shipping-strategy note for the cost side.