How it works
How to pick the right free shipping threshold
Start with your current AOV
The threshold needs to be 30-40% above your current AOV to drive meaningful behavior change. Too close and you absorb shipping without the lift. Too far and shoppers give up.
Estimate the AOV lift
Use a conservative estimate for your first test. Categories with easy add-ons (beauty, supplements, snacks) tend to see more lift. Big-ticket items see less.
Track qualifying percentage
What share of orders hit the threshold? 30-50% is typical when set well. Below 20% means the threshold is too high. Above 70% means it was already close to AOV and you're leaving money on the table.
Free shipping math, in plain English
Free shipping is a lever, not a law. The math only works if the AOV lift outweighs absorbed cost.
The threshold drives behavior
When shoppers see 'Free shipping over $75' and their cart is at $65, they'll add a $12 item to qualify. That's the mechanism. The closer your threshold is to where shoppers naturally sit, the less behavior change you trigger.
Not all absorbed shipping costs the same
If you ship with USPS Ground at $5 per order, absorbing shipping is cheap. If you're shipping heavy/bulky items at $15+, the math gets tight. Lightweight categories have the most room to offer free shipping.
Display the threshold prominently
Announcement bar, free-shipping progress indicator in the cart, countdown to qualify. The lift disappears if shoppers don't know the rule exists. Shopify apps like Free Shipping Bar (Hextom) make this trivial to add.
Test the threshold quarterly
Set the threshold, run for 30 days, check your actual AOV lift and qualifying percentage in the calculator. If the net impact isn't positive, adjust. Most stores settle on a threshold after 2-3 iterations.
Free shipping competes with premium positioning
If your brand positions on quality and craft, bundling shipping into the price (flat premium shipping, no threshold) can feel more consistent than discount-style free shipping thresholds. Luxury brands rarely use them.
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Questions, answered
30-40% above your current AOV. If AOV is $50, try $65-75. High enough to drive behavior change, low enough that shoppers can reach it with one extra item. Test and adjust quarterly.
Yes. Shipping costs are a common reason shoppers leave at checkout, so free shipping (threshold or otherwise) can lift conversion. The effect is stronger on first-time buyers. For repeat customers, it matters less once they've built trust.
Site-wide announcement bar, free-shipping progress bar in the cart ("Add $12 more for free shipping"), and a mention on product pages near the buy button. Silent thresholds get no lift.
Only if your margins are high enough to absorb the cost on every order. For most stores, a threshold is more profitable. Sitewide free shipping works for premium brands baking it into the price and for heavy-ad-spend DTC brands treating it as acquisition cost.
Yes. Most ecommerce platforms let you set thresholds per shipping zone. International shipping is expensive, so thresholds often double for overseas orders ($75 domestic, $150 international).
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