Free Shipping Threshold Calculator

How to Set a Free Shipping Threshold

The goal is to find an order value where the gross margin you earn on the products is enough to cover the shipping cost you absorb - and still leave your target margin. The formula is:

Threshold = Shipping Cost / (Gross Margin % - Target Margin %)

For example: $8 shipping, 60% product margin, 20% target net margin = $8 / (0.60 - 0.20) = $20 threshold. Any order over $20 at that product mix will clear 20% margin after absorbing your $8 shipping cost.

Why Free Shipping Works

Shipping fees are the #1 reason for cart abandonment. Offering free shipping above a minimum order value removes this friction while encouraging customers to add more items to qualify - increasing your average order value and covering your shipping cost.

Tips for Setting Your Threshold

• Set your threshold 10-20% above your current average order value to nudge customers to add more
• Round up to the nearest $5 or $10 for cleaner messaging (e.g. "Free shipping on orders over $50")
• Test different thresholds - even small changes can significantly impact conversion and AOV
• Factor in your actual blended shipping cost, not just the cheapest rate you sometimes get