What is Shipping Cost?
Shipping cost is the total expense of delivering a product from warehouse to customer, including carrier charges, packaging, and any zone or weight surcharges. For ecommerce businesses, shipping is both a cost center and a conversion lever, free shipping thresholds are one of the most effective tools for increasing average order value. Plan stock purchases with the Bulk Order Calculator and build product prices with the Product Configurator.
The Formula
Shipping Cost = Base Rate + (Package Weight ร Per Kg Rate) + Distance/Zone Surcharge
Carriers often use dimensional weight (L ร W ร H รท 5000) if greater than actual weight.
Worked Example
A 5lb package shipped US domestic: base rate $3.50, per-lb rate $0.55, no zone surcharge.
- Base rate = $3.50
- Weight charge = 2 ร $1.20 = $2.40
- Zone surcharge = $0
- Total shipping cost = $3.50 + $2.40 = $5.90
๐ Shipping cost of $5.90 per parcel. On a $30 average order, that's 19.7% of order value, highlighting why free shipping thresholds at $40+ are so common.
Why This Matters
Conversion impact
Unexpected shipping costs are the #1 reason for cart abandonment (48% of cases). Displaying shipping costs early or offering free shipping above a threshold reduces abandonment by 15-25%.
Free shipping strategy
Setting a free shipping threshold 20-30% above your average order value encourages customers to add items. A $40 threshold on a $30 AOV typically increases AOV by 15-20%, more than covering the shipping cost.
Carrier diversification
Relying on a single carrier exposes you to rate hikes and service disruptions. Stores using 2-3 carriers reduce average shipping costs by 10-18% by routing each parcel to the cheapest option for its weight, dimensions, and destination zone.
Common Mistakes
โ Using actual weight instead of dimensional
A large, light package (e.g., pillows, lampshades) is charged by dimensional weight. A 50ร40ร30cm box weighing 1kg has a dimensional weight of 12kg, you'd be charged for 12kg, not 1kg. Always check both.
โ Not negotiating carrier rates
Carrier rate cards are starting points, not fixed prices. Businesses shipping 50+ parcels/week can typically negotiate 15-30% discounts. Get quotes from multiple carriers and use them as leverage.
โ Ignoring packaging optimization
Oversized boxes filled with void fill increase dimensional weight charges. Right-sizing packaging to fit products snugly can reduce shipping costs by 10-15% per parcel by lowering the billable dimensional weight.
Industry Benchmarks
| Category | Good | Average | Poor |
|---|---|---|---|
| Shipping as % of order value | Below 5% | 5-10% | Above 12% |
| Free shipping threshold lift | Increases AOV 15%+ | 5-15% | No measurable lift |
| Delivery time (domestic) | 2-3 business days | 4-6 business days | Above 7 business days |
Source: Shopify Commerce Trends Report
Benchmark data sourced from Shopify Commerce Trends Report.