Why carrier-calculated shipping matters
It’s the accurate answer: every order pays what it truly costs to ship, so the store never eats a whale order or overcharges a light one. The trade is exposure: real rates can be high, and the shopper sees them.
What live rates depend on
- Accurate product weights and dimensions in the catalog
- Package assumptions: how orders combine into boxes
- Negotiated carrier accounts feeding your discounts, not list rates
- Fallback rates for when the carrier API doesn’t answer
Questions
Why do quoted rates sometimes mismatch the label cost?
Garbage in: missing dimensions, wrong box assumptions, or dimensional-weight surprises. The quote is only as true as the product data behind it.
Should stores mark live rates up or down?
Small adjustments are common: a slight discount as a conversion nudge, or a handling margin covering materials. Keep the shown options few and honestly labeled; a wall of eight services helps nobody.