How to set up carrier methods
Carrier Methods are the shipping options shown at checkout. Each carrier method contains:
- A name that customers see on the checkout page
- A base rate
- A minimum charge
- Extra fees (surcharges)
- Shipping time (ETA)
- A DIM factor for calculating dimensional weight
Steps
#1. In Shopify Admin → open Apps → MP Smart Shipping & Batching
#2. Go to Carrier methods
#3. Click Add new method
#4. Fill in:
- Display name: For example, “Express Delivery”
- Code: Pre-filled, but you can edit
- Status: Turn ON if you want customers to see it
#5. Enter Base rate (required)
#6. Add Min charge (optional)
#7. Turn ON Charges options to add surcharges
#8. Set:
- ETA min/max
- DIM factor (or use the global default)
#9. Click Save
For example:
- Express Delivery
- Base rate: $2.00 per BW (billable weight)
- Min charge: $10.00
- Extra handling: $3.00 surcharge
If an order’s billable weight = 3.5kg → Shipping = max(3.5kg x $2 = $7, Min charge $10) + $3 surcharge = $13
This is exactly how the app calculates fees at checkout.