Overview
An Adjustment modifies the price of an Order, a Line Item, or a Shipment. Adjustments can be positive (charges) or negative (credits). Key relationships:- Adjustment modifies prices on orders, line items, or shipments
- Source is where the adjustment comes from (Tax Rate or Promotion Action)
- Adjustable is what’s being adjusted (Order, LineItem, or Shipment)
- Positive amounts are charges, negative amounts are credits
Adjustment Types
Included vs Additional
- Included adjustments are part of the item’s displayed price (e.g., VAT in European stores)
- Additional adjustments are added on top of the item’s price (e.g., US sales tax)
Sources
Adjustments are created by two sources:Adjustment Attributes
Adjustment Lifecycle
- Open adjustments are recalculated whenever the order is updated (e.g., items added/removed, address changed)
- Closed adjustments are locked and will not be automatically recalculated
- When a promotion becomes ineligible (e.g., item removed from cart), its adjustments are automatically removed
Store API
Adjustments appear in order responses when you?expand=items,fulfillments on the order. The response exposes the amount, adjustment_total, and the tax totals as money fields:
Related Documentation
- Promotions — Promotion-based adjustments
- Taxes — Tax adjustments
- Shipments — Shipping adjustments
- Orders — How adjustments affect order totals
- Calculators — How tax rate and promotion action amounts are computed

