Introduction

Updated 11 July 2026

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Quantity Pricing Rules (@webbycrown/medusa-quantity-pricing-rules) is a Medusa v2 plugin that lets store owners and administrators configure volume-based and tiered pricing directly from Medusa Admin – without writing code for everyday pricing work.

Whether you sell wholesale, offer bulk discounts, or run B2B tier tables, this plugin helps you set “buy more, pay less” rules per product and optionally per variant.

What is quantity pricing?

Quantity pricing (also called volume pricing, tier pricing, or bulk pricing) means the unit price changes based on how many items a customer buys.

Regular pricing Quantity pricing

1 unit = $100 always
  • 1-9 units = $100 each
  • 10-49 units = $90 each
  • 50+ units = $75 each

You define these tiers in Medusa Admin. The plugin stores them in your database and calculates the correct price when your storefront requests it.

Introduction

Why use quantity pricing?

Business need How it helps

Encourage larger orders

Customers see savings as quantity increases

Wholesale & B2B

Publish transparent tier tables instead of manual quotes

Clear slow inventory

Steeper discounts at higher quantities

Variant case pricing

Different tiers per size, pack, or SKU

Multi-currency stores

Separate tier tables per currency

Key features

Admin settings page

Settings → Extensions → Quantity Pricing

Product widget

Manage tiers on each product page (product ID pre-filled)

Store widget

Rule count summary on Settings → Store

Three pricing types

Fixed price, percentage discount, fixed amount off

Quantity ranges

Min/max quantities; empty max = open-ended (e.g. 51+)

Variant scoping

All variants or one specific variant

Multi-currency

One currency per rule (usd, inr, eur, etc.)

Customer groups & regions

B2B/regional rules via Admin API

Store API

List tiers and get calculated_price for any quantity

Auto cleanup

Rules removed when a product is deleted

How it works

  • Install the plugin and run database migrations.
  • Create quantity pricing rules in Medusa Admin (e.g. 11–50 units → $90 each).
  • Rules are saved in the quantity_prices table.
  • Your storefront calls the Store API with product, variant, quantity, and currency.
  • The plugin returns the matching unit price, line total, and rule ID.
  • Your cart/checkout applies that price to the order line.

Note The plugin provides pricing calculation and Admin management. It does not automatically update cart line items – your storefront must call the Store API and apply the returned unit_price.

Common use cases

Wholesale pricing

Fixed price tiers at 10, 25, 50+ units

Bulk retail discounts

5+ save 10% (percentage tier)

B2B segment pricing

Customer group rules via API

Variant case pricing

48-pack variant only

Inventory clearance

Aggressive fixed tiers at high quantities

Multi-currency

Separate INR and USD tier tables

Requirements

Requirement Version

Medusa

v2.13+ (@medusajs/framework ^2.13)

Node.js

20+

Database

PostgreSQL

Package

1.0.1

Warning This plugin is for Medusa v2 only. It does not support Medusa v1.

Resources