---
title: "Quantity discounts for supplement brands"
description: "Quantity breaks for supplement brands, from 5% to 15% off each unit, priced by the margin engine on sourced costs, with the lift each tier needs."
url: https://offersuite.io/playbooks/quantity-discounts-for-supplement-brands
updated: 2026-10-13
---

# Quantity discounts for supplement brands

Quantity breaks for supplement brands, from 5% to 15% off each unit, priced by the margin engine on sourced costs, with the lift each tier needs.

### 1 unit

Revenue $47.24 to contribution margin $20.25 (42.9%)

Revenue

$47.24

Cost of goods

−$10.47

Pick and pack

−$3.20

Shipping label

−$9.29

Card fee per order

−$0.30

Refunds

−$2.36

Card processing

−$1.37

Contribution margin

$20.25

2 declared kinds cost nothing on this option

### 4 units, 15% off each

Revenue $138.33 to contribution margin $70.08 (50.7%)

Revenue

$138.33

Cost of goods

−$41.88

Pick and pack

−$3.20

Extra picks

−$1.44

Shipping label

−$10.50

Card fee per order

−$0.30

Refunds

−$6.92

Card processing

−$4.01

Contribution margin

$70.08

1 declared kind costs nothing on this option

Each tier, shipping charged, per order

| Option | Customer pays | Shipping charged | Costs | Margin | Margin % | Conversion against 1 unit |
| --- | --- | --- | --- | --- | --- | --- |
| 1 unit | $37.95 | $9.29 | $26.99 | $20.25 | 42.9% | — |
| 2 units, 5% off each | $72.12 | $9.29 | $40.64 | $40.77 | 50.1% | can lose 50.3% |
| 3 units, 10% off each | $102.48 | $9.29 | $55.20 | $56.57 | 50.6% | can lose 64.2% |
| 4 units, 15% off each | $129.04 | $9.29 | $68.25 | $70.08 | 50.7% | can lose 71.1% |

Every figure is computed by the margin engine in Offer Suite's own code, in whole cents, from the costs below.

## What the numbers say

Quantity breaks take a larger share off every unit as the quantity grows: 5% off each for two, 10% for three, 15% for four. Shipping is charged at $9.29, the 1 lb label passed through, so the offer's cost is the discount alone.

One unit keeps $20.25. Four at 15% off keep $70.08, 50.7% of what the customer pays: the four units share one pick-and-pack fee and one parcel, and the label for four weighs in at $10.50.

Against the single, each tier 2 units can lose 50.3%, 3 units can lose 64.2%, 4 units can lose 71.1% of conversion per visitor. Quantity breaks work when they move buyers up a tier, not when they discount the buyers who would have bought four anyway.

Nature's Sunshine's Subscribe & Thrive takes 25% off every subscription order and ships it free. [Nature's Sunshine, Subscribe & Thrive, read 23 September 2026](https://www.naturessunshine.com/subscribe-and-thrive)

## The cost structure, and where it comes from

|  |  |
| --- | --- |
| Price | $37.95, a bottle of supplements. [Nature's Sunshine homepage, read 23 September 2026](https://www.naturessunshine.com/) |
| Unit cost | $10.47. From the reported gross margin: “Gross margin in 2025 increased to 72.4% compared to 71.5% in 2024.” [Nature's Sunshine, fourth quarter and full year 2025 results, read 23 September 2026](https://ir.naturessunshine.com/news-events/press-releases/detail/267/natures-sunshine-reports-strong-fourth-quarter-and-full) |
| Pick and pack | $3.20 per order and $0.48 for each extra item. [Fulfill.com, 3PL pricing benchmarks (The Fulfillment Advisor 2025 survey of 600+ warehouses), read 23 September 2026](https://www.fulfill.com/3pl-pricing) |
| Shipping label | USPS Ground Advantage, commercial, Zone 5, by weight rounded up to the pound: 1 lb $9.29 · 2 lb $10.50 · 3 lb $12.12 · 4 lb $13.89 · 5 lb $14.53. Packed weight is an assumption: 0.5 lb per unit. [USPS Notice 123, USPS Ground Advantage Commercial, Zone 5 (effective 4 October 2026), read 13 October 2026](https://pe.usps.com/text/dmm300/Notice123.htm) |
| Card fees | 2.9% + $0.30 per order: Shopify Payments' online rate for a standard card on the Basic plan in the United States. Higher plans pay a lower rate, and premium cards a higher one. [Shopify's pricing page for the United States, online standard card rates, read 12 October 2026](https://www.shopify.com/pricing) [Rates by plan and country](https://offersuite.io/fees/shopify-payments/united-states) |
| Refund reserve | 5%, Offer Suite's default assumption for consumables. NRF's all-category figure for online sales is 19.3%, but consumables are rarely returned; use your own rate. |
| Gift | A travel-size bottle: unit cost $5.24, retail $15.00. A half-size bottle, costed at half the full bottle's unit cost. |

## The offer, as an agent writes it

An agent writes this offer as one document for Offer Suite's API, validated against the offer schema. Below is one option of it: what the buyer gets and the price it promises. Offer Suite checks with a real cart that checkout charges exactly the prices above.

**Show one option 4 options · excerpt**

```
{
  "key": "qty-2",
  "display": {
    "title": "2 units, 5% off each"
  },
  "lines": [
    {
      "role": "main",
      "quantity": 2,
      "purchase": {
        "type": "one_time"
      }
    }
  ],
  "pricing": {
    "promise": {
      "firstChargeCents": 7212,
      "renewalChargeCents": null
    }
  }
}
```

How Offer Suite validates, versions and publishes a document like this one: [offer documents](https://offersuite.io/features/offer-documents).

## Questions

### Are quantity discounts profitable for supplement brands?

On these costs one unit keeps $20.25 per order, two at 5% off each keep $40.77 and four at 15% off each keep $70.08. The tiers cost money only on buyers who would have bought the same quantity at full price.

### How much conversion do quantity breaks need for supplement brands?

Against one unit, per visitor: 2 units can lose 50.3%, 3 units can lose 64.2%, 4 units can lose 71.1%.

## See what your own offers earn.

Offer Suite opens to Shopify brands a few at a time. Join the waitlist, or ask for a free profit audit of your past orders: realized profit per item and per offer option, what each costs you, and where margin leaks.

[Join the waitlist](https://offersuite.io/waitlist) [Request a free profit audit](https://offersuite.io/profit-audit)

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- [Feature **Offer documents: one validated document per offer** An offer is one validated, versioned document your agent writes: tiers, bundles, subscriptions, gifts and prices, with no offer types to pick from.](https://offersuite.io/features/offer-documents)
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- [Benchmark **Supplements benchmarks from annual reports** What 6 US-listed companies selling vitamins, supplements and nutrition programs report: a median gross margin of 75.0%, from 69.4% to 78.3%. Read 13 October 2026.](https://offersuite.io/benchmarks/supplements)
- [Glossary **Contribution margin: definition and formula** What an order keeps after every cost that grows with it: product cost, fulfilment, shipping, card fees and refunds. The number an offer should be judged on.](https://offersuite.io/glossary/contribution-margin)