How to add quantity breaks (2-pack, 3-pack) on Shopify without checkout surprises
By the Impact Marvel team · Updated
Short answer
Use a pack widget backed by a Shopify Discount Function: shoppers choose 1, 2 or 3 on the product page, see the saving, and the same discount is applied natively in cart and checkout. Avoid apps that fake the price with separate bundle products.
The common mistake
Some bundle setups create hidden bundle products or apply discount codes late, so the product page shows one price and checkout shows another. Merchants report this in app reviews as one of the fastest ways to lose a sale.
Which products suit packs
Consumables and basics: skincare, supplements, snacks, candles, socks, t-shirts. For one-off items, a complementary product works better than a discount.
Choosing the discount
Start small (for example 8–10% on 2, 12–15% on 3) and check your margin after shipping and payment fees.
Step by step
- Open CartLift → Quantity packs.
- Set the 2-pack and 3-pack discount.
- Choose all or selected products.
- Add the Quantity packs block above the buy buttons.
- Test a 2-pack and a 3-pack through to checkout.
Frequently asked questions
What happens if a shopper also uses a coupon?
Shopify’s discount combination rules decide. The pack discount is a native Shopify discount, so it follows the same rules as your other discounts.