In short: Add a 100% Product Discount on the gift product with a Quantity Limit of 1 and Cart Subtotal at least your minimum plus the gift's price, and a Shipping Discount with Free Shipping and Cart Subtotal at least your minimum. OneCode: Stackable Discounts doesn't add the gift to the cart, so tell customers to add it.
Why one discount: Shopify's own Buy X Get Y discount only discounts the item the customer gets, so free shipping or money off would be separate discounts. OneCode puts them in one code or one automatic discount.
Steps
The example gives a $20 tote bag free, plus free shipping, on orders of $100 or more.
Click Create discount. Choose Automatic discount with a Title such as
Free tote and shipping over $100, or a code.Click Add Discount Type and enter
100in Percentage. Set Target to Specific Products and pick the tote bag.Click Add quantity limit and enter
1.Under Per-Discount Conditions, click Add Condition. Set Field to Cart Subtotal, Operator to Greater than or equal to and Value to
120.Click Add Discount Type, set Discount Type to Shipping Discount and keep Free Shipping. Add the condition Cart Subtotal at least
100.Click Save discount.
Tell customers about the gift on your product pages, cart or announcement bar, for example "Spend $100 and add a free tote to your cart".
What the customer gets
$110 of products plus the tote ($130 cart): the tote is free, and so is shipping.
$110 of products without the tote: free shipping.
$90 of products plus the tote ($110 cart): free shipping, but the tote isn't free, because the cart is under $120.
Why $120 for the gift
Cart Subtotal includes the gift's own price. With 100, a customer could spend $80 and add the $20 tote to reach $100. Adding the gift's price keeps the minimum at $100 of other products. Free shipping uses 100, so customers who don't add the gift still get it.
Variations
10% off everything as well: add a product discount of
10% on All Products. The tote still gets 100% off, because each item gets its best product discount. A second tote is full price.Free gift with a specific product: instead of Cart Subtotal, add the Global Condition Product In Cart Contains the product they need to buy. See Buy one product, get a discount on others.
Choose one of several gifts: pick every gift product in Target. The quantity limit of
1makes only one of them free. Set Cart Subtotal using the most expensive gift's price.
Good to know
If the customer adds two totes, only one is free.
The gift has to be for sale in your online store so customers can add it to their cart.
More patterns like this: Advanced setups.