For every price rule you set, you can define a priority level. 1 is the highest priority.
As rules are processed one after the other, giving them a priority order will let you choose which one will override the others if they apply to the same product.
Please, consider that priority helps you manage rules that apply to the same product and refers to all rules of the same type.
Note: there are two distinct priority lists for rules Price Rules and Cart Discounts. Even though they are listed in a unique list, they have a separate priority, because one applies to the cart, others at the product level.
First of all, the system processes Price Rules. It starts with Quantity Discount rules: if a quantity rule applies to a product, all other rules (either Quantity discount or Special offer) applying to the same product will be then ignored, even if the option Disable other rules with lower priority is enabled.
If there are, though, more than one quantity discount or special offer rules applying to different products, they will be all applied, as they do not apply to the same product and do not conflict with one another. This applies only if the option Disable other rules with lower priority is enabled.
After that, Cart discounts will be processed and will apply to the cart total. Cart discount rules can be combined and applied one after the other.
Let’s make an example to make things easier.
- Quantity discount rule, priority 2: Product A costs $10, but it costs $5 if the quantity is greater or equal to 10.
- Special offer on Product A, priority 1: buy one and get one at 50%
- Special offer on Product B, priority 1: buy one and get one at 50%
- Cart discount rule, priority 1: 20% off everything
Our cart contains
- Product A ($5 to $10): 12 items
- Product B ($18): 2 items
Price rules (Quantity discount and Special offer) will be processed first, so, No. 1, 2, 3.
Rule No. 1 and 2 apply to the same product (Product A), so, only rule No. 1 is applied as it is a Quantity discount rule and is processed first, regardless of the priority.
Product A costs $5 each.
Rule No. 2 is so ignored.
Rule No. 3 is applied to Product B. So, one is at full price of $18, and the second one is at half price of $9.
Now the cart subtotal is (12 x $5) + $18 + $9 = $87
Rule No. 4 applies to the cart subtotal, so, the final price is $69.60.