Ecommerce Free Shipping Threshold Calculator
Calculate the minimum order value needed to offer free shipping while preserving your target contribution margin.
Threshold detail
Current AOV check
Set a free shipping threshold from margin economics instead of guesswork
Use this calculator when you want to know the minimum cart value that can absorb shipping without pushing order contribution below your target margin.
The key input is your contribution margin before outbound shipping. That margin represents the share of revenue left after the other variable costs attached to the order.
The calculator then finds the order value where the shipping cost consumes only the difference between your pre-shipping margin and your target margin after free shipping.
A free shipping threshold can also influence customer behavior and average order value. This calculator focuses on the economic floor, not on how customers will respond to the threshold.
How the free shipping threshold is calculated
The calculator solves for the order value where absorbed shipping fits inside the margin you are willing to give up.
Start with pre-shipping contribution margin
This is the share of order revenue left after product and other variable costs, before the outbound shipping cost being tested.
Define the target margin after shipping
The difference between pre-shipping margin and target margin is the share of revenue available to fund free shipping.
Calculate the threshold
Shipping cost is divided by that available margin percentage to find the minimum qualifying order value.
Compare with current AOV
If you enter current average order value, the calculator shows the resulting margin after shipping and how far AOV is above or below the threshold.
Example free shipping threshold calculation
Suppose an ecommerce business has the following order economics:
The business can give up 10 percentage points of margin to fund shipping. A $6 shipping cost therefore requires a $60.00 order to preserve a 40% contribution margin. The break-even free shipping threshold is $12.00. At a current AOV of $55.00, margin after shipping is about 39.1%, so AOV would need to increase by $5.00 to reach the target threshold.
What each result means
The recommended threshold protects a target margin, while the break-even threshold marks the much lower zero-contribution floor.
Recommended free shipping threshold
The minimum order value where the shipping cost can be absorbed while preserving the target margin entered.
Break-even free shipping threshold
The order value where all pre-shipping contribution is consumed by shipping, leaving zero contribution after shipping.
Margin at current AOV after shipping
The contribution margin your current average order value would produce if the business absorbed the entered shipping cost.
AOV increase needed
The amount current AOV would need to rise to reach the recommended free shipping threshold.
AOV above threshold
The amount current AOV already exceeds the recommended threshold when no increase is needed.
Free shipping threshold questions
Common questions about setting a minimum order value for free shipping.
What should I use for pre-shipping contribution margin?
Use the percentage of order revenue left after variable costs such as product cost, fulfillment, packaging, payment fees, and advertising if you want advertising included, but before the outbound shipping cost you are testing.
Why is the break-even threshold much lower than the recommended threshold?
Break-even allows contribution after shipping to fall all the way to zero. The recommended threshold preserves the target margin you entered.
Should I set the public threshold exactly at the calculated amount?
Not necessarily. The calculation gives you an economic floor for your target margin. You may choose a cleaner merchandising number above it, such as $60 instead of $58.73.
What if target margin is equal to or higher than pre-shipping margin?
Then there is no margin available to fund free shipping. You would need a higher pre-shipping margin, a lower target margin, a lower shipping cost, or another source of contribution.
Does this predict whether a threshold will increase AOV?
No. It calculates sustainable order economics. Customer response, conversion rate, and basket-building behavior require separate testing or historical data.