Free Shipping at $50 or $75: Which Threshold Makes More Money?
A lower free-shipping threshold can improve conversion. A higher threshold can push customers toward larger baskets. The best threshold is the one that produces the strongest economics after shipping cost, margin and customer behavior are included.
“Spend $X and get free shipping” quietly changes the economics of the entire cart.
Imagine the average customer currently spends $54.
Set free shipping at $50 and most normal orders may immediately qualify.
Set it at $75 and some customers may add another product to avoid paying for delivery.
But others may decide the extra spend is not worth it.
The decision therefore sits between conversion, basket size, product margin and shipping subsidy.
Start with a $54 average order and $8 shipping cost.
Current average customer basket.
Simplified product-margin assumption.
Amount paid by the merchant when shipping is free.
Baseline volume used for the comparison.
$50 creates more qualifying orders. $75 creates bigger baskets.
These numbers are illustrative. The important part is the mechanism behind the comparison.
Fewer orders qualify for free delivery, but each order becomes economically stronger.
The $50 threshold produces more orders.
That initially looks attractive.
But it also makes free delivery available to baskets that would probably have purchased anyway.
At $75, fewer customers qualify automatically. Some increase their basket to cross the threshold, while the business subsidizes fewer shipments.
Under these assumptions, the combination creates about $5,175 more contribution.
Approximate monthly contribution advantage from the $75 threshold under the simplified assumptions used in this example.
Three things can happen when customers see “Free Shipping at $75”.
A $62 basket may become an $80 basket if the additional product feels more valuable than paying a separate delivery fee.
Some customers prefer keeping the smaller basket and paying delivery. That can still produce perfectly acceptable economics.
Raise the threshold too far and the offer may stop feeling achievable. Conversion can decline enough to erase the benefit.
Too low subsidizes orders. Too high stops motivating them.
Measure three things, not one.
Does the higher threshold materially reduce the number of customers who complete checkout?
How many customers add products, and how much incremental contribution does that extra basket value create?
How much delivery cost is the business absorbing under each threshold?
Do not choose the threshold that customers like most. Choose the one where customer behavior and economics work together.
But the $75 threshold produced larger baskets, required fewer shipping subsidies and generated higher simplified contribution.
That made $75 the stronger choice.
Change the conversion response, shipping cost or margin mix and the result can change too.
The correct threshold is therefore not a marketing guess. It is an economic experiment.
AOV, shipping and margin should not be analyzed as separate numbers.
MarginLab helps ecommerce operators investigate profitability, product economics and the costs that can disappear behind apparently positive revenue decisions.