What Is a Free Shipping Threshold?
A free shipping threshold is the minimum order value a customer must reach to qualify for shipping at no charge. Merchants use thresholds to encourage customers to add items to their carts while limiting how many orders require the store to absorb shipping costs.
A threshold can raise average order value (AOV), but it also reduces shipping revenue on qualifying orders and adds shipping expense. The right threshold balances those effects against any increase in conversion rate; compare the result with your product margin, order mix, and shipping costs before changing your policy.
Free Shipping Threshold Formulas
Threshold amount
Free Shipping Threshold = Current AOV × (1 + Threshold Increase %)
Estimated orders after a relative conversion lift
Estimated Orders = Monthly Orders × (1 + Conversion Lift %)
Estimated AOV after an AOV lift
Estimated AOV = Current AOV × (1 + AOV Lift %)
Gross profit on a qualifying order after absorbed shipping
Profit After Shipping = Order Value × Gross Margin − Average Shipping Cost
These formulas estimate product gross profit before payment fees, discounts, returns, and operating expenses. A full comparison also needs to account for shipping fees you currently collect and the share of orders already receiving free shipping.
How to Use This Calculator
- Enter
currentAov— your current average order value, calculated as sales revenue divided by orders for the same period. - Enter
monthlyOrders— the total number of orders in a typical month. Use a representative month or compare several months if your sales are seasonal. - Enter
grossMargin— the percentage of product revenue left after product costs, before shipping and other operating expenses. - Enter
avgShippingCost— the average shipping expense your store pays for an order when you offer free shipping. - Enter
shippingChargedNow— the average shipping fee customers currently pay. This helps compare the new offer with your existing policy. - Enter
currentFreeShipPct— the percentage of orders that already qualify for free shipping, or zero if you have no threshold. - Set
conversionLift— your estimated conversion-rate increase from offering the threshold. Treat an increase of 10% as a relative lift, not automatically as 10 percentage points. - Set
aovLift— your estimated AOV increase as customers add products to qualify. Review the comparison for the 15%, 25%, and 35% threshold options, then check how the profit impact changes with your assumptions.
For a more precise AOV baseline, use the AOV Calculator; to test conversion assumptions against traffic and revenue, use the Conversion Rate Calculator.
Step-by-Step Example
A Shopify store selling home fragrance has a $64 AOV, 500 monthly orders, a 55% gross margin, and an average shipping cost of $8.50. It currently charges customers an average of $6.50 for shipping. The table compares qualifying-order economics at three possible thresholds:
| Threshold option | Calculation | Threshold | Product gross profit | Profit after absorbed shipping |
|---|---|---|---|---|
| 15% above AOV | $64 × 1.15 = $73.60 | $73.60 | $73.60 × 0.55 = $40.48 | $40.48 − $8.50 = $31.98 |
| 25% above AOV | $64 × 1.25 = $80.00 | $80.00 | $80.00 × 0.55 = $44.00 | $44.00 − $8.50 = $35.50 |
| 35% above AOV | $64 × 1.35 = $86.40 | $86.40 | $86.40 × 0.55 = $47.52 | $47.52 − $8.50 = $39.02 |
The higher threshold produces more product gross profit per qualifying order in this simplified comparison, but it may also be harder for customers to reach. These figures exclude payment fees and do not predict what share of orders will qualify; use the calculator’s conversion and AOV assumptions to compare the broader impact.
Choosing a Threshold: Profit, Reach, and Shipping Rules
A higher threshold can protect profit per qualifying order, while a lower one may be easier to reach and more likely to influence a purchase. Test whether typical products or bundles can move a shopper’s cart to the threshold with one or two additions. If reaching it requires a large extra purchase, customers may abandon rather than add items.
Do not treat an AOV lift as the percentage of orders that qualify. For example, a higher average cart can result from a few large orders while many customers remain below the threshold. The AOV Upsell Impact Calculator can help model add-ons and bundles separately.
Also distinguish product gross margin from contribution after fulfillment: a positive product margin does not guarantee a profitable order once shipping, discounts, payment fees, and returns are included. For cross-border orders, include applicable import costs in your landed-cost assumptions; U.S. Customs and Border Protection explains duties and taxes on imported goods. If you advertise a shipping timeline, your fulfillment process must support it: the FTC’s order-fulfillment guidance explains what sellers must do when they cannot ship within the promised period.
Planning Ranges to Test
These are modeling ranges, not guaranteed results or universal industry averages. Use your own store data to replace them as you gather evidence.
| Input or threshold | Planning range | What to check |
|---|---|---|
| Conversion lift | 5–15% | Compare conversion before and after the offer, controlling for traffic and promotions. |
| AOV lift | 10–20% | Check whether cart values rise, not just whether more shoppers qualify. |
| Threshold above current AOV | 15%, 25%, or 35% | Compare reachability against profit per qualifying order. |
| Gross margin | Above 40% is a more forgiving starting point | Re-test carefully if shipping and discounts leave little contribution. |
Online sales patterns also change over time, so compare like-for-like periods rather than attributing a seasonal sales shift to the threshold alone. The U.S. Census Bureau’s quarterly e-commerce data provides context for broader online retail trends.
6 Tips to Test Your Free Shipping Threshold
- Change the threshold from 25% to 15% above AOV for a test period and compare the qualification rate and profit per order.
- Change your assumed conversion lift from 10% to 5% to see whether the offer still works under a cautious scenario.
- Change your shipping cost from $6.50 to $9.00 if a recent carrier invoice shows higher rates; dimensional weight can make bulky orders more expensive.
- Change your AOV lift from 15% to 8% if customers rarely add products today, then compare the projected profit impact.
- Add a cart progress bar with an app such as Hextom Free Shipping Bar or mProgress Bar, and test whether it increases qualifying carts.
- Test a bundle or complementary product that bridges the gap to free shipping; model the bundle’s product cost before promoting it.
- Compare the offer across equivalent seasonal periods rather than comparing a holiday promotion with a quieter month. The Census Bureau’s quarterly data can help identify broader online-sales shifts.
Frequently Asked Questions
How do I set the right free shipping threshold?
Set your threshold 15–35% above your current AOV and test whether customers can reach it with one or two additional items. With a $58 AOV, a starting range is $70–$80; this calculator compares thresholds at 15%, 25%, and 35% above AOV. A threshold that is too high may rarely be reached, while one that is too low can make you absorb shipping without increasing cart value.
Does free shipping increase conversion rate?
Free shipping can increase conversion, and commonly cited estimates put the lift at 5–15%; unexpected shipping costs are also reported as a major reason for cart abandonment. Threshold offers may raise AOV by 10–20% when shoppers add products to qualify, but your store’s result depends on product mix, shipping cost, and how visible the offer is.
Can I afford to offer free shipping?
You can assess affordability by subtracting the shipping cost you absorb from gross profit on a qualifying order. A $58 order at 60% margin produces $34.80 in product gross profit; subtracting $7 shipping leaves $27.80 before other fees and expenses. Conversion and AOV lifts can improve the total result, but test the assumptions rather than treating them as guaranteed.
Should I offer free shipping on all orders or use a threshold?
A threshold usually protects small orders better because it ties free shipping to a minimum cart value and gives shoppers a reason to add products. Blanket free shipping is simpler and may suit stores with high AOVs, but it removes shipping revenue from every order; compare both policies using your own order and fulfillment costs.
How do I display the free shipping threshold on Shopify?
Show a progress bar in the cart so shoppers can see how much more they need to spend, and announce the offer in your header, product pages, and cart. Shopify merchants can use apps such as Hextom Free Shipping Bar or mProgress Bar, or add the message to their theme; test different threshold amounts to see which one changes cart behavior.
About This Calculator
The Free Shipping Threshold Optimizer was built by Luis Dev Studio for Shopify merchants comparing shipping policies against margin, conversion, and AOV assumptions. For help improving your store’s shipping or checkout experience, explore our services or contact us.
Updated by Luis Gonzalez · Oct 10, 2026