Membership discount profit calculator
Compare sales and gross profit before and after a member discount. See how the discount changes margin, with membership revenue shown separately from order profit.
Calculate discount impactYour monthly inputs
All amounts are in USD. Defaults are fictional examples. Use the same eligible orders, product mix and period for every input. No signup or store connection required.
Before and after the member discount
| Metric | Before discount | After discount |
|---|---|---|
| Monthly order revenue | Calculating… | Calculating… |
| Monthly product costs | Calculating… | Calculating… |
| Monthly order gross profit | Calculating… | Calculating… |
| Order gross margin | Calculating… | Calculating… |
- Monthly discount cost (sales revenue given up)
- Calculating…
- Monthly membership revenue, before membership costs
- Calculating…
Order gross profit plus membership revenue
Calculating…
After the modeled discount. This subtotal is not net profit or the incremental return from offering the discount.
Other benefit costs, payment processing, fulfillment not included in product costs, acquisition costs, fixed overhead and taxes are excluded.
How the discount margin calculation works
- Starting order revenue = monthly eligible orders × AOV before the member discount.
- Product costs = starting order revenue × (1 − starting gross margin).
- Discount cost = starting order revenue × member discount rate.
- Discounted order revenue = starting order revenue − discount cost.
- Gross profit after discount = discounted order revenue − product costs.
- Gross margin after discount = gross profit after discount ÷ discounted order revenue × 100.
- Subtotal including membership revenue = gross profit after discount + monthly membership revenue.
Percentages are converted to decimals for the calculations. For example, 50% becomes 0.50. Order count, product costs and basket value before the discount remain fixed. Calculations use unrounded values; money is displayed to cents and margins to two decimal places.
Worked membership discount example
A fictional store has 100 eligible member orders per month at $100 before the member discount. With a 50% starting gross margin, order revenue is $10,000, product costs are $5,000 and gross profit is $5,000.
A 10% discount gives up $1,000 of revenue. Discounted revenue becomes $9,000 while product costs remain $5,000. Gross profit is $4,000, and the new gross margin is $4,000 ÷ $9,000 × 100 = 44.44%.
Adding $1,000 of monthly membership revenue produces a $5,000 subtotal before other costs. It does not establish that the program earns $5,000 net profit or that the discount generated the membership revenue. These figures illustrate the formula, not expected results.
Use the right order value and margin
Use the basket value before the specific member discount you are testing. If your reported AOV already includes that discount, use order data to establish the value before it. Do not apply the same discount twice. The average order value calculator can help with a consistent sales-per-order baseline.
If the discount applies only to some products, enter the value and margin of the eligible part of the basket. Other product profit is then outside this estimate. For multiple product categories, use a sales-weighted gross margin for the same mix, rather than an unweighted average of percentages.
At a 100% discount, sales revenue is zero and gross margin is undefined, even though product costs remain. With zero eligible orders or zero starting order revenue, both margins show N/A. A discount above the starting margin can produce negative order gross profit.
Membership revenue does not remove benefit costs
Membership fees may help fund benefits, but credit rewards, shipping subsidies, support and other membership costs still matter. The subtotal here adds fee revenue without modeling those costs. Use revenue attributable to the same period and do not mix an annual cash receipt with a single month of orders without an appropriate allocation.
This is a fixed-volume comparison. It does not predict extra purchases, membership signups or retention improvements. Compare actual customer groups and include the full cost of the offer before interpreting an increase as program profit.
Plan the full membership offer
Use the loyalty ROI calculator for incremental contribution and reward costs, and the break-even ROAS calculator to examine advertising capacity after variable order costs.
Our membership pricing guide covers how to frame an offer. Memberply lets Shopify merchants configure discounts for eligible members and combine them with other configured benefits. A discount does not guarantee a profitable membership program.
Explore Memberply on ShopifyMembership discount questions
Should average order value be before or after the member discount?
Enter average order value before the member discount being modeled. The calculator applies that discount once. If other discounts are already reflected in the starting AOV, use a matching starting gross margin and do not include them again in the member discount rate.
How is gross margin after a discount calculated?
Divide gross profit after the discount by discounted order revenue, then multiply by 100. Product costs stay constant in this model. A $100 order with $50 product cost and a 10% discount has $40 gross profit on $90 revenue, giving a 44.44% gross margin.
Why does a 10% discount reduce profit by more than 10%?
The discount reduces sales revenue while product costs remain unchanged. If a $100 order originally has $50 gross profit, a $10 discount leaves $40. Gross profit falls by 20% even though the price falls by 10%.
Does membership revenue make the result net profit?
No. Order gross profit plus membership revenue is only a subtotal. Membership benefit costs, payment processing, fulfillment not included in product costs, acquisition costs, overhead and taxes may still need to be deducted.
What happens with a 100% discount?
Discounted order revenue becomes zero while product costs remain. Gross profit can be negative. Gross margin is undefined because it would divide by zero, so the calculator shows N/A rather than a percentage.
Does this model predict more orders from offering discounts?
No. Order count, basket value before the modeled discount, and product costs remain fixed. Membership revenue is an entered assumption. The calculator does not prove that a discount causes extra purchases or membership sales.
Can Memberply offer member-only discounts?
Yes. Memberply lets Shopify merchants configure discounts for eligible members. Choose an offer that fits your margins and membership benefits, then measure actual purchasing and costs. A configured discount does not guarantee profitability.