Gross Merchandise Value is calculated by adding up the final transaction value of every sale a platform processed during the reporting period, before subtracting fees, platform commissions, or operating costs. If a marketplace handled 10,000 orders in a quarter and those orders totaled $2 million, GMV for that quarter is $2 million. That’s the whole formula. The complications come from what each platform chooses to fold into “transaction value” and from what the resulting figure does and doesn’t tell you about the business.
The Core Formula
GMV is the sum of all completed transaction values over a set period. A $15 candle and a $900 couch both count at face value. You’ll sometimes see it described as “price times quantity,” but that shorthand only works when every item sells at the same price. In practice, platforms sell thousands of products at different prices, so the calculation is just addition: every paid order, summed.
The result is a gross figure. Nothing has been taken out for the platform’s cut, payment processing, shipping the platform absorbed, or the seller’s own costs. It measures economic activity the platform facilitated, not money the platform earned.
What Goes Into the Number
There is no universal standard for what belongs inside GMV. Each company defines the metric in its own filings, and the two biggest variables are shipping costs and taxes.
eBay defines GMV as “the total value of all paid transactions between users on our platforms during the applicable period inclusive of shipping fees and taxes.”1eBay Inc. Investor Relations. eBay Announces Change to Gross Merchandise Volume Definition and Releases Updated Historical Metrics Shopify takes a similar approach, defining GMV as “the total dollar value of orders facilitated through the Shopify platform…net of refunds, and inclusive of shipping and handling, duty and value-added taxes.”2Securities and Exchange Commission. Shopify Announces First-Quarter 2021 Financial Results
Other platforms strip both out. Salesforce’s B2C Commerce platform excludes shipping and taxes from its GMV reports.3Salesforce. Recommendations for GMV Report Calculation in B2C Commerce The argument for excluding taxes is that the platform collects them as an agent for the government, so they don’t represent value the marketplace created. The argument for including them is that GMV is supposed to capture total transaction size from the buyer’s point of view.
What virtually everyone agrees on: platform commissions and transaction fees are never inside GMV. Those are deductions applied against GMV to arrive at revenue. GMV measures what buyers paid, not what the platform kept.
Two platforms with identical transaction volumes can report meaningfully different GMV numbers depending on whether they include shipping and taxes. Read the footnotes before comparing them.
Refunds, Cancellations, and Returns
Timing of deductions matters. Shopify calculates GMV net of refunds, which is a more conservative approach.2Securities and Exchange Commission. Shopify Announces First-Quarter 2021 Financial Results Not every company does. If a platform reports GMV before fully accounting for returns, cancellations, and chargebacks, the number overstates real activity, and the size of the overstatement depends on the category. A clothing marketplace with 30% return rates will show a very different picture net of returns than gross.
GMV Is Not Revenue
The distance between GMV and what a company can book as revenue is where marketplace economics live. Under the accounting framework governing revenue recognition (ASC 606), a company that controls goods before they reach the customer is a principal. A company that merely arranges the transaction between buyer and seller is an agent. That distinction controls how much of the transaction value the company can call revenue.4FASB. Revenue from Contracts with Customers (Topic 606)
A traditional retailer is a principal. It buys inventory, owns it, sells it to you, and books the full sale price as revenue. A marketplace like Etsy is an agent. It never touches the goods. When you buy a handmade mug there, the seller ships it directly, and Etsy’s revenue is only the fee it charged for facilitating the sale.
ASC 606 lists three indicators pointing toward principal status: primary responsibility for delivering the goods, inventory risk before the customer receives the product, and discretion over pricing.5Deloitte Accounting Research Tool. ASC 606-10 – Determining Whether an Entity Is Acting as a Principal The more of those a company has, the more likely it recognizes revenue on a gross basis.
Take Rate
Take rate is the bridge from GMV to revenue. Divide marketplace revenue by GMV. A platform that generated $50 million in revenue on $500 million in GMV has a 10% take rate.
Take rates vary with how much work the platform does beyond connecting buyer and seller. Marketplaces that mainly aggregate demand and let sellers handle fulfillment tend to run 5% to 15%. eBay’s fees run roughly 2.5% to 15% depending on category. Etsy charges a 6.5% transaction fee plus listing fees and payment processing. Platforms that manage logistics, verify authenticity, or handle delivery command higher take rates, often 20% to 30%; Uber and DoorDash sit in that range because they built full fulfillment networks.
For evaluating a marketplace, take rate is often more useful than raw GMV. A platform with declining GMV and a rising take rate may be getting healthier. A platform with soaring GMV and a shrinking take rate may be buying growth with discounts and subsidies that don’t pencil out.
Metrics That Look Like GMV but Aren’t
Not every company calls its transaction volume GMV, and the related metrics measure slightly different things:
- Gross Transaction Volume (GTV), used by companies like Lightspeed, measures the total dollar value of transactions processed through a platform’s software regardless of whether the platform handled the payment. It’s typically broader than GMV.
- Total Payment Volume (TPV), used by PayPal and payment processors, captures the dollar value of payments the platform actually processed, net of reversals. It measures payment activity, not merchandise value.
- Gross Payment Volume (GPV), used by Block (formerly Square), measures the total dollar amount of card and bank payments processed through the platform, net of refunds. Unlike GTV, it only counts transactions where the platform touched the money.
A company reporting GTV will show a larger number than the same company would report as GPV, because GTV includes transactions the platform facilitated but a different processor handled. Comparing platforms means checking you’re looking at the same metric, defined the same way.
How GMV Shows Up in SEC Filings
GMV is not a GAAP metric. No accounting standard defines it or prescribes how to calculate it. That makes it subject to the rules governing non-GAAP financial measures.
Regulation G requires that whenever a company publicly discloses a non-GAAP measure, it must also present the most comparable GAAP measure alongside it and provide a quantitative reconciliation showing how the two connect.6eCFR. 17 CFR 244.100 – General Rules Regarding Disclosure of Non-GAAP Financial Measures For a marketplace, that generally means showing GAAP revenue next to GMV and walking through the math that connects them.
Item 10(e) of Regulation S-K adds more for SEC filings specifically. Companies must present the comparable GAAP measure with “equal or greater prominence,” explain why the non-GAAP metric is useful to investors, and avoid labels that are “the same as, or confusingly similar to” standard GAAP line items.7eCFR. 17 CFR 229.10 – General The SEC has flagged presenting revenue on a gross basis when GAAP requires net presentation, or the reverse, as potentially misleading under both Regulation G and staff interpretive guidance.8Securities and Exchange Commission.