⚡ THE ESSENTIALS IN 20 SECONDS
- GMV (Gross Merchandise Value) is the total value of goods sold in a period, before returns, cancellations, fees or costs.
- Marketplaces use it to measure the size of their business; for a brand it is a starting point, not the bottom line.
- It is not the same as revenue or net sales.
- In retail media, comparing ad spend with GMV shows how much weight advertising has in the business.
IN THIS ARTICLE
In marketplace reports, investor decks and retailer meetings you will hear GMV a lot. It sounds like “sales”, but it is not exactly that. Knowing the difference keeps you from overstating results and helps you speak the retailer’s language.
GMV (Gross Merchandise Value): the gross value of all products sold in a period, calculated as selling price times units sold, without subtracting returns, cancellations, later discounts, fees or costs.
How to calculate it
The basic formula is GMV = selling price × units sold, summed across all products in the period.
| Item | Fictional example (month) |
|---|---|
| Units sold | 2,000 |
| Average price | USD 25 |
| GMV | USD 50,000 |
| Returns and cancellations | − USD 2,500 |
| Net sales | USD 47,500 |
GMV is the biggest number in the report. That is why it is so popular in presentations… and so risky when confused with revenue.
GMV vs net sales vs revenue
| Metric | What it includes | Who uses it most |
|---|---|---|
| GMV | Everything sold, at selling price | Marketplaces, investors |
| Net sales | GMV minus returns, cancellations and discounts | Brands, finance |
| Marketplace revenue | Fees, advertising and fulfillment the platform charges | The marketplace |
| Contribution margin | Sales minus variable costs | Profit-focused brands |
For a marketplace, GMV measures how much money flows through its platform. For a brand, margin pays the bills. More in what contribution margin is.
Why it matters in retail media
Many brands measure advertising as a percentage of GMV at a retailer: how much they spend on ads per dollar sold in total. It is very close to TACOS, but at the level of the business with that retailer. It helps compare retailers and negotiate media budgets inside a joint business plan.
Common mistakes
- Presenting GMV as if it were the brand’s revenue.
- Comparing a promotional month’s GMV with a normal month without saying so.
- Forgetting returns in categories where they are high (apparel, electronics).
- Celebrating GMV growth while margin is falling.
How to use it well
- Report GMV, net sales and margin together, never GMV alone.
- Use GMV to measure size and share at a retailer.
- Use margin to decide investment.
- Compare ad spend with GMV by retailer to see where advertising weighs most.
A reading example (fictional)
A brand grew GMV 30% in a quarter thanks to aggressive discounts. The report looked amazing. But net sales and margin told another story: contribution margin had fallen from 32% to 21% and returns had risen. Growth was real in volume, but the business made less money. With GMV alone, nobody would have noticed.
GMV tells you how big your business is; margin tells you how good it is.
GMV in your retailer meeting
In business reviews with a retailer, GMV is usually the first slide: how much your brand sold on their platform, how much it grew and what share it holds in the category. Come prepared with three numbers: your GMV for the period versus the previous one, your spend on their media as a percentage of that GMV, and your margin. With those you can negotiate more visibility, better promotional dates or media support with arguments, not gut feeling. Retailers respond to brands that understand their numbers and can show how more investment would grow GMV for both sides.
- GMV for the period and growth.
- Media spend as % of GMV.
- Contribution margin for the channel.
- A clear ask: what you want from the retailer next quarter.
Agency secrets about GMV
What I apply in client reports:
Whenever I show GMV, I show margin or TACOS next to it. It prevents rushed conclusions.
In retailer meetings, GMV is their favorite metric. Use it to negotiate, but decide with margin.
If GMV rises because of discounts, say so clearly so nobody reads it as organic growth.
A good report does not look for the biggest number: it looks for the number that leads to the best decision.
I’m Alonso Jiménez, a Retail Media account director. I manage campaigns on Amazon, Walmart, Target, Instacart and Mercado Libre every day, for brands in the US, Mexico and Latin America. For leadership reporting, see how to build a QBR.
Frequently asked questions
What does GMV stand for?
Gross Merchandise Value: the gross value of goods sold in a period.
Is GMV the same as sales?
No. GMV does not subtract returns, cancellations or later discounts; net sales do.
Why do marketplaces use GMV?
Because it measures how much value flows through the platform, even though they only keep fees, advertising and services.
How does it relate to advertising?
Dividing ad spend by a retailer’s GMV shows how much advertising weighs in that business.