Same-Store Sales Definition: Same-store sales measure the change in revenue from stores or restaurants that have been open for at least a full year, excluding new openings and closures. Because the store base stays fixed, the figure shows whether existing locations are selling more or less rather than whether the company is simply adding outlets. Also called comparable sales or comps, it is reported as a percentage change against the same period a year earlier.
What Is Same-Store Sales?
A chain can grow revenue by 13% while its existing stores sell less than a year earlier. Opening new locations adds sales almost automatically, so total revenue says little about whether customers like the shops they already know. Same-store sales strip that expansion out.
Retailers and restaurant companies report the measure every quarter, and analysts forecast it as closely as earnings. Each company writes its own rules. Most include a store only after 12 or 13 full months of trading, drop stores that closed or were heavily remodelled, and say whether online orders count.
Those rules matter because two companies’ comps are rarely measured in exactly the same way. Once you know which stores are in the base, the calculation itself is simple.
How to Calculate Same-Store Sales
Take this period’s sales from all qualifying stores, subtract the same stores’ sales in the matching period a year earlier, and divide by the earlier figure. The result is the comp, expressed as a percentage. Companies often split it into two drivers: traffic, meaning the number of transactions, and average ticket, meaning the amount spent per transaction.
Consider a coffee chain with 100 stores that each sold $2 million in a quarter, for $200 million in total. Over the next year it opens 20 new stores, which together add $30 million in that same quarter. The original 100 stores sell $196 million.
Total revenue rose from $200 million to $226 million, a 13% gain. Same-store sales fell 2%, from $200 million to $196 million in the comparable base. Breaking that down, transactions dropped 6% while the average ticket rose about 4% on higher prices, so fewer customers paid more. Expansion is hiding a weaker core business.
Same-Store Sales vs. Total Revenue Growth
| Same-store sales | Total revenue growth | |
|---|---|---|
| Stores included | Only those open a full year or more | All stores, including new ones |
| What it shows | Demand at existing locations | Overall size of the business |
| Effect of openings | Excluded | Adds growth |
| Standard definition | None, set by each company | Set by accounting rules |
Both numbers belong in the analysis. Revenue growth tells you how fast the company is getting bigger, and comps tell you whether that growth rests on stores customers keep returning to.
Why Are Same-Store Sales Important for Traders?
For retail and restaurant stocks, the comp is often the number that moves the price on results day. Earnings can be lifted by cost cuts or a lower tax rate, but comps show demand directly. A comp miss against the consensus estimate can send shares lower even when profit beats forecasts.
Chipotle showed how fast comps can turn. After E. coli outbreaks linked to its restaurants in late 2015, comparable restaurant sales fell 14.6% in the fourth quarter and nearly 30% in the first quarter of 2016. New openings could not offset that: first-quarter revenue dropped 23%. The comp told investors that customers were staying away from restaurants they already knew.
Comparisons also depend on the base. When a chain laps a terrible quarter, such as the months after a food-safety scare, even a partial recovery produces a large positive comp. Analysts then use two-year stacked comps, adding the last two years’ figures together, to judge whether sales have actually returned to where they were before the shock.
The measure has weak spots. Price increases during periods of inflation can produce positive comps while fewer people shop, so always look at traffic. Calendar effects such as a moved holiday or an extra week in a fiscal quarter can add or remove several points. Closed stores leave the base, which means a chain shutting its worst locations can improve comps without selling more anywhere.
Key Takeaways
- Same-store sales measure revenue change at locations open for at least a year, removing the effect of new openings and closures.
- The comp splits into traffic and average ticket, which shows whether growth comes from more customers or higher prices.
- A chain can report rising total revenue while comps fall, because new stores can mask declining sales at existing ones.
- Each company defines its own comp base, including rules on remodels and online sales, so comparisons between companies need care.
- Inflation, calendar shifts and store closures can flatter comps, so traders check traffic and the company’s definition before trusting the headline figure.
Are comparable sales the same as same-store sales?
Yes. Comparable sales, comp sales and comps are other names for the same measure, although each company sets its own rules for which stores qualify.
What is a good same-store sales number?
It depends on inflation and the sector. Comps of 3% when prices are rising 4% mean shoppers are buying less in real terms, so compare the figure with inflation and with the company's own guidance.
Do online sales count in same-store sales?
At many retailers they do, either fully or when orders are picked up or shipped from a store. Check the company's definition, because including online sales can lift comps even when store traffic falls.
Can revenue grow while same-store sales fall?
Yes. New stores add revenue that comps exclude, so a chain opening many locations can report rising total sales while its existing stores decline.
