Direct Answer
Comparable sales (often shortened to "comps") measures the percentage change in sales at business locations or units that have been operating for a comparable period in both the current and prior year, excluding contributions from new openings or closures. It's the retail and restaurant-sector term most closely related to same-store sales, and it's used to isolate organic demand growth from growth that comes purely from adding new locations.
Key Takeaways
- Comparable sales only counts locations open for a comparable period in both the current and prior year.
- New store openings and closures are excluded, so the metric isolates organic demand growth from expansion-driven growth.
- Comps is the retail and restaurant-sector term most closely related to same-store sales - the two concepts describe the same underlying idea.
- A company can post strong total revenue growth from new units while comparable sales are flat or negative.
- There is no single regulatory standard for the inclusion window; each company discloses and applies its own definition.
- Comparable-sales figures are most meaningful compared against a single company's own history, since methodology varies across companies.
What Is Comparable Sales?
Comparable sales measures the percentage change in sales at business locations or units that have been operating for a comparable period in both the current and prior year, excluding contributions from new openings or closures. The purpose of the exclusion is straightforward: total revenue growth mixes together two very different sources of growth - more demand at existing locations, and simply having more locations - and comparable sales separates the two by holding the store base constant across the comparison.
A location typically has to clear a minimum tenure (commonly stated in a company's earnings release or filing footnotes) before it's folded into the comparable base. Until then, its sales show up in total revenue but not in the comps figure. A store that closes during either period is likewise removed from both the current-period and prior-period comparable base, so its sales don't distort the percentage change in either direction.
Comps is the retail and restaurant-sector term most closely related to same-store sales; the two labels describe the same underlying calculation and are frequently used interchangeably in earnings commentary. E-commerce and digital-only revenue streams are sometimes included or excluded from a company's comps definition depending on how the company chooses to draw the boundary around "comparable" - another reason the specific methodology disclosed by each company matters when interpreting the number. For the broader context of how growth metrics fit into fundamental analysis, see the Growth Metrics hub.
Why Does Comparable Sales Matter to Investors?
Total revenue growth answers "did the company sell more this period," but it doesn't say whether that growth came from the business getting healthier or simply getting bigger. A chain that opens dozens of new locations in a year can report rising total revenue even while every existing location is losing customers to a competitor - the new-store sales mask the underlying erosion until the expansion slows down and there are no more new units to paper over the trend.
Comparable sales removes that ambiguity by holding the location count fixed. A positive comp means the locations that were already open are, in aggregate, selling more than they did a year earlier - evidence of real demand growth, whether from more foot traffic, higher average transaction size, or both. A negative comp alongside positive total revenue growth is a specific and useful warning sign: it says the company's growth is coming entirely from adding capacity, not from the existing footprint getting more productive, which is a much less durable growth pattern once the expansion pace inevitably slows.
Analysts also use comps trends over several quarters to gauge momentum and to compare a retailer or restaurant chain against peers on a like-for-like basis, since two chains with very different store counts and different expansion rates can still be compared directly on the percentage change in their existing-location sales. The Company Fundamentals Comparison tool can be used to line up growth metrics like this across multiple companies at once.
Worked Hypothetical Example: Calculating Comparable Sales
A hypothetical retail chain operated 120 store locations at the start of the prior fiscal year. Of those, 105 locations were open for the full prior-year period and remained open for the full current-year period, making them comparable locations under the company's stated policy. The remaining 15 locations either opened during the period or had not yet cleared the comparable-tenure threshold, so they're excluded from the comps calculation on both sides.
- Comparable-location sales, prior year: $840 million
- Comparable-location sales, current year: $882 million
- Non-comparable (new-location) sales, current year: $58 million (excluded from the comps calculation)
The comparable sales calculation uses only the two comparable-period figures:
| Step | Calculation | Result |
|---|---|---|
| Change in comparable sales | $882M − $840M | $42 million |
| Comparable sales growth | $42M ÷ $840M | 5.0% |
The chain's comparable sales grew 5.0% year over year. As a check on the arithmetic: 5.0% of $840 million is $42 million ($840M × 0.05 = $42M), and $840M + $42M = $882M, which matches the stated current-year comparable figure - the two directions of the calculation agree.
Now compare that to the chain's total revenue picture. Total current-year sales across all 120 locations would be $882M (comparable) + $58M (new, non-comparable) = $940 million, versus $840 million in the prior year - a total revenue increase of $100M ÷ $840M ≈ 11.9%. The headline growth rate looks considerably stronger than the 5.0% comp, and the gap between the two numbers is entirely attributable to the 15 new locations. Neither number is "wrong" - they answer different questions. Total revenue growth of 11.9% describes the whole business including expansion; comparable sales growth of 5.0% describes how the pre-existing store base performed on its own.
- This example is hypothetical - figures are illustrative, not drawn from any real company's disclosures.
- Real companies define their comparable-tenure threshold and inclusion rules in their own filings; verify a specific company's methodology before comparing its comps figure to another company's.
- A single period's comp does not represent a full business cycle - review multiple periods before drawing a conclusion about a trend.
Limitations and Common Mistakes
Comparable sales is not a standardized, audited GAAP or IFRS metric - it's a company-defined operating metric, so the exact rules for what counts as "comparable" (tenure threshold, treatment of relocated or remodeled stores, treatment of e-commerce, treatment of temporary closures) vary by company and are not guaranteed to be consistent across an industry. Treating two companies' comps figures as perfectly apples-to-apples without checking each company's disclosed methodology is a common mistake.
Comps growth also mixes together price and volume. A retailer can post a positive comp purely from raising prices while unit volume (the number of items or transactions) actually declines, or vice versa - the single percentage doesn't distinguish the two unless the company separately discloses transaction count or average ticket size. A remodel, temporary closure for renovation, or a shift between store formats (a large-format store converting to a smaller one, for example) can also distort a single period's comp even under a consistent methodology, so an unusual spike or drop is worth checking against known one-time events before treating it as a change in underlying demand. Finally, comps is inherently a mature-business metric - it says little about a company still in its early, high-new-unit-growth phase, where total revenue growth and unit economics of new locations matter more than the comparable base.
Frequently Asked Questions
What is comparable sales?
Comparable sales, often shortened to "comps," measures the percentage change in sales at business locations or units that have been operating for a comparable period in both the current and prior year, excluding contributions from new openings or closures. It is the retail and restaurant-sector term most closely related to same-store sales, and it exists to isolate organic demand growth from growth that comes purely from adding new locations.
How is comparable sales growth calculated?
Comparable sales growth is calculated by taking total sales from only the locations that were open for the full comparable period in both the current year and the prior year, then computing the percentage change between the two figures: (current-period comparable sales minus prior-period comparable sales) divided by prior-period comparable sales. Locations that opened, closed, or underwent a major remodel during either period are typically excluded from both sides of the calculation until they reach comparable status.
What is the difference between comparable sales and total revenue growth?
Total revenue growth reflects sales from every location, including newly opened ones, so it can rise even if existing locations are losing customers, as long as enough new units are added. Comparable sales strips out new-location contributions entirely, isolating whether the base of already-established locations is growing or shrinking. A company can post strong total revenue growth from expansion while comparable sales are flat or negative, which is a meaningfully different signal about underlying demand.
Why do companies define their own comparable-sales inclusion period?
There is no single regulatory standard dictating exactly how many months a location must be open before it counts as comparable, so companies set their own policy (commonly a period stated in the earnings release or filing footnotes) and are expected to apply it consistently period to period. Because the exact inclusion rule varies by company, comparable-sales figures are best compared to a single company's own history and disclosed methodology rather than assumed to be calculated identically across every company that reports the metric.
How do companies decide when a location enters the comparable base?
Each company sets its own qualifying period, commonly somewhere between twelve and eighteen months of operation, and the choice affects the reported figure because new locations often grow fastest. A shorter qualifying period brings faster-growing units into the base sooner. The definition is disclosed and differs enough between companies to make cross-company comparison unreliable.
How are temporarily closed or remodelled locations handled?
Practice varies: some companies exclude locations closed for remodelling and others include them with their reduced sales, and treatment of extended closures differs again. During periods with widespread disruption, these choices materially affect the reported figure. Companies generally disclose their treatment, and a change in treatment between periods breaks the comparison.
What does the split between transaction count and average transaction value add?
It separates whether growth came from more customers or from each customer spending more, which have different implications for durability. Growth entirely from price increases with declining transaction counts indicates a shrinking customer base being monetised harder. Companies that disclose the split make this visible, and where they do not the direction can sometimes be inferred from commentary.
How does e-commerce revenue affect a comparable sales figure?
Companies differ on whether online sales are included in the comparable base and how sales fulfilled from a location are attributed. Including online revenue in a store comparable figure can flatter it substantially when digital is growing faster. The attribution policy is disclosed and is one of the more consequential definitional choices in this metric.
How do calendar shifts distort a comparable sales figure?
A reporting period containing a different number of weekends, a shifted holiday, or an extra week compared with the prior year produces a difference that has nothing to do with underlying demand. Retailers frequently adjust for this and describe the effect. Where the adjustment is not made, comparing a fifty-three week year against a fifty-two week one overstates growth by roughly the extra week.