Franchise Same-Store Sales vs System-Wide Sales: Why Both Can Be True at Once

Picture two reports on the same franchise brand for the same quarter. One says system-wide sales rose 10.0 percent. The other says same-store sales fell 5.6 percent. Both are accurate (they are the figures in Wingstop's fiscal third quarter 2025 earnings release), because franchise same-store sales growth measures whether units that were already open are selling more, while system-wide sales growth also counts every unit that opened since.

That gap matters because opening pace can carry a headline while established units slide, and the number your development team repeats to candidates should say which one it is.

What is franchise same-store sales growth, and how does it differ from system-wide sales growth?

Franchise same-store sales growth is the year-over-year change in sales for units open long enough to belong to a comparable base. System-wide sales growth is the change in sales across every unit, including ones that opened during the year. The first number answers whether existing units are growing. The second answers whether the network is.

The comparable base, often called the comp base, is the set of units included in a same-store calculation, and each brand sets its own entry rule. When every unit open last year sits in the comp base, the two measures connect through simple arithmetic: system-wide growth equals same-store growth plus the sales from new units, expressed as a share of last year's total. Real networks have closures, acquisitions and units still ramping, so the split is approximate, and it works best as a diagnostic.

Wingstop and Twin Hospitality: two brands where unit growth carried the headline

Wingstop reported system-wide sales of $1,356 million for the thirteen weeks ended September 27, 2025, against $1,233 million a year earlier, an increase of 10.0 percent. In the same release, domestic same store sales fell 5.6 percent. The restaurant count rose from 2,458 to 2,932, or 19.3 percent, so the number of restaurants grew nearly twice as fast as total sales.

The gap between the two headline figures is 15.6 percentage points, but it is not all new domestic units. System-wide sales include international restaurants, while the same store figure is domestic and counts only restaurants open at least 52 full weeks.

Twin Hospitality Group's release for fiscal 2024 shows the same pattern. For the 52 weeks ended December 29, 2024, compared with a 53-week prior year, system-wide sales growth was 25.3 percent while Twin Peaks same-store sales declined 3.1 percent. The release reports the system figure for all stores and the same-store figure for the Twin Peaks brand, so the two numbers do not describe an identical set of units. Read the scope line before the percentage.

Both releases define the terms they use, which is what makes this comparison possible. Neither number alone tells you whether the average unit is healthier.

The arithmetic: 100 units, 20 openings and a hidden decline

The numbers below are illustrative and do not come from any real brand. Start with 100 units that each sold $1.00 million last year, so last year's system sales were 100 × $1.00 million = $100.0 million. This year the same 100 units average $0.96 million, which is $96.0 million. Twenty new units open during the year and average $0.60 million each for their partial years, adding 20 × $0.60 million = $12.0 million. System sales are $96.0 million plus $12.0 million = $108.0 million.

System-wide growth is ($108.0 million minus $100.0 million) ÷ $100.0 million = 8.0 percent. Same-store growth, measured on the 100 units open for the whole comparison, is ($96.0 million minus $100.0 million) ÷ $100.0 million = negative 4.0 percent. The new units contribute $12.0 million ÷ $100.0 million = 12.0 points, and negative 4.0 plus 12.0 returns the 8.0 percent headline.

Now remove the openings. If no units open next year and all 120 units slip another 4.0 percent, system sales go from $108.0 million to 0.96 × $108.0 million = $103.68 million, a 4.0 percent decline with nothing left to cover it. Royalties show the same split. At a hypothetical 6 percent royalty, income rises from $6.00 million to $6.48 million this year, yet the 100 established units paid $0.24 million less than they did the year before.

Why can't you compare one brand's same-store sales to another's?

Each brand sets its own comparable base, so the same label covers different units. Wingstop counts restaurants open at least 52 full weeks. Twin Hospitality counts stores open at least eighteen months. A shorter window pulls newer units into the comparison, and Twin Hospitality says new stores often open above average volume before settling after three to six months.

Even inside one brand the choice of units moves the answer. In the same third quarter, Wingstop reported company-owned domestic same store sales growth of 3.8 percent, which is 9.4 points above the domestic system-wide figure of negative 5.6 percent. Inside your own network the same logic applies to individual units: a year-one location and a ten-year location should not share a benchmark, which is why peer groups built by age band beat a single league table.

What does the FTC Franchise Rule say about quoting same-store sales to candidates?

Under the FTC Franchise Rule, a franchise seller may not give prospective franchisees a financial performance representation unless it has a reasonable basis and written substantiation, and the representation appears in Item 19 of the disclosure document. Whether a same-store sales figure counts as one depends on how it is presented, so confirm with counsel first.

That requirement is in 16 CFR 436.9(c), as published on eCFR and current as of October 22, 2026. The Rule defines a financial performance representation in 16 CFR 436.1(e) as any oral, written or visual representation to a prospective franchisee that states, expressly or by implication, a specific level or range of actual or potential sales, income, gross profits or net profits. The phrase expressly or by implication, and the inclusion of oral statements, mean a figure a sales rep says on a call can be held to the same test as one printed in a deck. This section covers the federal rule only.

Most disclosure documents say less than candidates want to know, as our look at where Item 19 disclosures usually stop explains. The same test applies to automated channels, and a post on what an AI chatbot may say about income covers how an assistant can cross that line.

Three numbers to report together, and the rule that flags trouble

Report three figures side by side every quarter: same-store sales growth on a stated comp window, system-wide sales growth, and the gap between them in percentage points. The gap is the share of growth contributed by units outside the comp base.

Then apply a screening rule. This is a heuristic for internal review, not an industry standard: when same-store growth is negative and the gap is more than twice its size, expansion is covering a decline. Wingstop's third quarter gives 15.6 ÷ 5.6 = 2.8 times. The 100-unit example gives 12.0 ÷ 4.0 = 3.0 times.

Last, test the window. Recompute same-store growth with a 52-week entry rule and an 18-month entry rule, the two spans quoted above. If the results differ by more than a point, the definition is doing work, so pick one, state it in every report and keep it.

Pull monthly sales by unit for the last eight quarters, tag each unit's opening date and run the three numbers for each quarter. The first quarter that trips the rule marks when expansion started covering for existing units, and that is the quarter to examine unit by unit.

Sales growth is an outcome, and Revscale's network intelligence layer tracks inputs to that outcome, such as pipeline, response behavior and lead quality, at every location. Franchise same-store sales tell you whether the units you already have are healthy, and system-wide sales tell you how fast you are adding more, so a brand needs both numbers and a written rule for which units count.

This is general information, not legal, tax or financial advice; confirm specifics with a qualified advisor.