Franchise Encroachment: The Cannibalization Math Behind Every New Unit

Franchise encroachment shows up in a lawyer's office, but it starts in a development meeting. By the time a franchisee files a claim that the brand opened a new unit too close, the damage is already booked: a nearby location watching 8 to 12 percent of its same-store sales walk over to a unit with the identical sign on the door. The lawsuit is the symptom. The cause is a development decision where nobody separated net new revenue from revenue the system already had. Franchise encroachment is a math problem before it is a legal one, and the math is easy to skip, which is exactly why so many teams skip it.

What encroachment actually is, and what it is not

Site selection and encroachment ask two different questions. Site selection asks whether a location can succeed on its own: enough traffic, the right co-tenants, a trade area that supports the model. A site can pass that test cleanly and still be a bad unit to build, because the question encroachment asks is the one site selection ignores. When the new unit succeeds, whose customers is it spending to get there?

The mechanism is cannibalization, and the number that measures it is the sales transfer rate: the share of a new unit's volume that came from existing locations rather than from new demand. If a new store does $1.2 million in year one and $300,000 of that was previously ringing up two miles away at a sister unit, the cannibalization rate is 25 percent. The brand counted a million-dollar opening. The system gained $900,000.

The only number that decides it: net new versus transferred

Most retailers treat a cannibalization rate of 10 to 20 percent as the cost of doing business, acceptable when the new unit still adds positive incremental profit to the system. Above 20 percent gets flagged as high. Past 30 percent, the opening is in danger territory, where the new unit's margin has to do real work just to cover the hole it punched in its neighbor. In the worst cases, more than half of a new store's sales are pulled straight from nearby locations, and the network adds a building, a payroll, and a rent obligation to capture revenue it already had.

This is why a new unit can post strong numbers and shrink the system at the same time. Think of it like moving a balance from one credit card to a second one. The new statement looks active, but the household owes exactly what it did before, and now it is paying two annual fees. A development team that tracks openings and total unit count will never see this. The map looks like growth. The system contribution is flat or negative.

Overlap hides in drive time, not on the territory map

The reason teams miss the transfer is that they measure territory with the wrong instrument. A franchise territory drawn as a radius or a set of ZIP codes looks clean on a map and tells you almost nothing about customer behavior. Customers do not shop by polygon. They shop by convenience, which means drive time.

When two units share more than 20 to 25 percent of their drive-time trade area, revenue transfer is close to guaranteed, regardless of what the territory lines say. Existing locations within a 10-minute drive of a new opening routinely give up 8 to 12 percent of same-store sales. A map can show two territories that barely touch while their real catchment areas, the places customers actually drive from, overlap heavily on the side where the highway runs. The line on the map is not the boundary. The commute is.

Why Item 12 will not settle it

When a franchisee feels encroached on, the first place anyone looks is Item 12 of the Franchise Disclosure Document, the section that defines territory rights. The problem is what most operators find there. Exclusive territories, where neither the franchisor nor another franchisee may open a competing unit, have become less common because they cap how fast a brand can grow. Protected and non-exclusive arrangements are now the norm, and they carry carve-outs that give the franchisor more room to place a new unit than the operator assumed when they signed.

So the operator who loses 30 percent of revenue to a sister location may have grounds to sue, and a network that pushes a franchisee that far has created a legal exposure worth taking seriously. But litigation is the worst available outcome for both sides. The franchisee bleeds margin and legal fees while still operating the unit. The franchisor spends goodwill it cannot rebuild and signals to every other operator in the system that growth comes at their expense. By the time Item 12 is the topic, both parties have already lost. The decision that mattered happened in development, before anyone needed a lawyer.

The cannibalization test to run before granting a unit

The fix is not complicated, it is just unglamorous, which is why it gets dropped under growth pressure. Before granting the next unit, a development team can run four checks in order.

First, model the drive-time overlap between the proposed site and every existing unit within roughly 15 minutes, not the radius, the actual drive. Second, estimate the sales transfer rate from that overlap and from comparable openings the brand has already done. Third, calculate net system contribution: the new unit's projected profit minus the projected profit decline at the affected units. A positive number means the system grows. A number near zero means the brand is buying its own revenue at full construction cost. Fourth, check whether the affected operator's unit stays comfortably above its break-even after the hit. A unit that was healthy at $1 million and slides toward its break-even line at $880,000 is a future dispute regardless of what the contract permits.

If the network has done a dozen openings near existing units, it already owns the data to calibrate every one of these estimates. The blocker is rarely capability. It is that nobody is asked to produce the number before the committee votes.

Grow the system, not the map

An open spot on the territory map is not the same as open demand in the market. The development question worth answering is not whether the brand has room to place a unit, it is whether the next unit adds demand or just redistributes the demand the system already serves. Tools like Revscale's franchise intelligence layer can model drive-time overlap and surface sales-transfer risk across a network before a committee signs off, but the discipline matters more than any tool: run the cannibalization number before you build, not after the complaint arrives.

Franchise encroachment is the name everyone uses after the fact, once the unit is open and the neighbor is angry and the lawyers are involved. Before the fact, it is something far more manageable. It is one number, the sales transfer rate, that a team chose not to run.