Scope 1 vs. Scope 2: The Ambiguous Cases

Once you've got the basic distinction down (you burned it, it's Scope 1; someone else burned it to make what you bought, it's Scope 2), a handful of specific situations still don't sort cleanly. These are the ones that come up most often once people are actually building an inventory, not just learning the definitions.

Leased vehicles

Whether a leased vehicle belongs in your Scope 1 inventory depends on which organizational boundary approach you're using, not on who holds the title. Under an operational control approach (the one most companies use), a leased vehicle you operate day to day counts as yours, even though you don't own it, because you're the one making the operating decisions and burning the fuel. Under a financial control approach, it depends more on the specific lease structure, similar to how finance leases and operating leases get treated differently in accounting. If you haven't explicitly picked your boundary approach yet, this is one of the places that decision actually changes your answer, not just your paperwork.

Electric vehicles in your fleet

This one trips people up because it feels like it should be simple: your fleet is Scope 1, so an EV in your fleet should be Scope 1 too. It isn't, at least not in the way people expect. The vehicle itself sits in the fleet category conceptually, but an EV doesn't combust fuel. It draws electricity, and the electricity you charge it with is purchased power. That makes EV charging a Scope 2 item, calculated the same way as the electricity powering your building, not a Scope 1 mobile combustion item like your gas and diesel vehicles. If your fleet is mixed, you're actually running two different calculations depending on the vehicle, not one.

Purchased steam, heat, or cooling

If your facility is on a district energy system, pulling steam, heat, or chilled water from an outside supplier rather than generating it on-site, that's Scope 2, not Scope 1. It feels like it should be Scope 1 because it's arriving at your building the way gas or fuel would, and it's easy to lump it in with "things we burn here." But the emissions happened at the supplier's plant, not yours, which is exactly the same logic that makes purchased electricity Scope 2. If you generate your own steam or heat on-site by burning fuel yourself, that's a different situation entirely: that's Scope 1 stationary combustion.

Employee vehicles used for business travel

Mileage reimbursement for an employee's personal car feels like it belongs with your fleet, but it isn't Scope 1 or Scope 2 at all. It's Scope 3. The distinction that matters here is ownership and control: your fleet vehicles are yours, so the emissions are direct. An employee's personal car isn't yours, isn't under your operational control, and would exist and be driven regardless of your business, so even though you're paying for the mileage, the emissions sit in your value chain (Scope 3), not your direct operations.

None of these are hard once you know the underlying rule: ownership and control decide Scope 1, purchased energy decides Scope 2, everything else that isn't yours but touches your business is Scope 3. The checklist walks through the more common categories in order; these four are the edge cases worth having settled before you get there.