The published method.
Nobody in Indian employee transport publishes how their commuting-emissions number is produced. We do, because a figure you cannot check is one an assurance provider will not accept.
Questions on the method? ↗The formula
The formula, in full.
where
distance = metered trip kilometres for the period
energy used = kWh drawn to run those trips
ICE factor = kg CO₂e per km for the equivalent ICE vehicle
grid factor = kg CO₂e per kWh for the electricity used
The reported figure is emissions from the trips as run (grid factor × energy). The avoided figure, the “that didn’t happen this month” number the film shows, is the difference against the ICE baseline, reported separately so the two are never conflated.
Grid factor
The grid emission factor.
The electricity carbon intensity applied to energy used.
| Item | Value / source |
|---|---|
| Factor used | 0.71 kg CO₂ / kWh |
| Source | Central Electricity Authority (CEA), CO₂ Baseline Database for the Indian Power Sector |
| Year / version | Latest published CEA version, re-checked each quarter |
| Grid vs. supply-specific | National grid average, because vehicles draw from the grid; a supply-specific factor is used only where a client’s charging is on a verified dedicated renewable supply. |
The counterfactual
The ICE baseline, and why.
We do not flatter it.
The avoided figure needs a counterfactual: what the same journey would have emitted in a comparable internal-combustion vehicle. We state the baseline vehicle class and the per-kilometre factor we apply, and we do not flatter it, an inflated baseline inflates the avoided number, which is exactly the kind of overstatement assurance is designed to catch.
Baseline vehicle class: a comparable diesel sedan or bus for the trip type. We apply a per-kilometre CO₂e factor drawn from published Indian emission factors for the vehicle class, and state the exact figure and source on each statement rather than choosing a flattering one.
The data source
Primary data, not estimated.
Distance and energy are not estimated. Distance is the metered trip kilometres captured by the operation; energy is the kWh recorded charging the vehicles that ran them. Because the trips are ours, both inputs are primary data rather than survey extrapolation.
The boundary
The boundary definition.
The figure covers the trips operated under the Thoyz service for the reporting period, for the client in question. It excludes commuting done outside the service. The boundary is stated on the statement itself so the scope of the number is never ambiguous.
Known limitations
Stated before anyone asks.
An honest limitation is worth more than a hidden one.
No method is perfect, and pretending otherwise is a credibility cost, not a saving. The grid factor is an average and does not capture the exact generation mix at the moment of charging. The ICE baseline is a modelled counterfactual, not a measurement of an alternative that did not occur. Distance is captured to the resolution of the operational record.
We list these so that a reviewer sees we understand the edges of the number, not to undermine it, but because an honest limitation is worth more than a hidden one.
Version history
Every change to this method is dated.
| Version | Date | Change |
|---|---|---|
| v1.0 | September 2026 | Initial published method. |
This method was last verified against its cited sources in September 2026. Sources are re-checked each quarter.
Questions on the method? We’ll answer them in detail.
Nobody in Indian employee transport publishes how their commuting-emissions number is produced. We do, and we’ll walk you through any part of it.
Talk to us ↗