Why do Scope 3 emissions matter?

Scope 3 emissions matter because they are the part of the corporate carbon account that regulators, investors and employees have all started to scrutinise at once and for most employers, commuting is the one line within Scope 3 they can genuinely move.

For decades, employee commuting was treated as a private matter. That position no longer holds as three things have changed:

1. UK regulation is tightening. Streamlined Energy and Carbon Reporting (SECR) has been mandatory for large UK companies and LLPs since April 2019, and in February 2026, the Department for Business and Trade went further, publishing the UK Sustainability Reporting Standards (UK SRS), built on the ISSB's IFRS S1 and S2. For now, these standards are voluntary. However, the FCA is consulting on rules that would require roughly 515 listed companies to report against them for accounting periods beginning on or after 1 January 2027, with Scope 3 reported on a comply or explain basis (FCA, 2026). 
2. Investors and customers are asking. Procurement tenders, supplier questionnaires and B Corp recertifications routinely now ask for Scope 3 data and reduction plans. Companies which voluntarily disclose emissions data generally hold greater market value than comparable firms that stay quiet (Matsumura et al., 2014; Matthews et al., 2025).
3. Talent expects it. More workers are beginning to view an employer’s climate performance as an important factor when choosing where to work, while also looking for opportunities to make a positive environmental impact at work, both individually and collectively (Deloitte, 2025).

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Where does employee commuting fit into Scope 3 emissions?

Employee commuting comes under the GHG Protocol Corporate Value Chain Scope 3 Standard Category 7, and according to Plan A, it can often account for 10–30% of an organisation's total emissions.

As Plan A's glossary on Scope 3 Category 7 suggests, despite this large overall percentage of total emissions, firms often fail to accurately measure and reduce them. If you are a software company, financial institution, or a similar organisation, commuting is probably the largest single emissions source you can directly influence through workplace policy.

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How can employers measure employee commuting emissions?

Employee commuting emissions are generally measured by collecting data on how far employees travel, how often, and by what mode of transportation, applying standard emission factors (such as those published annually by DESNZ) to convert these activities into kgCO₂e, which is exactly the method used by our DASH Rides carbon calculator.

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The GHG Protocol Scope 3 Category 7 guidance sets out three accepted calculation methods shown in the table below:

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As the same ten-mile commute can produce wildly different emissions depending on whether it's driven, taken by train or cycled, the guidance recommends pairing modelled data with a regular employee survey to capture the mode split. Getting a baseline is the easy part. The harder question is how you bring it down.

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Why is commuting one of the hardest Scope 3 categories to reduce?

Commuting is one of the hardest Scope 3 categories to reduce because employers do not directly control the activity. Employees choose how and from where they travel to work, which can be shaped by housing costs or local transport infrastructure rather than company policy.

A few specific reasons it's tougher than other Scope 3 categories:

• No direct lever. Unlike purchased goods and services (Category 1), where you can switch suppliers, or business travel (Category 6), where employers can mandate rail over flights, you can't tell an employee to move house or sell their car.
• It's deeply habitual. Commuting decisions are made once and repeated daily. Shifting behaviour requires both the right alternative and the right incentive to break habits.
• You can't easily tell what's working. Commuting data usually comes from staff surveys, and the year-on-year noise in those responses can mask genuine reductions. This makes it difficult to understand which interventions actually pay off.

This is why the most effective employer interventions focus on making low-carbon options easier and cheaper than the default, such as Cycle to Work schemes.

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How can cycling to work reduce Scope 3 emissions?

Cycling to work produces zero direct emissions, which means every commute switched from car to bike removes that journey's emissions from your Scope 3 Category 7 footprint entirely. Replacing a 5-mile round-trip commute in a car with cycling saves roughly 300 kgCO₂e a year, based on DESNZ's 2025 emission factor for the average petrol car. For fifty switchers, that's around 15 tonnes. Use the DASH Rides company carbon calculator to see what even a small shift to cycling could save your business in Scope 3 emissions.

The real question is how you shift commuting behaviour at scale. In the UK, the most established and tax-efficient lever is the Cycle to Work scheme.

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How much can a Cycle to Work scheme cut your commuting emissions?

How much a Cycle to Work scheme cuts depends on three factors, plus the provider running it.

• Baseline commute mix. Offices where the majority of staff currently drive have far more room to cut than those where most already take public transport.
• Scheme uptake. HMRC suggests 4% of adults in the UK have used the Cycle to Work scheme (HMRC, 2025). This take up is not held back not by a lack demand as employers who switch to DASH Rides see three to seven times that their previous uptake due to DASH’s ease of use and its broader range of products. 
• The mode being replaced. Switching a 5-mile car commute to cycling saves around 1.4 kgCO₂e a day, whereas switching the same journey from rail saves closer to 0.2 kg. The benefit depends entirely on what the bike replaces.

As a worked example: in a 500-person company where 15% of staff join the scheme, and each swaps two car commutes a week (a 6-mile round trip) for cycling, the saving comes to roughly 11 tonnes of CO₂e a year. That's a measurable, auditable reduction in Scope 3 Category 7, and a credible contribution towards a science-based (SBTi) target.

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How does Cycle to Work support your ESG strategy?

Cycle to Work supports all three pillars of ESG: environmental, social and governance, which few employee benefits offer. It cuts Scope 3 Category 7 emissions, improves employees' health and access to affordable transport, as well as producing the kind of auditable data that makes a sustainability disclosure credible.

Environmental impact

This is the most direct contribution, and the one this article has already focused on. Overall, every car commute switched to a bike is a real, immediate reduction in your Scope 3 Category 7 footprint. What makes it matter for reporting is the contrast with an offset or a supplier pledge, as this is an actual cut you can evidence.

Social impact

The social case is becoming increasingly relevant due to frameworks like the EU's CSRD, now requiring large firms to report on workforce wellbeing alongside emissions. This can also pull in smaller firms, who increasingly get asked for the same data by the larger customers they supply. A Cycle to Work scheme plays into this directly as it can:

• Improve physical and mental health. Cycling to work reduces sickness absence worth £63 per employee per year, with 70% of participants reporting better physical health and 65% improved mental wellbeing (Cycle to Work Alliance, 2024). 
• Widen access to affordable, reliable transport. Employees who switch from driving to cycling save an average of £1,262 a year (Cycle to Work Alliance, 2024).
• Support workplace wellbeing strategies, as 90% of employers report a positive impact on employee wellbeing from scheme participation (Cycle to Work Alliance, 2024).

Governance

On governance, the value is the data. A well-run scheme produces clean, auditable evidence such as uptake rates  that can go into ESG disclosures and board reporting. This matters as investors and regulators no longer just check whether you report Scope 3 but look at how credibly you're cutting it. A report with measurable outcomes is commonly considered far stronger than reporting an offset purchase.

For an ESG lead, that's the rare appeal: a single line item that pays into all three pillars at once.

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References:

Carbon Trust (2024) Scope 3 emissions: what are they and why do they matter? Available at: https://www.carbontrust.com/our-work-and-impact/guides-reports-and-tools/scope-3-emissions-what-are-they-and-why-do-they-matter (Accessed: 28 May 2026).

Financial Conduct Authority (2026) CP26/5: Aligning listed issuers' sustainability disclosures with international standards. Available at: https://www.fca.org.uk/publication/consultation/cp26-5.pdf (Accessed: 28 May 2026).

Matthews, L., Gerged, A.M. and Elheddad, M. (2025) 'Carbon disclosure, greenhouse gas emissions and market value of FTSE 350 firms – evidence from voluntary carbon disclosers versus non-disclosers', Accounting Forum, 49(4), pp. 778–802.

Deloitte (2025) 2025 Gen Z and Millennial Survey. Available at: https://www.deloitte.com/global/en/issues/work/genz-millennial-survey.html (Accessed: 28 May 2026).

Plan A (n.d.) Scope 3, Category 7: employee commuting emissions [glossary]. Available at: https://plana.earth/glossary/scope-3-category-7 (Accessed: 28 May 2026).

Bourke, M., Hilland, T.A. and Craike, M. (2018) 'An exploratory analysis of the interactions between social norms and the built environment on cycling for recreation and transport', BMC Public Health, 18(1), 1162. https://doi.org/10.1186/s12889-018-6075-4

(Matsumura, E.M., Prakash, R. and Vera-Munoz, S.C. (2014) 'Firm-value effects of carbon emissions and carbon disclosures', The Accounting Review, 89(2), pp. 695–724) or drop the in-text cite.

HM Revenue and Customs (2025) Evaluation of the Cycle to Work Scheme: quantitative and qualitative research. Available at: GOV.UK (Accessed: 29 May 2026).