You’re being asked for your carbon footprint. Have the number this week.

SB 253 (the Climate Corporate Data Accountability Act) requires entities that do business in California with at least $1 billion in annual revenue to disclose their Scope 1 and Scope 2 greenhouse-gas emissions, with the first reports proposed for 10 November 2026, not yet final. Scope 3 reporting follows in 2027. Your ThemisIQ report gives you the Scope 1 and Scope 2 figures to enter on the California Air Resources Board (CARB) SB 253 reporting platform, built on the GHG Protocol and traceable to your source documents where you've uploaded them. The Scope 3 Calculator, included with GHG Emissions, gives you your Scope 3 figures for when SB 253 requires them. If you’re under that threshold, SB 253 may not apply to you directly, but your larger customers and investors who are in scope will often ask you for your emissions so they can complete their own value-chain reporting.

Yes, that’s exactly who this is built for. You don’t need to be subject to SB 253 to produce a credible emissions figure. ThemisIQ gives you a Scope 1 and Scope 2 number on the same GHG-Protocol basis your customer’s or investor’s reporting references, so what you hand back fits straight into their process.

It depends on who’s asking and under which framework. First, the three scopes:

• Scope 1: direct emissions from sources you own or control, like on-site fuel combustion and company vehicles.
• Scope 2: indirect emissions from the energy you buy: electricity, heat, and steam.
• Scope 3: all other indirect emissions across your value chain, organized into 15 categories: purchased goods and services, business travel, transportation, use of sold products, financed emissions, and more.

Which scopes apply to you?

Scope 1 and Scope 2 only, for now: California’s SB 253 requires just Scope 1 and Scope 2 for its first reports, proposed for 10 November 2026 and not yet final.

Scope 3 required: SB 253 adds Scope 3 from 2027 (covering the previous fiscal year’s data), with CARB still finalizing the details. The EU’s CSRD (ESRS E1) requires your material Scope 3 categories, and IFRS S2 requires Scope 3 as well, with first-year transition relief in many adopting jurisdictions.

If you need it, we’ve got it. ThemisIQ works to the GHG Protocol Scope 3 Value Chain standard, including PCAF-aligned financed emissions for Category 15, with supplier data collected directly through our portal. All 15 categories recorded and reported. 9 calculated by a named method, 6 reported from your own figures. See the Supply Chain module for primary supplier data →

Your energy and fuel records: typically electricity bills and any natural gas, heating-fuel, or vehicle-fuel statements for your reporting year. You can enter annual or monthly totals. If your bills are incomplete or you’d rather not add them up yourself, the Bill Review add-on handles it for you.

Once your totals are in hand, the calculation is real-time: you watch your tCO₂e update as you type, and you can have a finished report the same afternoon. The “minutes, not months” comparison is against traditional consulting engagements, which typically run a quarter or more.

Every calculation runs on the GHG Protocol Corporate Accounting and Reporting Standard: the basis required by SB 253, CDP, ESRS E1, GRI 305, and IFRS S2. We apply IPCC AR6 global warming potentials for every framework, SB 253 included (SB 253 used AR4, to match CARB’s program, until June 2026), and country-matched emission factors (US EPA, Canada’s ECCC, UK DEFRA, and IPCC and EEA factors for the EU), all versioned, vintage-stamped, and cited in every export. Scope 2 supports both location-based and market-based (residual-mix) accounting per the GHG Protocol Scope 2 Guidance, and workings are documented per source and aligned with ISO 14064-3 and ISAE 3410, so your numbers hold up under limited or reasonable assurance. For requests that require independent sign-off, the GHG module lets you invite a third-party verifier to a read-only view of your inventory and its full audit trail, by secure link. Full detail is on our methodology page.

Build your inventory once, and ThemisIQ produces the report for whichever framework you’re asked for, with full coverage for SB 253, CDP, ESRS E1 (under the EU’s CSRD), IFRS S2, the GHG Protocol Corporate Standard, EcoVadis, and GRI 305, plus SBTi for inventory and near-term & net-zero target setting. What each one asks for differs:

Frameworks that start with Scope 1 and Scope 2

• SB 253: Scope 1 and Scope 2 for the first reports, proposed for 10 November 2026 and not yet final; Scope 3 is expected from 2027.
• GHG Protocol Corporate Standard: Scope 1 and Scope 2 required; Scope 3 is reported under the separate Corporate Value Chain (Scope 3) Standard.

Frameworks that require Scope 1, Scope 2 and Scope 3

• ESRS E1 (CSRD): gross Scope 1 and Scope 2, plus your material Scope 3 categories.
• IFRS S2: Scope 1, Scope 2 and Scope 3, with first-year transition relief to defer Scope 3 by a year in many jurisdictions.
• CDP: Scope 1, Scope 2 and Scope 3, with Scope 3 increasingly expected and scored.
• GRI 305: Scope 1 (305-1), Scope 2 (305-2) and Scope 3 (305-3).
• SBTi: a Scope 3 target is required where Scope 3 is a significant share of your total (over 40% under current criteria).

EcoVadis rates you across all three scopes: reporting Scope 3 strengthens your score rather than being a hard requirement.

Scope 3 is part of the GHG module, worked to the GHG Protocol Value Chain standard. All 15 categories recorded and reported. 9 calculated by a named method, 6 reported from your own figures. The Supply Chain module adds primary supplier data collection for Category 1. Because these frameworks’ thresholds and timelines shift often, we keep the mappings current and stamp the exact basis used on every export.

A fraction of what consultants and legacy platforms charge. Scope 1 and Scope 2 can be calculated free, in your browser, without an account. Create a free account to get your results by email and keep your calculation. Scope 3, document uploads, Trends, SBTi targets, verifier sharing, report downloads and more than one inventory need a GHG plan.

• Calculate & preview your Scope 1 and Scope 2 emissionsFree
• GHG module: Scope 1, Scope 2 and Scope 3 report, any frameworkfrom $550*
• Bill Review: we read the figures from your bills, and you approve each one. Includes Verification Readiness.from $600 a year, all data sources included
• Advisory: dedicated specialists guide youCustom
• Scope 3: full value chain, included in the GHG moduleSee module →

* All prices in USD. The GHG module is priced by company size, with unlimited locations on every plan: $550 a year for 1 to 49 employees, $1,750 a year for 50 to 249 employees and $4,550 a year for 250 to 999 employees; organizations with 1,000 employees or more are quoted. Plans are sized using EU company size categories.

No. A plan gives you 12 months of access and does not renew or charge you automatically. We email you 30 days before it ends so you can opt in to another year. Buying more than one module? The multi-module discount is applied automatically at checkout, with nothing to ask for. We always show you exactly what you’re paying for before you confirm, and every payment is handled securely by Stripe.

Yes. Pay by card, or request an invoice, at any amount. Prefer to pay by invoice? Request an invoice once you’ve chosen your modules. We’ll send an invoice you can forward to your accounts team, and once it’s paid we’ll email you to confirm your modules are unlocked.

Yes. Scope 1 and Scope 2 can be calculated free, in your browser, without an account. Create a free account to get your results by email and keep your calculation. Nothing is saved until you create a free account, which keeps one Scope 1 and Scope 2 calculation. Scope 3, document uploads, Trends, SBTi targets, verifier sharing, report downloads and more than one inventory need a GHG plan. Payment is handled securely by Stripe.

Security is foundational here. Your data belongs to you: we never sell or share it. Everything is encrypted in transit (TLS 1.2+) and at rest (AES-256), hosted on infrastructure provided by Supabase on AWS, which holds SOC 2 Type II certification, with row-level security that isolates your data from every other customer at the database level. If you use the Bill Review add-on, the bills you upload are sent to our AI provider, Anthropic, to read the figures off them. That is the only place we use AI. Payments run through Stripe (PCI DSS Level 1), so we never see your card details. You can export your reports at any time and ask us to delete your data, and we comply with PIPEDA, Quebec Law 25, GDPR and UK GDPR, and CCPA. Full detail is on our trust & data page.

Yes, wherever in the world your business operates, ThemisIQ works for you. Your inventory is built from physical energy and fuel data (kilowatt-hours, therms, cubic metres, Mcf, litres), and we automatically apply the correct local emission factors: US EPA in the United States, ECCC in Canada, DEFRA in the UK, and IPCC and EEA factors across the EU, with global fallbacks for everywhere else. The same inventory can then be reported against whichever framework an international customer, investor, or regulator asks for: SB 253, CSRD (ESRS E1), IFRS S2, CDP, GRI 305, and more. Collect once, comply everywhere.

ThemisIQ is a Canadian company (ThemisIQ Compliance Inc.) built on the belief that rigorous, audit-ready compliance reporting should be within reach of businesses of every size. It was founded by a former Big 4 and sustainability practitioner who has worked with organizations across the spectrum, from the world’s largest brand names to the smallest startups. That range is the whole idea: the same methodology the giants rely on, priced and packaged so any business can pick it up. We implement recognized international standards correctly and keep them current, guided by a single principle: accuracy forms trust.

We’re happy to help. Email us at hello@themisiq.co and we’ll get back to you.