🚨 CA SB 253 — First Scope 1 & 2 disclosures due August 10, 2026 ⚖️ CA SB 261 — Climate financial risk reports, enforcement pending Ninth Circuit 🇪🇺 CSRD Wave 1 — 500+ employee companies reporting now for FY2024 📋 CSRD Wave 2 — 1,000+ employee companies, FY2027 reporting 🔗 Scope 3 Supply Chain — Large companies need YOUR emissions data by 2027 💰 SB 253 Penalties — Up to $500,000 per reporting year for non-compliance 🚨 CA SB 253 — First Scope 1 & 2 disclosures due August 10, 2026 ⚖️ CA SB 261 — Climate financial risk reports, enforcement pending Ninth Circuit 🇪🇺 CSRD Wave 1 — 500+ employee companies reporting now for FY2024 📋 CSRD Wave 2 — 1,000+ employee companies, FY2027 reporting 🔗 Scope 3 Supply Chain — Large companies need YOUR emissions data by 2027 💰 SB 253 Penalties — Up to $500,000 per reporting year for non-compliance
Regulatory Deadline Approaching

Your biggest
customers need
your emissions
data. now.

California SB 253 and the EU's CSRD require large companies to report their suppliers' emissions. If you can't produce a GHG inventory, you risk losing the contract. CarbonCalc gives you a compliant Scope 1, 2 & 3 report in 15 minutes — no consultant required.

Calculate My Footprint → See the regulations
Compliance Deadlines Live
🇺🇸
CA SB 253 — Scope 1 & 2
$1B+ revenue companies doing business in CA
Aug 2026
18 months away
🇺🇸
CA SB 261 — Climate Risk
$500M+ revenue, enforcement pending appeal
TBD 2026
Injunction active
🇪🇺
CSRD Wave 1
500+ employee EU companies — reporting now
Active
FY2024 reports
🇪🇺
CSRD Wave 2 + Scope 3
1,000+ employee companies + supply chain data
2028
Start collecting now
🔗
Supply Chain Pressure
Your enterprise customers need your data for their reports
Now
Informal pressure today
The bottom line: Even if these laws don't apply to you directly, your Fortune 500 customers need your emissions data for their Scope 3 reporting. CarbonCalc makes it simple to provide it.

The supply chain effect

The law hits
big companies.
You feel it.

Large enterprises required to report Scope 3 emissions must collect data from every vendor, supplier, and partner in their value chain. That means you. CarbonCalc makes it fast, free to start, and credible.

→ Walmart, Target, Apple, and thousands of large CA companies are legally obligated to report supplier emissions
→ EU companies under CSRD face audit of their entire supply chain — including US-based SMB suppliers
→ Suppliers who can't produce data risk being replaced by competitors who can
🏢
Fortune 500 / Large EU Company
$1B+ revenue · legally mandated to report Scope 3
Mandated
🔄
Procurement Team
Sends emissions questionnaires to all vendors annually
Active now
🏪
Your SMB
Must provide Scope 1, 2 & 3 data to keep the contract
You
❌
Without CarbonCalc
No data → contract risk → supplier list consolidation
At risk

What we measure

Every emission,
accounted for.

1
Scope 1 — Direct
What you burn
Emissions from sources your company directly owns or controls. The most straightforward to measure.
Company vehicle fuel On-site natural gas & heating oil Refrigerant leakage (HFCs) On-site generators
2
Scope 2 — Indirect
What you buy
Emissions from purchased electricity, heat, steam, or cooling. Varies by your grid's energy mix.
Electricity consumption District heating & cooling Purchased steam Offset by RECs & on-site solar
3
Scope 3 — Value Chain
Everything else
Indirect emissions across your supply chain and stakeholder activities. Often 70–90% of a company's total footprint.
Employee commuting & travel Purchased goods & services Freight & logistics Waste disposal & water

How it works

From zero to
compliant report
in 15 minutes.

1
Enter your business info
Name, industry, headcount, and reporting year. Takes 60 seconds.
2
Walk through each scope
Simple forms with plain-English labels. Leave blank what doesn't apply.
3
Instant calculation
EPA emission factors and GHG Protocol methodology. No spreadsheet required.
4
Download your report
GHG inventory PDF ready to share with customers, lenders, or regulators.

The regulations

Know what's
coming at you.

Two major regulatory waves are creating unprecedented demand for SMB emissions data. Here's what you need to know.

🇺🇸
CA SB 253 & SB 261
California Climate Corporate Data Accountability Act + Climate-Related Financial Risk Act
$1B+
Revenue threshold for SB 253
$500K
Max penalty per year, per SB 253
2026
First SB 253 reporting deadline
SB 253 requires annual Scope 1 & 2 disclosure starting Aug 10, 2026; Scope 3 in 2027
SB 261 requires biennial climate-risk reports — enforcement paused pending Ninth Circuit appeal
Must comply with GHG Protocol — the same methodology CarbonCalc uses
Applies to public AND private companies doing business in California
✅ SB 253 is active and enforceable today
🇪🇺
EU CSRD
Corporate Sustainability Reporting Directive + European Sustainability Reporting Standards (ESRS)
1,000+
Employee threshold post-Omnibus
€450M
Revenue threshold (Omnibus revised)
2028
Wave 2 reporting deadline
Omnibus I (Dec 2025) narrowed scope to 1,000+ employee companies — but Scope 3 supply chain data requirements remain
Wave 1 companies (500+ employees) are actively reporting for FY2024 right now
SMEs exempt from mandatory reporting but face indirect supply chain pressure
Voluntary VSME standard available for SMEs wanting to report proactively
⚠️ Wave 1 active · Wave 2 deadline 2028 · SME supply chain pressure ongoing

Pricing

Start free.
Scale when ready.

The calculator is always free. Unlock reporting, tracking, and AI-powered tools as your compliance needs grow.

Free
$0
forever
  • Full Scope 1, 2 & 3 calculator
  • GHG Protocol methodology
  • On-screen report & recommendations
  • Save & download PDF
  • Year-over-year tracking
  • AI narrative generator
Start Calculating
Most Popular
Starter
$99
per year
  • Everything in Free
  • Save & download PDF reports
  • Year-over-year tracking
  • 3 reports per year
  • AI narrative generator
  • Industry benchmarking
Get Started
Growth
$299
per year
  • Everything in Starter
  • AI sustainability narrative
  • Industry benchmarking
  • Unlimited reports
  • 3 team members
  • White-label & API
Get Started
Agency / CPA
$1,499
per year
  • Everything in Growth
  • Manage 20+ client accounts
  • White-label branding
  • API access
  • Priority support
  • Custom onboarding
Contact Sales

Why it matters

The pressure is
already here.

"We got a supplier questionnaire from our biggest retail customer asking for our GHG inventory. We had nothing. That's when we realized this was real."
🏭
Regional Manufacturer
50 employees · sells to national retailer
"Our European distributor told us we need Scope 1, 2, and 3 data for their CSRD filing by Q2. We had three weeks. CarbonCalc got us there."
☕
Specialty Food Producer
22 employees · exports to EU
"I'm a CPA with 40 SMB clients. Half of them are going to need this in the next two years. Having a tool to offer them is a genuine competitive advantage."
📊
CPA Firm Partner
Chicago-based · 40+ SMB clients

Get started today

Don't wait for the
procurement email.

15 minutes. No consultant. No spreadsheet. Just a clean, credible GHG report your customers can trust.

Calculate My Footprint — Free → See pricing
Free forever · No credit card · GHG Protocol aligned · EPA emission factors