Carbon reportingfrom spend datato audit-readyin minutes
Turn the data you already have into evidence-backed carbon reports and Carbon Passports. No spreadsheet headaches. No manual calculations. No months of reporting work.
your-spend-data.csvCARA™ → Categorise → Map → CalculateCarbon
Passport.
- Reporting boundaries
- DEFRA methodology alignment
- ISO 14064-1 framework
- Verification records & audit trail
Trusted across construction, infrastructure, retail & public sector supply chains
Supporting growing suppliers, sustainability consultants, enterprise contractors and procurement-led organisations.
Carbon reporting has become a business requirement
The challenge isn’t another dashboard; it’s turning fragmented financial and operational data into carbon intelligence that your customers can trust.
Carbon-OS solves that in minutes
Select a question to see where the Carbon Passport answers it.
Upload. Calculate. Report.
Upload your data
Start with the files you already use. No specialist formatting required.
- CSV files & Excel spreadsheets
- Accounts exports & purchase ledgers
- Procurement records & expense reports
- Supplier spend data
CARA™ does the
heavy lifting
Our AI-powered carbon intelligence engine processes thousands of transactions in minutes.
- Categorises expenditure
- Maps emissions factors
- Applies DEFRA methodologies
- Calculates emissions & creates an audit trail
- Identifies reporting gaps
Generate your
outputs
Ready to share with procurement teams, customers, auditors, regulators and stakeholders.
- Generates carbon outputs
- Carbon Footprint Reports
- Scope 1, Scope 2 & Scope 3 Reports
- Executive Summaries
- Procurement Reports
- Audit Documentation
- Your Carbon Passport
Your data.
A clearer picture.
From first upload to a shareable carbon identity.
A closer look at Carbon-OS and CARA.
Sample accounts export · Northfield Construction Ltd.
See how spend data becomes a Carbon Passport.
- Categorising expenditure
- Mapping emissions factors
- Applying DEFRA methodologies
- Calculating emissions
- Identifying reporting gaps
Spend-based estimate. Reporting gaps are flagged, not hidden.
Now select “They receive” to see what the buyer sees.
carbonos.example/verify/CP-2026-NFC-004817
See the passportCarbon Passport · Northfield Construction Ltd.
CP-2026-NFC-004817
- Total carbon footprint · Scope 1, 2 & 3
- Calculation basis · UK DEFRA conversion factors
- Audit trail and evidence list
- Independent verification · Not supplied
- SECR energy data (kWh) · Not supplied
Sample demo · Specimen data only · Nothing is uploaded or sent. One Passport. Multiple Tenders. Multiple Customers. Multiple Uses.
One organisation
One trusted
carbon identity
Stop recreating carbon reports for every request. Your Carbon Passport is a shareable carbon profile, with its methodology and evidence attached, generated directly from your spend and operational data.
Share your trusted profile with procurement teams, customers and stakeholders instead of spending weeks responding to the same questions.
Carbon profile & calculation basis
Built by Carbo-Calc
Carbon Passport
Document security design · specimen
Generated by Carbon-OS · Sample data for design purposes01 / 02
Disclosure readiness & document record
Built by Carbo-Calc
Northfield Construction Ltd.
Sample URL placeholder only: carbonos.example/verify/CP-2026-NFC-004817
Generated by Carbon-OS · Sample data for design purposes02 / 02
Independent verification is recorded separately from Carbon-OS reporting. The specimen above shows where verification evidence is held and what is still outstanding.
Carbon Footprint; Scope 1, 2 & 3 Emissions; Reporting Boundaries.
DEFRA Methodology Alignment; ISO 14064-1 Framework; Verification Records.
Audit Trail; Supporting Evidence; Shareable Digital Profile.
Which requirement
are you facing?
Select a tender or reporting requirement to see what a Carbon Passport covers and what you still provide.
Different organisations
One trusted foundation
From your first tender to a complex supply chain, Carbon-OS makes trusted carbon intelligence accessible.
Need carbon reporting
for a tender?
Professional reports without an internal sustainability team or significant consultancy costs.
Upload spend data. Generate your report. Share your Passport. Stay procurement ready.
More time advising.
Less time processing data.
Automate preparation, categorisation, mapping, calculations and outputs. Process more clients, improve margins and deliver faster.
Focus on carbon strategy, ESG delivery, decarbonisation planning, supply chain engagement and client growth.
Solve the Scope 3
data challenge.
Standardise supplier reporting through a shared Carbon Passport framework.
Consistent data, supply chain visibility, reduced administration, procurement intelligence and continuous Scope 3 reporting.
Reporting built
for accountability.
Transparent reporting without expanding your teams. Built around the accountability public organisations need.
DEFRA-aligned calculations, audit ready evidence, traceability, consistent standards and procurement support.
Most carbon platforms
start with dashboards
Carbon-OS starts with data
We automate the hard part: collecting, cleaning, categorising and calculating messy financial data accurately, at scale.
- 01Collect data
- 02Clean spreadsheets
- 03Categorise spend
- 04Map emissions factors
- 05Run calculations
- 06Create reports
- 07Prepare evidence
Days or weeks of manual work.
Upload.
Review.
Share.
Carbon reports in minutes.
UK DEFRA-aligned emissions factors and calculations.
A reporting framework aligned with ISO 14064-1.
An audit trail from source data to reporting output.
The future of
carbon intelligence
Carbon-OS is building infrastructure for trusted carbon data across organisations, supply chains and procurement networks.
Clear answers
Confident
next steps
The essentials behind your footprint, your reporting and your Carbon Passport.
What is carbon reporting?
Measuring and documenting greenhouse gas emissions from an organisation’s activities, energy use and supply chain.
What is a carbon footprint?
The total greenhouse gas emissions associated with an organisation’s operations and activities.
What is Scope 3 reporting?
Reporting on indirect emissions throughout the value chain, including supplier and procurement emissions.
How does Carbon-OS calculate emissions?
Carbon-OS analyses spend data, categorises transactions and applies recognised emissions factors using DEFRA-aligned methodologies.
What is a Carbon Passport?
A shareable carbon profile, with methodology and evidence attached, for procurement, compliance, reporting and stakeholder engagement.
Is Carbon-OS suitable for SMEs?
Yes. Carbon-OS provides professional reporting without specialist expertise or large consultancy budgets.
Every organisation
needs a Carbon
Passport
Turn existing spend data into trusted carbon intelligence in minutes whether you’re winning contracts, advising clients, managing suppliers or meeting compliance obligations.