ESG reporting
is becoming mandatory –
your CO₂ data
is already available.
ESG reporting
is becoming mandatory –
your CO₂ data
is already available.
CSRD and supply chain requests turn your emissions into a key performance indicator for which you are accountable. LEAF generates these automatically from the invoices you process in billbox anyway – in real time, with granular detail down to the supplier and item, and in an audit-proof format.
You already know your financial data. Now the CO₂ data comes with it.
billbox has always run your financial accounting. LEAF extends that very system with your non-financial metrics – the basis for sustainability and ESG reports. Both from a single source, with the same reliability.
billbox
Financial accounting: capture, review, approve and archive invoices – audit-proof.
billbox LEAF
Non-financial data: CO₂ emissions by supplier, item and Scope 1–3 – automatically from the same invoices.
No second data entry. No estimates from last year.
Set up your company —
the dashboard calculates live.
Estimate based on recognised averages (avg. 4.0 t/vehicle · 90 kg CO₂/m² · 1.5 t/employee · 0.30 kg CO₂e/€). With LEAF this becomes the exact, line-by-line, audit-proof balance.
Emissions by scope
Scope 1 · 2 · 3
Emissions over time
monthly, in tonnes CO₂
Top suppliers by CO₂
orange = biggest emitter · starting point for action
Top items
each item with scope and trend
| Item | Scope | t CO₂ | Trend |
|---|
Emission offset & costs
voluntary offset payments · avg. price assumed, freely adjustable
Every number in the cockpit can be traced back to its individual source. Let’s take a look inside your company.
Every emission source – down to the individual line item.
Fleet, electricity, travel, IT, office: everything runs through billbox as a receipt and automatically lands in the right place. Hover over your company – each source carries its own CO₂ value.
Everything that turns raw data into an audit-proof report.
Scopes 1–3
Every emission assigned to its source: direct emissions, purchased energy and the entire supply chain.
Item & supplier list
Every product captured via invoices, with CO₂ value and scope – filterable by period and business unit.
AI categorisation
Automatic classification based on a verified database of recognised values, including the UN Industry Classification.
Full control
Adjust categories and CO₂ values manually, document verifications – including a complete change history.
Quality checks
Automatic validation of all values and categories for consistency and validity.
Excel export
Export every analysis with a single click – for your own analyses or external ESG reporting systems.
An obligation becomes an advantage.
- Real-time transparency instead of an annual snapshot
- Audit-proof data basis for CSRD & future reporting obligations
- Emission intensity relative to revenue – efficiency at a glance
- Scalable, without an additional data team
- Full traceability – every change documented
Figures your auditor accepts.
The CO₂ values in LEAF are created in partnership with cobank – an audit-proof carbon-ledger methodology. Every invoice line is calculated against a versioned factor library, and every closed period is sealed tamper-proof.
Recognised factors
Around 1,400 emission factors from BAFU, DEFRA, ecoinvent, IEA and EPA. Every line records which factor version it used – earlier periods stay reproducible.
Checked line by line
Every item receives a factor assignment, a confidence score and a traceable justification. Anything below the threshold goes into the review queue – instead of slipping through silently.
Sealed tamper-proof
SHA-256 hash chain across all lines: any subsequent change breaks the following hashes. The period close is verifiable down to the byte.
Ready for your audit
Exports for VSME, GHG Protocol and CSRD, plus a dedicated auditor interface compliant with ISSA 5000 / ISAE 3410 – your audit firm works directly in the system.
How your CO₂ figure is built – line by line, not estimated.
In this demo you see average values. In live operation LEAF – powered by the audit-proof engine of our partner cobank – calculates every invoice line individually. Three methods, always attempted in this order and documented per line:
Physical activity
Wherever the invoice states a quantity: quantity × factor – e.g. kWh of electricity × grid factor, litres of diesel × fuel factor. Reproducible down to the unit. Preferred method.
Distance × weight (freight)
For transport with distance and weight: tonne-kilometres × mode factor, per ISO 14083. Freight surcharges (BAF, tolls, taxes) are not double-counted.
Spend-based (EEIO)
Only when 1 & 2 are missing: € × EEIO factor by industry. Every such line is clearly flagged as “spend-based” with a lower confidence score – the auditor sees at once which figure rests on a thinner data basis.
Factor library
Versioned, published factors – pinned to the invoice date and permanently bound to the line.
Confidence score per line
Every line carries a value from 0 to 1 – derived from factor quality, classification certainty and missing fields.
Immutable audit trail
Every entry runs through a SHA-256 hash chain. Closed periods are sealed – every figure is traceable to invoice, factor and sign-off. “Audit-grade” is not a slogan here, but the shape of the database.
Reporting compliant with GHG Protocol and ISO 14083. An independent audit (ISSA 5000) is available through partner audit firms – cobank provides the working paper, the audit opinion stays with the firm. Read the full methodology at cobank →
Documented, traceable, linked.
The values in this demo are based on recognised standards and public data sources. For context: since the Omnibus I Directive (EU 2026/470, in force since March 2026), the CSRD is mandatory only for large companies (more than 1,000 employees and over €450 million in revenue). Smaller companies report voluntarily under the VSME standard – driven above all by requests from banks, investors and large customers along the supply chain.
EU regulation & ESG
- CSRD – European CommissionOfficial overview of the reporting requirement
- Omnibus I Directive (EU) 2026/470Council of the EU: new thresholds, Feb 2026
- VSME – voluntary standard for SMEsEFRAG: framework for companies outside CSRD scope
- EU recommendation on VSME (July 2025)European Commission
Methodology & accounting
- GHG ProtocolInternational standard for CO₂ accounting
- GHG Protocol – Scope 3 StandardAccounting for supply-chain emissions
- Spend-based method explainedClimatiq · EXIOBASE factors per €
Emission factors (demo)
- Car ≈ 4.6 t CO₂/yearUS EPA, typical vehicle
- Office ≈ 90 kg CO₂/m²/yearUK gov benchmark / DEFRA factors
- ≈ 0.30 kg CO₂e/€ procurementSpend-based; EU average ~0.7 kg/€
- ecoinventFactor database (as used by cobank, BAFU/DEFRA/IEA)
The figures in this demo are illustrative average values for demonstration purposes. With billbox LEAF, the exact, line-by-line, audit-proof balance is created from your real receipts.
