Decarbonization for Tech Companies: How to Measure Scopes 1, 2, and 3
Carbon has become business information: it goes into contracts, due diligence, and RFPs. This guide shows what decarbonization is, what net zero really requires, how to separate scopes 1, 2, and 3 using the GHG Protocol, how to calculate the footprint of cloud, hardware, travel, and suppliers, what to reduce before thinking about offsetting, and how to build the first inventory without turning it into a consulting project.
For a long time, carbon was an issue for heavy industry. Today, it is an issue for any company that signs a contract with a large corporation, participates in a bid, seeks credit with differentiated rates, or goes through investor due diligence. The question is no longer whether your company emits — it is whether it knows how much it emits, where it emits, and what it is doing about it. Decarbonization is no longer an environmental topic; it has become a management discipline.
For tech companies, there is a comfortable and dangerous aggravating factor: the operation looks clean. There are no smokestacks, no trucks, no visible waste. But the product runs in datacenters that consume energy continuously, the team uses laptops that were manufactured with a considerable footprint before reaching the desk, the team travels, suppliers emit, and the end customer consumes energy using the software. When this inventory is done for the first time, the result almost always surprises: most of the impact lies outside the company's walls.
This guide follows the practical path: what decarbonization and net zero actually mean, how to separate Scopes 1, 2, and 3 without getting lost, how to calculate a digital company's footprint, how cloud, travel, suppliers, and hardware enter the equation, what to reduce before considering offsetting, how to set science-based goals, and a checklist to build the first inventory with what you already have on hand.
💡 The biggest mistake founders make: starting with offsetting. Buying carbon credits before measuring is paying to remain ignorant. Without an inventory, you don't know the size of the problem, you can't prove any reduction, and you still assume the reputational risk of a credit of dubious quality.
What is decarbonization and what does net zero mean?
Decarbonization is the continuous process of systematically reducing greenhouse gas emissions associated with an economic activity — changing energy sources, changing processes, increasing efficiency, and redesigning products. It is an ongoing verb, measured in avoided tons of CO₂ equivalent year over year, and not a seal earned once.
Net zero is the endpoint of this trajectory: a state where the company has reduced emissions to the technically feasible minimum within its own value chain and balances the unavoidable residual with permanent carbon removals from the atmosphere. The Corporate Net-Zero Standard is explicit on this point: deep reduction comes first, usually in the range of 90% of the inventory, and neutralization covers only what's left. A company that announces neutrality having reduced 5% and bought credits for the other 95% is not at net zero — it is offsetting.
There is also a difference that confuses many people: absolute targets versus intensity targets. Reducing emissions per dollar earned is great for internal management, but a company can improve intensity while increasing total emissions as it grows. Climate science works with the accumulated carbon budget in the atmosphere, and the IPCC AR6 makes it clear that what matters for temperature is absolute volume. A serious target has an absolute number, a defined base year, and a set deadline.
Carbon Neutral
Emissions measured in a defined scope and offset by credits. It does not require proven own reduction or complete coverage of the value chain. It is the weakest commitment of the three.
Validated Net Zero
Deep reduction pathway in scopes 1, 2, and 3, with short- and long-term goals validated by third parties and neutralization of only the residual with permanent removals.
Climate Positive
Removing more carbon than is emitted. It only makes sense after deep reduction; announced before that, it acts as a distraction from what actually moves the curve.
Want to turn emissions data into product decisions?
Shinier accelerates tech startups with a method: requirements, architecture, KPIs, and roadmap. In decarbonization, this means defining what data to collect, where it lives, how to turn it into a reliable dashboard, and which engineering and contract decisions actually bring down the emissions curve.
For early-stage founders
Use the platform's requirements, KPIs, and roadmap tools to structure your emissions inventory as a data product — with a source, an owner, and a goal.
For mature companies
Need to consolidate energy consumption, fleet, travel, and suppliers into an auditable emissions dashboard? Talk to the Shinier team about the right system.
What is the difference between Scope 1, 2, and 3 emissions?
The division into scopes exists for a practical reason: to avoid double counting. If every company added up everything that happens in its chain as its own emissions, the global total would be counted multiple times. The Corporate Standard solves this by separating what you burn (Scope 1), what you buy in the form of energy (Scope 2), and what happens because of your activity but outside your direct control (Scope 3).
Before classifying anything, define the boundary. Organizational boundary answers which entities are included — by operational control, financial control, or equity share. Operational boundary answers which sources go into each scope. Choose an approach, write down the decision, and keep it for years: changing criteria midway makes any comparison with the base year impossible.
Scope 1 — direct emissions
Everything that burns or leaks inside the boundary you control: your own fleet, diesel generators, boilers, cooking gas, air-conditioning refrigerants, and fire extinguishers. In a tech company, it's usually the smallest volume, but it's the easiest to measure accurately, because there are fuel receipts, maintenance contracts, and gas recharge logs. An in-house datacenter generator and the annual refrigerant leak of an HVAC system already put most software companies with some relevant Scope 1.
Rule of thumb: if you pay the fuel bill, it's Scope 1. If you pay the electricity bill, it's Scope 2. If you pay an invoice from someone who emitted for you — cloud, airline ticket, laptop, outsourced service — it's Scope 3.
How to calculate the carbon footprint of a tech company?
The calculation, deep down, is always the same multiplication: activity data × emission factor = emissions. Liters of diesel times the fuel factor. Kilowatt-hours consumed times the grid factor. Kilometers flown times the route factor. Dollars spent on a supplier category times a sectoral economic factor. The difficulty is never in the math — it is in getting the activity data and choosing a defensible factor.
That is why a data quality hierarchy exists. Direct measurement is better than supplier data; supplier data is better than industry physical averages; physical averages are better than spend-based estimates. Start with what exists, record the method, and improve the source quality each cycle. ISO 14064 doesn't even demand perfection: it demands that uncertainty be stated and that the path from the number to the source be traceable.
Define boundary and base year
List the included entities, consolidation criteria, and the 12-month period that will serve as a baseline. All future progress will be measured against this year, so choose a period with representative operations and reasonably complete data.
Map sources before seeking numbers
Go through accounting ledgers, contracts, and invoices listing every plausible emission source. An incomplete source map produces an inventory that looks good by omission — the most common first-cycle mistake.
Collect activity data
Energy bills, cloud consumption reports, flight mileage, equipment purchase invoices, team commuting surveys, and waste volume. Always in physical units when possible, and only in financial value when there's no alternative.
Apply coherent emission factors
Use official national grid factors, recognized fuel factors, and data published by the cloud providers themselves. Record the source and version of each factor: an undocumented factor change becomes a phantom reduction next year.
Convert everything to CO₂ equivalent
Methane, nitrous oxide, and refrigerant gases have very different warming potentials than CO₂. GWP conversion puts everything in the same currency and avoids underestimating HVAC leaks, which are small in mass but huge in impact.
Document, review, and prepare for audit
A spreadsheet with calculation memory, source of each data point, person responsible for collection, and an uncertainty note. An inventory that no one can reconstruct six months later supports no goals, contracts, or external assurance.
And the software's own footprint?
The Software Carbon Intensity Specification proposes measuring carbon per functional unit — per request, per active user, per processed job — summing the energy consumed by execution, the grid carbon intensity of the region where the code runs, and the portion of embodied carbon in the hardware used. In practice, this makes decisions that were once purely technical comparable: choosing the deployment region, reducing unnecessary calls, caching smartly, shutting down idle environments, and rightsizing instances by actual usage, not by imagined peak.
How do cloud, travel, suppliers, and hardware enter the inventory?
These four categories explain most of a digital company's Scope 3. The good news is that all of them have data available in some system the company already uses: cloud console, travel management, accounts payable, and asset tracking. The work is about integration and criteria, not new instrumentation.
Cloud and Infrastructure
Major providers publish emissions reports per account and service, but almost always in a market-based view, which already considers the provider's renewable energy contracts. Keep the location-based view too: it shows the real impact of the chosen region. A staging environment on 24/7, an oversized instance, and infinite log retention are carbon and cost at the same time.
Travel and Commuting
Flight legs, ticket class, hotels, ground transport, home-to-work commuting, and remote work. Short flights emit disproportionately because of takeoff, and home office shifts consumption from the office to the employee's home — it needs to be estimated, not ignored.
Hardware and Capital Goods
Much of the carbon of a laptop or phone is emitted during manufacturing, before its first use. That's why extending the replacement cycle from three to five years usually reduces more emissions than any internal energy-saving campaign. Refurbishing, reselling, and buying certified pre-owned items count in your favor.
Suppliers and Services
Start estimating by financial spend to find the relevant categories, then replace them with real data from the few suppliers that concentrate the impact. Including a simple emissions reporting clause in contracts is the cheapest way to improve data quality in the next cycle.
What to reduce before considering carbon offsetting?
The priority order is avoid, reduce, substitute, and only then neutralize. Each step above the last is cheaper, more permanent, and more defensible than buying credits. In a tech company, the five fronts below usually deliver the greatest reduction with the lowest investment.
Eliminate computing waste
Shut down environments off-hours, rightsize instances to actual use, delete orphaned volumes, review data retention, and kill jobs nobody reads. It is the only decarbonization action that reduces the cloud bill in the same month, making it easy to approve internally.
Choose regions and times with cleaner grids
Electricity carbon intensity varies by region and time of day. Asynchronous processing, model training, and batch workloads can be shifted to windows and regions with cleaner grids with zero impact on the user experience.
Extend hardware lifespan
Increase the replacement cycle, prioritize repair, buy refurbished, and ensure software continues to run well on older machines. Since carbon is concentrated in manufacturing, every extra year of use dilutes an emission that has already happened.
Review travel and energy policies
Objective criteria for when a meeting must be in-person, preference for direct flights, contracting renewable energy on the free market when volume justifies it, and basic office efficiency: regulated AC, efficient lighting, and cooling maintenance.
Engage suppliers that concentrate impact
Usually, about a dozen suppliers account for most of Scope 3. Asking for data, comparing alternatives, and considering footprint as a purchasing criterion moves more tons than any isolated internal initiative.
About offsetting: when it enters the picture, demand additionality, permanence, absence of double counting, and independent verification. Cheap credit is usually cheap because it delivers none of these four things — and the reputational liability bounces back to the buyer.
How to set science-based targets?
A science-based target is one whose reduction trajectory is compatible with limiting warming to 1.5 °C, according to the carbon budget described by the IPCC. In practice, this means converting a global ambition into an annual reduction percentage applicable to your company, with a declared base year, minimum scope coverage, and a short-term timeframe of five to ten years, in addition to a long-term commitment.
Three precautions prevent the goal from aging poorly. First, choose a base year with reliable data and define upfront the recalculation rule in case of acquisitions, unit sales, or methodological corrections. Second, include Scope 3 if it is material — omitting most of the inventory invalidates the target. Third, break the annual target into initiatives with an owner, budget, and deadline: without this, it becomes a presentation number and no one can explain, at the end of the year, why the curve didn't go down.
Absolute short-term target
Reduction percentage in tons of CO₂e for Scopes 1 and 2, with a defined deadline and annual public review of progress.
Scope 3 coverage
Specific target for relevant categories, usually cloud, procurement, and travel, with a declared supplier engagement strategy.
Supporting intensity indicator
Emissions per active user, per transaction, or per revenue, useful to manage efficiency without replacing the absolute commitment.
Commitment governance
Appointed owner, quarterly review at the management committee, versioned calculation memory, and external verification when required by contract.
Checklist to create the first emissions inventory
The first inventory doesn't have to be perfect — it has to exist, be traceable, and be repeatable next year. The eight steps below fit into a few weeks of work with data your company already generates.
Appoint an owner and a deadline
An inventory without an owner doesn't happen. One person responsible for consolidation, with ad hoc support from finance, IT, and HR, solves the first cycle without a dedicated structure.
Write the boundary on one page
Which companies, which units, which consolidation criteria, and which 12-month period. A signed page prevents six months of rework due to scope changes mid-process.
List all sources before calculating
Fuel, refrigerants, electricity, cloud, travel, commuting, procurement, hardware, waste, and product use. Mark what is material and what is irrelevant, and justify every exclusion.
Pull data from existing systems
Energy bills, cloud provider sustainability reports, travel agency statements, accounts payable by category, and equipment inventory. Start with what's available in a spreadsheet.
Choose and record emission factors
Source, year, and version of each factor used. This record is what allows you to explain, in the next cycle, whether the variation came from real operation or a methodology change.
Calculate, sum by scope, and rank by materiality
Result in tons of CO₂e separated by scope and category, ordered from largest to smallest. The top three lines usually define the entire reduction strategy for the year.
Define three to five actions with owners and targets
Tied to the largest sources, with estimated reduction, cost, and deadline. An action without an expected reduction number is an intention, and intentions don't show up on next year's inventory.
Publish, review, and repeat
Share the result and the method internally, schedule the annual review, and improve the quality of one data source per cycle. Consistency over the years is worth more than pinpoint accuracy in the first year.
Frequently Asked Questions
- Are decarbonization and net zero the same thing?
- No. Decarbonization is the continuous process of reducing the intensity and absolute volume of a company's emissions. Net zero is an end state where residual emissions, already reduced to the technically feasible minimum, are balanced by permanent carbon removals. Reducing a little and offsetting a lot is not net zero — it is offsetting.
- Does a software company really need an emissions inventory?
- It does, and increasingly for commercial reasons. Large clients report Scope 3 and request data from suppliers; bids, banks, and investors are starting to demand an inventory. Furthermore, cloud cost and cloud carbon grow together: those who measure emissions usually find infrastructure waste that never appeared in the financial report.
- Which scope usually dominates in tech companies?
- Scope 3, almost always. Cloud, travel, commuting, hardware purchases, contracted services, and the end customer's use of the product usually add up to much more than office energy and the company fleet. It is also the hardest scope to estimate, making many companies avoid exactly where the impact lies.
- Does offsetting carbon solve it?
- Offsetting is the last step, not the first. Low-quality credits, without additionality and permanence, create reputational and legal risks. The order advocated by SBTi is clear: avoid, reduce, substitute, and only then neutralize residual emissions with verifiably high-quality removals.
Closing the loop: decarbonizing is, above all, an exercise in visibility. The company that measures discovers infrastructure waste, excessively short replacement cycles, and suppliers that are expensive both in carbon and in cash. The carbon bill and the financial bill point, most of the time, to the same decision — and this is what makes the agenda sustainable in the literal sense of the word.
Referências
- GHG PROTOCOL. Corporate Standard and Scope 3 Standard. It is the reference because it defines the accounting method that practically every corporate emissions inventory in the world uses: organizational and operational boundaries, the separation between Scope 1, 2, and 3, consolidation rules by control or equity share, and the 15 value chain categories. Without this common vocabulary, no carbon number is comparable or auditable. Access GHG Protocol standards
- SCIENCE BASED TARGETS INITIATIVE. Corporate Net-Zero Standard. It is the reference because it turns the vague promise of net zero into a verifiable criterion: it requires deep reduction in the company's own value chain before any neutralization, defines short- and long-term horizons, and establishes minimum Scope 3 coverage when relevant. It is what separates climate goals from marketing campaigns. Learn about the SBTi methodology
- IPCC. Sixth Assessment Report. It is the reference because it consolidates the state of science on the global carbon budget, mitigation pathways, and the comparative cost of reduction options. It is the physical basis that supports why goals must be absolute, dated, and proportional to the sector — and not simply ambitious in speech. Consult the IPCC AR6
- GREEN SOFTWARE FOUNDATION. Software Carbon Intensity Specification. It is the reference because it brings carbon accounting into engineering: it proposes measuring carbon intensity per functional unit of software, considering energy consumed, grid carbon intensity, and hardware embodied carbon. It allows treating architecture, deployment region, and code efficiency as climate decisions. View the SCI specification
- ISO 14064. Greenhouse Gases. It is the reference because it standardizes quantification, reporting, and verification of emissions at the organization and project levels, with requirements for uncertainty, document traceability, and third-party assurance. It gives the inventory the status of auditable information, enforceable in contracts, bids, and due diligence. Consult the ISO 14064 standard
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