CDP Reporting for Small Businesses: Complete Guide
Introduction
For years, the CDP (formerly the Carbon Disclosure Project) was seen as a playground for the world’s largest multinationals. If you were a mid-market manufacturing firm or a fast-growing tech startup, "disclosing to CDP" likely wasn't on your radar. That has changed. Today, CDP runs one of the largest environmental disclosure systems in the world: over 22,000 companies disclosed through it in 2025, representing nearly two-thirds of global market capitalization, and nearly 11,000 companies used its dedicated SME questionnaire (CDP).
CDP disclosure is voluntary, but it becomes a practical requirement once an enterprise customer sends you a "disclosure request": in 2025, companies in CDP's supply chain program asked more than 45,000 suppliers to disclose (CDP). If you've received an invitation to disclose, it's because you are a vital part of a larger company’s Scope 3 emissions strategy. If you are requested and do not respond, CDP marks you as "Did not disclose." This guide explains how SMBs can navigate the CDP framework efficiently, use the dedicated SME questionnaire, and leverage the 2026 updates to secure their market position.
Section 1: What is CDP for SMBs?
CDP is a global non-profit that runs an environmental disclosure platform. It allows companies to report on three primary "themes": Climate Change, Water Security, and Forests.
In 2026, the CDP uses an integrated questionnaire approach. Instead of filling out three separate forms, you move through a single, unified interface that covers all three themes based on your industry and the specific requests you’ve received.
The SME Questionnaire: A "Fast Track" for Small Business
CDP recognizes that a 100-person company cannot be held to the same reporting standard as a global bank. For this reason, they offer a specialized SME Questionnaire.
- Eligibility: In 2026, companies with 1,000 employees or fewer and annual revenue of US$250 million or less can choose the SME questionnaire, and may still opt for the full one. Above either threshold, or if you were requested through the RE100 initiative, the full corporate questionnaire applies (CDP SME Questionnaire 2026 overview).
- The Difference: The SME questionnaire has fewer, simplified datapoints and no sector-specific questions. Its climate module asks for your emissions methodology and exclusions, your Scope 1, 2 and 3 emissions inventory, energy-related activities, emission reduction targets and reduction initiatives, alongside modules on governance, business strategy, and climate-related risks and opportunities. Only the climate change content is scored.
Section 2: How to Report: The 2026 Process
Reporting to CDP is an annual cycle. Here is how the 2026 cycle runs:
- April 2026: CDP publishes the updated questionnaire and guidance (the SME questionnaire overview came out on April 20). This is the "study phase." You should review the questions and identify which internal stakeholders (Operations, Finance, HR) have the data.
- Mid-June 2026: The response window opens in the CDP Portal (week of June 15). This is when you begin entering your data.
- September 16, 2026 (Scoring Deadline): This is the most critical date. To receive a score (A through D-), your submission must be finalized by this deadline.
- October 28, 2026: The final deadline for unscored responses and amendments.
- Week of November 30, 2026: Scores are released to you through the CDP Portal, followed later that week by a public release on the CDP website (CDP Help Center).
Practical Application: Mapping Your Data
To fill out the questionnaire, you will need your carbon footprint data ready.
- Emissions Data: You must provide your Scope 1 and Scope 2 figures, and the SME questionnaire also asks for your Scope 3 inventory.
- Methodology: You will be asked which methodology you followed, for example the GHG Protocol, and what you excluded. Carbon Draft states the GHG Protocol standards it follows and cites the source of every emission factor, which helps you answer this part of the CDP portal. The Disclosure-Aligned Report also includes a section that sets out what CDP asks for, what the report contains, and the gap.
- Targets: You’ll need to state whether you have an active emission reduction target. CDP encourages SMEs to set targets aligned with a 1.5°C pathway.
Section 3: Why CDP Matters Now: The "Supplier Effect"
Why should an SMB bother with this complex process? It comes down to winning and keeping business.
- The Procurement "Moat": Some enterprise companies use CDP data and scores when they choose and manage suppliers. Bosch, for example, builds an internal score for each supplier partly from its CDP response and uses those scores in its purchasing process (CDP case study). If two vendors are equal on price, and one has a CDP score of 'B' while the other is marked 'Did not disclose', the disclosure can give the first a clear advantage.
- Investor Attention: In 2026, more than 540 financial institutions with over US$110 trillion in assets asked over 43,000 organizations to disclose through CDP (CDP). If you plan to raise capital, your disclosure is part of what investors see.
- Competitive Benchmarking: A score shows where you stand against peers and gives you a path to improve year over year. This improvement signals to the market that you are a well-managed, resilient company.
Section 4: What’s New in 2026?
The 2026 reporting cycle introduced several changes that matter to smaller companies.
- An A Score for SMEs: In 2026, CDP introduced an A score for climate change in the SME questionnaire, so a smaller company that shows leading action can now reach the top band. CDP notes that the SME A is not equivalent to an A on the full corporate questionnaire (CDP).
- Ocean Questions: For the first time, CDP's 2026 questionnaire includes questions on the ocean (CDP). They are unscored in 2026, so companies in the shipping, food, and hospitality sectors can begin tracking their marine impact without any effect on their score.
- Biodiversity: Beyond carbon, the full corporate questionnaire includes datapoints on biodiversity, which, like plastics and ocean, remain unscored in 2026. They reflect a growing investor interest in "Nature Risk."
CDP reporting can feel like an insurmountable mountain, but for most SMBs, it is a series of manageable steps. By utilizing the SME questionnaire and starting with a clear, spend-based carbon footprint, you can move from "Did not disclose" to a scored response in a single reporting cycle. In 2026, transparency is the ultimate currency, and CDP is the bank where you prove your value.
Preparing your CDP disclosure? Upload your accounting export at aisustainablefuture.com/carbon-draft and get a cited, screening-grade carbon report in minutes. Scope 1 and 2 from $20, Scope 3 from $49.
