Climate Finance Needs Digital Evidence:

Why digital data systems are the next frontier for financial institutions and their clients

By Methusela Bahame

August, 12 2026

Climate finance is no longer a distant conversation for Tanzania’s financial sector. It is already shaping how banks manage risk, raise capital, engage clients, structure sustainable finance products and report to regulators and investors. From our perspective at AfriAdapt, this transition creates a practical question: how can financial institutions and their clients move from sustainability ambition to measurable, finance-ready implementation?

The sustainability reports of NMB Bank and CRDB Bank show that this shift is already underway. NMB’s 2024 Sustainability Report presents sustainability as a core business issue, with reporting aligned to national and international disclosure frameworks including TFRS 1, DSE sustainability reporting requirements, Bank of Tanzania climate-related financial risk guidance, IFRS S1 and S2, TCFD, GRI and SASB. ¹ CRDB’s 2023 Sustainability Report similarly references GRI Standards, DSE sustainability reporting guidelines and the Central Bank of Tanzania’s climate-related financial risk management guidance. ²

These developments signal an important transition. Financial institutions are no longer expected only to finance economic activity. They are increasingly expected to understand, measure and disclose how their financing decisions affect climate resilience, emissions, nature, communities and long-term financial stability.

Our Central Message

Climate finance cannot scale on ambition alone. It needs reliable, traceable and decision-ready data. Capital will follow evidence.

The Missing Infrastructure Behind Climate Finance

Green loans, sustainability-linked finance, climate adaptation products, green bonds and ESG advisory services all depend on one critical foundation: credible evidence.

A bank needs to know whether a project is genuinely green, whether it meets eligibility criteria, whether risks have been assessed, whether proceeds are used correctly and whether the promised environmental or social impact is actually being delivered.

NMB directly recognises this challenge in its 2024 report. In its value-chain estimation section, the bank explains that when direct measurement was not feasible, it used estimates based on internal and external data, including industry benchmarks. It also notes that the accuracy of Scope 3 greenhouse-gas calculations depends on the quality and representativeness of the data used. The bank further states that it is investing in data quality improvements, engaging clients for more precise data and participating in industry initiatives to refine emissions-calculation methodologies. ³

This is the core issue we see in the market. Sustainable finance products are advancing, but the project-level and client-level data systems behind them are still developing. Without reliable data, banks may struggle to distinguish real impact from assumptions, estimates or self-reported claims.

From Sustainable Finance to Measurable Finance

At AfriAdapt, we see climate finance as more than capital mobilisation, it is the next frontier is credible digital evidence for financial institutions.

Strategic Shift

The future of sustainable finance is a shift from financing labelled green to financing proven green.

Digital Data Systems as the New Climate Finance Enabler

At AfriAdapt, we view digital data systems as practical infrastructure for climate finance. They can connect the bank, the client, the financed project, technical assessors and reporting teams into one structured workflow.

System function	How it supports climate finance
Project screening	Checks eligibility against green finance criteria, ESMS requirements, exclusion lists and sector-specific indicators.
Baseline data	Records current energy use, water use, emissions profile, climate exposure, waste generation, beneficiaries and operating conditions.
Implementation monitoring	Tracks whether financed assets are installed, operational and maintained after disbursement.
Impact measurement	Tracks whether financed assets are installed, operational and maintained after disbursement.
Reporting and assurance	Supports sustainability reporting, green bond impact reporting, regulatory submissions, portfolio dashboards and investor communication.

Managing Climate Risk Through Better Client Data

Climate finance is not only about opportunity. It is also about risk.

NMB’s double materiality assessment identifies several sustainability-related risks and opportunities. It notes that insufficient ESG screening of eligible activities and inaccurate impact measurement may trigger greenwashing accusations and undermine trust in the sustainable finance agenda. It also recognises that inadequate Environmental and Social Risk Management policies may increase credit risk if climate-related risks to physical assets are not properly considered. ⁶

This is highly relevant for financial institutions. Climate-related risks can affect borrowers through floods, drought, heat stress, unreliable water supply, energy-transition pressures, changing regulations and supply-chain disruptions. When these risks affect the borrower, they can also affect repayment capacity, collateral value and portfolio quality.

NMB has already started moving in this direction. The bank reports that it quantified financed emissions across 61% of its wholesale portfolio worth TZS 1.2 trillion and that these insights now inform risk assessment models and client engagement strategies. ⁷

The lesson is clear: climate data is becoming credit data.

Supporting Clients to Become Finance-Ready

Many clients want to access climate finance but are not yet data-ready. They may have a strong project idea, but weak documentation. They may understand their sustainability challenge, but lack baseline information. They may want green finance, but cannot quantify their expected impact.

This is where we see a strong opportunity for practical support. A digital data system can guide clients to organise project information, define indicators, track performance and generate evidence that financial institutions can review.

For a water and sanitation project, this may include data on water produced, wastewater treated, households served, operating costs, energy use and climate-resilience benefits. For an agribusiness, it may include irrigation efficiency, crop productivity, climate hazards, farmer beneficiaries, soil and water management practices and emissions avoided. For a waste-management enterprise, it may include waste collected, recycled material recovered, compost produced, methane avoided, jobs created and revenue streams.

This is important because climate finance is not only about access to capital. It is about helping clients prepare projects that are technically sound, financially viable and measurable.

The Role of Digital MRV

We see digital monitoring, reporting and verification, or dMRV, as a bridge between financial institutions and clients.

In the climate finance context, dMRV should not be seen narrowly as a tool for carbon markets only. It can also support green lending, adaptation finance, sustainability-linked products, ESG reporting, bond impact reporting and environmental and social risk monitoring.

For a bank, dMRV can answer four practical questions: Is this project eligible for climate finance? Has the project been implemented as financed? Is the project delivering the expected environmental or social result? Can the result be reported credibly to investors, regulators and partners?

CRDB’s Green, Social and Sustainability Bond Framework includes categories such as sustainable agriculture, renewable energy, energy efficiency, green buildings, clean transportation, sustainable forestry and fisheries, and sustainable water and waste management. ⁸ Its framework also includes sustainable water and waste management activities such as clean and drinking water, wastewater treatment, sustainable urban drainage systems and flooding mitigation. ⁹

These sectors require technical performance data, not only financial records. A dMRV system can help convert these activities into measurable indicators that support investment decisions and impact reporting.

Trust, Cybersecurity and Data Governance

Digital climate finance systems must be secure and trusted. Banks and clients will only use such platforms if they protect sensitive information and follow strong governance standards.

Both reports show that data protection and cybersecurity are already central concerns. CRDB highlights digital transformation, investment in data and technology, secure digital services, a Tier III data centre, encryption and expanded customer use of online channels. ¹⁰ NMB’s material topics include cybersecurity and data protection, while its sustainability focus areas include being innovative and technology-driven and safeguarding customer data and privacy. ¹¹

This matters because climate finance data will include client operations, financial exposure, emissions information, production data, location-sensitive assets and project-performance records. A credible system must therefore combine sustainability analytics with strong data governance, access controls, cybersecurity, audit trails and responsible data use.

How We Support the Market

At AfriAdapt, we position our work at the intersection of climate finance, ESG, WASH, waste management, urban resilience and digital innovation. We help financial institutions and their clients translate sustainability commitments into measurable, finance-ready solutions.

Climate finance readiness assessments
ESG and environmental-social risk data collection
Sector-specific project screening tools
Baseline and impact indicator design
Digital MRV workflows
Sustainable water, waste, agriculture and resilience project templates
Client engagement dashboards
Green bond and sustainability finance impact reporting support
Digital systems for portfolio-level climate and ESG monitoring

Our strongest contribution is not simply software. It is the design of a data-to-finance pathway: a practical bridge that helps clients prepare credible projects and helps financial institutions finance, monitor and report them with confidence.

From Reporting to Decision Intelligence

Sustainability reporting is important, but reporting alone is not enough. Reports mostly explain what has already happened. Financial institutions now need systems that help them make better decisions before, during and after financing.

This is where digital climate finance systems can change the market. They can help banks identify which clients are ready for climate finance. They can help clients understand what information they need to become bankable. They can help sustainability teams generate better impact reports. They can help credit teams integrate climate and ESG data into risk assessment. They can help investors trust that green finance proceeds are producing real outcomes.

Key Message

Capital will follow evidence.

Our Call to Action

Tanzania’s financial sector has already taken important steps toward sustainable finance. NMB and CRDB show that the banking sector is paying attention to climate risk, sustainable finance, impact reporting, financed emissions, digital transformation and client engagement.

We believe the next step is to strengthen the digital infrastructure that connects all these pieces.

Financial institutions should invest in digital climate finance data systems that help them screen projects, engage clients, monitor performance, measure impact and report credibly. Clients should also begin organising their sustainability data so they can access green loans, sustainability-linked finance, climate adaptation funding and ESG-linked investment opportunities.

For Tanzania and the wider African market, this is a practical opportunity to move climate finance from ambition to implementation.

Climate finance will not be won only by institutions that mobilise capital. It will be won by those that can prove impact.

Source Notes

NMB Bank Plc, Sustainability Report 2024, About this Report, pp. 8-9. The report states alignment with TFRS 1, DSE Listing Rules on Sustainability Reporting, Bank of Tanzania climate-related financial risks and opportunities guidance, IFRS S1 and S2, TCFD, GRI and SASB.

CRDB Bank Plc, Sustainability Report 2023, About the Report, pp. 2-3. The report references GRI Universal Standards, DSE sustainability reporting guidelines and the Central Bank of Tanzania Guidelines on Climate-Related Financial Risk Management, 2022.

NMB Bank Plc, Sustainability Report 2024, Value Chain Estimations, pp. 8-9. The report explains the use of estimates where direct measurement was not feasible and notes that Scope 3 accuracy depends on data quality and representativeness.

NMB Bank Plc, Sustainability Report 2024, Sustainable Finance, pp. 58-59. The report identifies sustainable finance products and opportunities including green loans, sustainability-linked finance, green bonds, green mortgages, green car loans and ESG advisory.

CRDB Bank Plc, Sustainability Report 2023, Sustainable Finance, pp. 42-45. The report describes CRDB’s Environmental and Social Management System, GCF accreditation, Green, Social and Sustainability Bond Framework and Kijani Bond.

NMB Bank Plc, Sustainability Report 2024, Double Materiality Topics, pp. 52-53. The report identifies greenwashing risk from insufficient ESG screening and inaccurate impact measurement, and credit-risk implications from inadequate ESRM integration.

NMB Bank Plc, Sustainability Report 2024, CFO Message and Climate Highlights, pp. 20-27. The report states that NMB quantified financed emissions across 61% of its wholesale portfolio worth TZS 1.2 trillion and uses insights to inform risk assessment and client engagement.

CRDB Bank Plc, Sustainability Report 2023, Green, Social and Sustainability Bond Framework, pp. 44-47. The framework includes sustainable agriculture, renewable energy, energy efficiency, green buildings, clean transportation, sustainable forestry and fisheries, and sustainable water and waste management.

CRDB Bank Plc, Sustainability Report 2023, Sustainable Water and Waste Management, pp. 48-49. Eligible assets include clean and drinking water, wastewater treatment, sustainable urban drainage systems and flooding mitigation.

CRDB Bank Plc, Sustainability Report 2023, Data Privacy and Cybersecurity, pp. 32-37. The report highlights cybersecurity architecture, data classification, access controls, encryption, certification and cyber-risk governance.

NMB Bank Plc, Sustainability Report 2024, Material Topics and Focus Areas, pp. 50-51. The report identifies cybersecurity and data protection as a material topic and highlights innovation, technology and customer data protection as focus areas.