For many years, financial services advanced with a focus on efficiency, security and profitability. But the climate crisis, the scarcity of resources and societies' need for more inclusive solutions have confronted the sector with a new imperative: sustainability. Financial institutions no longer create only economic value; they are also held responsible for their environmental and social impact. And the most powerful lever in this transformation is technology.

Today, many technologies—from artificial intelligence (AI) to the Internet of Things (IoT), from blockchain to green financing products—are shaping the sustainability journey of financial services.

 

In financial services, AI is now used not only to prevent fraud or personalize the customer experience but also to make sustainable decisions.

· ESG Scoring: By processing large data sets, AI evaluates companies' environmental, social and governance (ESG) performance. Companies such as MSCI ESG Ratings, Sustainalytics and RepRisk gather data on more than 10,000 organizations worldwide from over 100,000 sources daily and analyze it for corporate decision-makers and investors.

· Carbon Footprint Calculation: By analyzing customer spending, banks can offer carbon footprint reports to individuals and companies. In this area, Mastercard, while calculating carbon emissions linked to consumer spending, also offers emission values and concrete lifestyle suggestions such as how many trees should be planted. Prominent platforms operating in this field, such as Doconomy, Yayzy and Greenly, link spending with the product life cycle.

· Sustainable Investment Advice: AI algorithms can guide investors by highlighting low-carbon funds and green bond portfolios. In this area, some investment funds and ETFs allow investors to create both financial and ethical value with portfolios shaped according to ESG criteria.

 

IoT digitizes the physical world through sensors. This creates new opportunities for sustainability in financial services.

· Energy Use Tracking: IoT-based smart meters measure companies' energy consumption in real time, providing data for sustainable financing models. At its simplest, there are various solutions that monitor more than 50 devices via IoT to show which unit consumes how much energy. Barclays, in a pilot in the UK, reduced operational carbon emissions by optimizing lighting and climate control with smart sensors in branches.

· Green Loans: With data coming from IoT devices, banks can offer special credit terms to companies that achieve energy savings. Prominent financial institutions such as ING, BBVA and IFC shape credit terms in renewable energy projects according to production/consumption data obtained via IoT.

· IoT in Insurance: Smart sensors reduce risks, lowering both environmental harm and insurance costs. One example application is Shepherd, which monitors energy consumption, temperature, security and risks with IoT technology. This way it detects risks in advance and reduces customers' operating costs and carbon footprint by around 20-25%.

 

Blockchain is one of the most powerful technologies meeting the need for transparency in financial systems.

· Carbon Credit Tracking: By making every step traceable—from the generation to the use of carbon credits—blockchain solves the trust problem in the market. Through various protocols, it tokenizes carbon credits and brings them into the DeFi ecosystem. Users can buy and sell carbon credits via blockchain, ensuring that credits are transparent, traceable and easily accessible. In this area, IBM is working with Verra on blockchain-based solutions that provide transparent tracking of carbon credits from generation to use. The goal is to prevent the double-counting problem and build market trust.

· Tracking Green Bonds: Thanks to blockchain, investors can see whether their funds actually go to sustainable projects. Financial institutions such as HSBC and IFC allow investors to see in real time that the first green bond funds issued via blockchain are channeled to environmental projects. Similarly, the European Investment Bank issued a digital green bond on the Ethereum blockchain. The fund flow and area of use of this bond can be tracked entirely on-chain.

· Decentralized Finance (DeFi): It makes it possible to support energy-efficiency-focused projects with more democratic financing methods. SushiSwap enables users to tokenize carbon credits and stake them through DeFi protocols.

 

Sustainable financial technologies don't just transform the infrastructure; they also give rise to new-generation financing instruments.

· Green Bonds: Bonds used to finance environmentally friendly projects (such as renewable energy, waste management and sustainable transport) have grown rapidly on a global scale in recent years. In particular, the World Bank became the first institution to issue green bonds in 2008. It has issued more than 200 green bonds and provided financing for renewable energy, waste management and clean transport projects. In Türkiye, the Türkiye Development and Investment Bank issued a Sustainable Bond in 2021.

· Social Bonds: They create capital for projects in women's entrepreneurship, education, health and financial inclusion. UNICEF runs social-purpose projects such as women's entrepreneurship with the World Bank. 

· Sustainability-Linked Loans: Loans whose interest rates change depending on whether companies reach their sustainability goals are spreading rapidly in the finance world. Again, in its work with Danone, ING offers a €2 billion sustainability-linked loan whose interest rate drops if the targets of reducing carbon emissions and water consumption are met.

· Carbon Credit Financing: By selling the credits they earn from projects that reduce carbon emissions, companies both generate income and contribute to global climate goals. Energy giants Shell and BP buy these credits in their carbon-offset portfolios to meet their net-zero commitments. In Türkiye, Enerjisa provided financing in 2023 by selling carbon credits earned from wind and hydroelectric projects on the voluntary carbon market.

These products both meet investors' demand for ESG-focused portfolios and encourage companies toward more responsible business models.

 

Behind sustainable financial technologies lies the need for a strong infrastructure.

· Paperless Transactions: Cloud-based solutions eliminate paper consumption and reduce operational carbon emissions. Paperless processes have been in place in Türkiye for many years, with a similar trend globally. Bank of America, too, has moved toward paperless processes. 

· Green Data Centers: Financial institutions shrink their carbon footprint with highly energy-efficient data centers.

· Cost Advantage: Less energy means lower cost; this makes sustainability economically attractive as well.

 

By the time we reach 2030, it is likely that we will see a “carbon footprint label” next to every financial product. Just as product contents are shared transparently in the food sector, in financial services too customers will see how sustainable each product is.

 

On this journey, AI, IoT, blockchain, green financing products and cloud technologies will not be mere supporters; they will be the actors that change the rules of the game.