Central bank digital currency (CBDC): how it works and why it matters

Learn how a central bank digital currency (CBDC) works, who uses it, and how it compares with bank money, cryptocurrencies, and stablecoins.

Introduction

A central bank digital currency (CBDC) is a digital form of a country's official money issued by its central bank. CBDCs extend existing central bank money such as cash and reserves into a fully digital format for retail users or financial institutions. CBDCs keep a stable value through a one‑to‑one link with national fiat currency and hold full government backing.

CBDCs differ from commercial bank money because CBDC balances are direct liabilities of the central bank, not private banks. Retail CBDCs target everyday payments by the general public, while wholesale CBDCs target large‑value transactions between financial institutions. CBDC designs include account‑based models with identity‑linked balances and token‑based models that transfer digital tokens using cryptographic keys.

Global CBDC work expanded quickly after 2020, with more than 100 jurisdictions exploring projects or pilots. Live examples include the Bahamas Sand Dollar, Nigeria's e‑Naira, Eastern Caribbean DCash, Cambodia's Bakong, and Jamaica's Jam‑Dex. Large economies such as China, India, the European Union, Brazil, and Singapore run pilots that test retail and wholesale CBDC designs at national scale.

How does a central bank differ from commercial banks?

A central bank is a national institution that issues currency, manages monetary policy, and supports financial stability. Central banks control the money supply, set key interest rates, manage foreign exchange reserves, and act as lenders of last resort for commercial banks during crises. Examples include the Federal Reserve in the United States, the European Central Bank in the euro area, and the People's Bank of China.

Commercial banks are private or publicly listed institutions that accept deposits, extend loans, and offer payment services to individuals and businesses. Commercial banks create money through lending and record it as deposits, using fractional reserve practices. Central bank money includes physical banknotes and coins plus reserves that commercial banks hold at the central bank. Commercial bank money includes demand deposits and savings accounts, which are claims on commercial banks rather than direct claims on the central bank.

In most countries, only the central bank (and, in some cases, other designated public authorities such as the treasury for coins) has legal authority to issue legal‑tender national currency. CBDCs represent central bank liabilities in purely digital form, similar in legal status to physical cash. Bank deposits remain commercial bank liabilities, so depositors face institutional failure risk, partly mitigated by deposit insurance. This liability difference explains why central banks, and not commercial banks, issue CBDCs.

What is fiat currency?

Fiat currency is government‑issued money that does not rely on physical commodities such as gold or silver for backing. Governments declare fiat currencies legal tender for settling debts and taxes, and value arises from that legal status and public trust. Examples of fiat currencies include the United States dollar (USD), euro (EUR), Japanese yen (JPY), and Chinese yuan (CNY).

Many central banks group money into categories such as M0, M1, M2, and sometimes M3 or M4, with broader aggregates generally adding more types of deposits and money‑market instruments as liquidity decreases. For example, M0 often covers physical currency in circulation and central bank reserves, while successive aggregates add demand deposits, savings deposits and selected money‑market instruments. CBDCs function as digital fiat currencies, with the same government backing and one‑to‑one exchange with physical notes and coins.

How is CBDC different from cryptocurrency?

CBDCs and cryptocurrencies both use digital infrastructure, but they rely on different governance and value principles. Central banks issue and regulate CBDCs as legal tender, and they control supply through monetary policy frameworks. Cryptocurrencies such as Bitcoin operate through decentralized networks without a central authority, using consensus mechanisms like proof‑of‑work or proof‑of‑stake. CBDCs maintain a stable value through a one‑to‑one peg with fiat currency, while cryptocurrencies show significant price volatility influenced by market demand and speculation.

Stablecoins form a separate category between CBDCs and cryptocurrencies. Private entities or decentralized protocols issue stablecoins and try to maintain stable value through fiat reserves, other assets, or algorithms. Examples include Tether (USDt) and USD Coin (USDC). Stablecoins lack government guarantees and can lose their peg if reserves or algorithms fail, as occurred during the TerraUSD collapse in 2022. CBDCs seek to combine the digital transfer efficiency of crypto with cash‑like legal status and state backing.

How is CBDC different from money in your bank account?

Money in commercial bank accounts is a liability of the bank, whereas CBDC is a liability of the central bank. Bank deposits are claims on central bank money and rely on commercial bank balance sheets and risk management. Commercial banks use deposits to fund loans and investments, which creates credit and exposes banks to default and liquidity risk. CBDCs function as central bank money in digital form and resemble electronic cash issued directly by the public authority.

This liability structure leads to different risk profiles for depositors. Commercial bank deposits face institutional failure risk if the bank becomes insolvent, although deposit insurance covers balances up to legal limits. CBDC balances do not carry private credit risk because central banks do not fail in their own currency under normal conditions. Both CBDCs and deposits appear as digital entries, but their backing and legal nature differ.

CBDCs also affect the funding structure of commercial banks. Households and firms can move deposits into CBDC wallets during stress, which accelerates deposit outflows and reduces funding for lending. Central bank and academic research estimate that CBDC adoption could shift between 4 percent and 12 percent of bank deposit funding into CBDC balances under some scenarios.

What are the different types of CBDC?

Central banks group CBDCs into retail CBDCs and wholesale CBDCs, based on target users and transaction types. Retail CBDCs address end‑users such as individuals and businesses, while wholesale CBDCs address financial institutions and market infrastructures. Both categories use similar technologies but have different policy goals and risk profiles.

Retail CBDC

Retail CBDCs provide digital currency to households, merchants, and small enterprises for everyday payments and peer‑to‑peer transfers. Policymakers treat financial inclusion as a key goal and reach unbanked populations that lack access to traditional accounts. Retail CBDCs use account‑based systems, with identity‑linked balances, or token‑based systems, which use cryptographic keys and digital tokens. China's e‑CNY, Jamaica's Jam‑Dex, and Nigeria's e‑Naira are retail CBDCs in advanced pilots or live operation. Large‑scale retail CBDC adoption can shift deposits away from commercial banks and change their funding mix.

Wholesale CBDC

Wholesale CBDCs target banks, central counterparties, and financial market infrastructures for large‑value payments and settlement. These CBDCs integrate with interbank payment systems, securities settlement, and cross‑border clearing arrangements. Singapore's Project Orchid, Switzerland's Project Helvetia, and Australia's Project Acacia illustrate wholesale CBDC pilots that test high‑value transaction settlement on new platforms. Wholesale CBDCs reduce counterparty risk and settlement delays while leaving retail banking structures mostly unchanged. Many projects use a two‑tier model, where central banks issue wholesale CBDC and intermediaries distribute services to participating institutions.

How does CBDC work?

CBDC systems run on secure digital infrastructure that may use centralized databases or distributed ledger technology (DLT), including blockchain frameworks. Many projects follow a two‑tier distribution model in which the central bank issues CBDC to intermediaries such as commercial banks or licensed payment providers, which then manage user wallets and services. This structure supports existing banking roles while introducing new forms of digital central bank money. Technical architectures generally fall into account‑based CBDCs and token‑based CBDCs.

Account‑based CBDC

Account‑based CBDCs operate like digital accounts at the central bank or designated intermediaries. Users hold balances linked to verified identities, which rely on government‑issued identification documents. Payment systems process transactions by debiting the payer's account and crediting the payee's account on a centralized ledger. Intermediaries apply Know Your Customer and Anti‑Money Laundering rules to account opening and ongoing monitoring. Account‑based models support account recovery when users lose credentials, but they provide less privacy than cash or some token‑based formats.

Token‑based CBDC

Token‑based CBDCs represent digital tokens with defined face values that function like digital banknotes. Users hold tokens in digital wallets and transfer them by signing transactions with private keys, which public keys verify. Systems record token transfers either on a distributed ledger or in a centralized database while preventing double‑spending. Some designs support offline transactions through secure hardware chips, which store cryptographic material and update balances once devices reconnect. Token‑based CBDCs can offer higher anonymity than account‑based models but expose users to permanent loss of funds if private keys or devices are lost.

What are the benefits of CBDC?

CBDCs provide several potential benefits for households, firms, and public authorities when designs match policy goals and infrastructure capacity. Policymakers focus on financial inclusion, payment efficiency, security, monetary policy operations, and cross‑border payment improvements.

Financial inclusion improves when people without bank accounts use CBDC wallets managed by authorized providers. According to the World Bank’s Global Findex 2021, around 1.4 billion adults worldwide lacked access to regulated financial services. India has hundreds of millions of women who face barriers to formal financial services, and policymakers view CBDC as one tool to improve digital access for them. Mobile phone‑based CBDC wallets help rural and low‑income users store value and make payments without traditional branches.

Payment efficiency increases when systems settle transactions instantly or within seconds at any time. Some multi‑CBDC experiments achieve cross‑border settlement times below 30 seconds, compared with days for legacy correspondent banking. CBDCs also reduce costs associated with printing, transporting, and securing physical cash.

Security benefits arise from strong encryption and tamper‑resistant transaction records, which reduce counterfeiting and unauthorized changes. Traceable payment records improve efforts against money laundering, fraud, and tax evasion when combined with appropriate legal safeguards.

Monetary policy transmission can become more direct when central banks adjust interest rates on CBDC holdings or design targeted transfers. China's e‑CNY became interest‑bearing on January 1, 2026, when banks began paying demand deposit rates on digital yuan balances. Real‑time CBDC data can support faster assessment of spending and liquidity conditions.

Cross‑border efficiency improves when central banks connect CBDC systems through multi‑CBDC platforms. Projects such as Dunbar and Helvetia test direct CBDC transfers among central banks without intermediate correspondent banks. BRICS countries discuss linking CBDCs for trade settlement to lower costs and reduce dependence on existing payment rails.

What are the risks and challenges of CBDC?

CBDC projects face significant risks in privacy, financial stability, adoption, and cybersecurity. Public surveys and central bank studies highlight privacy and bank disintermediation as dominant concerns.

Privacy and surveillance risks arise because CBDC payment records can reveal detailed spending patterns. A CFA Institute survey in 2023 recorded that 63 percent of finance professionals worried about CBDC data privacy. Identity‑linked account‑based CBDCs conflict with the anonymity that cash transactions provide. European discussions underline possible tensions between CBDC data collection and the General Data Protection Regulation. Centralized data stores also present opportunities for misuse by public authorities or breaches by malicious actors.

Bank disintermediation risk arises when depositors shift funds from commercial bank accounts into CBDC wallets. Research suggests CBDC adoption could reduce bank deposit funding between 4 percent and 12 percent under some conditions. Reduced deposits force banks to obtain more expensive wholesale funding and can decrease credit supply to households and firms. The European Central Bank studied CBDC holding limits around 1,500 to 2,500 euros per person as one containment tool. Bank run dynamics may intensify when users convert deposits to CBDC rapidly during crises. Digital transfers remove frictions present with physical cash withdrawals, such as travel time and branch queueing. Analysts describe this as "fast disintermediation" that can destabilize weaker banks and stress deposit insurance frameworks.

Adoption challenges appear in early CBDC launches. One private analysis estimates that average balances are in the low‑double‑digit US‑dollar range for Nigeria’s e‑Naira and below one dollar for Jamaica’s Jam‑Dex, with a global average of only a few dollars per person across launched CBDCs, indicating low real‑world usage. Users continue to favor established mobile payment platforms such as Alipay, WeChat Pay, and similar services, which offer wider merchant networks and embedded services.

Cybersecurity and technical risks remain significant because CBDC systems need continuous availability. Centralized infrastructures create single points of failure vulnerable to large‑scale attacks. DLT‑based designs at national retail scale remain unproven, and operational errors or outages in CBDC systems could disrupt entire payment ecosystems.

Which countries have launched CBDCs?

By early 2026, a small number of jurisdictions had launched CBDC‑like systems, and only a few (including the Bahamas, Jamaica, and Nigeria) operated fully launched nationwide retail CBDCs. The Bahamas issued the Sand Dollar as the first nationwide retail CBDC in October 2020. Nigeria introduced the e‑Naira in October 2021, becoming Africa's first CBDC issuer. Jamaica launched Jam‑Dex in July 2022 with full legal tender status. Cambodia released Bakong in October 2020, using blockchain infrastructure for payments in Cambodian riel and United States dollars. The Eastern Caribbean Central Bank launched DCash in March 2021 across multiple island nations.

Adoption levels in these systems remain modest relative to expectations and compared with private payment apps. Sand Dollar circulation equals less than 1 percent of total currency in the Bahamas. Nigeria's e‑Naira reaches a small share of the population despite significant promotional efforts, while surveys suggest that a large share of Nigerians—often estimated at well over 30 percent of adults—have used cryptocurrencies. Jam‑Dex maintains small average balances despite wallet incentives. Analysts attribute low use to limited merchant acceptance, technical frictions, and strong network effects from existing mobile money and card systems.

_{Data current as of early 2026.}

Which countries are testing CBDC pilots?

Many large economies now test CBDCs through pilots rather than full launches. As of January 2026, at least 139 governments representing about 95 percent of global GDP study or develop some form of CBDC. Major pilots appear in China, the European Union, India, Brazil, and Singapore. Wholesale CBDC trials generally progress faster than retail projects.

China's e‑CNY (digital yuan) is the largest and most advanced CBDC pilot. The program covers at least 29 cities and has opened hundreds of millions of wallets. By mid‑2024, cumulative e‑CNY transactions reached around seven trillion yuan, or about 986 billion dollars at that time. From January 2026, Chinese banks began paying interest on certain e‑CNY balances at demand deposit rates, turning the digital currency into an interest‑bearing instrument. Despite scale, third‑party payment platforms such as Alipay and WeChat Pay still process most consumer digital payments.

The European Central Bank continues digital euro preparation with design and rulebook work. ECB documents outline a possible launch window around 2029, subject to legislative approval. Pilot exercises and limited live use could occur earlier, with strong emphasis on privacy, offline capability, and integration with existing euro payment rails.

India's e‑Rupee covers both retail and wholesale pilots. Retail user numbers reached about seven million by early 2026. In January 2026, the Reserve Bank of India advanced a proposal to link BRICS CBDCs for cross‑border trade and tourism payments. This interoperability framework would connect CBDCs from Brazil, Russia, India, China, and South Africa and reduce reliance on traditional correspondent banking networks. Brazil's Drex project prepares a two‑phase launch that combines CBDC with tokenised bank deposits and securities. Phase one focuses on infrastructure and issuance, while phase two tests programmable features and privacy solutions. Singapore's Project Orchid advances wholesale CBDC for interbank use, and earlier experiments with the United States Federal Reserve showed cross‑border settlement in under 30 seconds.

How can you use CBDC? A practical guide

Retail CBDC systems in the Bahamas, Jamaica, and Nigeria follow broadly similar processes for wallet creation, funding, and payments. Users access CBDC through digital wallets, and designs aim to reach people without traditional accounts. Authorities generally avoid minimum balance requirements and ongoing fees for basic CBDC wallets.

Step 1, getting a CBDC wallet, involves contacting an authorized provider such as a commercial bank, payment service provider, or licensed fintech company. Providers request identity information including name, address, national or taxpayer identification numbers, and a government photo document. Staff then apply Know Your Customer and Anti‑Money Laundering checks under central bank rules. Some systems also support wallets for minors when parents or guardians approve them.

Step 2, adding funds, uses different channels. Users transfer money from bank accounts into CBDC wallets at a one‑to‑one conversion rate with existing currency. They can also deposit physical cash at provider branches or at smart ATMs that convert cash to CBDC balances. Peer‑to‑peer transfers from other CBDC wallets offer a third funding route, and all these methods settle immediately.

Step 3, making payments, relies on digital identifiers. Payers scan recipient QR codes or enter wallet addresses, enter the payment amount, and confirm transactions on their devices. Recipients present their QR code or code identifier to receive funds. Systems settle transactions in real time and operate continuously without traditional banking cut‑off times. Some token‑based CBDCs also process offline payments through secure hardware chips that synchronize once connections resume.

Step 4, converting back to cash, occurs at provider branches or smart ATMs. Users request cash withdrawal, and the system deducts CBDC from the wallet while dispensing the same amount in banknotes at the fixed exchange rate.

Frequently asked questions (FAQ)

References / Sources

• Atlantic Council – Central Bank Digital Currency Tracker. https://www.atlanticcouncil.org/cbdctracker/
• International Monetary Fund – CBDC Virtual Handbook. https://www.imf.org/en/topics/digital-payments-and-finance/central-bank-digital-currency/virtual-handbook
• Bank for International Settlements – Central Bank Digital Currencies publications. https://www.bis.org
• World Economic Forum – Wholesale and retail CBDCs: difference and implications. https://www.weforum.org
• CoinPaprika – Cryptocurrency market data and Bitcoin metrics. https://coinpaprika.com
• Academic and policy literature on CBDCs (MDPI, Taylor & Francis, and related publishers) as cited in the article.