Digital Dollar and Central Bank Digital Currency (CBDC) Research

The Federal Reserve has conducted active research into whether the United States should issue a central bank digital currency — a digital form of the dollar backed directly by the Federal Reserve. This page covers the definition and scope of CBDC concepts, the structural mechanics under consideration, the policy drivers behind the research, how CBDCs are classified, the tradeoffs that make the topic contested, and the misconceptions that frequently distort public debate. It also provides a structured reference matrix comparing key CBDC design dimensions.

• Definition and scope
• Core mechanics or structure
• Causal relationships or drivers
• Classification boundaries
• Tradeoffs and tensions
• Common misconceptions
• Checklist or steps (non-advisory)
• Reference table or matrix

Definition and scope

A central bank digital currency (CBDC) is a liability of the central bank itself — denominated in the national unit of account — that exists in digital form. It is distinct from commercial bank deposits, stablecoin products, and cryptocurrency assets in one foundational respect: the obligation sits directly on the balance sheet of the issuing central bank, not on a private intermediary.

The Federal Reserve describes a potential U.S. CBDC as a "digital dollar" that would be issued and backed by the Federal Reserve (Federal Reserve CBDC overview). This framing places a U.S. CBDC squarely within the Federal Reserve's existing monetary policy and payment infrastructure, rather than as a competing instrument to it.

The scope of CBDC research at the Federal Reserve spans at least four dimensions: access architecture (who can hold it), distribution model (how it reaches end users), programmability (whether the currency carries embedded conditions), and privacy design (how transaction data is handled). The Federal Reserve Bank of Boston, in collaboration with MIT under Project Hamilton, published findings in 2022 examining a core transaction processor capable of handling 1.7 million transactions per second — a benchmark relevant to the scale demands of a U.S. retail CBDC (Project Hamilton Phase 1 research paper).

Core mechanics or structure

CBDC architecture is generally analyzed along two structural axes: wholesale vs. retail and direct vs. indirect (intermediated) issuance.

A wholesale CBDC is accessible only to financial institutions for interbank settlement and large-value transfers. A retail CBDC is accessible to the general public, functioning as a digital analog to physical cash.

Under a direct model, the central bank maintains individual accounts for each end user — a design that is operationally intensive and politically significant because it concentrates data and credit relationships at the central bank. Under an indirect or two-tier model, commercial banks and payment service providers distribute CBDC to end users while the central bank maintains only wholesale ledgers. The Federal Reserve's January 2022 discussion paper (Money and Payments: The U.S. Dollar in the Digital Age) described an intermediated model as the most likely design for the U.S. context — one that would preserve the existing role of private-sector financial institutions.

Technically, a CBDC ledger can be implemented on a centralized database, a permissioned distributed ledger, or a token-based cryptographic system. Each choice has different implications for throughput, finality, privacy, and resilience. The Project Hamilton prototype demonstrated that a centralized architecture could achieve transaction finality in under 2 seconds, outperforming some distributed-ledger alternatives at comparable scale.

Causal relationships or drivers

Five distinct pressures have advanced CBDC research globally and within the United States.

1. Declining cash usage. In economies where cash is shrinking as a share of consumer transactions, the question of whether the public retains access to a sovereign, risk-free payment instrument becomes acute.

2. Financial inclusion gaps. The Federal Deposit Insurance Corporation (FDIC) estimated in its 2021 National Survey of Unbanked and Underbanked Households that approximately 4.5% of U.S. households — about 5.9 million households — were unbanked (FDIC 2021 Survey). A retail CBDC is one proposed mechanism to extend access to sovereign-backed digital payments without requiring a bank account.

3. Cross-border payment inefficiency. The G20 has designated cross-border payment improvement as a priority. Wholesale CBDCs designed for interoperability are being explored as a mechanism to reduce the cost and settlement lag of international transfers, which can take 2–5 business days under legacy correspondent banking.

4. Competitive pressure from private stablecoins and foreign CBDCs. As of 2023, more than 100 countries were at some stage of CBDC exploration, pilot, or deployment according to the Atlantic Council CBDC Tracker. China's e-CNY had reached pilot scale across more than a dozen cities. These developments have raised questions about dollar primacy in digital payment infrastructure.

5. Payment system modernization. The Federal Reserve's FedNow instant payment system, launched in July 2023, represents one layer of domestic payment modernization, but it operates through commercial bank intermediaries and does not alter the fundamental structure of dollar settlement.

Classification boundaries

Several instruments are routinely conflated with CBDCs but are structurally distinct.

Stablecoins are liabilities of private issuers pegged to a reference asset (typically the U.S. dollar). They are not central bank liabilities. Their backing assets and reserve adequacy are subject to issuer risk.

Commercial bank digital deposits are already digital in practice — the vast majority of money in circulation is held as commercial bank liabilities on electronic ledgers. These are not CBDCs because the counterparty is a private bank, not the Federal Reserve.

Cryptocurrency assets (Bitcoin, Ether, etc.) are bearer instruments with no issuer liability and no peg to any unit of account. They share some technical features with token-based CBDC designs but are categorically different in monetary structure.

FedNow and existing Fed payment rails facilitate dollar settlement between banks but do not change the form of the dollar itself. A CBDC would represent a new form of money, not merely a faster channel for existing money.

The Federal Reserve's role in cryptocurrency regulation addresses how the Fed has approached oversight of private digital assets, which is a parallel but separate track from CBDC development.

Tradeoffs and tensions

Privacy vs. compliance. A retail CBDC that records transactions at the central bank level would create an unprecedented dataset of individual financial behavior. Fully anonymous cash-equivalent privacy would conflict with Bank Secrecy Act (BSA) anti-money laundering (AML) requirements. No design has resolved this tension; the Federal Reserve's 2022 paper acknowledged it as a central unsettled question.

Disintermediation risk. If households can hold CBDC directly at the Federal Reserve, they may migrate deposits away from commercial banks during stress periods — a "digital bank run" dynamic. This could impair the credit intermediation function of the banking system, concentrating systemic risk at the central bank. An intermediated CBDC with holding limits (e.g., a cap of $10,000 per individual wallet) is one mitigation strategy, but holding limits reduce utility.

Programmability risks. A programmable CBDC — one that could expire, be restricted to certain use categories, or require authorization conditions — expands potential monetary policy tools but raises concerns about government control over private spending. Congress has introduced legislation, including the CBDC Anti-Surveillance State Act (H.R. 5403, 118th Congress), specifically to prohibit the Federal Reserve from issuing a retail CBDC without explicit Congressional authorization.

Geopolitical dimension. A U.S. CBDC designed for cross-border use could reinforce dollar primacy in international trade settlement. Failure to act could, in theory, allow alternatives to gain structural footing. Neither outcome is certain, and Federal Reserve officials have stated publicly that the Fed would not proceed without clear direction from Congress and the executive branch.

Common misconceptions

Misconception: A digital dollar already exists. The Federal Reserve has not issued a CBDC. Research and prototyping have occurred, but no issuance decision had been made as of the Fed's publicly available statements through 2024. Existing digital dollars — bank deposits — are liabilities of commercial banks, not of the Federal Reserve.

Misconception: CBDC would replace cash. Federal Reserve research documents consistently describe any potential CBDC as a complement to, not a replacement for, physical currency. The 2022 discussion paper explicitly stated this.

Misconception: FedNow is a CBDC. FedNow is an instant payment messaging network for transfers between commercial bank accounts. It does not change the nature of the money being transferred and does not create a new central bank liability accessible to the public.

Misconception: CBDC is the same as cryptocurrency. CBDC is a centrally issued, centrally governed liability of a sovereign institution. Cryptocurrency is decentralized, issuerless, and typically deflationary by design. The technical use of distributed ledger technology in some CBDC prototypes does not make them cryptocurrencies.

Misconception: All CBDCs are alike. Design choices — wholesale versus retail, token versus account, intermediated versus direct, programmable versus non-programmable — produce fundamentally different instruments with different policy implications. China's e-CNY, the Bahamas' Sand Dollar, and the European Central Bank's digital euro project each represent distinct architectural choices.

Checklist or steps (non-advisory)

The Federal Reserve's stated prerequisites before any CBDC issuance — drawn from the January 2022 discussion paper and subsequent Congressional testimony — include the following elements:

• [ ] Clear legal authority established, either through existing statute or new Congressional authorization
• [ ] Determination that a CBDC provides benefits not achievable through other means (e.g., existing payment systems, FedNow, stablecoins)
• [ ] Resolution of privacy framework — defining what transaction data is retained, by whom, and under what legal authority
• [ ] Assessment of impact on commercial banking system, including deposit migration risk modeling
• [ ] Interoperability standards defined relative to existing payment infrastructure and potential foreign CBDC systems
• [ ] Executive branch support confirmed — Federal Reserve has stated it would not proceed without support from both Congress and the Treasury
• [ ] Public comment period completed — the 2022 discussion paper solicited public input with a comment deadline of May 20, 2022, receiving over 2,000 responses

The monetary policy framework that would govern any CBDC issuance decision remains under active Congressional and Federal Reserve deliberation.

Reference table or matrix