Glossary term
Full-Reserve Banking
Full-reserve banking is a banking model in which demand deposits are backed one-for-one by reserves rather than being lent out through fractional-reserve banking.
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What Is Full-Reserve Banking?
Full-reserve banking is a banking model in which demand deposits are backed one-for-one by reserves rather than being lent out through fractional-reserve banking. In a strict version, the institution that holds transaction deposits keeps enough cash or central bank reserves to meet all demand deposit claims at once.
The idea separates the payment function of banking from the credit-creation function. Deposits used like money would be fully backed. Lending would have to be funded by equity, longer-term debt, investment accounts, or other non-demand funding sources.
Key Takeaways
- Full-reserve banking requires demand deposits to be backed by reserves at or near 100%.
- It is often proposed as a way to reduce bank-run risk and limit deposit-funded money creation.
- The tradeoff is that ordinary bank lending would need different funding sources.
- Modern policy debates often overlap with narrow banking, central bank reserves, and payment-system design.
How It Differs From Fractional-Reserve Banking
In fractional-reserve banking, banks hold some reserves but also make loans and buy assets against deposit liabilities. That model supports credit intermediation and money creation through bank balance sheets. It also creates liquidity risk because depositors may want immediate access while bank assets are longer term or less liquid.
Full-reserve banking changes that balance-sheet structure. A deposit account meant for payments would be more like a custody or transaction account backed by reserves. Lending would move to separate funding channels where investors knowingly accept credit and liquidity risk.
Potential Benefits
Supporters argue that full-reserve banking could make transaction deposits safer, reduce the risk of classic deposit runs, simplify deposit guarantees, and limit the expansion of private money through bank lending. It can also make the payment system easier to understand because deposit claims are matched by reserve assets.
The appeal grows during banking stress, when people worry about whether demand deposits and long-term bank assets can coexist safely without public backstops.
Tradeoffs and Critiques
The model also has major tradeoffs. If banks cannot fund loans with demand deposits, credit may become more expensive or shift to capital markets and nonbank lenders. The transition could disrupt bank profitability, monetary policy implementation, and the supply of business and household credit.
A full-reserve bank can still have operational risk, fraud risk, technology risk, and business-model risk. Reserve backing reduces one kind of liquidity mismatch; it does not make every financial activity risk-free.
Full-Reserve Banking and the Money Multiplier
In the textbook money-multiplier story, lower reserve requirements can allow the banking system to create more deposit money from a given base of reserves. Full-reserve banking pushes the reserve ratio toward 100%, which would eliminate that particular deposit expansion channel for demand deposits.
Modern monetary systems are more complicated than the simple multiplier model. Central banks can operate with ample reserves, and bank lending is constrained by capital, funding, borrower demand, risk appetite, regulation, and interest rates, not only by reserve ratios.
The Bottom Line
Full-reserve banking is a proposal to fully back demand deposits with reserves and separate payments from lending. It can reduce deposit-run risk in theory, but it would also reshape credit creation, bank funding, and the way monetary policy interacts with the banking system.