The US monetary system faces significant challenges from advances in technology and changes in the macroeconomy that, left unaddressed, will threaten the stability of the US economy and financial system. At the same time, low interest rates mean that central banks will not have the policy ammunition they had in the past during the next recession. The Federal Reserve needs new tools to meet its mandates of price stability and maximum employment. It also needs to preserve the safety and soundness of the financial system in a rapidly digitizing world. The authors propose a Fed-backed digital currency to solve both problems. Their proposal creates a regulated system of digital currency accounts for consumers managed by digital payment providers and fully backed by reserves at the Fed. The system would be limited in size, to preserve the functions and stability of the existing banking system. Fed backing would mean low capital requirements, which would in turn facilitate competition. Low fees and no minimum balance requirements in the new system would also help financial institutions reach the roughly 25 percent of the US population that is currently either unbanked or underbanked. Digital accounts for consumers could also provide a powerful new stabilization tool for both monetary and fiscal policies. For fiscal policy, it could facilitate new automatic stabilizers while also allowing the Fed to provide quantitative easing directly to consumers. This tool could be used in a timely manner with broad reach to all Americans.