When awarding funding, the U.S. government enters a binding agreement called an obligation. The government promises to spend the money, either immediately or in the future. An agency incurs an obligation, for example, when it places an order, signs a contract, awards a grant, purchases a service, or takes other actions that require it to make a payment.
|Office of Management and Budget (OMB)||
The Office of Management and Budget (OMB) serves the President of the United States in overseeing the implementation of his vision across the Executive Branch. Specifically, OMB’s mission is to assist the President in meeting his policy, budget, management and regulatory objectives and to fulfill the agency’s statutory responsibilities.
An outlay occurs when Federal money is actually paid out, not just promised to be paid ("obligated").