Congressional Glossary
What is a pocket veto?
A pocket veto kills a bill through presidential inaction. If Congress adjourns during the 10 days the president has to act, an unsigned bill simply dies, and Congress gets no chance to override.
In one sentence
A pocket veto kills a bill through presidential inaction. If Congress adjourns during the 10 days the president has to act, an unsigned bill simply dies, and Congress gets no chance to override.
The window: 10 days, Sundays excepted, after a bill reaches the president
What a pocket veto is
A pocket veto is a veto by silence. When Congress sends the president a bill, Article I, Section 7 starts a 10-day clock, Sundays excepted. A regular veto means returning the bill with objections. A pocket veto requires nothing: the president holds the bill, Congress adjourns, and the bill dies. The Constitution's own words carry the doctrine, providing that an unsigned bill becomes law "unless the Congress by their Adjournment prevent its Return" (constitution.congress.gov).
The 10-day clock runs two ways
Presidential inaction means opposite things depending on the calendar. If Congress stays in session and the president neither signs nor vetoes within the 10 days, the bill becomes law without a signature. If Congress has adjourned and the president does nothing, the bill is dead. Same silence, opposite result. That flip is why end-of-session bills carry real risk: a measure passed in the final days of a Congress hands the president a cost-free kill.
No override, no return
A regular veto goes back to Congress, which can enact the bill anyway with two-thirds of each chamber; see veto override. A pocket-vetoed bill never comes back, because there is no chamber in session to receive it. The only remedy is to start over and pass the bill again. That makes the pocket veto stronger than the regular kind, which is exactly why presidents and Congresses have fought for two centuries over when an adjournment truly prevents return.
Pocket vetoes in history
Presidents have pocket-vetoed 1,066 bills since 1789, against 1,584 regular vetoes, by the Senate's official count (senate.gov). James Madison recorded the first in 1812, and Franklin Roosevelt used the device more than any other president. It has since gone quiet. Recent presidents have avoided it, partly because of the legal disputes it invites and partly because Congress learned how to close the window. Modern presidents who doubt a bill's timing sometimes issue a protective return veto, sending a formal veto message even during a break, precisely so that nobody has to litigate whether a pocket veto was valid.
How Congress blocks the pocket veto
The defense is to never really adjourn. Both chambers now hold brief pro forma sessions, gavel-in, gavel-out meetings every few days, during breaks that once would have been formal adjournments. If Congress is technically in session, its absence cannot prevent a bill's return, so an unsigned bill becomes law instead of dying. The same practice blocks recess appointments, which is why pro forma sessions became standard.
Common questions
A pocket veto happens when the president takes no action on a bill and Congress adjourns during the 10-day signing window, Sundays excepted. The bill dies without a signature or a veto message, and Congress gets no opportunity to vote on an override.
No. An override requires the vetoed bill to be returned to Congress, and a pocket veto works precisely because adjournment prevented that return. The only recourse is to pass the bill again in a new session and put it back on the president's desk.
Ten days, not counting Sundays, from the day the bill is presented. If Congress is in session and the president does nothing, the bill becomes law without a signature. If Congress has adjourned, the unsigned bill dies by pocket veto instead.