The US government recorded a $144.7 billion budget deficit in December 2025, compared with a $86.7 billion deficit in the same month a year earlier. Receipts rose 6.6% year on year to $484.4 billion, driven by individual income taxes ($242.34 billion), social insurance and retirement receipts ($143.16 billion), and customs duties ($27.89 billion). The increase reflected seasonal and collection timing effects that supported tax and customs receipts in the month. Meanwhile, outlays rose 16.3% year on year to $629.1 billion, with Social Security ($144.90 billion), Health and Medicare ($216.54 billion), and national defense ($98.30 billion) the largest spending categories, while the timing of several payments, including Medicare and veterans’ benefits, influenced the monthly outturn.