This report describes and analyzes annual appropriations for the Department of Homeland Security (DHS) for FY2016. It compares the enacted FY2015 appropriations for DHS, the Administration's FY2016 budget request, the appropriations proposed by Congress in response, and those enacted thus far. This report identifies additional informational resources, reports, and products on DHS appropriations that provide additional context for the discussion, and it provides a list of CRS policy experts whom clients may consult with inquiries on specific topics. The suite of CRS reports on homeland security appropriations tracks legislative action and congressional issues related to DHS appropriations, with particular attention paid to discretionary funding amounts. The reports do not provide in-depth analysis of specific issues related to mandatory funding—such as retirement pay—nor do they systematically follow other legislation related to the authorization or amending of DHS programs, activities, or fee revenues. Discussion of appropriations legislation involves a variety of specialized budgetary concepts. The Appendix to this report explains several of these concepts, including budget authority, obligations, outlays, discretionary and mandatory spending, offsetting collections, allocations, and adjustments to the discretionary spending caps under the Budget Control Act ( P.L. 112-25 ). A more complete discussion of those terms and the appropriations process in general can be found in CRS Report R42388, The Congressional Appropriations Process: An Introduction , by [author name scrubbed], and the Government Accountability Office's A Glossary of Terms Used in the Federal Budget Process . Except in summary discussions and when discussing total amounts for the bill as a whole, all amounts contained in the suite of CRS reports on homeland security appropriations represent budget authority and are rounded to the nearest million. However, for precision in percentages and totals, all calculations were performed using unrounded data. Data used in this report for FY2015 amounts are derived from the Department of Homeland Security Appropriations Act, 2015 P.L. 114-4 ) and the explanatory statement that accompanied H.R. 240 as printed in the Congressional Record of January 13, 2015, pages H275-H322. Contextual information on the FY2016 request is generally from the Budget of the United States Government, Fiscal Year 2016 , the FY2016 DHS congressional budget justifications, and the FY2016 DHS Budget in Brief . However, most data used in CRS analyses in reports on DHS appropriations is drawn from congressional documentation to ensure consistent scoring whenever possible. Data on the FY2016 budget request and Senate-reported recommended funding levels are from S. 1619 and S.Rept. 114-68 . Information on the House-reported recommended funding levels is from H.R. 3128 and H.Rept. 114-215 . Data for FY2016 are derived from P.L. 114-113 , the Omnibus Appropriations Act, 2016—Division F of which is the Homeland Security Appropriations Act, 2016—and the accompanying explanatory statement published in Books II and III of the Congressional Record for December 17, 2015. Generally, the homeland security appropriations bill includes all annual appropriations provided for DHS, allocating resources to every departmental component. Discretionary appropriations provide roughly two-thirds to three-fourths of the annual funding for DHS operations, depending how one accounts for disaster relief spending and funding for overseas contingency operations. The remainder of the budget is a mix of fee revenues, trust funds, and mandatory spending. Appropriations measures for DHS typically have been organized into five titles. The first four are thematic groupings of components: Title I, Departmental Management and Operations, the smallest of the first four titles, contains appropriations for the Office of the Secretary and Executive Management (OSEM), the Office of the Under Secretary for Management (USM), the Office of the Chief Financial Officer, the Office of the Chief Information Officer (CIO), Analysis and Operations (A&O), and the Office of the Inspector General (OIG). The Administration requested $1,396 million in FY2016 net discretionary budget authority for components included in this title. The appropriations request was $255 million (22.3%) more than was provided for FY2015. Senate-reported S. 1619 envisioned the components included in this title receiving $1,346 million in net discretionary budget authority. This would have been $50 million (3.6%) less than requested, but $205 million (18.0%) more than was provided in FY2015. House-reported H.R. 3128 envisioned the components included in this title receiving $1,217 million in net discretionary budget authority, a $179 million (12.8%) decrease from the request and $76 million (6.7%) above FY2015. Division F of P.L. 114-113 included $1,546 million in net discretionary budget authority for the components in this title, a $150 million (10.7%) increase from the request and $405 million (35.5%) above FY2015. Title II, Security, Enforcement, and Investigations, comprising roughly three-quarters of the funding appropriated for the department, contains appropriations for Customs and Border Protection (CBP), Immigration and Customs Enforcement (ICE), the Transportation Security Administration (TSA), the Coast Guard (USCG), and the Secret Service. The Administration requested $32,481 million in FY2016 net discretionary budget authority for components included in this title, as part of a total budget for these components of $39,431 million for FY2016. The appropriations request was $807 million (2.5%) more than was provided for FY2015. Senate-reported S. 1619 envisioned the components included in this title receiving $32,484 million in net discretionary budget authority. This would have been $3 million (0.01%) more than requested, and $810 million (2.6%) more than was provided in FY2015. House-reported H.R. 3128 envisioned the components included in this title receiving $32,182 million in net discretionary budget authority. This would have been $299 million (0.9%) less than requested, and $508 million (1.6%) more than was provided in FY2015. Division F of P.L. 114-113 included $33,062 million in net discretionary budget authority for the components in this title, a $581 million (1.8%) increase from the request and $1,388 million (4.4%) above FY2015. Title III, Protection, Preparedness, Response, and Recovery, the second-largest of the first four titles, contains appropriations for the National Protection and Programs Directorate (NPPD), the Office of Health Affairs (OHA), and the Federal Emergency Management Agency (FEMA). The Administration requested $6,222 million in FY2016 net discretionary budget authority for components included in this title, as part of a total budget for these components of $19,020 million for FY2016. The appropriations request was $267 million (4.5%) more than was provided for FY2015. Senate-reported S. 1619 envisioned the components included in this title receiving $6,291 million in net discretionary budget authority. This would have been $69 million (1.1%) more than requested, and $336 million (5.6%) more than was provided in FY2015. House-reported H.R. 3128 envisioned the components included in this title receiving $6,122 million in net discretionary budget authority. This would have been $100 million (1.6%) less than requested, and $167 million (2.8%) more than was provided in FY2015. Division F of P.L. 114-113 included $6,353 in net discretionary budget authority for the components in this title, a $131 million (2.1%) increase from the request and $398 million (6.7%) above FY2015. Title IV, Research and Development, Training, and Services, the second-smallest of the first four titles, contains appropriations for the U.S. Citizenship and Immigration Services (USCIS), the Federal Law Enforcement Training Center (FLETC), the Science and Technology Directorate (S&T), and the Domestic Nuclear Detection Office (DNDO). The Administration requested $1,554 million in FY2016 net discretionary budget authority for components included in this title, as part of a total budget for these components of $5,427 million for FY2016. The appropriations request was $251 million (13.9%) less than was provided for FY2015. Senate-reported S. 1619 envisioned the components included in this title receiving $1,451 million in net discretionary budget authority. This would have been $103 million (6.6%) less than requested, and $344 million (19.2%) less than was provided in FY2015. House-reported H.R. 3128 envisioned the components included in this title receiving $1,503 million in net discretionary budget authority. This would have been $51 million (3.3%) less than requested, and $302 million (16.3%) less than was provided in FY2015. Division F of P.L. 114-113 included $1,499 in net discretionary budget authority for the components in this title, a $55 million (2.2%) decrease from the request and $296 million (16.5%) below FY2015. A fifth title contains general provisions, the impact of which may reach across the entire department, impact multiple components, or focus on a single activity. Rescissions of prior-year appropriations—cancellations of budget authority that reduce the net funding level in the bill—are found here. The Administration proposed rescinding $255 million in prior-year appropriations as part of its FY2016 budget request.