Congressional Budget Office Estimates Cost of Newly Proposed Gun Control Bill

Lawmakers are turning to the Congressional Budget Office to put a price tag on a newly introduced federal gun control proposal that would tighten rules on assault-style firearms and expand oversight of gun sales. The estimate is emerging as a central data point in a debate that mixes constitutional arguments with questions about how much taxpayers should spend to enforce tougher gun laws. By quantifying staffing, technology, and grant costs, the CBO analysis is helping determine whether the bill is cast as a targeted safety measure or an expensive new federal mandate.

The fight over cost is more than an accounting exercise. It will shape whether moderates in both parties view the measure as fiscally responsible and will influence how advocates argue that the spending compares with the financial toll of gun violence on hospitals, schools, and local police. The new estimate also builds on earlier CBO work on firearms legislation, giving Congress a clearer picture of what it takes to regulate weapons that some lawmakers describe as “Assault Weapons” while others defend as protected arms.

What the CBO is measuring in the new estimate

The starting point for any cost estimate is the CBO’s baseline for federal spending and revenue, which is maintained in a public database of cost estimates for pending legislation. For the new gun control bill, analysts are expected to examine how new licensing rules, expanded background checks, and enforcement provisions would change spending for agencies such as the Department of Justice and the Bureau of Alcohol, Tobacco, Firearms and Explosives. That review typically includes assumptions about how many new staff would be needed to process applications, conduct inspections, and pursue violations, as well as how much technology and training would cost over the next decade.

Recent CBO work on firearms policy provides a roadmap for what the office is likely to count. A cost estimate for a firearms-related measure, identified as H.R. 2159, projected how new investigative authority and compliance obligations would affect federal enforcement spending over the standard ten-year budget window, and the document for H.R. 2159shows how analysts break out direct spending, discretionary appropriations, and potential revenue effects. The new gun control bill is expected to follow a similar structure, with tables that separate mandatory costs, such as benefits for additional federal employees, from discretionary items that would depend on annual appropriations.

How the proposal fits within existing federal gun laws

The text of the new bill appears to borrow heavily from earlier proposals to regulate assault-style firearms, including S.1531, which is labeled as the “Assault Weapons Ban of 2025” and begins with the formal declaration “A BILL To regulate assault weapons, to ensure that the right to keep and bear arms is not unlimited, and for other purposes.” The Senate text for S.1531 defines which semiautomatic rifles, pistols, and shotguns would be covered and sets out a list of features that would qualify a firearm as an “assault weapon.” Any new House proposal that mirrors this language would likely trigger similar enforcement needs, including the creation of updated registries, expanded tracing, and new compliance checks for dealers.

Federal lawmakers are also legislating in the shadow of state-level restrictions and past federal bans. A legislative brief on Maryland’s statute notes that Congress previously enacted an assault weapons ban as part of Public Law 103-322 in 1994, and that measure later expired in 2004. The same analysis points out that Some Members of Congress have introduced additional bills labeled as “Assault Weapons” proposals, reflecting a long-running effort to limit certain semiautomatic rifles and high-capacity magazines. The congressional research summary for Public Law 103-322 underscores that the courts have already weighed in on the constitutionality of state bans, which gives current lawmakers a clearer legal backdrop as they consider new federal restrictions.

Enforcement, licensing, and the role of the Justice Department

The cost of the new bill will hinge on how aggressively Congress wants the Justice Department to police gun sellers and buyers. A recent analysis of firearms licensing requirements, accessible through the Homeland Security Digital Library, describes how current law requires applicants for certain gun-related licenses to meet specific criteria and gives regulators authority to suspend or revoke licenses for violations. That document explains that under existing rules, the department must provide notice of violations and, in some cases, allow a licensee 30 days after receiving notification of a violation to correct the problem before more severe penalties are imposed. Those procedural protections, detailed in the licensing analysis, add staff time and legal costs that the CBO must factor into any new enforcement regime.

Lawmakers are also considering whether to institutionalize gun violence prevention work inside the Justice Department. The Office of Gun Violence Prevention Act of 2025, promoted by Congresswoman Veronica Escobar, would create a permanent office within the U.S. Department of Justice dedicated to coordinating strategy, grants, and research on shootings. The description of the Office of Gun highlights that such an office would centralize efforts that are now scattered across multiple agencies. If the new gun control bill folds similar structural changes into its text, the CBO will need to estimate startup costs for a new office, including leadership positions, analysts, and grant managers.

Comparisons with other recent CBO firearm and justice estimates

To understand the scale of the new proposal, budget analysts and lawmakers are already comparing it to other justice and public safety bills that have gone through the CBO process. One recent example is H.R. 2184, a measure that required new activities within the Department of Justice and other agencies, prompting a detailed estimate of how many full-time equivalent employees would be required and how much those positions would cost over ten years. The cost estimate for H.R. 2184 illustrates how programmatic expansions, even when relatively narrow, can add tens or hundreds of millions of dollars in discretionary spending once salaries, benefits, and support services are included.

Another reference point is H.R. 2243, a bill that affected law enforcement operations and required new reporting and oversight duties. The CBO’s work on H.R. 2243 shows how even modest mandates, such as additional data collection or training requirements, can generate recurring costs that Congress must either fund or leave unfunded as unfunded mandates on state and local partners. For the new gun control bill, similar dynamics will apply if the legislation directs federal agencies to support state background check systems, provide technical assistance to local police, or administer grant programs to help courts implement red flag laws.

Fiscal politics, revenue effects, and the broader gun debate

Beyond direct spending, lawmakers are watching for any revenue implications that the CBO might attach to the new bill. If the proposal raises licensing fees, imposes new civil penalties on noncompliant dealers, or changes excise taxes on certain firearms, those provisions would show up as revenue increases that partially offset enforcement costs. Past CBO work on tax and regulatory legislation, summarized in analyses of how The CBO, the Congressional Budget Office, or CBO scores major bills, shows that even relatively small revenue changes can become central talking points when supporters want to argue that a measure is fiscally responsible. A prior report on a Republican tax proposal, for example, noted that the CBO had tallied the major portions of the bill even before a full estimate was published, giving both sides ammunition in the debate over whether the legislation would redistribute wealth upwards.