The One Big Beautiful Bill Act (BBB) is the signature legislative achievement of Donald Trump's second term, a Republican tax-and-spending omnibus that extends and expands the 2017 Tax Cuts and Jobs Act (TCJA). It does not embody any single ideological vision: it sutures government-shrinking Reaganism to populist Trumpism, both disfigured by carve-outs for individual lawmakers.
The Senate approved the bill on July 1st 2025 by the thinnest of margins, with J.D. Vance, the vice-president, casting the tie-breaking vote. The House had passed its own version in May 2025 by a single vote. Because the two chambers produced different texts, the House had to vote again on the Senate's variant, which it approved on July 3rd by 218 to 214. The bill did not receive any votes from Democrats in either chamber. Trump signed it into law on July 4th 2025. Elon Musk, the Republicans' biggest donor at the 2024 election, declared himself horrified by its profligacy and pledged to set up a new political outfit, the "America Party", to try to unseat Republicans who voted for it.
The bill extends the TCJA's individual income-tax cuts, which were set to expire at the end of 2025. Top marginal rates remain at 37% rather than reverting to 39.6%. It allows bigger deductions for state and local taxes (SALT) and exempts more wealth from estate tax. Eye-catching campaign pledges are included: the elimination of taxes on tips and overtime pay and a tax break on car loans. The bill also creates "Trump accounts" for newborns, seeded with $1,000 from the federal government. These new provisions expire when Trump leaves office in 2029—the same gimmick used in the TCJA to disguise long-term costs.
The bill includes a $50,000 tax deduction for Native American whaling captains, a provision dear to Lisa Murkowski, a wavering Republican senator from Alaska. Arcane Senate rules prevented Trump from exempting Social Security from tax, as he pledged, so the elderly instead receive a bigger standard deduction.
Preliminary estimates suggest the BBB would add some $4.5trn to American debt over the coming decade. Over the 12 months before its passage, America's budget deficit was 6.7% of GDP. The Congressional Budget Office expects America to run an average annual fiscal deficit of 5.8% of GDP over the decade; the BBB would increase that by a further 1.25 percentage points. America's debt-to-GDP ratio is expected to exceed the 106% reached after the second world war within roughly two years of the bill's passage. America would end up with public debt of more than 120% of GDP. The Senate included a clause to raise the cap on the federal government's debt by $5trn.
Goldman Sachs has estimated that if Congress postpones fiscal tightening for another decade after the BBB, it may then need to cut spending or raise taxes by an annual 5.5% of GDP to stabilise debt-to-GDP—more austerity than the euro zone endured after its sovereign-debt crisis in the 2010s.
The White House's Council of Economic Advisers predicted the BBB would add more than a percentage point to annual GDP growth and generate "$8.5trn to $11.1trn in total offsetting deficit reduction from Trump economic policies". Independent modellers think the growth effects would be a fraction of this. The Social Security and Medicare trust funds are expected to run out of money in 2032.
The Congressional Budget Office calculated that the bill is regressive: the poorest 30% of Americans would be worse off, while the richest 10% would see their income after taxes and transfers increase by 2.3%. Some businesses benefit from the ability to deduct research and development costs in full and depreciate assets more rapidly.
The bill offsets some of its cost by cutting health care and welfare for the poor. It represents the biggest changes to American health policy since the Affordable Care Act in 2010. An evaluation estimates that 12m people would lose health insurance through a variety of cuts to Medicaid and the addition of bureaucratic hurdles, including a requirement for states to reassess recipients' eligibility every six months rather than every year. Many Medicaid recipients will for the first time be obliged to work. Medicaid spending falls by 15% over the next decade, totalling $1trn in cuts. Food-stamp spending faces nearly $300bn in cuts; states will shoulder some of the cost and recipients face more stringent work requirements, resulting in 1.3m fewer recipients.
Researchers at the University of Pennsylvania and Yale estimated the bill could result in over 51,000 extra deaths a year by 2034 once the end of enhanced insurance subsidies is included. Without those subsidies, the CBO expects costs for people buying their own insurance to rise by more than 75% from January 2026. Medicaid payments to hospitals are expected to fall by 18%; more than 300 hospitals could close, particularly in rural areas.
The bill largely rescinds the Inflation Reduction Act. Tax credits for solar, wind and "green" hydrogen are being phased out by 2027-28; electric-vehicle subsidies end in September 2025. The bill maintains IRA tax credits for batteries, nuclear power and geothermal energy, and provides new largesse to fossil-fuel firms, making it cheaper to drill on federal land. Princeton researchers reckon the bill will add 470m tonnes of carbon-dioxide-equivalent emissions in 2035 above what Trump's other policies alone would produce; including executive actions, the excess reaches 1bn tonnes.
Defence and immigration enforcement each receive an extra $150bn or so. Some of the military spending funds the modernisation of America's nuclear weapons and shipbuilding. Golden Dome, Trump's missile-defence shield, receives $25bn.
Nearly $50bn pays for the construction of Trump's border wall along the Mexican border. Another $45bn funds new facilities to detain migrants and a further $35bn is set aside to recruit and pay bonuses to border-patrol and immigration-enforcement officers. In total ICE will receive nearly $75bn over four years—more than the annual budgets of nine federal law-enforcement agencies combined. David Bier of the Cato Institute reckons that the immigration provisions will cost $1trn more than the Congressional Budget Office suggests, owing to the need to continue paying agents and maintaining the bigger border wall beyond 2029.
The bill also restarts leasing of federal land for new oil and gas projects and coal mines. It instructs the interior secretary to conduct at least 30 auctions of offshore oil and gas leases in the "Gulf of America".
A clause deep in the bill reduces the share of wagering losses that are tax-deductible from 100% to 90%, taking effect in 2026. For professional sports bettors, who earn slim margins on large volumes, the change creates "phantom" taxable income that can exceed actual profits. The provision's origins in a Senate Finance Committee amendment baffled even its Republican members, though the $1.1bn it is projected to raise may have been needed to comply with Senate reconciliation rules.
The federal government increasingly needs the revenue raised by high tariffs to help pay for the bill, making trade liberalisation politically harder.
The bill was passed through "reconciliation", a process that allows budget bills to proceed with only 51 Senate votes rather than the 60 needed to overcome a filibuster. To prevent senators from sneaking non-fiscal policies into budget bills, the Senate parliamentarian, Elizabeth MacDonough, applies the Byrd rule to determine what counts as fiscal. MacDonough vetoed elements of the BBB, including certain Medicaid cuts and a measure allowing the sale of federal land. Republicans had to excise or rewrite these provisions. Republicans refused to ask MacDonough about their plan to adopt a different baseline definition of spending to shave trillions off the bill's notional cost.
Thom Tillis, one of three Republican senators to vote against the bill, announced he would not seek re-election after Trump threatened to drum up a primary challenger. Mitch McConnell, the former Senate Republican leader who had shepherded the original 2017 TCJA, cast one of the votes in favour.
Maturity is only a short break in adolescence.