The US national debt has moved beyond $40 trillion, sharpening the question of how sustained federal borrowing could affect household finances over the coming decade. New modeling from The CEO Center, the public policy arm of The Conference Board, suggests the consequences could eventually show up in student debt, mortgages, business financing and retirement income.
The debt passed the $40 trillion threshold on August 18. While that figure is difficult to translate into an individual financial burden, the report focuses instead on the channels through which federal fiscal policy can influence borrowing costs and government benefits.
Five Fiscal Paths Produce Very Different Borrowing Costs
The Conference Board examined five possible fiscal paths through the next decade. Its baseline follows current Congressional Budget Office projections, with federal deficits running at roughly 6% to 7% of gross domestic product. A more favorable scenario cuts the deficit to 3%, while a weaker path pushes it to 9%.
The analysis also considers a one-week federal government default in 2029 and a severe interest-rate shock that would take rates back toward levels associated with the 1980s.
Under the baseline, federal debt reaches 154% of GDP by 2036. The lower-deficit scenario produces a ratio of 126%, while the higher-deficit case takes it to 180%.
The report illustrates the potential household impact through several hypothetical borrowers. A student taking out $45,000 for undergraduate study beginning in 2028, followed by $30,000 for graduate school in 2032, would repay $103,645 under the baseline scenario over standard 10-year repayment periods.
That falls to $102,776 under the lower-deficit case and increases to $104,648 under the higher-deficit path. A simulated default lifts repayment to $106,495, while the extreme rate scenario takes the total to $123,736.
A $600,000 Home Shows How the Pressure Can Compound
Housing illustrates why fiscal conditions could matter well beyond Washington. The report considers a household purchasing a $600,000 property with a 20% down payment and a 30-year fixed-rate mortgage.
For a purchase in 2036, the higher-deficit scenario results in about $24,000 of additional payments compared with the baseline. The modeled government default adds roughly $45,000, while the severe interest-rate scenario increases total payments by around $200,000, equivalent to a 19.2% premium.
A small-business borrower faces a similar exposure. The model assumes expansion loans of $100,000 in 2031 and $150,000 in 2036, with pricing linked to the 10-year Treasury yield plus a 2% bank premium.
Total payments reach $334,747 in the baseline. Deficit reduction cuts that figure by about $6,300, while the higher-deficit scenario adds roughly $6,500. The default scenario increases costs by around $20,000, and the extreme rate case adds approximately $65,000.
The wider implication is that federal borrowing conditions can become relevant to private investment decisions even when households and companies have no direct connection to government debt. If Treasury yields remain higher as investors demand greater compensation for fiscal risk, financing a home, education or business expansion can become more expensive. That can also influence when consumers buy property and when companies decide whether an investment still produces an acceptable return.
Social Security Creates a Different Fiscal Trade-Off
Retirees face another form of exposure. The report cites a CBO projection that Social Security’s trust fund reserves will be depleted in 2032. Without legislative action, benefits would then need to adjust to the level supported by incoming payroll tax revenue.
Its example considers a retiree due to receive $2,466 a month in 2032. The modeled payment falls to $2,293, a monthly reduction of $173. By 2036, the gap reaches $754 a month.
Congress could prevent those reductions through additional federal funding. The analysis estimates that transferring about $2.7 trillion from the general fund between 2032 and 2036 could maintain benefits, but that approach would itself increase federal deficits.
That creates the central policy trade-off highlighted by the modeling. Protecting one group from fiscal pressure can shift costs elsewhere if lawmakers rely on additional borrowing rather than new revenue or spending changes.
Washington’s Next Fiscal Decisions Will Matter
The scenarios are projections rather than forecasts of what households will actually pay. Their significance lies in the size of the gap between different fiscal outcomes, particularly when elevated borrowing costs persist for years.
The CEO Center is calling for measures including a bipartisan fiscal commission, changes to Social Security financing, Medicare payment reform and revisions to the federal budget process.
For households and businesses, the key issue is therefore not the $40 trillion figure in isolation. It is whether future deficits keep Treasury borrowing costs elevated, and how those rates eventually feed through to mortgages, education financing, business investment and the federal programs Americans rely on.
