Treasury says the debt is $40 trillion. The Conference Board priced it per household.

Treasury data confirmed that U.S. national debt now stands at $40 trillion, and the government is expected to spend more than $1 trillion on interest in fiscal 2026 ^[1]. The Conference Board has published a model that translates that trajectory into household line items, which matters because it drags the argument off the GDP-ratio slide and onto amortisation schedules and benefit statements ^[2].

The structure is three fiscal paths plus two tails. Baseline uses Congressional Budget Office current-trend data; a good case halves federal deficits, in line with current targeting proposals; a bad case takes deficits to 9% of GDP from the current 6% to 7% ^[3]. On top of that sit a default scenario and an interest rate shock, the sort of tail risk Bridgewater founder Ray Dalio has long flagged ^[4].

The mortgage case is the most concrete. A family saves for a $600,000 house, puts 20% down and takes a 30-year fixed, buying either in 2031 or 2036 ^[5]. Baseline total payments over three decades come to $2.89 million for the 2031 purchase and $2.8 million for 2036 ^[6]. Under the good case, that falls by $53,000 for the 2031 buyer and by more than $100,000 for the 2036 buyer ^[7]. Read as a share of the total, $53,000 is roughly 1.8% of baseline payments ^[1] - real money, but not a number that survives being called catastrophic. The larger caveat: the report does not publish a methodology for the mortgage rates it assumes in 2031 and 2036 ^[8], so the gap between a $2.89 million earlier purchase and a $2.8 million later one, with double the savings attached to the later one, is not reconcilable from the outside.

The tails do move. Total payments on that 2031 home exceed $3 million under a default and $3.6 million under an extreme rate shock ^[9]. The shock case is about $710,000 above baseline, roughly 25% more ^[2]. There are reasons to discount it. Fortune notes the Federal Reserve can lower the real value of the debt through quantitative easing, which is inflationary but avoids the fallout of an outright default ^[10], and that currently elevated Treasury yields reflect long-term inflation expectations and bets on Fed policy as well as fiscal worry ^[11].

The retirement figures are the ones operators with older workforces should read. The Social Security trust fund is due to run dry in a little under eight years and Medicare in a little under seven, per the Committee for a Responsible Federal Budget ^[12]. The Conference Board says the Treasury would then face a decision on whether to backfill $2.7 trillion from the general fund, per CBO ^[13]. If payouts are cut instead, monthly benefits fall $173 short of current expectations in 2032, $705 in 2033, $721 in 2034 and $754 by 2036 ^[14]. The 2033 figure is about $8,460 a year ^[3] and roughly four times the 2032 shortfall ^[4] - a cliff, not a slope.

Michael Peterson of the Peterson Institute told Fortune that heavy federal borrowing "drives up interest rates, which then increases household expenses because your mortgage goes up, your car loan, your credit card bills, and inflation more generally," so households pay through taxes and inflated expenses rather than a monthly bill ^[15].

What to watch: whether the deficit-halving proposals underpinning the good case survive a midterm cycle in which voters are already ranking the issue higher ^[16], and the repricing risk buried in the arithmetic. More than $1 trillion of interest on $40 trillion implies an average cost of about 2.5% ^[5], which is what makes each year of refinancing at current coupons expensive. The report's own conclusion is blunter: "Neglecting the problem will not make it better" ^[17].