The Congressional Budget Office has published its latest look at the federal government’s finances over the next three decades.
The numbers do not improve with scrutiny.
Under CBO’s February 2026 long-term projections, federal debt held by the public rises from roughly 101 percent of gross domestic product in 2026 to 120 percent in 2036. By 2056, it reaches 175 percent of GDP.
That is an extraordinary number. Yet buried inside the spreadsheets supporting the projection is another problem that arrives much sooner.
Social Security’s largest trust fund runs out of reserves in 2032.
The combined Social Security trust funds follow in 2033.
And CBO’s long-term federal budget projection generally assumes scheduled Social Security benefits continue to be paid anyway.
That does not make the projection wrong. It does, however, make understanding what CBO is actually projecting rather important.
CBO describes its long-term budget outlook as an illustration of what federal finances and the economy would look like over the next 30 years if current laws generally remained unchanged. It is a baseline, not a prophecy.
The distinction becomes particularly important when Social Security enters the spreadsheet.
The Revenue Line Barely Moves
CBO published a separate workbook containing its 2026 long-term Social Security projections as a supplement to its broader Long-Term Budget Outlook data.
Reading the two together provides a clearer picture than either does alone.
One of the most striking findings is what does not happen.
Social Security tax revenues do not collapse.
In 2026, CBO projects Social Security tax revenues equal to approximately 4.51 percent of GDP.
By 2030, the figure is approximately 4.53 percent.
In 2036 it remains about 4.52 percent.
Even in 2056, Social Security tax revenues are projected at roughly 4.46 percent of GDP.
The revenue line is remarkably stable.
The spending line is not.
Scheduled Social Security outlays equal approximately 5.26 percent of GDP in 2026.
They rise to about 5.61 percent in 2030.
By 2036, that figure reaches 5.91 percent.
By 2056, scheduled outlays remain around 5.79 percent of GDP.
That produces a persistent structural gap between dedicated Social Security tax revenues and scheduled benefits.
In 2026, that difference amounts to approximately 0.75 percent of GDP.
By 2030 it exceeds 1 percent.
In 2036, it reaches approximately 1.38 percent.
The basic problem is therefore not disappearing revenue. It is a system whose scheduled expenditures increasingly exceed the dedicated tax revenues supporting them.
The demographic explanation is not particularly mysterious. In CBO’s 2026 demographic outlook, the agency projects that the population will continue aging while growth slows substantially. Beginning in 2030, CBO expects deaths to exceed births annually. The number and age distribution of Americans directly affect both the workforce paying Social Security taxes and the population receiving retirement benefits.
The economy, meanwhile, continues growing.
CBO’s Social Security tables project nominal GDP increasing from roughly $32.3 trillion in 2026 to approximately $96.5 trillion in 2056.
Taxable payroll rises from about $11.3 trillion to $32.6 trillion.
This is not a projection built around economic collapse.
The economy becomes much larger.
The financing gap survives anyway.
Then the Reserves Disappear
The trust fund numbers make the timeline considerably less abstract.
CBO projects the Old-Age and Survivors Insurance trust fund ratio at 1.53 in 2026. It falls to 1.07 in 2028, 0.60 in 2030, 0.36 in 2031 and 0.12 in 2032.
Then the number disappears.
CBO projects that the OASI trust fund will be exhausted during fiscal year 2032. When the Disability Insurance trust fund is included, combined Social Security reserves are projected to be exhausted in 2033.
Those findings are also laid out in CBO’s March 2026 testimony to the Senate Budget Committee on Social Security’s finances.
Trust fund exhaustion does not mean Social Security suddenly has no money.
Payroll taxes and other Social Security revenues continue arriving after the reserves disappear. The problem is that those revenues would not be sufficient to pay all scheduled benefits.
CBO’s supplemental spreadsheet shows just how large that difference could become.
If benefits after trust fund depletion were limited to amounts payable from available Social Security revenues, combined OASDI benefits would be approximately 23 percent below scheduled benefits in 2034.
The reduction reaches roughly 24 percent during several subsequent years.
The situation is even sharper when OASI is examined independently. CBO’s tables show payable benefits approximately 26 percent below scheduled benefits in 2033, 28 percent below in 2034 and 2035, and 29 percent below in 2036 and 2037.
Those are not predictions that Congress will cut Social Security benefits by those amounts.
They illustrate what the financing mechanism can support if scheduled benefits are compared with revenues available after reserve depletion. CBO’s Social Security testimony specifically describes this as a payable-benefits scenario and emphasizes the uncertainty surrounding long-term projections.
And that distinction leads directly into one of the stranger features of the federal government’s long-term budget projections.
Two Futures Inside the Same Spreadsheet
For purposes of its federal budget baseline, CBO generally assumes that Social Security will continue paying scheduled benefits.
Its Social Security analysis simultaneously calculates what benefits would look like if payments were instead limited by available program revenues after trust fund exhaustion.
Both calculations are useful.
They are also very different futures.
In one, scheduled benefits continue after the reserves financing the existing gap have disappeared.
In the other, payable benefits fall substantially below scheduled benefits.
Congress does not have to accept either outcome untouched. Lawmakers could change taxes, alter benefits, transfer money, restructure portions of the program, adopt some combination of those approaches, or pursue other legislative changes.
CBO is not predicting what Congress will do.
It is displaying the arithmetic of what happens under specified assumptions.
That distinction becomes increasingly important because Social Security is only one part of the government’s larger fiscal problem.
Interest Eventually Costs More Than Social Security
According to CBO’s 2026 Budget and Economic Outlook, federal debt held by the public reaches approximately 120 percent of GDP in 2036.
The annual federal deficit reaches roughly $3.1 trillion that year, equal to about 6.7 percent of GDP.
Then the interest bill becomes a problem of its own.
By 2056, CBO projects net federal interest spending equal to approximately 6.9 percent of GDP.
Social Security spending is projected at roughly 6 percent.
Put differently, under CBO’s long-term baseline, the federal government eventually spends a larger share of the entire national economy servicing its debt than it spends on Social Security.
Interest does not provide retirement benefits, build roads, purchase aircraft, inspect food, or prosecute crimes.
It services previous borrowing.
And as debt accumulates, interest becomes another source of deficits, which can require additional borrowing, which produces additional interest.
By 2056, debt held by the public reaches 175 percent of GDP.
Yet the most consequential decisions may arrive more than two decades before that endpoint.
The Fiscal Collision Arrives Earlier Than 2056
The timelines from CBO’s two workbooks can be placed beside each other.
Social Security already spends more than its dedicated tax revenues in 2026.
The OASI trust fund is projected to exhaust its reserves in 2032.
Combined Social Security trust fund reserves are projected to be exhausted in 2033.
By 2034, payable combined benefits would be roughly 23 percent below scheduled benefits if payments were limited by available Social Security financing.
By 2036, federal debt reaches approximately 120 percent of GDP while the annual deficit reaches 6.7 percent.
Then the debt and interest burden continue climbing for another 20 years.
The Social Security financing decision does not wait for the broader debt problem to arrive.
It gets there first.
That makes the headline number of 175 percent debt-to-GDP somewhat deceptive as a measure of when the problem becomes important.
Washington does not have 30 years before it encounters the arithmetic.
According to CBO’s own projections, one of the largest federal programs reaches its financing crossroads within roughly seven years.
And Then Reality Changed Five Days Before Publication
There is one final wrinkle in CBO’s 30-year outlook that demonstrates just how carefully these projections should be interpreted.
CBO released its long-term outlook data on February 25, 2026.
The agency included an unusual but important qualification.
Its projections did not incorporate the budgetary or economic effects of the Supreme Court’s February 20 ruling concerning tariffs.
Five days.
CBO produced a federal fiscal projection extending three decades into the future while acknowledging that a major event occurring five days before publication had already changed part of the landscape underlying the baseline.
That is not a criticism of CBO. Producing long-term economic projections requires freezing assumptions at some point. Otherwise, the spreadsheet would never leave the building.
It is, however, an excellent demonstration of what a baseline actually represents.
And we no longer have to speculate about whether the omitted tariff developments were financially meaningful.
In an August update to its tariff projections, CBO estimated that trade-policy changes through July 31 would increase cumulative federal deficits during fiscal years 2027 through 2036 by approximately $900 billion compared with the agency’s February baseline.
About $700 billion of that difference comes from larger primary deficits. Another $200 billion comes from additional debt-service costs.
CBO said the increase was largely driven by the removal of tariffs imposed under the International Emergency Economic Powers Act following the Supreme Court decision. The administration subsequently imposed other tariffs, but CBO projected that those would generate less revenue than the tariffs removed after the ruling.
That $900 billion should not simply be pasted onto CBO’s 2056 debt number. Tariff policy affects revenue, prices, trade, economic activity and debt-service costs, and the policies themselves have changed repeatedly.
But the episode provides a useful reminder.
Thirty years is a very long time in federal budgeting.
Apparently, five days can be enough.
The Spreadsheet Is Not the Future
None of CBO’s projections establish that federal debt will equal exactly 175 percent of GDP in 2056.
CBO itself warns that its baseline projections are subject to considerable uncertainty and that future legislation, administrative actions, judicial decisions and economic developments could produce markedly different results.
They do not establish that Congress will allow scheduled Social Security benefits to exceed dedicated financing indefinitely.
Nor do they establish that lawmakers will permit payable benefits to fall roughly one-quarter below scheduled amounts after trust fund depletion.
Those are policy questions that remain unresolved.
What CBO’s spreadsheets do establish is the scale of the arithmetic confronting whoever eventually has to resolve them.
Social Security’s dedicated revenue remains relatively stable while scheduled expenditures exceed it. Trust fund reserves absorb the difference for a while. Those reserves eventually disappear.
At roughly the same time, the broader federal government is running persistent deficits, accumulating more debt and devoting an increasingly large share of national economic output simply to paying interest.
CBO can project that process all the way to 2056.
Congress does not have the luxury of waiting that long to decide what happens next.
Sources: CBO, The 2026 Long-Term Budget Outlook (February 2026); CBO, The Budget and Economic Outlook: 2026 to 2036; CBO, The Demographic Outlook: 2026 to 2056; CBO, Social Security’s Finances: March 2026 Senate Budget Committee testimony; CBO, August 2026 update on tariff revenue effects.
