How Record U.S. Government Debt Could Influence Taxes, Interest Rates, and Future Spending

The size of the national debt does not automatically mean that Americans will immediately face higher taxes or higher interest rates. However, as the government continues borrowing large amounts of money, the cost of servicing that debt can consume a growing share of the federal budget.

That creates an important long-term question: How could record U.S. government debt influence taxes, interest rates, and government spending in the years ahead?

The Congressional Budget Office (CBO) projects that federal debt held by the public will rise from about 101% of GDP in 2026 to 120% in 2036 under current law. The agency also projects that net federal interest costs will increase from about $1 trillion in 2026 to $2.1 trillion in 2036.

These trends could eventually affect the choices available to lawmakers and the financial environment experienced by American households.

In this comprehensive guide, readers will learn:

• Why U.S. government debt has reached historically high levels
• What the federal deficit has to do with rising debt
• How government borrowing can influence interest rates
• Why Treasury yields matter for mortgages and consumer loans
• Whether higher debt could eventually lead to higher taxes
• How interest payments could compete with other government priorities
• Why Social Security and Medicare are important to the future budget
• How rising debt could affect government assistance programs
• What higher borrowing costs could mean for businesses and workers
• Why today’s debt decisions could influence future generations
• What Americans should watch throughout the rest of 2026

Why U.S. Government Debt Is Becoming a Bigger Issue

Federal debt grows when the government spends more than it collects in revenue and finances the difference through borrowing.

This annual gap is known as the budget deficit.

According to the CBO’s February 2026 baseline, the federal government is projected to run a deficit of approximately $1.9 trillion in fiscal year 2026. Federal outlays are projected at $7.4 trillion, compared with approximately $5.6 trillion in revenues.

The problem becomes more significant when deficits remain large for many years.

Instead of borrowing temporarily during a recession or emergency, the government continues adding debt during periods when the economy is still growing.

CBO projects that the deficit could reach $3.1 trillion by 2036, equal to 6.7% of GDP.

Debt and deficits are not the same thing

These terms are often used interchangeably, but they describe different concepts.

The deficit represents how much the government is short during a particular fiscal year.

The national debt represents the accumulation of borrowing over time.

In simple terms:

Annual deficits → additional borrowing → higher federal debt

When deficits remain large, the debt generally continues to increase unless revenues rise, spending falls, or economic growth becomes strong enough to change the debt-to-GDP relationship.

Federal Debt Is Already Larger Than the Size of the Economy

One of the most closely watched measurements is federal debt held by the public as a percentage of GDP.

CBO projects that debt held by the public will equal approximately 101% of GDP in 2026. Under its baseline, that figure rises to 120% by 2036.

That would put federal debt well above the previous post-World War II record of approximately 106% of GDP.

CBO also projects that debt could reach 175% of GDP by 2056 under current-law assumptions.

These are projections, not guaranteed outcomes.

Future tax legislation, spending decisions, economic growth, inflation, interest rates, demographic changes, and other developments could produce substantially different results.

Nevertheless, the projections illustrate why federal debt is increasingly becoming a long-term policy concern.

Rising Interest Costs Could Become One of the Biggest Budget Pressures

One of the most direct consequences of a larger federal debt is that the government has to pay more interest to the investors who hold Treasury securities.

In 2026, CBO projects net interest costs of slightly more than $1 trillion.

By 2036, those costs are projected to reach approximately $2.1 trillion, or 4.6% of GDP.

This creates a compounding problem.

When the government has more debt, there is more debt on which interest must be paid. If interest rates are also higher, the cost of refinancing maturing debt and issuing new debt increases.

The government can then face higher interest expenses even without creating a new program.

Why interest costs matter

Interest payments are different from many other forms of federal spending.

The government cannot simply decide to stop paying interest on Treasury securities without creating serious financial consequences.

As a result, rising interest costs can reduce the amount of money available for other priorities.

CBO projects that net interest costs will rise from 3.3% of GDP in 2026 to 4.6% in 2036.

That means a growing share of federal resources could eventually be dedicated to servicing existing debt rather than funding new initiatives.

Could Government Debt Push Interest Rates Higher?

This is one of the most important questions for American consumers.

Federal borrowing does not mechanically determine mortgage or credit-card rates. Interest rates are influenced by many factors, including monetary policy, inflation expectations, economic growth, financial markets, and global demand for U.S. assets.

However, heavy government borrowing can place upward pressure on borrowing costs.

When the federal government issues large quantities of Treasury securities, it competes with other borrowers for available financial resources.

CBO notes that large and growing debt can raise borrowing costs throughout the economy, potentially reducing private investment and slowing economic growth.

This does not mean that every increase in federal debt immediately raises mortgage rates.

Instead, it represents a potential long-term pressure on financial markets.

Treasury Yields Matter for American Borrowers

Treasury securities serve as an important reference point for financial markets.

On September 8, 2026, the effective federal funds rate was 3.63%, while the bank prime loan rate was 6.75%.

Longer-term Treasury yields also influence the broader cost of borrowing.

For example, mortgage rates tend to respond strongly to longer-term bond yields and expectations about future interest rates.

That means persistent concerns about government borrowing, inflation, or future Treasury supply could contribute to higher long-term yields under certain conditions.

If that happens, Americans could potentially experience higher costs for:

• Mortgages
• Business loans
• Auto financing
• Personal loans
• Corporate borrowing
• Some other forms of consumer credit

The relationship is not one-to-one, but the connection is important.

What Could Higher Government Debt Mean for Mortgage Rates?

Homebuyers are particularly sensitive to interest rates.

A small difference in a mortgage rate can substantially change the total amount paid over the life of a 30-year loan.

If long-term Treasury yields remain elevated because investors demand greater compensation for inflation, borrowing risk, or the growing supply of government debt, mortgage rates could also face upward pressure.

For example, a household purchasing a home with a large mortgage may see its monthly payment change significantly when rates move by even a fraction of a percentage point.

This is one reason why federal debt can matter to households even when the government is not directly changing mortgage rules.

Could Americans Eventually Face Higher Taxes?

Higher government debt does not automatically mean that tax rates will increase.

Congress can address fiscal pressure through multiple approaches, including:

• Raising taxes
• Reducing spending
• Changing eligibility rules
• Increasing economic growth
• Reducing certain programs
• Changing tax deductions or credits
• Increasing other forms of federal revenue
• Allowing inflation and economic growth to alter the debt burden

However, if federal spending continues to exceed revenues by large amounts, pressure for additional revenue can increase.

CBO projects federal revenues at 17.5% of GDP in 2026 and 17.8% in 2036 under current-law assumptions.

That is important because it shows that simply assuming economic growth will automatically solve the debt problem may not be enough.

Taxes do not have to rise through higher tax rates

Future tax increases could take different forms.

Lawmakers could change:

• Individual income-tax rates
• Corporate taxes
• Payroll taxes
• Capital-gains taxation
• Tax deductions
• Tax credits
• Estate-tax rules
• Tax treatment of certain investments

Even without increasing headline tax rates, changes to deductions, credits, exemptions, or thresholds could affect the amount individual households pay.

Social Security and Medicare Will Be Central to Future Spending Decisions

A significant portion of the long-term fiscal challenge comes from programs serving an aging population.

Social Security and Medicare are particularly important because the number of older Americans is increasing.

CBO projects that spending on Social Security and Medicare will continue growing over the next decade. The agency estimates that the number of Americans age 65 and older is expected to increase by approximately 15% over the coming decade.

As the population ages, more people become eligible for retirement and healthcare benefits.

At the same time, healthcare costs per beneficiary can increase.

This creates a difficult policy challenge: reducing spending on major programs can be politically difficult, while maintaining existing benefits can require significant federal resources.

Could Rising Debt Affect Social Security and Medicare?

Federal debt does not mean that Social Security or Medicare benefits automatically disappear.

However, long-term fiscal pressure can influence future policy decisions.

Lawmakers could eventually debate changes involving:

• Eligibility ages
• Payroll taxes
• Benefit formulas
• Income thresholds
• Medicare premiums
• Medicare payment policies
• Eligibility for certain benefits

These are political and legislative decisions, not automatic consequences of today’s debt.

For current beneficiaries, it is therefore important not to interpret debt projections as evidence that benefits will suddenly be eliminated.

Instead, the issue is about the sustainability and future financing of major federal programs.

Government Assistance Programs Could Face Greater Budget Pressure

Federal debt can also influence programs that directly affect lower- and middle-income households.

Government assistance can include programs related to:

• Food assistance
• Healthcare
• Housing
• Childcare
• Education
• Energy assistance
• Veterans’ benefits
• Disability programs

When interest costs consume more of the federal budget, lawmakers have fewer resources available for other priorities.

This does not necessarily mean that benefits will be cut.

Congress could choose to increase revenues, borrow more, or prioritize certain programs.

However, higher interest costs can make future budget negotiations more difficult.

Discretionary Spending Could Become More Constrained

Another area potentially affected by rising debt is discretionary spending.

This category includes many federal programs that Congress funds through annual appropriations, including portions of:

• National defense
• Transportation
• Education
• Scientific research
• Infrastructure
• Environmental programs
• Federal agencies

CBO projects discretionary spending to decline as a share of GDP over the next decade under current-law assumptions, while mandatory spending and net interest costs increase.

This could create greater competition for limited federal resources.

Businesses Could Also Feel the Effects

Federal debt is not only a government issue.

Businesses depend on access to affordable financing to invest in equipment, technology, buildings, hiring, and expansion.

If higher government borrowing contributes to higher market interest rates, companies may face greater financing costs.

That can influence decisions about:

• Hiring
• Capital investment
• Expansion
• New facilities
• Research and development
• Business loans
• Startup financing

CBO specifically notes that rising federal debt can increase borrowing costs and reduce private investment.

The effect would not necessarily be immediate or uniform across all industries.

Companies with strong cash positions may be less affected, while highly leveraged businesses could be more sensitive to financing costs.

What Does Government Debt Mean for Workers?

The relationship between government debt and employment is complicated.

Government spending can support economic activity, infrastructure, public services, and employment.

At the same time, persistently high deficits can eventually create economic costs if borrowing becomes excessive.

Higher interest rates can discourage some private investment, while tax increases could affect disposable income or business incentives.

Therefore, the impact on workers depends heavily on how policymakers respond to the debt problem.

Economic growth becomes especially important

A growing economy can make a large debt balance easier to manage because GDP and government revenues increase.

Stronger productivity, higher employment, and rising incomes can help improve the government’s fiscal position.

However, if economic growth slows while debt and interest costs continue increasing, the debt burden can become more difficult to manage.

Inflation Could Also Influence the Debt Outlook

Inflation has a complicated relationship with government debt.

Higher inflation can increase nominal tax revenues because wages, prices, and incomes rise.

However, inflation can also increase government spending and borrowing costs.

CBO estimates that persistently higher inflation and interest rates would increase federal interest costs significantly over time. In one sensitivity analysis, inflation and interest rates 0.1 percentage point higher each year would add hundreds of billions of dollars in interest costs over the 2027–2036 period.

For households, inflation also reduces purchasing power.

That means policymakers face a difficult balance between maintaining economic growth, controlling inflation, and managing federal borrowing.

Could the Federal Reserve Solve the Debt Problem?

The Federal Reserve and the federal government have different responsibilities.

Congress and the administration determine federal taxes and spending.

The Federal Reserve conducts monetary policy, including setting the federal funds rate.

The Fed does not simply set interest rates based on the government’s debt level.

As of September 8, 2026, the effective federal funds rate was 3.63%.

The Federal Reserve considers factors such as inflation, employment, economic growth, and financial conditions when making monetary policy decisions.

Therefore, Americans should not assume that the Fed will lower rates simply because federal interest costs are rising.

The Debt Could Limit Future Policy Flexibility

One of the most important long-term consequences of high federal debt may be reduced flexibility.

During a recession, natural disaster, military emergency, financial crisis, or other major event, the government may need to spend more money quickly.

If debt is already extremely high, borrowing additional funds could be more expensive or more difficult.

CBO warns that growing debt could constrain lawmakers’ ability to use tax and spending policies in response to unexpected events.

This is sometimes described as a reduction in fiscal space.

The government may still be able to borrow, but the cost and economic consequences of doing so could become more significant.

What Record Debt Could Mean for Future Generations

The effects of today’s borrowing can extend far beyond current taxpayers.

Future generations could inherit:

• Higher interest costs
• Higher taxes
• Lower government spending in some areas
• Greater pressure on entitlement programs
• Higher borrowing costs
• Reduced fiscal flexibility

However, future generations can also inherit assets created through government investment.

Borrowing to finance productive infrastructure, research, education, or other investments can have different economic consequences from borrowing primarily to finance ongoing consumption.

The composition of government spending therefore matters almost as much as the size of the deficit.

Three Possible Paths for the U.S. Fiscal Outlook

The future is not predetermined.

Scenario 1: Gradual Fiscal Adjustment

Lawmakers could gradually reduce deficits through a combination of spending reforms and additional revenues.

This could slow the growth of federal debt without requiring sudden changes.

Scenario 2: Continued High Deficits

The government could continue running large deficits.

In this scenario, debt would continue increasing, and interest costs could consume a larger share of federal resources.

This is broadly consistent with CBO’s current-law baseline projections.

Scenario 3: Stronger Economic Growth

Faster productivity and economic growth could improve the debt-to-GDP relationship.

Higher employment and incomes could also increase tax revenues.

However, stronger growth alone may not completely eliminate the fiscal challenge if spending and interest costs continue rising rapidly.

What Americans Should Watch in 2026

Several economic indicators can help Americans understand where the debt situation is heading.

1. Federal interest costs

If interest payments continue increasing rapidly, they could become an even larger budget concern.

2. Treasury yields

Higher long-term yields can increase the cost of government borrowing and influence private-sector borrowing rates.

3. Inflation

Persistent inflation can influence both interest rates and government spending.

4. Economic growth

Stronger GDP growth can make the debt burden easier to manage relative to the size of the economy.

5. Tax legislation

Changes to tax rates, deductions, credits, and other revenue policies could significantly alter future deficits.

6. Social Security and Medicare policy

Because these programs represent a major and growing share of federal spending, changes to their financing could have significant long-term effects.

7. Federal budget negotiations

Annual spending decisions can influence how quickly deficits and debt continue to grow.

What This Could Mean for American Households

Most Americans will not receive a bill labeled “national debt.”

Instead, the effects can appear indirectly.

Households may experience the consequences through:

• Mortgage rates
• Credit-card interest rates
• Auto loans
• Personal loans
• Investment returns
• Taxes
• Government benefits
• Inflation
• Job creation
• Public services

The timing is also important.

A household may not notice any immediate change simply because federal debt increases.

The larger concern is how debt accumulation interacts with interest rates, economic growth, inflation, and future government policy.

Final Thoughts

Record U.S. government debt is becoming an increasingly important issue for the country’s long-term economic outlook.

CBO projects that federal debt held by the public will rise from approximately 101% of GDP in 2026 to 120% in 2036 under current-law assumptions. Net interest costs are projected to increase from roughly $1 trillion in 2026 to $2.1 trillion in 2036.

Those numbers do not mean that Americans should expect an immediate tax increase, mortgage-rate surge, or reduction in government benefits.

Instead, they highlight a growing policy challenge.

As interest payments consume more federal resources, lawmakers may face increasingly difficult choices about taxes, Social Security, Medicare, healthcare, defense, infrastructure, education, and other government priorities.

For households, the most important point is that federal debt can influence everyday finances indirectly. Government borrowing can affect financial markets, interest rates, investment, taxation, and the amount of flexibility available for future government spending.

The direction of the U.S. economy will ultimately depend not only on how much the government owes, but also on economic growth, interest rates, inflation, tax policy, spending decisions, and how effectively policymakers manage the debt over time.