We’ve been talking about America’s enormous national debt.

The United States is approaching $40 trillion in gross federal debt.

We’ve talked about who owns that debt.

We’ve talked about whether America could ever pay it off.

We’ve talked about when government debt actually becomes dangerous.

But eventually we have to ask the question sitting in the middle of all of this:

What the heck are we spending all this money on?

Because the federal government doesn’t accumulate trillions of dollars of debt simply because somebody in Washington keeps ordering too much DoorDash.

The numbers involved are enormous.

For fiscal year 2026, the Congressional Budget Office projects the federal government will spend roughly $7.4 trillion while collecting only about $5.6 trillion in revenue.

That leaves a deficit approaching $2 trillion—in a single year.

Think about that.

We aren’t talking about the total national debt accumulated over generations.

We’re talking about the gap between federal spending and federal revenue for one year.

So where does more than $7 trillion actually go?

Let’s follow the money.

First: Where Does Washington Get Its Money?

Before we spend it, we have to collect it.

The federal government gets most of its revenue from taxes.

That includes:

Individual income taxes.

The taxes withheld from your paycheck or paid with your tax return represent the federal government’s largest revenue source.

Payroll taxes.

If you’ve looked at your paycheck and wondered where the FICA money went, you’re looking at taxes primarily financing Social Security and Medicare.

Corporate income taxes.

Businesses pay federal corporate income taxes.

Other revenue.

The federal government also collects money from excise taxes, customs duties, estate and gift taxes, fees and other sources.

Altogether, CBO projects approximately $5.6 trillion in federal revenue for fiscal 2026.

Sounds like plenty of money.

There’s just one little problem.

We’re spending around $7.4 trillion.

That’s like earning $100,000 and spending roughly $132,000.

Except instead of putting the difference on a Visa card, the United States Treasury issues debt.

And we’ve been doing versions of this year after year.

That’s how deficits become debt.

So Where Does the $7.4 Trillion Go?

This is where political arguments frequently become disconnected from arithmetic.

Ask someone what Washington wastes money on and you’ll hear:

Foreign aid.

Politicians’ salaries.

Government employees.

Ridiculous research projects.

Congressional perks.

Some program they saw on social media.

There absolutely can be waste, fraud, duplication and programs worth debating.

But if you’re trying to understand why federal spending is measured in trillions, you need to look at the really big categories.

And the really big categories are programs most Americans have heard of.

Let’s start with the giant.

Social Security

Social Security is one of the largest federal programs.

CBO projects Social Security outlays of roughly $1.6 trillion in 2026.

That’s approximately:

$1,600,000,000,000.

In one year.

Where does it go?

Primarily to retirement, survivors and disability benefits.

Millions of Americans receive Social Security payments every month.

For many retirees, Social Security isn’t some optional government bonus.

It’s a major part of household income.

Which explains why politicians discover very quickly that:

“Let’s dramatically cut Social Security!”

is much easier to say in a spreadsheet than to explain to voters receiving the checks.

Medicare

Next comes another giant:

Medicare.

Medicare provides health coverage primarily to Americans age 65 and older, along with certain younger people with disabilities and other qualifying conditions.

Federal Medicare spending is measured in the neighborhood of $1 trillion annually, depending on whether you’re discussing gross program spending or net federal outlays after premiums and other receipts.

And the cost is expected to grow as America’s population ages and healthcare expenses rise.

This is one of the fundamental problems facing the federal budget.

Americans are living longer.

More people are reaching retirement age.

Healthcare is expensive.

And we’ve made substantial promises involving retirement and medical benefits.

Those promises cost money.

A lot of money.

Medicaid and Other Health Programs

Medicare isn’t the government’s only healthcare expense.

There is also:

Medicaid.

Children’s Health Insurance Program.

Affordable Care Act subsidies.

Veterans’ healthcare.

Public-health programs.

And numerous other health-related expenditures.

Federal Medicaid spending alone runs into hundreds of billions of dollars annually.

Once you combine Medicare, Medicaid and other major health programs, healthcare becomes one of the dominant pieces of the federal budget.

Which means any serious discussion about America’s long-term fiscal situation eventually runs into healthcare.

You can argue about what should change.

But you can’t pretend the category doesn’t exist.

National Defense

Now we get to the category many people assume consumes most of the federal budget.

Defense is enormous.

The United States spends hundreds of billions of dollars every year on national defense.

That includes:

• Military personnel
• Weapons systems
• Aircraft
• Ships
• Missiles
• Military bases
• Operations
• Research
• Cybersecurity
• Procurement
• Nuclear capabilities
• Defense contractors
• Military readiness

Depending on precisely what is included, federal defense spending is approaching the neighborhood of $1 trillion annually.

That’s a staggering amount of money.

But here’s the surprising part:

Defense isn’t the entire federal budget.

Not even close.

If you eliminated the Pentagon tomorrow—which obviously isn’t a realistic proposal—you still wouldn’t magically solve America’s entire long-term fiscal problem.

That’s how large the rest of the federal government has become.

Interest on the National Debt

Now we reach the category that should make everyone pay attention.

Remember the nearly $40 trillion in debt we’ve been discussing?

Borrowing money costs money.

Treasury has to pay interest to the people and institutions holding Treasury securities.

CBO projects net interest costs of around $1 trillion in fiscal 2026.

Think about that for a moment.

Approximately:

$1 TRILLION.

Interest.

Not Social Security benefits.

Not healthcare.

Not military equipment.

Not bridges.

Not schools.

Not cancer research.

Not border security.

Not federal courts.

Interest on previously accumulated borrowing.

And unlike many government programs, you can’t simply announce:

“We’re cutting interest payments by 30% next year.”

Treasury has legal obligations to its bondholders.

Defaulting on government debt would create an entirely different and potentially catastrophic financial problem.

That’s why growing interest expense is such an important part of the national-debt discussion.

Social Security + Healthcare + Defense + Interest

Now look at what we’ve already covered.

Social Security.

Medicare.

Medicaid and health programs.

Defense.

Interest.

We haven’t discussed thousands of federal programs yet.

And already we’ve accounted for a huge portion of federal spending.

This is the fundamental fact that gets lost in political arguments.

The federal budget is dominated by several enormous categories.

That makes balancing it much harder than simply identifying a handful of silly-sounding programs.

What About Welfare?

“Welfare” is one of those words that gets used to describe almost everything people don’t like about government spending.

But there isn’t one giant federal line item labeled:

WELFARE — $2 TRILLION.

Federal assistance programs include many different things.

SNAP food assistance.

Temporary Assistance for Needy Families.

Supplemental Security Income.

Housing programs.

Tax credits.

Healthcare programs.

Unemployment-related programs.

Nutrition assistance.

Disability benefits.

And others.

Some are relatively small.

Others are substantial.

Some primarily benefit children.

Some benefit elderly Americans.

Some benefit people with disabilities.

Some benefit low-income workers.

If you’re going to debate these programs, debate them.

But lumping everything into the word “welfare” doesn’t tell you much about the actual federal budget.

Veterans

The federal government also spends substantial amounts caring for people who served in the military.

That includes:

• Disability compensation
• Healthcare
• Pensions
• Education benefits
• Housing assistance
• Other veterans’ programs

Veterans’ benefits and services represent hundreds of billions of dollars in federal spending.

This is another example of why cutting government spending gets politically difficult.

“Cut government spending” polls very differently from:

“Reduce benefits for disabled veterans.”

Once government spending has a name and a beneficiary, budget cuts become much harder.

Transportation and Infrastructure

Surely this must be where trillions disappear, right?

Roads.

Bridges.

Airports.

Rail.

Public transportation.

Infrastructure.

These things absolutely cost money.

The federal government spends billions supporting transportation and infrastructure.

But compared with Social Security, major healthcare programs and the overall federal budget, transportation isn’t the primary explanation for trillion-dollar annual deficits.

This surprises people because physical infrastructure is one of the most visible things government buys.

You can see a bridge.

You can’t see 70 million Social Security checks as one giant object.

Education

Another popular misconception:

“Most of my federal taxes must go to schools.”

Education spending is significant, but elementary and secondary public education in America is heavily financed at the state and local levels.

Your local school district isn’t primarily operating on a giant check from Washington.

The federal government does spend money on education through programs involving disadvantaged students, special education, student aid, higher education and other initiatives.

But federal education spending is not remotely the largest category in the federal budget.

Federal Employees

Here’s another favorite:

“Just cut the federal workforce.”

The federal government employs a lot of people.

Their compensation costs money.

Could staffing levels and agency efficiency be debated?

Absolutely.

But there’s an important distinction:

Government employees administer programs. They aren’t necessarily where most program dollars ultimately go.

The Social Security Administration has employees.

But most Social Security spending doesn’t go to Social Security Administration employees.

It goes to beneficiaries.

Medicare requires administration.

But most Medicare money doesn’t go to bureaucrats sitting behind desks.

It finances healthcare benefits.

Eliminating administrative costs entirely—which obviously isn’t possible—wouldn’t eliminate the underlying benefit obligations.

This distinction matters.

What About Foreign Aid?

Here comes perhaps the biggest misconception of all.

Ask Americans how much of the federal budget goes to foreign aid and surveys have historically found that people dramatically overestimate it.

Foreign assistance makes up only a small percentage of overall federal spending.

Depending on what programs and definitions you’re using, it generally represents roughly 1% or less of the federal budget.

That’s not zero.

Billions of dollars are still real money.

And people are perfectly entitled to debate whether particular foreign-aid programs are worthwhile.

But mathematically:

Eliminating every dollar of foreign aid would not balance a nearly $2 trillion annual federal deficit.

Not remotely.

You could eliminate foreign aid completely and still have an enormous deficit.

This is why understanding scale matters.

What About Congress’s Salaries?

Let’s do another popular one.

Members of Congress earn salaries.

There are 535 voting members between the House and Senate.

Suppose, purely as an illustration, every one of them earned around $174,000.

That’s roughly:

$93 million.

Sounds like a lot.

Until you compare it with a federal budget exceeding:

$7 trillion.

You could eliminate congressional salaries entirely.

Make every member of Congress work for free.

And from the perspective of a $7 trillion federal budget, you’d barely notice.

You can certainly argue politicians are overpaid.

You just can’t seriously argue their salaries explain the national debt.

The Difference Between Mandatory and Discretionary Spending

Now we need one piece of government-budget jargon.

Federal spending is often divided into:

Mandatory spending

and

Discretionary spending.

Don’t let the names confuse you.

Mandatory spending generally means spending governed by existing laws establishing eligibility and benefits.

Programs such as Social Security and Medicare largely fall into this category.

If 70 million people qualify for Social Security under existing law, Congress doesn’t simply decide each year:

“This year we’re only paying 50 million of you.”

The underlying law determines the obligation.

Discretionary spending is generally funded through annual appropriations.

This includes much of:

• Defense
• Education
• Transportation
• Scientific research
• Federal law enforcement
• Many government agencies
• Numerous domestic programs

Why does this distinction matter?

Because politicians often promise to:

“Cut discretionary spending!”

But mandatory programs represent a huge share of the budget.

If you’re trying to fix a structural fiscal imbalance over decades while declaring most major entitlement programs untouchable, the remaining math gets much harder.

Here’s the Federal Budget in Normal-Person Terms

Imagine a family has a budget like this:

Income

$100,000.

Spending

$132,000.

Now suppose most of their spending consists of:

Retirement obligations: $28,000

Healthcare: $25,000

Defense/security: $13,000

Interest on old debt: $17,000

Everything else: $49,000

I’m simplifying enormously, but the point is what matters.

The family has a:

$32,000 deficit.

Then someone announces:

“I found $400 of waste! Problem solved!”

No.

You should absolutely eliminate the wasted $400.

But you still have a $31,600 problem.

Scale matters.

Why Can’t We Just Freeze Spending?

This sounds attractive.

No more spending increases.

But even that becomes complicated.

Social Security benefits are affected by cost-of-living adjustments.

Healthcare costs change.

The population ages.

Interest rates change.

The number of beneficiaries changes.

Military needs change.

Economic crises happen.

Natural disasters happen.

Wars happen.

Recessions happen.

The federal budget isn’t a Netflix subscription you can simply freeze at today’s price forever.

And some expenses grow automatically under existing law.

Why Does an Aging Population Matter So Much?

This is one of the most important long-term issues.

Picture America decades ago.

There were many workers paying payroll taxes relative to the number of retirees receiving benefits.

Now the population is aging.

People are living longer.

Large generations are moving into retirement.

That means:

More Social Security beneficiaries.

More Medicare beneficiaries.

More years of benefits.

More healthcare expenses.

Meanwhile, the number of workers supporting those programs doesn’t necessarily grow at the same rate.

That’s a demographic problem, not merely a political one.

And demographics are stubborn.

Congress can’t pass a law making everyone 35 again.

What Happens When Social Security Collects Less Than It Pays?

Social Security has trust funds holding special Treasury securities.

As program costs exceed dedicated income, those reserves can be drawn down to help pay scheduled benefits.

But trust funds aren’t magical money machines.

The Social Security trustees project that, absent legislative changes, reserves will eventually be depleted, after which incoming dedicated revenue would cover only a portion of scheduled benefits.

That doesn’t mean:

“Social Security disappears.”

Payroll taxes would still be collected.

But it does mean Congress eventually faces choices involving some combination of:

Higher revenue.

Lower scheduled benefits.

Changes to eligibility.

Changes to retirement ages.

Other reforms.

Or transfers financed elsewhere in the federal budget.

There is no magic option called:

Do nothing forever and everything works perfectly.

So Why Don’t Politicians Fix It?

Because every solution makes somebody angry.

Want to reduce Social Security spending?

Retirees and future retirees care.

Want to reduce Medicare spending?

Seniors and healthcare providers care.

Want to cut defense?

Military communities, defense advocates and contractors care.

Want to raise taxes?

Taxpayers care.

Want to cut Medicaid?

States, hospitals and beneficiaries care.

Want to cut veterans’ programs?

Good luck.

Want to reduce federal employees?

Agencies, workers and communities care.

Want to reduce infrastructure?

Everyone still wants their bridge fixed.

The federal budget isn’t an abstract spreadsheet.

Every dollar goes somewhere.

And somewhere there is usually a person, company, hospital, retiree, government, employee or organization that depends upon it.

Why Not Just Tax Billionaires?

This deserves its own article.

But here’s the short answer:

Tax policy affecting very wealthy Americans could certainly raise additional revenue.

How much depends enormously on what tax is imposed, how it’s structured, behavioral responses, enforcement and economic effects.

But America’s long-term fiscal imbalance is so large that serious proposals generally require looking beyond one tiny group of taxpayers if the goal is to permanently close multi-trillion-dollar gaps.

That doesn’t tell us whether taxes on wealthy households should be higher or lower.

That’s a political and policy debate.

It tells us something simpler:

Trillion-dollar problems require trillion-dollar arithmetic.

Why Not Just Cut Waste, Fraud and Abuse?

Same answer.

Do it.

Seriously.

If the government is spending $10 billion unnecessarily, stop.

If fraud is occurring, prosecute it.

If two agencies perform the same function unnecessarily, consolidate them.

If a program doesn’t work, reconsider it.

But don’t confuse:

“Government waste exists.”

with:

“Eliminating obvious waste automatically solves the entire deficit.”

Those are different propositions.

If the deficit approaches $2 trillion annually, you’d need extraordinary savings to balance the budget exclusively through waste reduction.

Here’s the Part Nobody Likes

If America seriously wants to address its long-term fiscal imbalance, the debate probably can’t permanently exclude every politically difficult category.

That means eventually talking about some combination of:

Taxes.

Social Security.

Medicare and healthcare costs.

Other mandatory programs.

Defense.

Discretionary spending.

Economic growth.

And:

Interest on the debt.

Different people will reach dramatically different conclusions about the right combination.

That’s democracy.

But arithmetic doesn’t care whether you’re a Republican, Democrat, independent or someone who refuses to discuss politics at Thanksgiving.

$7.4 trillion minus $5.6 trillion still leaves roughly:

$1.8 trillion.

You can argue about the solution.

You can’t vote the subtraction away.

What Happens to the Missing $1.8 Trillion?

We borrow it.

Treasury issues more securities.

Investors buy them.

The national debt increases.

And then, potentially:

We pay interest on that additional debt.

Which becomes another federal expense.

Which can contribute to future deficits.

Which may require additional borrowing.

That’s the cycle we’ve been discussing throughout this series.

This Is Why Interest Is the Scariest Category

Social Security provides retirement and disability benefits.

Medicare provides healthcare.

Defense provides national security.

Transportation buys infrastructure.

Federal agencies provide services.

Whether you think those programs should be larger or smaller, they’re purchasing something society has chosen to provide.

Interest is different.

Interest is the cost of financing previous borrowing.

And CBO projects net interest costs will rise substantially over the coming decade as debt grows.

The more money required for interest, the less fiscal room policymakers have for everything else unless taxes rise or borrowing increases.

It’s essentially the federal government’s version of discovering your minimum credit-card payments are swallowing your paycheck.

So Where Does All the Money Actually Go?

Here’s the simplest answer.

Most federal money doesn’t disappear into a mysterious Washington black hole.

A huge portion goes toward several very recognizable things:

Retirement.

Social Security.

Healthcare.

Medicare, Medicaid and other health programs.

National defense.

Military personnel, operations, weapons and security.

Interest.

Payments associated with the government’s accumulated debt.

Income security and other benefits.

Programs assisting various populations.

Veterans.

Healthcare, disability and other benefits.

Everything else.

Transportation.

Education.

Science.

Law enforcement.

Courts.

Agriculture.

Foreign affairs.

Environmental programs.

Federal agencies.

And thousands of other governmental functions.

The surprising lesson isn’t:

“I discovered the secret program consuming all our money!”

It’s almost the opposite.

There Isn’t One Secret Program.

America’s fiscal problem is difficult precisely because the biggest categories are not obscure.

They’re programs millions of Americans know, use and often strongly support.

And that’s why:

“Just cut spending.”

isn’t actually a complete budget proposal.

Neither is:

“Just raise taxes.”

Neither is:

“Just tax billionaires.”

Neither is:

“Just cut foreign aid.”

Neither is:

“Just eliminate waste.”

Each might be part of someone’s preferred solution.

But eventually you have to put numbers next to the proposal.

The Question Everyone Should Ask

The next time a politician says:

“I’m going to balance the budget by cutting government spending,”

ask:

Which spending?

How much?

Social Security?

Medicare?

Defense?

Medicaid?

Veterans?

Federal employees?

Something else?

And if they say:

“None of those. Just waste.”

ask:

How many dollars of waste have you identified?

Because balancing a deficit approaching $2 trillion requires approximately $2 trillion of actual changes.

Likewise, if someone says:

“We’ll solve it by taxing the rich,”

ask:

How much revenue will the proposal actually raise?

Not:

Does it sound fair?

Not:

Do I like rich people?

Not:

Which political party proposed it?

How much money?

That’s how you turn political slogans into arithmetic.

The Federal Budget for Idiots

Here’s everything you need to remember.

The federal government collects roughly:

$5.6 trillion.

It is projected to spend roughly:

$7.4 trillion.

The difference is roughly:

$1.8–$1.9 trillion.

We borrow the difference.

That borrowing adds to the national debt.

The national debt requires interest payments.

Those interest payments become federal spending.

And unless revenue rises or other spending falls enough to compensate, some of those interest costs contribute to future deficits.

That’s the cycle.

And This Is Why the $40 Trillion Debt Didn’t Appear Overnight

There wasn’t one president who bought a $40 trillion aircraft carrier.

There wasn’t one Congress that accidentally left the government’s credit card at a casino.

The debt accumulated over many years through:

Deficits.

Recessions.

Wars.

Tax policies.

Spending policies.

Pandemics.

Economic emergencies.

Entitlement commitments.

Interest.

And countless decisions made by elected officials of both political parties over decades.

That’s important because it means there probably isn’t one magical decision that makes the problem disappear either.

What Does This Mean to Me?

The federal budget may seem impossibly distant from your family’s finances.

It isn’t.

Those trillions eventually touch:

Your paycheck through taxes.

Your retirement through Social Security.

Your healthcare through Medicare and Medicaid.

Your investments through Treasury and financial markets.

Your mortgage through broader interest-rate conditions.

Your community through federal programs and grants.

Your children through the debt and obligations future taxpayers inherit.

Understanding where Washington spends money doesn’t tell you which programs should be cut or which taxes should increase.

Those are policy choices.

But it does something arguably more useful.

It makes it much harder to be fooled by slogans.

Because once you understand the scale of the federal budget, you know the question to ask every time somebody announces they’ve discovered an easy solution to America’s debt:

“Okay. Show me the math.”

And that’s exactly what we’re going to do next.

Because two of the most common solutions to America’s debt problem are:

“Just tax the billionaires.”

and

“Just cut government waste.”

Could either one actually balance the federal budget?

Let’s run the numbers.

This article is for general educational purposes only and does not constitute financial, investment, tax, economic or legal advice.