The US Government Now Spends More on Interest Than on Its Military

A Line Item Nobody Used to Notice

For most of my life and probably most of yours the interest the government paid on its debt was background noise. No one read that line in the budget. It was small enough to ignore buried beneath defense Medicare and everything else that really made headlines. That's no longer true. In fiscal year 2026 net interest payments on the national debt are on track to top $1 trillion a year or about $88.billion dollars a month. Read that again slowly. The federal government is now spending more on servicing the debt it already owes than it spends on the entire military on every ship on every base on every soldier's paycheck combined. Interest has quietly become the second largest line item in the federal budget second only to Social Security. I didn't expect a line item to surpass defense spending in my lifetime and I suspect most people haven't realized thatit happened

How We Got Here: Deficits and the Rate Shock

The debt behind that interest bill has surpassed $38 trillion a figure so large that it stops meaning anything the moment you say it out loud. It didn't come overnight. It accumulated over decades in which the government spent more than it collected in taxes year after year and the deficit the deficit was covered by issuing more debt. Added to this were wars. Added to this were tax cuts. Added to this were tax cuts.Recessions add up because tax revenues fall exactly when spending on unemployment and safety-net programs rises. Then came the response to the pandemic a huge one-time surge in borrowing that added to everything that already existed. Debt is almost never paid off in any real sense. Each year's deficit simply adds to the previous year's deficit and the deficit has been growing for a long time

But a large amount of debt alone is not what caused interest to exceed $1 trillion. Two things had to happen together. The debt had to grow and the interest rate had to rise. In the years after the 2008 financial crisis the government could borrow at rates close to zero.ten times the bill. When inflation forced interest rates to rise dramatically all that cheap debt didn't sit there and cost what it always cost. It had to be refinanced and refinanced debt is priced at the rate the market charges today not the rate it had when it was first issued a decade or two earlier

The Mechanism: How a Coupon Reset Actually Works

Here's the mechanics behind all of this and it's worth looking at it slowly because most coverage leaves it out. Every bond the government sells has a fixed interest rate called the interest rate. coupon locked on the day it is issued. A bond sold years ago at 2 percent continues to pay 2 percent until it matures no matter what happens to intermediate rates. The government's overall interest bill in a given year is not a rate applied to all debt. It is a weighted average the combined result of thousands of individual bonds bills and notes each with the exchange rate in effect on the day of its sale. When market rates rise the government's interest bill does not jump with them.immediate. It increases gradually as older cheaper debt matures and is replaced by new debt priced at the new higher rate. This is sometimes called coupon averaging reset and is why it takes years for a rate shock to fully show up in the budget rather than hitting it all at once

Let me make this concrete with round numbers that are not the actual Treasury figures but just numbers chosen to make the arithmetic clean and verifiable. Suppose a government has $20 trillion in debt all of it currently locked in at an average rate of 2 percent. That costs $400 billion a year in interest: 20 trillion times 0.02. Now suppose that one-tenth of that debt $2 trilliondollars it matures every year and has to be refinanced and now new debt is sold at 5 percent instead of 2 percent because rates went up. Let's watch what happens to the average coupon of all stocks as the old debt is paid off year after year even if the government never borrows a single additional dollar beyond what is renewed

Check the first row of the year at hand. 18 trillion at 2 percent is 360 billion. 2 trillion at 5 percent is 100 billion. If we add them up the interest bill is 460 billion up from 400 billion an increase of 60 billion dollars and the size of the debt has not changed at all. By the tenth year once each dollar has been refinanced the entire stock is placed at the new rate of the5 percent and the interest bill has risen from 400 billion to 1 trillion an increase of one hundred and fifty percent again with the debt itself unchanged in size. That is what a rate shock does on its own stripped of any growth in debt. In the real world debt also grows every year which partly explains why the actual jump in the interest bill has been faster and larger than this simplified table shows. Both effects are shown.real government debt is also spread over many maturities from bills that mature in weeks to bonds that mature in thirty years so reset occurs continuously rather than in the neat annual chunks that this table uses to keep the math simple. The more debt you have with short maturities the faster the average coupon will approach whatever rate the market is charging today

Debt to GDP Is Not Interest to Revenue

People often turn to one number debt as a proportion of GDP gross domestic product the total size of the economy as a single indicator of a government's problems.It's a useful number but it answers a different question than the one arising in this year's budget fight. Debt to GDP asks whether the volume of debt is large relative to the economy that ultimately has to support it which is important in the long run because a growing economy makes any fixed amount of debt easier to bear in the same way that a rising salary makes a fixed mortgage payment easier to bear over time. Interest on income the proportion of the government's actual tax revenue consumed by interest payments raises a different more immediate question. It asks how much room is left in this year's checkbook after interest is paid before a single dollar goes to defense education or anything else Congress actually votes on

The two numbers can move in opposite directions and that's the point of separating them. A government can have a huge debt-to-GDP ratio and still have a manageable interest-to-revenue ratio if the rate it pays on that debt is low enough. A government with a much lower debt-to-GDP ratio can suddenly find that interest consumes an ever-larger share of revenue if rates rise fast enough which is exactly the coupon reset mechanism from the previous section. In recent years the United States has been experiencinglargely the second story: a debt volume that grew steadily but an interest bill that skyrocketed primarily because the rate reset much higher not because the volume itself tripled. Knowing which story you're in is important because the solution for each one is different. In theory a debt-to-GDP problem is primarily addressed by growing the economy faster or reducing future deficits. An interest-income problem if rates stay high continues to get worse each year the debt rises.renews regardless of what happens with growth

What Actually Constrains a Sovereign Borrower

This is the part I found genuinely contradictory when I first studied it. A government that borrows in its own currency as the United States does cannot be forced into a default that bankrupts a business or household. It can always create the currency needed to make a nominal payment denominated in dollars. It seems like that should mean that the debt doesn't matter at all. It's not that simple so it's worth being precise about what the actual restriction is

The limitation is not solvency in the strict sense. It is inflation and it is the price the market demands to continue lending. If a government relies on its central bank to buy its debt directly rather than borrowing it from savers and investors at a market rate and does so on a scale that exceeds what the real economy can absorb the result manifests itself as inflation currency depreciation or both not a late payment. Lenders are also not required to continue lending at low rates forever. If they startTo doubt a government's ability or willingness to manage its deficits they demand a higher rate to offset that doubt. That's roughly the mechanism that sharply raised borrowing costs for several heavily indebted European governments during the eurozone debt crisis of 2010 to 2012 countries that in particular had given up their own currency and couldn't simply create euros on their own. The United States hasn't faced anything like that kind of market revolt in part becauseDollar-denominated Treasury debt remains close to the world's benchmark risk-free asset and global investors continue to buy it even at rates that seem unattractive because there are few alternatives of comparable size and depth. That status is valuable and not permanent by law. It is based on trust and trust is the kind of thing that erodes slowly over years and then occasionally quickly

Case Study: Japan's Long Run at the Edge

The clearest real-world example of the gap between debt/GDP and interest/income is Japan which has spent more than three decades running the experiment that the rest of the world only cares about in theory. Japan's public debt relative to the size of its economy is commonly cited as the highest of any major economy generally sitting somewhere above twice its annual GDP a ratio that would be treated as an emergency almost anywhere else. And yet Japan has not faced a debt crisis. Nohas seen its interest bill skyrocket. For most of the last thirty years Japan borrowed at near-zero and sometimes sub-zero interest rates despite carrying that enormous debt burden

The mechanism behind that result relates directly to the previous two sections. First most of Japan's public debt is held by banks pension funds insurers and the Bank of Japan itself rather than foreign investors who could demand a risk premium or dump bonds to a bad holder. A country that primarily owes money to its own citizens and institutions is in a structurally different position than one that depends on convincing third parties to continue lending. Second Japan has maintained a savings ratepersistently high domestic rate which gave its financial system a large number of buyers willing to buy government bonds without needing to offer a high rate to attract them. Third and this relates directly to the mathematics of the coupon reset as long as the rate on new and refinanced Japanese debt remained near zero the interest-to-income ratio remained low no matter how large the debt-to-GDP ratio was because the interest bill is the rate multiplied by the debt and one of those two figures was fixed near zero.for decades

That story has begun to change and it's worth being honest about the change rather than treating Japan as proof that the model never breaks. In recent years the Bank of Japan has raised rates from near zero for the first time in a generation in response to inflation that finally appeared after decades of absence. Japanese government bond yields have risen with it. That's the coupon reset mechanism coming to Japan in real time the same mechanism in the example above and it's now a live question how much of the billJapan's interest rate rises as its own debt is transferred to a world with higher rates. Japan spent thirty years demonstrating that a very high debt-to-GDP ratio can coexist with a low interest-to-income ratio as long as rates stay low. Now it can spend the next decade demonstrating what happens to that same volume of debt once rates don't

Why It Matters for Everyone

Step away from the mechanics and ask why any of this should matter to someone who doesn't follow the bond markets. A dollar spent on interest is a dollar that can't be spent on anything else. Not roads. Not research. Not defense. Not tax cuts not new programs. As interest crowds out a larger portion of the budget the government has less room to respond to a recession or genuine crisis when it hits and pressure mounts to raise taxes or cut spending elsewhere a struggle that affects everyone.parts of the political spectrum because everyone's favorite program is competing for the same ever-decreasing amount of excess space

There is a second channel that goes beyond the federal budget itself. Excessive government borrowing competes with every other player in the economy for the same pool of loanable savings and when the government issues huge amounts of debt it can drive up interest rates throughout the economy not just on Treasury bonds. Mortgages become more expensive. Auto loans become more expensive. A small business that borrows to expand also pays a higher rate. None of these borrowers did anything different.The government competing more intensely for the same money is enough by itself to change the price everyone else pays for credit

Where This Breaks

I've laid out the mechanism as if it were a slow-motion inevitability: debt grows rates reset interest crowds out the budget I repeat. The other side is worth honestly discussing because the fatalistic version of this story exaggerates how mechanical it really is

The first counterpoint is growth. If the economy grows faster than the interest rate on debt the debt-to-GDP ratio can fall even as the dollar amount of debt continues to rise because the denominator grows faster than the numerator. The United States achieved something like this in the late 1990s when strong economic growth restrained spending growth and a technology boom that raised tax revenues turned persistent deficits into a series of budget surpluses in the end.of the decade a result that seemed politically impossible just a few years earlier. Growth does not solve everything and cannot be invoked according to demand but it is a real lever not theoretical and in fact it has been used before

The second counterpoint is that the debt spiral described above is a trend not a law of physics. Rates are assumed to stay high and incomes do not adjust and both assumptions can fail. Rates move with inflation expectations and central bank policy and have fallen significantly after past inflationary periods once inflation itself cooled. If rates fall even partially over the next decade long-term projections that mechanically assume something close tocurrent rates would seem too pessimistic in retrospect just as many debt forecasts over the last decade turned out to be wrong in both directions

The third counterpoint is the one I find most difficult to dismiss and it is the one that Japan's recent experience highlights. The reassurance that a country that borrows in its own currency and is at the center of the global financial system is safe from the sharpest aspects of this problem is a real advantage not just a talking point but it is also not a permanent law. It depends on whether the world continues to want to maintain that currency and that debt at a reasonable rate. If that confidence is eroded for reasons that have nothing to do withthe math of interest itself a foreign policy shock the emergence of a genuine alternative reserve currency a political crisis over debt repayment the squeeze tightens faster than any mechanical projection would suggest. I don't think that's the most likely outcome in the coming years. I also don't think it's a risk worth ruling out completely

Where It Goes From Here

None of the above counterarguments erase the path the government is currently on. They simply describe the conditions under which it could fold. As things stand the Congressional Budget Office projects that net interest will rise from about $1 trillion in 2026 to about $2 trillion in 2036 totaling more than $16 trillion over the decade if current laws hold. That's not the worst-case scenario. That's the basic political path.and current

None of this means that a crisis is around the corner. The United States borrows in its own currency and is still at the center of the global financial system an advantage described a few sections back and that advantage is real today even if it will not be permanent by default. But a trend that cannot continue forever eventually stops continuing. Closing the gap between what the government spends and what it collects requires a combination of slower spending growth higher taxes and faster economic growth and each item on that short list ispolitically painful in its own way which is exactly why the gap has remained open for so long

How I Actually Think About This

Here's my actual read clearly labeled as a read rather than a forecast. I don't think the interest bill topping $1 trillion means the sky is going to fall next year and I'm skeptical of anyone who claims to know exactly when a sluggish fiscal trend turns into an acute crisis because historically that turn has been nearly impossible to time in advance. What I do believe is that this issue changes the way I read almost every other economic and political story I come across

When I see a proposal for a new spending program or a new tax cut the first question I ask is not whether it's a good idea in and of itself. That's where the money comes from since interest is already eating up a larger portion of the budget each year on autopilot without Congress voting for it. When I watch the Fed debate over whether to cut rates I now think of the coupon reset mechanism we saw earlier in this article because every quarter point the Fed keeps rates higher is shown with adelay such as a higher federal interest bill as the debt rolls over. This is a genuine somewhat uncomfortable channel between monetary policy and the government's own budget. And when I read confident predictions about a looming debt crisis in the United States I now compare them to Japan's thirty-year streak of high debt-to-GDP debt without a crisis while taking seriously that Japan's own history is changing beneath our feet as its rates rise. My honest position is that I find this really difficult to model.accurately and I would trust an analyst who admits it over one who gives you a sure date

The Bottom Line

The federal government now spends more on interest than on its entire military and that single fact is the headline. The underlying mechanism is less dramatic and more useful to understand: a huge amount of debt faced a sharp rise in interest rates and as old cheap debt matures and is refinanced the average rate on all debt rises toward what the market is charging today. Debt relative to GDP and interest relative to income are different issues that can point in different directions; borrowing in your own currency is onereal advantage rather than a free pass and Japan's decades of experience show how durable that advantage can be and how it can begin to weaken once rates move. Debt is no longer an abstraction. It's the second-largest check the government writes each year and it will quietly shape the budget fights fiscal debates and interest rate decisions that will define the next decade whether or not most people read that budget line