Your Tax Dollars Now Pay More Interest Than the Military. And That Bill Is Getting Bigger Fast

Think of the federal budget as a household ledger. You have been told for decades that your money funds Social Security checks for your parents, Medicare for the retired, and the military that keeps the lights on. Read the 2025 ledger again, because one line has silently moved to the top of the list. In fiscal 2025, net interest — the federal government's payments on the money it has already borrowed — topped $1 trillion for the first time, roughly $150 billion more than what Washington spent on the entire defense budget. Interest is now the third-largest thing the government does, behind only Social Security and Medicare. This is not a bookkeeping footnote. It is a claim on your paycheck that arrives before any program gets a dollar.

The bill doubles faster than anyone planned for

Watch the size of that bill move, because it is the fastest-growing thing in the budget. Net interest hit an all-time high of $476 billion in fiscal 2022. By fiscal 2025 it had more than doubled to about $970 billion. Fiscal 2026 is already tracking around $1 trillion. And the Congressional Budget Office projects that figure roughly doubling again, to about $2.1 trillion, by fiscal 2036.

Federal net interest cost by fiscal yearAnnual net interest on the national debt, USD billions, with CBO projection

Net interest more than doubled from $476B in FY2022 to $970B in FY2025, crossing above defense spending by roughly $150B to become the third-largest federal outlay, and CBO projects it roughly doubling again to $2.1T by FY2036.

Fiscal year	Net interest cost ($)
FY2022	476
FY2025	970
FY2026	1000
FY2036 (CBO projection)	2100

Put that in terms you can hold onto: roughly one dollar of debt service for every four dollars Washington takes in. The service on past borrowing is becoming a permanent, growing slice of every revenue dollar before anything else gets decided.

Why it moves this fast: the debt matures on your watch

Here is the mechanism that makes this feel like a countdown rather than a slow drift. The government does not borrow once; it rolls over. As of mid-2025, 61 percent of outstanding Treasury debt held by the public was scheduled to mature by the end of 2028. Old debt issued at low rates comes due, and Washington refinances it at today's elevated yields. That is the pass-through: the elevated rates the market demands today do not stay in the future — they walk straight into next year's interest payments, because most of the debt is rolling over within a few years. The burden is also growing as a share of the economy and of revenue. Net interest already consumed about 3.2 percent of GDP and 18.5 percent of every federal revenue dollar in fiscal 2025. The projections point to roughly 4.6 percent of GDP and 25.8 percent of revenue by 2036.

Net interest as a share of GDP and of federal revenuePercent of GDP and of federal revenue; FY2036 values are CBO projections, not observed

Debt service is projected to climb from 3.2% of GDP and 18.5% of revenue in FY2025 to 4.6% of GDP and 25.8% of revenue by FY2036, so over a quarter of every federal revenue dollar would go to interest.

Fiscal year	Share of GDP	Share of federal revenue
FY2025	3.2	18.5
FY2036 (projection)	4.6	25.8

That last number deserves a moment. By 2036, the government is on track to spend more than one of every four dollars it collects just to service its own debt — before a single dollar goes to a program, a soldier, or a retiree.

The loop that keeps feeding itself

This is where a one-time spike turns into a self-reinforcing spiral. The structural deficit keeps forcing more Treasury issuance. New borrowing, refinanced at today's rates, raises the debt-service bill. A rising interest bill consumes a growing share of revenue, which leaves less room for defense, discretionary programs, and future benefits like Social Security and Medicare — and that tension feeds expectations of still more borrowing to cover the gap. High interest costs do not just coexist with deficits; they push the deficits that push interest costs.

Be clear-eyed about what is proven here versus what is projected. No line-item cutback has actually happened yet; the crowding-out is a trajectory, not a realized collapse, and the defense-versus-interest comparison could flip if deficits narrowed. What the evidence does show is the direction and the speed: the fastest-growing category in the federal budget is the bill for money already spent. That is the uncomfortable part for a reader who treats social security, Medicare, and the "safe" Treasury in their portfolio as things that simply cannot fail. All three rest on the same assumption — that Washington can keep funding a rising debt-service bill without something else giving way. On the current trajectory, that assumption is doing more work every fiscal year. Watch whether net interest actually tracks the official baseline. If it keeps running ahead of it, the day when that bill reshapes what your taxes pay for arrives sooner than the budget documents say. The ledger has already told you who pays first: the programs you were told could never lose funding.