The federal government borrows at an average rate of 3.49%. You borrow at 6.71% for a 30-year mortgage, and worse than that for anything else. If you’ve been sitting on a decision until the cheap-money era comes back, it’s worth understanding who’s standing in front of you in the line for that money.
Treasury’s own daily ledger put total public debt outstanding at $40,102,964,278,586 on September 3, 2026. Forty trillion dollars, tallied to the penny, because that is genuinely how they publish it.
The number that should get your attention isn’t the balance. It’s the payment.
Through the first ten months of fiscal 2026, the government spent $931 billion on interest, up 11% from $842 billion over the same stretch a year earlier. That makes interest the third-largest thing the federal government buys, behind only Social Security and Medicare. It now outranks defense.
Here’s the part nobody puts in a headline. That 3.49% average is not today’s rate. It’s a blended number across decades of borrowing, most of it locked in when money was close to free. Treasury bills, the short-term paper the government has to roll over constantly, already average 3.788%. Every time an old cheap bond matures, it gets replaced at whatever the market charges now, and the blended average ratchets up. Nobody in Washington votes on that. It happens on its own.
Sound familiar? It’s an adjustable-rate loan the size of the economy, resetting a slice at a time.
That’s the connection to your rate. Long mortgage pricing tracks the long end of the Treasury market, not the Fed’s overnight rate, and Treasury has to find buyers for $32.4 trillion of debt held by the public. It competes for that money with your lender, your credit union, and your card issuer. When the government’s borrowing appetite grows and its interest bill grows 11% a year, the price of long-term money does not quietly fall because the short end got trimmed.
Watch what actually happened. Freddie Mac put the 30-year fixed at 6.71% on September 3, up from 6.66% the week before and 6.50% a year earlier. Rates went up across twelve months in which the entire industry told you cuts were coming.
The verdict: stop building your household plan around a rate that hasn’t shown up in two years.
Do this now. Price every decision at the number in front of you. If a refinance works at 6.71%, take it. If it only works at 5.5%, it isn’t a plan, it’s a wish, and you can check that in about four minutes on our mortgage calculator. Pay down your variable-rate debt first, credit cards and HELOCs, because that’s the debt that behaves like Treasury bills: it reprices on you without asking. The debt payoff calculator will show you which balance to hit.
Then take the other side of the trade. The same yields making your borrowing expensive are why cash still pays something worth having. A savings account earning nothing in this environment is a choice you’re making, not a market condition, and our savings hub is where to fix it.
File this away for the rest of the decade. An 11% annual climb in the interest bill compounds, and the cheap bonds still left to roll over get scarcer every month. Whatever your politics, the arithmetic on the other side of your loan application doesn’t care.
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