For three months in a row, the money the United States collects at its border has been a negative number. In July, net customs receipts came to minus $8.55 billion: the government paid out $33.38 billion in tariff refunds and collected less than that in duties. A year earlier, that same line brought in $27.7 billion.
The refunds trace back to February, when the Supreme Court held that the emergency law behind the tariffs did not authorize them. Roughly $166 billion had been collected under it. Customs and Border Protection told the trade court it had paid back about $100 billion by the end of July — sixty cents on the dollar — and by law the refunds carry interest. Which makes the year of collections look less like a tax than like an unplanned loan: importers advanced the money, and the Treasury is now returning it.
The money was booked as revenue in 2025 and is leaving as an outlay in 2026. June alone sent $49.2 billion back out.
None of that is why the country is $40 trillion in debt. The debt crossed that line on August 18, months ahead of forecast, and the refunds moved the date rather than the direction. In February, before the ruling, the Congressional Budget Office already had this year's gap between spending and revenue approaching $2 trillion.
Treasury Secretary Scott Bessent calls the refunds a one-time item and says 2026 tariff income should roughly match last year's once duties are reimposed under other statutes. He is describing something already underway. In the same month the customs line ran negative, duties of 10 or 12.5 percent went on 60 major trading partners covering more than 99 percent of American imports, this time under rules about forced-labor enforcement. Same containers, different statute.
What the refunds bought was a change in timing, and timing is the expensive part. The CBO now expects full-year customs collections to land about $250 billion below its February estimate, and the borrowing that fills that hole is meeting a bond market that spent the summer asking for more — the 30-year yield passed 5.3 percent that same week, its highest since 2007.
Servicing the debt now costs over $1 trillion a year, the government's second-largest expense after Social Security. A tariff is money arriving at the border. For three months it has been money leaving, and the difference is being made up in a market where the terms are set by someone else.
The money was booked as revenue in 2025 and is leaving as an outlay in 2026.
