The Kobeissi Letter, a markets commentary publication, reported today on X that the interest expense on US public debt reached a record $1.36 trillion in fiscal year 2026. This figure represents a $144 billion, or 12%, increase year-over-year. The publication noted this marks the sixth consecutive annual rise, totaling an increase of $839 billion, or 161%, over that period. "Interest expense on US public debt rose +$144 billion YoY in FY2026, or +12%, to a record $1.36 trillion," the post stated. It also pointed out that total government receipts grew by only 3.2% year-over-year to $5.40 trillion.
This rise in interest costs comes as market participants monitor persistent inflation and its impact on borrowing costs. Recent Gokhshtein coverage includes Mohamed El-Erian's warning about persistent inflation posing a risk to growth and Lyn Alden's observation that bond market yields remain high due to sustained inflationary pressures. Higher interest rates typically translate to increased government borrowing costs, directly impacting the federal budget.
The Kobeissi Letter's analysis implies that the growing burden of debt servicing is a significant fiscal challenge. The publication highlighted that interest on federal debt now accounts for 25% of total US government receipts. It further projected that, at the current pace, interest costs will surpass Social Security—which jumped 5.5% to $1.67 trillion—as the largest government outlay by the end of 2028, questioning the long-term fiscal strategy.
