WASHINGTON—The Trump administration expects annual budget deficits to rise nearly $100 billion more than previously forecast in each of the next three years, pushing the federal deficit above $1 trillion starting next year.

The revisions, which went largely unnoticed when the White House submitted its annual update to Congress last week, reflect the cost of federal spending increases agreed to earlier this year and higher interest payments.

The budget proposal released in February showed annual deficits totaling $7.1 trillion over 10 years. The latest revisions increase these cumulative deficits by $926 billion, to $8 trillion.

The report highlights the challenge the Trump administration faces in reducing deficits. Administration officials have said stronger economic growth would allow recent tax cuts to generate more revenue over the long run, offsetting initial declines in receipts from rate cuts.

But the latest projections show the deficit rising even though the administration projected an even stronger uptick in federal revenue.