President Joe Biden offered to freeze government spending at current levels during crunch debt talks with Republicans, which would reduce the deficit by $1 trillion, U.S. Treasury Secretary Janet Yellen said Wednesday.

The savings proposed by Biden narrow the difference between Republican and Democratic spending plans as the two sides seek an agreement to raise US borrowing limits and avert a potentially catastrophic debt default.

Republican and Democratic negotiators were due to resume debt talks at noon, according to a person familiar with the talks who requested anonymity to discuss ongoing negotiations.

Yellen has repeatedly said the government could run out of money to pay for its existing obligations as early as June 1. That is now eight days away.

"The President's budget that he put forward actually proposes $3 trillion worth of deficit reduction over 10 years," Yellen said at a Wall Street Journal event Wednesday.

"In this negotiation, the President has already offered changes that would result in an additional trillion dollars of deficit reduction," she added.

Yellen's comments suggest the two sides are moving closer together on the top line figure, although significant disagreements remain about how the deficit reduction would occur.

The Republicans say their spending plans would cut the deficit by $4.8 trillion over a decade, but insist there should be no cuts to the defense or border security budgets.

The White House says any cuts to the deficit should apply more broadly to reduce the burden on individual departments, and wants to raise some taxes to fund the deficit reduction -- which Republicans have so far opposed.

The additional trillion dollars in savings proposed by the president would be realized over the next 10 years, according to the person familiar with the talks.

Other areas of compromise from the president include proposals to rescind unspent COVID-19 relief funds, the person said.