A
new analysis indicates Republicans’ plan to extend soon-to-expire provisions of their party’s 2017 tax law, as well as their push to tack on additional tax breaks largely benefitting the rich and big corporations, would cost $7 trillion over the next decade, a figure that a group of congressional Democrats called “staggering.”

The
analysis from the nonpartisan Congressional Budget Office (CBO), published on Thursday, updates previous estimates that suggested the GOP effort to extend expiring provisions of the 2017 law would cost $4.6 trillion over a 10-year period. The new assessment shows that extending the law’s temporary provisions—which disproportionately favored the wealthy—would cost $5.5 trillion over the next decade.

The projected cost of the GOP agenda balloons to $7 trillion after adding Senate Republicans’ call for
$1.5 trillion in additional tax cuts in the budget resolution they advanced in a party-line vote on Thursday. The GOP has come under fire for using an accounting trick to claim their proposed tax cuts would have no budgetary impact.

“The Republican handouts to billionaires and corporations will come at a staggering cost, and it’s unconscionable that their plan to pay for those handouts includes kicking millions of Americans off their health insurance, hiking the cost of living with tariffs, and driving up child hunger,” Sen. Ron Wyden (D-Ore.), Sen. Jeff Merkley (D-Ore.), Rep. Richard Neal (D-Mass.), and Rep. Brendan Boyle (D-Pa.) said in a
joint statement issued in response to the CBO figures.

“Even after making painful cuts that will inflict hardship on typical American families, Republicans will still risk sending us into a catastrophic debt spiral that does permanent harm to our economy,” the Democrats added. “What Republicans are trying to jam through Congress right now is a level of economic recklessness we’ve never seen before.”

The CBO’s updated cost analysis came as President Donald Trump plowed ahead with what’s been characterized as the
biggest tax hike in U.S. history, one that will hit working-class Americans in the form of price increases on household staples and other goods.

Trump administration officials,
not known for providing reliable numbers, have claimed the president’s sweeping new tariffs could produce roughly $6 trillion in federal revenue over the next decade. The Trump tariffs have sent financial markets into a tailspin, heightened recession fears, and prompted swift retaliation from targeted nations, including China.

In an
appearance on MSNBC on Thursday, Boyle—the top Democrat on the House Budget Committee—said Trump’s tariffs represent “the single largest tax increase in American history.”

“It’s a tax that everyone will pay in this country, based on the goods that they buy,” said Boyle. “However, it’s also a tax that is highly regressive—the poorest amongst us will end up paying a higher percentage of their income.”