Federal Reserve Chair Jerome Powell on Wednesday underscored the Fed's determination to raise interest rates high enough to slow inflation, a commitment that has fanned concerns that the central bank's fight against surging prices could tip the economy into recession.

Powell said the pace of future rate hikes will depend on whether — and how quickly — inflation starts to decline, something the Fed will assess on a “meeting by meeting” basis.

Its decision-making will be based on “the incoming data and the evolving outlook for the economy,” Powell said in prepared testimony to the Senate Banking Committee, which he is addressing as part of the Fed's semiannual policy report to Congress.

Powell's testimony comes a week after the Fed raised its benchmark interest rate by three quarters of a percentage point, its biggest hike in nearly three decades, to a range of 1.5% to 1.75%. With inflation worsening, the Fed's policymakers also forecast a more accelerated pace of rate hikes this year and next than they had predicted three months ago, with its key rate reaching 3.8% by the end of 2023. That would be its highest level in 15 years.

Concerns are growing that with inflation at a four-decade high, the Fed will end up tightening credit so much as to cause a recession. This week, Goldman Sachs estimated the likelihood of a recession at 30% over the next year and at 48% over the next two years.

A senior Republican on the Banking Committee, Sen. Thom Tillis of North Carolina, on Wednesday accused Powell of having taken too long to raise rates, saying the Fed’s hikes “are long overdue” and that its benchmark short-term rate should go much higher.

“The Fed has largely boxed itself into a menu of purely reactive policy measures,” Tillis said.

At a news conference last week, Powell suggested that a rate hike of either one-half or three-quarters of a point will be considered at the Fed’s next meeting in late July. Either one would exceed the quarter-point Fed hikes that have been typical in the past, and they reflect the central bank’s struggle to curb high inflation as quickly as possible.

Anticipating additional large rate hikes ahead, investors have sent Treasury yields sharply higher, making borrowing costs for home purchases, in particular, more expensive. With the average 30-year fixed mortgage rate up to roughly 5.8% — nearly twice the rate just a year ago — home sales have weakened. Credit card users and auto are also being hit with higher borrowing costs.

Fed officials hope that such changes will help achieve their goals of cooling demand enough to slow the economy and moderate price increases. In his testimony, Powell said the higher interest rates “should continue to temper growth and help bring demand into better balance with supply.”

The Fed’s aggressive pace of rate hikes has intensified fear that it will overly stifle business and consumer borrowing. But in projections they issued last week, Fed officials forecast that while the economy will slow sharply this year and next, it will continue to grow. They also projected, though, that the unemployment rate will rise a half-percentage point by 2024, an increase that economists say could lead to a recession.

Powell reiterated his view Wednesday that the U.S. economy “is very strong and well-positioned” to withstand higher rates. Yet with inflation causing hardships for millions of American households, he has stressed that moderating price spikes by raising rates is the Fed’s top priority.

On Wednesday, the Fed chair said the central bank’s policymakers “will be looking for compelling evidence that inflation is moving down” over the coming months before they would ease their pace of rate hikes. In a policy report to Congress it submitted late last week, the Fed said its commitment to fighting inflation is “unconditional.”

For now, most analysts expect a second three-quarter-point rate hike late next month and at least a half-point rate increase when the Fed meets again in September.

Even as borrowing costs mount and economic growth slows, inflation is expected to remain far above the Fed’s 2% annual target by the end of this year. On Sunday, Loretta Mester, president of the Federal Reserve Bank of Cleveland, predicted that bringing inflation back down to 2% “will take a couple of years.”

A combination of sluggish growth, a potential recession and still-high inflation would put the Fed in a bind: Further rate hikes would likely further weaken the economy and elevate unemployment. Yet suspending further interest rate increases could allow inflation to rage at painfully high levels and damage the economy.