WASHINGTON — The Federal Reserve is expected to end the year by raising its benchmark interest rate for just the fifth time since the financial crisis, as it continues to slowly unwind its post-crisis stimulus campaign. But pressures are building that could prompt the Fed to start moving a little more quickly.

Robust job creation in November is the latest sign of stronger economic growth, and it comes as Republicans are preparing a $1.5 trillion tax cut that President Trump has described as economic “rocket fuel.”

The Fed is widely expected to acknowledge the strength of the economy by increasing its benchmark rate by one quarter of a percentage point on Wednesday, after its final policy meeting of the year. Investors, however, already are looking beyond that decision. They want to know what comes next and whether the Fed, which will soon have a new chairman and several new governors, will deviate from the patient approach of the current Fed chairwoman, Janet L. Yellen.

The Fed predicted in September that it would increase rates three times in 2018 and two more times in 2019. On Wednesday, the Fed is also scheduled to release a new round of economic projections. Some Wall Street analysts expect stronger growth will push the Fed to add at least one rate increase in each of those years.