Several Fed policymakers have said publicly they felt a rate hike will likely be justified next month, though they are monitoring jobs and other data closely.
US Federal Reserve officials widely agreed last month the economy was nearing the point where interest rates should move higher, but worried lagging inflation and a weak global economy posed too big a risk to commit to "liftoff."
Only one Fed policymaker was ready to vote for a rate hike at the central bank's July 28-29 policy meeting, while some others "viewed the economic conditions for beginning to increase the target range for the federal funds rate as having been met or were confident that they would be met shortly," according to minutes from the meeting released on Wednesday.
"Most judged that the conditions for policy firming had not yet been achieved, but they noted that conditions were approaching that point," the minutes said.
That sentiment, combined with a broader recognition among "many members" that full employment was close, led the Fed to say in its post-meeting statement that it only needed to see "some" more improvement in labor markets before hiking rates.
But that feeling was offset by apparently widespread concern about weak inflation, tepid wages, and the fact that a six-year recovery had not moved inflation nearer to the Fed's 2 per cent inflation target.
"Almost all members ... would need to see more evidence that economic growth was sufficiently strong and labor market conditions had firmed enough for them to feel reasonably confident that inflation would return to the committee's longer-run objective over the medium term," the minutes said.
The Fed has said it wants to be "reasonably confident" in the inflation outlook before a rate hike.
Yields on long-term U.S. government bonds fell, US stocks pared losses and the dollar weakened after the release of the minutes, suggesting investors saw them as an indication the Fed would be cautious about hiking rates.
The minutes, however, reflected a now month-old snapshot of Fed opinion, with the data since that meeting having shown steady job growth and an uptick in consumer spending and housing that confirm the central bank's view of a growing economy.
"The overall message of the minutes is: 'we are getting there,'" wrote Harm Bandholz, chief U.S. economist for UniCredit Research.
The minutes did not make an overt reference to a possible September rate hike.
Setting the table
Several Fed policymakers have said publicly they felt a rate hike will likely be justified next month, though they are monitoring jobs and other data closely.
In the over-the-counter market, three-month overnight indexed swap rates implied traders now see a 35 per cent chance of the Fed hiking rates in September, compared to 46 per cent late on Tuesday, according to data from inter-dealer broker Tullett Prebon.
Though the initial hike will have little impact on consumer or business borrowing rates, which have already risen, it will still mark the start of a process that gradually makes it more expensive to buy homes and cars, or fund a vacation on the credit card.
But the discussion at the Fed's July meeting seemed to set the table for that eventuality.
It began discussing the mechanics of how to end its current policy of reinvesting the proceeds of maturing bonds and other assets purchased by the central bank during three rounds of a stimulus program known as quantitative easing.
The Fed has pledged not to reduce its asset holdings until after it begins raising rates.
Policymakers also took steps to clean up their quarterly presentation of economic forecasts, notably by agreeing that once they begin raising rates they will no longer need to publish an existing chart indicating the year in which officials think rates will rise.
That particular graph had become very lopsided: as of June, 15 members said they felt the rates "liftoff" would occur this year, with only two expecting it in 2016.
