The US Consumer Price Index is expected to rise by 0.5% in May after a 0.6% gain in April, according to a survey compiled by Bloomberg.
The year-over-year rate is forecast to rise to 4.2% from 3.8% as a result.
The CPI data are scheduled to be released at 8:30 am ET Wednesday.
The same survey looks for a 0.3% increase in core CPI, excluding the volatile food and energy components after 0.4% increase. The year-over-year rate is expected to accelerate to 2.9% from 2.8%.
Prices in the owners' equivalent rents and regular rents categories are forecast to continue to advance after the growth pace of both accelerated in April. Those two categories combine for nearly one-third of overall CPI and are a key focus for the Federal Reserve.
New vehicle prices and used vehicle prices are expected to rebound modestly after weakness in the previous two months.
The Federal Reserve's preferred inflation measures for May, the overall and core PCE price readings, are due to be released on June 25.