Casual restaurant chain Portillo’s (NASDAQ:PTLO) will be reporting earnings tomorrow before market hours. Here's what to expect.

Last quarter Portillo's reported revenues of $166.8 million, up 10.4% year on year, missing analyst expectations by 2.3%. It was a mixed quarter for the company, with an impressive beat of analysts' gross margin estimates but a miss of analysts' revenue estimates.

Is Portillo's buy or sell heading into the earnings? Read our full analysis here, it's free.

This quarter analysts are expecting Portillo's's revenue to grow 22.1% year on year to $184.2 million, improving on the 8.6% year-over-year increase in revenue the company had recorded in the same quarter last year. Adjusted earnings are expected to come in at $0.05 per share.

Majority of analysts covering the company have reconfirmed their estimates over the last thirty days, suggesting they are expecting the business to stay the course heading into the earnings.

Looking at Portillo's's peers in the traditional fast food segment, some of them have already reported Q4 earnings results, giving us a hint what we can expect. Jack in the Box's revenues decreased 7.5% year on year, beating analyst estimates by 1.2% and Restaurant Brands reported revenues up 7.8% year on year, exceeding estimates by 1%. Both stocks (Jack in the Box traded and  Restaurant Brands) traded flat on the results.

Read our full analysis of Jack in the Box's results here and Restaurant Brands's results here.

Investors in the traditional fast food segment have had steady hands going into the earnings, with the stocks up on average 0.6% over the last month. Portillo's is down 5.2% during the same time, and is heading into the earnings with analyst price target of $21.3, compared to share price of $13.53.

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