Most people are not yet seeing the Trump tax cuts in their paychecks, or at least they're not noticing them, according to a poll released Tuesday.

Just 32 percent of respondents said they have higher take-home pay because of the tax cuts, according to a CNBC poll of 800 people. In contrast, about half of the people said they haven't seen an increase in their paychecks.

The poll is a warning sign for Republicans who are betting that the tax cuts will yield immediate benefits for families and aid them in the 2018 midterms.

Treasury Secretary Steven Mnuchin said in January that the vast majority of wage earners, around 90 percent, would see higher take-home pay because of the tax cuts. The IRS and private companies worked to change withholding tables and update payrolls so that most people would see the tax cuts in February.

The CNBC poll also suggests that a lot of people who are keeping more of their wages don't see the tax cuts as a big deal. Around 60 percent say the tax cuts help only a little or not much at all.