Polls to open at 8 am (03:00 GMT) and close at 5 pm (12:00 GMT). Polling may be extended in some areas as per the election commission’s rules.
Voters will cast their ballots for two legislators to represent their constituency – one federally and the other provincially.
5,121 candidates are contesting for the federal legislature and 12,695 for the provinces.
A major crackdown on the biggest opposition party and its leader, former PM Imran Khan, has fuelled concerns that the polls will not be free and fair.
At least 24 people were killed in two attacks on candidates’ political offices in Balochistan province on Wednesday.