Macron was projected to score 23-24 percent, with Le Pen at 21.6-23 per cent, according to several polling institutes.
If the first-round result is confirmed, it would put the 39-year-old pro-Europe Macron within striking distance of the presidency.
He is on course to face eurosceptic, anti-immigration Le Pen in the May 7 vote seen as vital for the future of the ailing European Union.