The Independent Election Commission (IEC) said Abdullah was on 44.4 per cent with former World Bank economist Ghani on 33.2 per cent of the ballots so far counted from April 5, when eight candidates contested the race to succeed Hamid Karzai.
If no single candidate gains more than 50 per cent of the vote, a run-off between the two leading names is tentatively scheduled for May 28.
"Almost half of the clean votes have been counted," Ahmad Yousuf Nuristani, the IEC chief, told reporters.
With 3.45 million votes now counted, the overall turnout is set to be nearly seven million voters from an estimated electorate of 13.5 million people -- far above the 2009 turnout.
The eventual winner will have to lead the fight against a resilient Taliban insurgency as US-led combat troops prepare to leave Afghanistan this year, and must also strengthen an economy reliant on declining aid money.
Both candidates have expressed confidence they will win the election on the first round, but have also vowed to fight on if a run-off is necessary.
Abdullah, who came second to Karzai in 2009, has signalled that he may be open to constitutional changes that could allow for a power-sharing deal before the run-off.
Ghani, a former World Bank economist, has also raised the issue, but it is uncertain how any new system could accommodate the two rivals or how long it would take to implement.
You’ve hit your limit of 5 free articles this month.
Subscribe now for unlimited access.
Already subscribed? Log in
Subscribe to read the full story →
Smart Quarterly
₹900
3 Months
₹300/Month
Smart Essential
₹2,700
1 Year
₹225/Month
Super Saver
₹3,900
2 Years
₹162/Month
Renews automatically, cancel anytime
Here’s what’s included in our digital subscription plans
Access to Exclusive Premium Stories Online
Over 30 behind the paywall stories daily, handpicked by our editors for subscribers


Complimentary Access to The New York Times
News, Games, Cooking, Audio, Wirecutter & The Athletic
Business Standard Epaper
Digital replica of our daily newspaper — with options to read, save, and share


Curated Newsletters
Insights on markets, finance, politics, tech, and more delivered to your inbox
Market Analysis & Investment Insights
In-depth market analysis & insights with access to The Smart Investor


Archives
Repository of articles and publications dating back to 1997
Ad-free Reading
Uninterrupted reading experience with no advertisements


Seamless Access Across All Devices
Access Business Standard across devices — mobile, tablet, or PC, via web or app