"Angola can receive a maximum USD 4.5 billion (4.0 billion euros)... The loan can be repaid in less than 10 years," IMF official Ricardo Velloso told reporters in Luanda during a two-week visit to the country.
Angola's economy grew rapidly after the end of the 27-year war as oil production fuelled a boom in the capital Luanda.
But it has depended on oil production for 95 per cent of its export earnings and more than half of government receipts.
"The outlook for 2016 remains difficult, despite the increase of oil prices in recent weeks, and economic activity will likely decelerate further.
More From This Section
"Maintaining fiscal prudence in the run-up to the 2017 elections will be critical."
It said Angola's GDP growth had slowed to three per cent in 2015 and that inflation was at an annualised 26 per cent to May.
Velloso said Angola had asked for the loan when oil prices were lower than the current rate and the government now have to confirm the loan sum.
Angola had a previous 2009-2012 support programme from the IMF which was worth USD 1.4 billion to help it resolve domestic debts, stabilise its exchange rate, and shore up its international reserves.