Agreements are expected to be confirmed on 7 April
Saudi Arabia is expected to sign $20bn-worth of energy contracts during King Salman bin Abdulaziz al-Sauds visit to Cairo this week.
The financing deal, intended to service the Egyptian oil and gas sectors needs for the next five years, will also include a $1.5bn package to develop the Sinai region, UK news agency Reuters cited two Egyptian government sources as saying.
Riyadh has provided financial and political support to Egypt since Mohamed Mursis Muslim Brotherhood-backed government was overthrown in 2013.
The Sinai region is particularly affected by Islamist insurgency, with the jihadist group Islamic State in Iraq and Syrias (Isis) Sinai Branch, Ansar Bait al-Maqdis, claiming resposibility for the bombing of Russias Metrojet Flight 9268, which killed 224 people.
Saudi Arabia in particular has been a strong supporter of Egypts current government, and in March, the kingdom made significant deposits to help boost the Egyptian economy.
In early 2015, $6bn in long-term deposits from Saudi Arabia, the UAE and Kuwait boosted the North African countrys net international reserves.
The three GCC countries pledged a further $6.5bn in aid to Egypt, and there are reports they have transferred higher levels without fanfare.
Saudi Arabias most recent pledge of investment was made in December 2015, amounting to $8bn, although it is unclear if this is linked to the $20bn in investments set to be confirmed during King Salmans impending visit to Cairo.
The energy financing will come with an interest rate of 2 per cent and a grace period of at least three years, according to the report.
Separately, the deputy head of the Saudi-Egyptian Business Council said on Tuesday that Saudi businessmen will invest a total of $4bn in schemes including the Suez Canal, energy and agriculture, and had already deposited 10 per cent of that sum in Egyptian banks.
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