This was said by a treasury official on Thursday.
"We do have 1 billion US dollars that we need to fund," Tshepiso Moahloli, director of debt issuance and management at South Africa's National Treasury, told Reuters on the side-lines of an investment conference. "We will be opportunistic."
Moahloli said no decision had been made on which currency the debt would be issued in or on exact timing. But when asked about maturities she added: "We are looking beyond the 10 year space – it could be 15 (years), we have also done some 12 (years)."
South Africa's government said in its medium-term budget published in October it planned to borrow 4 billion US dollars over the medium term from international markets.