(Adds context, details of swap)
MOSCOW, March 14 (Reuters) - Russia plans to issue new Eurobonds and swap existing ones in one go, though not necessarily in a single day, Russian Finance Minister Anton Siluanov said on Wednesday.
According to its 2018 budget, Russia plans to place up to $3 billion in new bonds this month.
Moscow also plans to swap up to $4 billion more of the bonds this year for debt with lower coupons. Moscow started swapping its benchmark Russia-30 Eurobond last year as part of efforts to bring down its debt-servicing costs
"We will do this in one go, but that doesn't mean we'll do it in one day, in a single package," Siluanov said.
To replace the Russia-30, on which Moscow pays a 7.5 percent coupon, the finance ministry was considering offering additional issues of Eurobonds maturing in 2027 and 2047 with 4.25 percent and 5.25 percent coupons, respectively. .
Last year, Russian President Vladimir Putin ordered that Eurobonds be offered to help Russians holding capital abroad bring their money home. The finance ministry promised to give preference to Russians when selling sovereign Eurobonds . (Reporting by Andrey Ostroukh; writing by Polina Ivanova; editing by Larry King)