(Adds analyst comments)
By Peter Laca
BRATISLAVA, April 29 (Reuters) - The Slovak central bank left interest rates unchanged on Tuesday, keeping borrowing costs steady for the 12th consecutive month just a week before a ruling on the country's bid to adopt the euro.
The decision, made at the monthly monetary policy meeting, left the key two-week repo rate at 4.25 percent, preserving a 25 basis point premium over the euro zone benchmark rate.
The central bank did not comment on the decision, saying board members would provide more information at a news conference scheduled for 1030 GMT.
The National Bank of Slovakia (NBS) has kept borrowing costs steady in the past year amid accelerating inflation, saying prices were driven by factors outside the influence of its monetary policy, such as food and energy.
Despite accelerating price growth, Slovakia's 12-month average inflation rate, calculated to March 2008, was well below the threshold for euro adoption.
Economic forecasts by the European Commission, the European Union's executive arm, indicated on Monday that Slovak inflation was set to remain under the reference value for entering the single currency area this year and in 2009, when it aims to join.
The Slovak crown was flat after the decision at 32.250 per euro, shy of all-time high of 32.200 following the Commission's forecasts on Monday. The strong crown has helped keep inflation low.
Slovak government and central bank officials said the commission's forecasts showed Slovakia was able to meet the inflation criterion in a sustainable way, a key issue in assessing Bratislava's readiness to adopt the euro.
The European Commission will say on May 7 whether Slovakia is ready to become the 16th member of the euro zone, and on Tuesday a news item on the European Union affairs website EUobserver.com cited the commission's draft report as saying Bratislava was set to get the green light.
CAUTIOUS STANCE
Analysts said demand-led pressures were gradually rising in the fast growing Slovak economy -- as elsewhere around the globe -- which warranted a cautious monetary policy stance.
In other emerging markets, inflation prompted rate hikes in Russia and Hungary on Monday, and Brazil and South Africa earlier. Turkey is seen raising as well, although most central European banks meeting in the coming weeks are seen staying put.
Slovakia will to have align its borrowing costs with the European Central Bank as part of the euro adoption process, but market watchers saw no need to rush with the adjustment.
"We expect the NBS to adjust its policy rate to the ECB level only in 3Q08 (the third quarter of this year), after the announcement of the final conversion rate in July," said Eduard Hagar, an analyst with ING Bank in Bratislava.
Rising prices and the European Central Bank's tough anti-inflation rhetoric have prompted some analysts to push back their expectations of a euro zone interest rate cut. However, slowing German inflation in April suggested price pressures in the euro zone have retreated, and with them the risk of monetary policy tightening by the ECB.
An eventual rate cut by the ECB would mean even more significant monetary easing in Slovakia after it abandons the currency and independent monetary policy.
Many analysts said setting the crown switchover rate at a strong level would help counter some inflation pressures after euro adoption. (Reporting by Peter Laca; Editing by Michael Winfrey and Gerrard Raven)