The weighted repo rate was 4.99%, up from 4.90% at the previous auction held on September 3, the central bank said in a statement.
The marginal rate for all accepted bids was 4.90%, unchanged from last week.
At the September 3 reverse repo auction the central bank accepted all bids for Treasury bills worth 300 million kuna.
The Croatian central bank launched open market operations in April 2005 using T-bills as collateral and aiming to manage liquidity better and prevent sharp interest rate fluctuations.
1 euro = 7.1297 Croatian kuna)