The consumer price index rose 8.38 percent on an annual basis, from 8.37 percent in November. The December pace was well below Bank Indonesia's estimate of 9-9.8 percent for full-year 2013 inflation.
Inflation in 2013 was nearly double 2012's rate of 4.3 percent.
The median in a Reuters poll was for December's inflation at 8.31 percent.