Vietnam's consumer price index (CPI) is estimated to have risen 8.3 percent in October from a year earlier, the General Statistics Office said on Monday.
That compares with an increase of 7.8 percent in September and 7.3 percent in August.
The government last week forecast that inflation would be around 8 percent in 2005, higher than its initial target of keeping it below 6.5 percent.
Vietnam, reliant on oil product imports and hard-hit by bird flu outbreaks that reduced food supplies, saw inflation reach 9.5 percent last year.