"It's clear that it's going to cost more money than we thought," Social Democrat Migration Minister Morgan Johansson tells news agency TT.
Only in September, 24,306 people sought asylum in Sweden. In August, the country received 11,744 refugees. The highest figure registered during the Balkan Wars was 14,106 in July 1992.
Since the beginning of 2015, Sweden has received more than 73,000 asylum seekers, and the government's forecast for the entire year was 74,000.
This year, the government had set aside SEK 17.4 billion for migration costs and SEK 15.8 billion to help newcomers settle.
Johansson declined to give any exact figures of their new estimates.
"Right now the biggest challenge is to get a roof over their heads. It's about getting housing for 1,000 people every day. It's a huge logistical challenge," Johansson says.