While the US is expected to renew the Terrorism Risk Insurance Extension Act, negotiations in Germany to prolong the Extremus special insurance vehicle have been more difficult, said Munich Re.
Torsten Jeworrek, member of the board of management at Munich Re and in charge of corporate underwriting and global clients, said if Germany - or any other country - pulled out of terrorism pools, then Munich Re would "not be ready to provide the fallback".
He added: "Munich Re's position is that these pools are the only way of ensuring sufficient capacity for terrorism risks."
Mr Jeworrek also highlighted the urgency of the renewal, following the terrorism arrests earlier this month in Frankfurt.
Jacques Aigrain, chief executive officer at Swiss Re, shared Munich Re's view in supporting special insurance vehicles in each country.
Mr Aigrain said he was encouraging governments to become financially involved in the pools, especially where terrorism coverage is compulsory. He added that he was not advocating compulsory coverage, however, he pressed countries to be consistent in their policies.
In the UK, property damage resulting from terrorism is covered by the government-backed Pool Re.