Business leaders have expressed marginal concern over the rejection of the draft charter and any delay in a new general election.
They see the procedure as still intact, with the roadmap to re-establish democracy in Thailand set by the National Council for Peace and Order.
The election delay of at least six months from the previous schedule is not a concern for either local or foreign business operators, said Vichai Assarasakorn, vice-chairman of the Thai Chamber of Commerce.
"The heads of foreign chambers I've spoken with were not worried about the vote results, as they understand a difference of opinion can happen during the drafting process," he said.
On Sunday, the 247-member National Reform Council (NRC) rejected the draft constitution by 135 votes to 105, with seven abstentions. The move delays the general election from September 2016 to April or May 2017 if a new draft charter and referendum are democratically passed.
"We'd be concerned if the move led to violence, but we're not worried about the politics," Mr Vichai said, adding that businesses were more concerned about the volatile global economy and weak Chinese market.
Supant Mongkolsuthree, chairman of the Federation of Thai Industries, said: "The delay in the constitution is unlikely to affect the economy, as political tensions have eased and the government is still there to solve the problem."
The new economic policy will help to stimulate the domestic economy, he said.
Darren Buckley, president of the American Chamber of Commerce in Thailand, said American investors remained confident in the Thai economy's long-term fundamentals.
"American businesses understand this is a short-term issue. We're still optimistic about the situation," he said.
Krailuck Asawachatroj, chief financial officer at industrial land operator Hemaraj Land and Development Plc, said his company's clients, mostly foreign investors, were not worried about any economic impact.
"I won't be concerned if the government stays for a year or two longer than expected, as it's trying to formulate policies to tackle the problem and help to stimulate the economy," he said.
Some economists believe the government could use the delay to speed up construction work.
"It's a great opportunity for the new economic team to prove themselves in trying to deal with the sluggishness and lay out a master plan to move the economy forward in the long term to regain trust from foreign investors," said Sompop Manarungsan, president of the Panyapiwat Institute of Technology.
Tim Leelahaphan, Maybank Kim Eng Securities' Thailand economist, said the NRC's charter rejection could induce short-term negative factors, but delays in the public referendum on the new charter and election date had not been pushed back extensively. The public referendum on the charter is expected to take place in next year's second quarter rather than in the first, while the general election could occur in early 2017 as opposed to late 2016.
The NRC's move is considered a "stop loss" in heightening greater conflicts on the charter referendum, as the public already perceives Prime Minister Prayut Chan-o-cha's government will stay on for some time regardless of Sunday's outcome, he said.
"If the NRC had approved the charter, uncertainty might have surrounded the referendum, as there would have been questions as to whether the public wanted the present government to continue implementing reforms for another two years," Mr Tim said.
He said domestic political risk remained low, while the government's recent economic stimulus measures could move the country forward in the coming months.
Most domestic and foreign investors surveyed placed greater emphasis on delays in the government's infrastructure investment projects, progress in Thailand's economic recovery and the momentum of the global economic recovery than the election date, said Amonthep Chawla, head of research at CIMB Thai Bank.