The 2020 Budget Bill cruised through the Senate on Friday and is on course to be forwarded to His Majesty the King for royal endorsement.
The senators voted 215-0 for the bill, with six abstentions, during a meeting that took only one hour.
The bill also easily passed the House of Representatives, by 257-1, on Thursday after the opposition opted out of the re-vote for the second and third readings ordered by the Constitutional Court due to proxy voting by the coalition parties.
Deputy Prime Minister Vissanu Kruea-ngam on Friday thanked the upper house for the quick vote.
The bill will be sent to Prime Minister Prayut Chan-o-cha next week and he will forward it to His Majesty the King for royal endorsement, he said.