Important new rules for the new Corporate Income Tax framework
17 March, 2026
On 12 March, the Ministry of Finance issued Circular 20/2026/TT-BTC, providing guidance on implementation of the Law on Corporate Income Tax 2025 and Decree 320/2025. Circular 20 takes effect from 12 March 2026 and applies to the 2025 tax year onwards.
Circular 20 focuses on documentary, procedural and administrative guidance, and therefore plays a critical role in determining how enterprises apply the new CIT framework in practice. Circular 20 will have major implications both for Vietnamese enterprises, and also foreign enterprises doing business in, or deriving income from, Vietnam.
