Monthly tax calendar
Filing, tax payment and insurance deadlines for the month — already moved forward where a deadline falls on a day off.
Month 09/2026
September has no quarterly return deadline. Monthly filers submit their August returns. The 20/09 deadline falls on a Sunday and moves to Monday 21/09/2026.
- 2109/2026Monday
File and pay VAT and personal income tax for August 2026
Applies to: Businesses that file monthly
Original deadline 20/09/2026 (Sunday) — falls on a day off, so it moves to the next working day
Legal basis: Luật Quản lý thuế 2025; Nghị định 252/2026/NĐ-CP
- 3009/2026Wednesday
Pay social, health and unemployment insurance for August 2026
Applies to: Employers with staff under compulsory insurance, paying monthly
Due by the last day of the following month.
Legal basis: Khoản 4 Điều 34 Luật Bảo hiểm xã hội 2024
Month 10/2026
October is when third-quarter 2026 returns fall due, so both monthly and quarterly filers have work to do. The quarterly deadline falls on a Saturday and moves to Monday 02/11/2026.
- 2010/2026Tuesday
File and pay VAT and personal income tax for September 2026
Applies to: Businesses that file monthly
Legal basis: Luật Quản lý thuế 2025; Nghị định 252/2026/NĐ-CP
- 3110/2026Saturday
Pay social, health and unemployment insurance for September 2026
Applies to: Employers with staff under compulsory insurance, paying monthly
Due by the last day of the following month. 31/10/2026 is a Saturday — complete it by Friday 30/10/2026 to be safe.
Legal basis: Khoản 4 Điều 34 Luật Bảo hiểm xã hội 2024
- 0211/2026Monday
File and pay VAT and personal income tax for Q3 2026
Applies to: Businesses that file quarterly
Original deadline 31/10/2026 (Saturday) — falls on a day off, so it moves to the next working day
Legal basis: Luật Quản lý thuế 2025; Nghị định 252/2026/NĐ-CP
- 0211/2026Monday
Provisional corporate income tax payment for Q3 2026
Applies to: All businesses liable for corporate income tax
Original deadline 31/10/2026 (Saturday) — falls on a day off, so it moves to the next working day
A quarterly provisional payment with no return to file. Businesses eligible for the 30% reduction under Nghị quyết 43/2026/QH16 should confirm the amount with their accountant first.
Legal basis: Luật Quản lý thuế 2025; Nghị định 252/2026/NĐ-CP
Month 11/2026
November is a light month: only monthly filers have a return due. It is a good moment to review documents ahead of the 2026 year-end finalization.
- 2011/2026Friday
File and pay VAT and personal income tax for October 2026
Applies to: Businesses that file monthly
Legal basis: Luật Quản lý thuế 2025; Nghị định 252/2026/NĐ-CP
- 3011/2026Monday
Pay social, health and unemployment insurance for October 2026
Applies to: Employers with staff under compulsory insurance, paying monthly
Legal basis: Khoản 4 Điều 34 Luật Bảo hiểm xã hội 2024
Need advice on your own situation?
Every business is different. Contact TRÍ TÍN to get advice for your specific case before you act.
