BOI Tax Exemption: Maximizing 8 Years of Savings | Siam Advice Firm

For BOI-promoted companies, the 8-year tax exemption is the crown jewel benefit. Let's explore how to maximize these savings.

How the Exemption Works

Standard BOI Package

Years 1-8: 0% corporate income tax on promoted activities
Condition: Must be from revenue generated by promoted activities
Savings: Potentially 6-8 million THB+ over 8 years

Exemption Start Date

The 8-year clock starts when you first earn revenue from promoted activities, not when:

You receive BOI certificate
You register the company
You start operations

Planning tip: Delay revenue recognition until you're fully operational to maximize the 8-year period.

Calculating Your Savings

Example: Software Company

Annual profit from promoted activities: 10 million THB

Without BOI:

Year 1-8: 10M × 20% = 2M THB tax per year
Total tax: 16 million THB

With BOI:

Year 1-8: 10M × 0% = 0 THB tax per year
Total tax: 0 THB

Savings: 16 million THB over 8 years

Mixed Revenue Scenarios

Promoted vs. Non-Promoted Revenue

If you earn revenue from both promoted and non-promoted activities:

Example:

Software development (promoted): 8M THB
Consulting services (non-promoted): 2M THB
Total revenue: 10M THB

Tax treatment:

Promoted revenue (8M): 0% tax
Non-promoted revenue (2M): 20% tax = 400,000 THB

Critical: You must maintain separate accounting for each activity.

Maximizing the Benefit

Strategy 1: Maximize Promoted Activities

Structure your business to maximize revenue from promoted activities:

Example:

Instead of: Selling software + consulting (mixed)
Do: Sell software licenses only (100% promoted)
Result: All revenue tax-exempt

Strategy 2: Proper Revenue Allocation

When activities overlap, allocate revenue carefully:

Example: You develop custom software

Development work: Promoted activity (0% tax)
Ongoing support: Could be non-promoted (20% tax)

Solution: Structure as "software license with included support" to keep it all promoted.

Strategy 3: Reinvest During Exemption

Since you're not paying tax, you have extra cash flow:

Annual profit: 10M THB Tax saved: 2M THB

Options:

Hire more staff
Invest in R&D (build future deductions)
Expand operations
Build cash reserves for post-exemption period

After the 8 Years

Year 9 Onwards

Return to 20% corporate tax on all profits
Or apply for BOI extension (if eligible)
Or restructure with new BOI promotion

Planning for Transition

Year 6-7: Start planning for post-exemption:

Build R&D deductions (200% benefit)
Implement training programs (200% benefit)
Consider new BOI projects
Optimize capital structure

Common Mistakes

Mistake 1: Poor Activity Separation

Problem: Mixing promoted and non-promoted revenue without clear records

Result: Revenue Department may tax all revenue at 20%

Solution: Maintain separate books, invoices, and bank accounts if possible

Mistake 2: Starting Revenue Too Early

Problem: Earning revenue before fully operational

Result: Wasting exemption years on low revenue

Solution: Delay revenue recognition until you can maximize it

Mistake 3: Ignoring Compliance

Problem: Not filing required BOI reports

Result: Exemption can be revoked retroactively

Solution: File all BOI reports on time (annual, progress, etc.)

BOI Reporting Requirements

To maintain your exemption:

Annual Report

Due: Within 90 days of fiscal year-end
Content: Financial statements, employment data, investment progress

Progress Report

Frequency: As required by BOI (often quarterly)
Content: Project milestones, investment status

Compliance Audit

BOI may audit to verify:
- Actual promoted activities
- Investment commitments met
- Employment targets achieved

Extension Possibilities

Some BOI categories allow extension beyond 8 years:

Additional 5 years for certain locations
Extra benefits for R&D investment
Extended exemption for expansion projects

Requirement: Must apply before initial period ends.

Related Service: BOI Promotion & Investment Incentives — Maximize your BOI tax benefits with expert guidance.