Introduction
Corporate taxes (Income Tax Expense) are one of the largest expenses of any profitable company. The effective tax rate can vary significantly between companies and countries.
Explanation
Companies pay taxes on their profits. The nominal rate in the US is ~21%, but the effective rate (what you actually pay) can be much lower or higher due to deductions, tax credits, foreign taxes, etc.
Formula
Effective Tax Rate = (Tax Expense / EBT) × 100
Example
Apple vs Amazon: - Apple: EBT $120B, Taxes $18B → Effective rate = 15% - Amazon (2018): EBT $10B, Taxes $0 → Effective rate = 0% Amazon paid zero federal taxes in 2018 using R&D tax credits and accumulated losses from previous years.
How to read it
Effective rate < 15% is excellent (company optimizes taxes legally). Rate 15-25% is normal. Rate > 30% may indicate fiscal inefficiency. Tech companies usually have low rates using international structures (Ireland, etc.). Red flag: Erratic effective rate from year to year may indicate artificial benefits or aggressive tax practices.
Key takeaways
- Effective Rate = Taxes / EBT
- US nominal rate: ~21%, but effective varies
- Amazon paid 0% in 2018 using credits and losses
- Rate < 15% is excellent optimization
- Erratic rate year to year = red flag