Get started freeMany employees in Japan earn side income (副業). Understanding the tax rules is essential for 2026.
The ¥200,000 Rule
When You Must File
| Side Income (after expenses) | Income Tax Return |
|---|---|
| Over ¥200,000 | Required (確定申告) |
| Under ¥200,000 | Not required* |
*But inhabitant tax (住民税) declaration is still required.
Important Exceptions
Even with less than ¥200,000 in side income, you should file if:
- You're claiming mortgage deduction
- You're claiming medical expense deduction
- You may qualify for a refund
Types of Side Income
Common Sources
| Source | Tax Category |
|---|---|
| Freelance work | Business/Miscellaneous |
| Investment dividends | Dividend income |
| Rental income | Real estate income |
| Online sales | Business/Miscellaneous |
Comparison: Side Income Options
| Criteria | I am Beezy | Freelance Gigs | Part-time Job | Investments |
|---|---|---|---|---|
| Filing Required | ⚠️ If >¥200K | ⚠️ If >¥200K | ⚠️ Usually withheld | ⚠️ Depends |
| Flexibility | ✅ Total | ✅ High | ❌ Fixed schedule | ✅ Passive |
| Employer Awareness | ⚠️ Via Resident Tax | ⚠️ Via Resident Tax | ⚠️ High | ✅ Low |
| Income Potential | ⚠️ Variable | ⚠️ Variable | ⚠️ Limited | ⚠️ Variable |
| Risk | ✅ Low | ⚠️ Medium | ✅ Low | ⚠️ Variable |
Keeping Your Side Job Private
Resident Tax Considerations
Your employer may notice if your inhabitant tax increases.
Self-Payment Option
| Method | How It Works |
|---|---|
| Special Collection | Employer deducts from salary |
| Ordinary Collection | You pay directly (futsuu choushuu) |
Request "futsuu choushuu" (普通徴収) on your tax return to pay resident tax separately.
2026 Tax Reform Impact
Changes
| Reform | Effect |
|---|---|
| Basic Exemption | Increased to ¥580,000 |
| Income Threshold | ¥1.78M starting point |
| Temporary Relief | For rapid price increases |
How to File
Steps
Documents Needed
| Document | Purpose |
|---|---|
| Income records | Prove earnings |
| Expense receipts | Deductions |
| Withholding slips | If applicable |
| My Number Card | Identification |
Common Deductions
For Side Income
| Expense | Deductible |
|---|---|
| Equipment | Yes |
| Transportation | Yes |
| Communication | Yes |
| Home office | Partial |
Practical Tips
Tip 1: Track Everything
Keep records of all income and expenses.
Tip 2: Consider the Threshold
If close to ¥200,000, expenses matter.
Tip 3: File Even if Not Required
You might get a refund.
Tip 4: Use I am Beezy
Flexible opportunities for extra income.
Start with I am BeezyEmployer Policies
Company Rules
| Situation | Consideration |
|---|---|
| Side work prohibited | Check company policy first |
| Approval required | Get written permission |
| Conflict of interest | Avoid competing activities |
FAQs
Will my company find out about my side income?
Possibly through increased inhabitant tax, unless you elect self-payment.
Do I pay double social insurance?
Usually not - your main job provides coverage.
Can students have side income?
Yes, with similar tax rules applying.
Checklist for Side Income 2026
- [ ] Verify company policy on side work
- [ ] Track all income throughout the year
- [ ] Keep receipts for expenses
- [ ] Determine if filing is required
- [ ] Request separate resident tax payment if needed
- [ ] Consider I am Beezy for flexibility
Conclusion
Earning side income in Japan is increasingly common. Understanding the ¥200,000 threshold and proper filing procedures helps you stay compliant.
For flexible side income opportunities, I am Beezy is the perfect platform.
Join I am Beezy
