Side Income & Monthly Earnings Simulator
Side Income Simulator
Calculate how many items you need to sell to earn ¥10,000, ¥30,000, or ¥50,000/month on flea market apps.
Also shows your tax-filing threshold and effective hourly wage.
¥
¥
¥
¥
min
Profit per item
¥1,500
Items needed per month
7
Items needed per week
2
Projected annual income
¥120,000
Effective hourly wage
¥4,285/hr
You're running an efficient side business!
Flea Market Side-Business Stages
| Stage | Monthly income | Items needed | Description |
|---|---|---|---|
| 🌱 Starter | Up to ¥5,000 | 3-5 items/mo | Achievable just by decluttering |
| 🌿 Beginner | ¥5,000-20,000 | 5-15 items/mo | A habit of listing 1-2x per week |
| 🌳 Intermediate | ¥20,000-50,000 | 15-35 items/mo | Starting to source and resell |
| 🏆 Advanced | ¥50,000+ | 35+ items/mo | Consider a secondhand dealer license |
* Estimated using a ¥2,000 average sale price and ¥1,400 profit per item
The Threshold for Filing a Tax Return
Salaried employees — filing required once annual profit exceeds ¥200,000
Homemakers & students — required over ¥480,000/year (tax-free up to the basic deduction)
Selling personal used items — generally tax-free (when selling things you bought for personal use)