ROI Calculator for Reselling
Calculate your return on investment, profit margin, and hourly earnings for reselling items on Japanese flea market apps.
Include sourcing, listing, packaging, and shipping time
Understanding ROI for Reselling
What is ROI?
Return on Investment (ROI) shows how much profit you make relative to your initial investment. An ROI of 100% means you doubled your money.
Hourly Rate Matters
A ¥500 profit on 2 hours of work is only ¥250/hour. Compare this to minimum wage (¥1,000+/hour in Tokyo) to see if reselling is worth your time.
Platform Fees
- Mercari: 10% of sale price
- Yahoo Auctions: 8.8% (premium members)
- Rakuma: 6% (lowest fee)
Frequently Asked Questions
What is a good ROI for reselling on Mercari?
Aim for at least 30–50% ROI after all fees. Items with ROI below 20% are often not worth the time investment when you factor in listing, packaging, and shipping time.
Does Mercari charge sales tax?
Mercari Japan charges a flat 10% selling fee on the final sale price. There is no additional consumption tax charged to sellers on the platform fee — the 10% is the total platform cost.
How do I factor in shipping cost?
Enter the actual shipping cost you will pay. For Mercari anonymous shipping (ゆうゆうメルカリ便), typical costs are ¥230 for small items up to ¥1,750 for large boxes. Always use the actual shipping cost, not the amount charged to the buyer.
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Last updated: March 2026