Free · No Account · Saved Locally · Platform Fee Calculator
Flip Journal
Track every card flip with P&L analytics. Log buys, mark sells, and see your profit by sport, platform, and month. Built for flippers who want to know if they're actually making money.
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Total Flips
+$0.00
Net P&L
0%
Win Rate
0%
Avg ROI
📓
No flips logged yet
Start tracking your card flips to see profit and loss over time.
How the Flip Journal Works
1. Log Buys
Record every card you purchase with price, platform, date, and shipping costs. Track your inventory of cards waiting to flip.
2. Mark Sells
When you sell a card, mark it sold with the sale price and platform. Fees are automatically calculated per platform.
3. See P&L
Analytics show your net profit, win rate, ROI, best/worst flips, and breakdowns by sport and platform.
Platform Fee Reference
eBay13.1%
Mercari10.0%
COMC20.0%
MySlabs8.0%
Facebook5.0%
Whatnot8.9%
Frequently Asked Questions
What is the Flip Journal?
The Flip Journal is a free profit-and-loss tracking tool for card flippers. Log every card you buy and sell, and the journal automatically calculates your net profit, ROI, platform fees, and win rate. It works like a personal ledger for your card flipping business.
How are platform fees calculated?
Each platform has a different seller fee structure. eBay charges approximately 13.12% (final value fee + payment processing). Mercari takes 10%. COMC charges 20%. MySlabs charges 8%. Whatnot takes 8.9%. Facebook Marketplace charges 5%. Card show sales and direct trades have 0% fees. The journal applies these automatically when you select a sell platform.
Is my data saved?
Yes — all flip data is saved locally in your browser using localStorage. Your data stays on your device and is never sent to any server. This means it is private, but also means if you clear your browser data, your journal entries will be lost. Use the Copy P&L button to export your data regularly.
What is a good win rate for card flipping?
Experienced card flippers typically aim for a 60-70% win rate. Breaking even on some flips is normal — the key is making your wins bigger than your losses. Focus on cards you know well, buy at the right time (off-season dips), and sell during demand spikes (playoffs, draft night). A 50%+ ROI per successful flip is considered strong.
How do I track grading costs?
When logging a flip, use the Grading Cost field to add PSA, BGS, CGC, or SGC submission fees. This cost is factored into your total investment and profit calculation. For example, if you buy a card for $20, pay $30 for PSA grading, and sell the PSA 10 for $120 on eBay, your profit is $120 minus $20 minus $30 minus $15.74 (eBay fees) minus shipping = approximately $50.