The Best Reseller Tax Calculator for Online Flippers on eBay, Etsy, Poshmark & More
Most self-employment tax calculators assume you earned what your 1099-K says. This one starts where resellers actually live: enter income per platform, subtract COGS and fees, and see your actual taxable profit — then compute SE tax, federal income tax, state estimate, quarterly payment, and the set-aside percentage that keeps you out of trouble.
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Multi-platform reseller tax calculator. Enter income per platform (eBay, Etsy, Poshmark, other), COGS, fees, filing status, and state — get taxable profit, SE tax, federal + state estimate, quarterly payment, and the set-aside percentage to save per sale.
- ✗No per-platform income entry. Resellers use multiple platforms. eBay, Etsy, Poshmark, and others all issue separate 1099-Ks. Most tax calculators have one 'self-employment income' field — no breakdown, no reconciliation.
- ✗COGS is ignored. The most important deduction for resellers is what they paid for their inventory. Generic SE tax calculators never ask for it, so they wildly overstate taxable income.
- ✗Platform fees require manual lookup. Knowing your actual fees requires pulling reports from each seller hub. Most calculators don't offer auto-estimation — resellers are left guessing or skipping the deduction entirely.
- ✗No state tax estimate. Federal SE and income tax is only part of the picture. State income taxes add 3–10% in most states. Ignoring them means under-saving.
- ✗No 'what to set aside' number. The most actionable output for a reseller is: 'For every dollar you collect from a sale, transfer X% to savings.' Almost no tool provides this.
Enter gross sales separately for eBay, Etsy, Poshmark/Depop/Mercari, and other platforms. Useful for reconciling multiple 1099-Ks and understanding which platforms contribute most to your taxable income.
Enter your total cost of goods sold and toggle between auto-estimated platform fees (~13% of gross sales, blended average) or manual entry from your actual seller hub reports. Shipping, packaging, and other expenses have separate fields.
SE tax on 92.35% of profit, SE deduction reducing AGI, federal income tax, and simplified state tax rate for all 50 states. Total tax owed, net after W-2 withholding, and quarterly payment — all in one calculation.
The final output is the most actionable number in reselling: what percentage of every dollar collected to set aside for taxes. Transfer this automatically to a savings account every time you receive a payment and quarterly taxes become automatic.
| Feature | Typical Calculator | Reise Tools |
|---|---|---|
| Per-platform income entry (eBay, Etsy, Poshmark, other) | ||
| COGS deduction field | ||
| Auto-estimated platform fees (blended rate) | ||
| Shipping and packaging expense field | ||
| State income tax estimate (all 50 states) | ||
| W-2 withholding offset | ||
| Set-aside % per sale shown | ||
| SE deduction on AGI shown | ||
| ShowMath with IRC §162 and §1221 citations | ||
| Free with no account required |
Every Reise calculator has a ShowMath panel — expand it and you see the exact formula with your actual numbers substituted in. Not a result. Not a black box. The full derivation, step by step.
The mistake most first-year resellers make is treating tax as a once-a-year problem. It isn't — it's a per-sale problem. The set-aside rate this calculator outputs turns tax from a scramble into a system. Know the percentage, automate the transfer, pay quarterly, and tax season takes 30 minutes instead of 7 hours.
Your 1099-K isn't your taxable income. Enter eBay gross sales, COGS, platform fees, and expenses — get your actual taxable profit, SE tax estimate, and the difference between what eBay reported and what you actually owe tax on.
Compare selling fees across eBay, Etsy, Poshmark, Depop, Facebook Marketplace, and Mercari. Enter sale price, shipping, and item cost — see net proceeds and profit on all 6 platforms side by side with the winner highlighted.
Calculate the exact quarterly estimated tax payment to avoid the IRS underpayment penalty. Computes both safe harbor methods — 100%/110% of prior year tax vs 90% of current year — recommends the lower one, and shows your per-quarter payment schedule.
100+ free calculators. Every result shows the formula. No account required.
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