Use eBay-specific defaults for marketplace fees, track the inventory you actually sold, and pressure-test your quarterly payment target before the IRS notices your side income first.
Estimated tax on taxable eBay profit
$956.67
Profit after deductions: $4,743.00
Next four due dates
Q1 due April 15, 2026
Income earned Jan 1 to Mar 31, 2026
Q2 due June 15, 2026
Income earned Apr 1 to May 31, 2026
Q3 due September 15, 2026
Income earned Jun 1 to Aug 31, 2026
Q4 due January 15, 2027
Income earned Sep 1 to Dec 31, 2026
eBay filing help
Use this estimate as the shock number, then move into a filing flow built for Schedule C income, marketplace fees, mileage, and quarterly payments.
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Your cost of goods sold is the amount you paid to acquire the inventory that actually sold during the year. For most resellers, that means sourcing costs for sold units, not the full value of every item still sitting on shelves.
Use shipping supplies, software, and mileage as separate deductions so your inventory cost stays clean.
The calculator starts with eBay’s standard 13.25% final value fee, then lets you override it. If you run promoted listings, pay store subscription charges, or sell in categories with different fee schedules, raise the fee line or move the extra software costs into subscriptions.
Conservative estimates help prevent underpaying quarterly taxes when payout fees drift higher.
Marketplace reporting thresholds can phase in and change, but taxable eBay profit is still reportable whether or not you receive a Form 1099-K. Treat this page as a planning tool, then match your estimate against payout reports, refund data, and actual expenses before filing.
Start with gross sales, then remove real business costs before taxes. A reseller at $20,000 in gross sales might report:
Your numbers will differ, but this is why gross sales alone is the wrong tax signal.
Move 25% to 30% of each payout into a dedicated tax account. Do this weekly so a strong month does not create a surprise at quarter end.
Update COGS, fees, returns, and mileage in the calculator. Payment amounts can change and still remain compliant if you catch up during the year.
Holiday volume and promoted listing spend can spike quickly. Conservative Q4 inputs reduce underpayment risk when margins tighten.
This usually overstates what you owe and leads to bad cash-flow decisions.
You lose clean records and miss deductible expenses that could lower both SE and income tax.
Quarterly planning works best when updated during the year, not after penalties are already triggered.
Yes. Taxable business income is still reportable even if no 1099-K arrives. The form is an information report, not the rule that creates tax liability.
Most sellers start by reserving 25% to 30% of net profit after deductions, then adjust each quarter as real sales and expense data replaces estimates.
No. Keep shipping supplies in their own expense line and keep COGS limited to inventory that actually sold during the tax year.
If your activity is a real business and records are solid, losses may offset other income. Hobby-style activity is treated differently and has tighter limits.
Most solo sellers file Schedule C for profit/loss and Schedule SE for self-employment tax, both attached to Form 1040.
Ready to file
After you have the estimate, move into a filing flow built for Schedule C income, marketplace fees, mileage, and quarterly payments.
This site may earn affiliate commissions from links on this page. We only recommend software we'd use ourselves.