Whether you resell on eBay, Poshmark, Mercari, Etsy, or multiple platforms, this calculator estimates your 2026 self-employment tax, federal income tax, and quarterly payment targets based on your net profit after cost of goods sold and deductible expenses.
These ranges show estimated total tax burden at common net profit levels. Your actual figure depends on COGS accuracy, deductible expenses, filing status, and state taxes. Use the table to pressure-test your reserve, then run the calculator with your own numbers.
| Net resale profit | Estimated total tax | Quarterly target |
|---|---|---|
| $8,000 | $1,350 to $1,800 | $340 to $450 |
| $20,000 | $3,900 to $5,100 | $975 to $1,275 |
| $45,000 | $10,100 to $12,900 | $2,525 to $3,225 |
Net profit = gross resale revenue minus COGS, platform fees, shipping absorbed, and other deductible business expenses. Ranges assume single filer with no other income.
Start with your total sales across all platforms, then subtract the cost of inventory (COGS), platform selling fees, shipping you paid, packaging materials, and any other ordinary business expenses. The result is the number you enter into the calculator — not your gross sales total.
Estimated tax on side hustle profit
$2,687.29
Profit after deductions: $13,323.00
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
Before you file
Set aside $671.82 each quarter so this estimate does not become a deadline surprise.
Tax filing handoff
Use the calculator to set your target, then move into a filing flow built for Schedule C income, self-employment tax, quarterly payments, and common 1099 forms.
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Reseller taxes are manageable when COGS records are clean and quarterly estimates are updated as inventory moves. The biggest planning risk is underestimating net profit by forgetting items that sold fast, or overestimating deductions on items that were listed but not sold yet. Run the calculator with your best current estimate, compare the quarterly target to the 2026 estimated tax due dates, and adjust your reserve after each platform payout cycle. For a full list of deductions available to resellers, see the side hustle tax deductions guide.
Cost of goods sold is usually the biggest deduction a reseller can claim. Log purchase price, date, and source for every item at the time of purchase — reconstructing records at tax time is error-prone and may cost you legitimate deductions.
A dedicated bank account or credit card for reselling keeps platform fees, shipping costs, and supply purchases from mixing with personal spending. Clean records make quarterly estimates faster and more accurate.
Resale volume often spikes seasonally — holiday sourcing, estate sale season, or a single large lot purchase can shift your tax picture significantly. Update your estimate before each quarterly due date rather than relying on a single year-start projection.
Yes. If your net profit from reselling exceeds $400 in a year, the IRS treats you as self-employed and you owe self-employment tax (15.3% on the first $176,100 of net earnings in 2026) plus federal income tax on the remaining amount after deductions.
Yes. The cost of goods sold (COGS) — what you paid to acquire inventory — is deductible against resale revenue. Accurate purchase records, receipts, and sourcing logs are essential because COGS is often the largest deduction a reseller can claim.
For tax year 2026, payment platforms like eBay, Poshmark, Mercari, and PayPal are required to issue a 1099-K when gross payments reach $2,500 or more in a year. Receiving a 1099-K does not change your tax obligation — all net profit is taxable regardless of whether a form is issued.
Platform fees (eBay final value fees, Poshmark seller fees, Etsy transaction fees), shipping costs you absorb, packaging supplies, storage space used exclusively for inventory, and mileage driven to source or ship items are all commonly deductible as ordinary and necessary business expenses.
Use the calculator above with your estimated net profit for the year (gross sales minus COGS and deductible expenses). Divide the resulting tax figure by four for a rough quarterly payment target. The 2026 due dates are April 15, June 16, September 15, and January 15, 2027.
Keep receipts or logs for every item purchased (date, cost, source), all selling fees and platform statements, shipping and packaging costs, mileage records if you drive to thrift stores or pick up inventory, and storage or home-office documentation if applicable.
Recommended for resellers
TaxSlayer Self-Employed walks through COGS, platform fees, and deductions step by step. Re-run your calculator estimate before each quarterly due date so your reserve stays accurate.
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