Use this page to turn resale profit into a quarterly payment target before the IRS deadlines arrive. It is built for eBay, Poshmark, Mercari, Etsy, and multi-platform resellers who need to estimate taxes from net profit after cost of goods sold, marketplace fees, shipping, refunds, and other real business expenses. If you need one estimate across resale plus other 1099 work, jump to the main side hustle tax calculator.
These ranges are a planning baseline, not a filing answer. They assume a single filer with typical reseller deductions and show why quarterlies should be based on profit after expenses, not gross marketplace payouts.
| Annual net profit | Estimated annual tax | Quarterly target | Why it shifts |
|---|---|---|---|
| $12,000 | $2,800 to $3,400 | $700 to $850 | Often fits a part-time reseller with clean COGS records and moderate deductions. |
| $25,000 | $6,000 to $7,200 | $1,500 to $1,800 | A common range once marketplace sales become consistent and profits stay above hobby level. |
| $45,000 | $10,600 to $12,800 | $2,650 to $3,200 | State tax and a thin-margin inventory mix can move the reserve target noticeably here. |
Quarterly tax is tied to the IRS schedule, not the rhythm of marketplace payouts. Reconcile your resale records before each deadline so the payment is based on current profit instead of stale assumptions from earlier in the year.
| Quarter | Income period | Due date | Reseller review focus |
|---|---|---|---|
| Q1 | Income earned Jan 1 to Mar 31, 2026 | April 15, 2026 | COGS, fees, refunds, shipping, and reserve gap |
| Q2 | Income earned Apr 1 to May 31, 2026 | June 15, 2026 | COGS, fees, refunds, shipping, and reserve gap |
| Q3 | Income earned Jun 1 to Aug 31, 2026 | September 15, 2026 | COGS, fees, refunds, shipping, and reserve gap |
| Q4 | Income earned Sep 1 to Dec 31, 2026 | January 15, 2027 | COGS, fees, refunds, shipping, and reserve gap |
The June, September, and January dates matter just as much as April 15, 2026. Resellers with seasonal inventory swings should expect those later quarters to change.
The fastest way to overpay quarterly tax is to estimate from gross marketplace deposits. Subtract inventory cost, platform fees, shipping you paid, refunds, packaging, mileage, and other deductible business costs first, then estimate from the remaining profit.
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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Marketplace dashboards show gross payouts first, but your estimated payment should come from net profit after COGS, fees, shipping, refunds, and other deductions. Gross sales without expense cleanup will overstate what you owe.
A separate reserve account keeps inventory cash and tax cash from mixing together. For most resellers, every payout is cleaner when a fixed share moves to tax savings before that money gets reused for sourcing.
If a large lot flip or holiday season spikes profit, increase the next payment instead of waiting for filing season. Quarterly estimates work best when they are adjusted as the year changes, not just guessed in January.
Quarterly math gets better as your bookkeeping gets tighter. These are the reseller inputs that most often change the payment amount from one deadline to the next.
Track the purchase price of every sold item, not the entire shelf of unsold inventory. This is usually the largest deduction and the main difference between gross payouts and taxable profit.
eBay final value fees, Poshmark seller fees, Etsy transaction fees, payment processing, promoted listing costs, and refund adjustments all reduce profit and should be included before you estimate a quarterly payment.
Postage you absorb, boxes, labels, tape, sourcing miles, and post-office trips are easy to miss. Missing small recurring expenses can distort quarterly planning over a full year.
Quarterly estimates should reflect what stayed sold. Returns that reverse revenue in a later month can change your reserve target more than expected if you do not update the math before the next due date.
If you expect to owe at least $1,000 in combined federal tax for 2026 after withholding and credits, quarterly estimated payments are usually required. That often applies to active eBay, Poshmark, Mercari, and Etsy resellers once net profit climbs above a few thousand dollars.
A practical starting point is 25% to 30% of net profit, then adjust for your state tax rate, filing status, and how much self-employment income you already have. The more volatile your margins are, the more often you should rerun the calculator instead of relying on one fixed percentage all year.
Possibly, yes. The 1099-K threshold only affects whether a marketplace sends an information form. It does not change whether your resale profit is taxable or whether quarterly payments are required.
Yes. If your strongest sales happen in summer or Q4, later payments can be larger than earlier ones. The key is that your total payments stay close enough to your real annual liability or a safe-harbor target.
Cost of goods sold, platform fees, shipping you absorb, packaging supplies, refunds, mileage, and software are the biggest inputs. Missing COGS or refund data is one of the fastest ways to overpay estimated taxes.
Recommended after you estimate
Use this calculator to set the reserve target, then move into software that can handle Schedule C income, marketplace deductions, and estimated tax planning.
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