Gather & import
Save your year-to-date reports. Bring in your eBay items and list missing purchase costs.
Start with one month.THE FREE 2026 EBAY SELLER TAX-PREP GUIDE
A calmer tax season
starts in Q4.
You found it. You sold it.
Now see what you kept.
Item costs. Shipping. Subscriptions. That sourcing trip you meant to write down. Bring the pieces together now, while the details are still fresh.
This free guide shows you what to collect, what to check, and how to organize it all in GrimLister Accounting.
Free guide & checklist. No email required.
For U.S. sellers · Updated October 13, 2026
GrimListerAccounting walkthroughExample data
Accounting
Keep your sales, costs, and profit in view.
OverviewSold itemsExpensesInventoryReportsMore tools
Net profit$5,000.00After recorded costs & expenses
Where your money goes
Sales + buyer-paid shipping$12,000
Refunds, fees & postage− $2,900
Cost of items sold− $3,500
Other business expenses− $600
Item costs + everyday expenses = a clearer view of what you kept.
Your numbers.A little more together.
General U.S. tax-prep education. Federal and state rules and individual circumstances differ. Use this guide to organize your records and questions for a qualified tax professional. The accounting walkthroughs below use illustrative data.
YOUR Q4 GAME PLAN
A little now. A lot less later.
Give yourself one 20-minute bookkeeping appointment each week. Here is where to put that time.
Fill the gaps
Match expenses to receipts. Catch up on mileage and review software renewals.
Close one category at a time.Prepare to close
Plan your December 31 inventory count and ask your preparer about estimated payments.
After year-end, reconcile and export.01
START WITH WHAT YOU ALREADY SOLD
Bring your eBay history with you.
You do not need to rebuild a year of sales by hand to start getting organized.
Your free prep plan
- Save the original reports. Keep your eBay transaction and financial reports in a year-specific folder. Include other marketplaces and cash sales in your books.
- Choose a complete period. January through December is the target for a calendar-year handoff. In Q4, start with year to date and finish after year-end.
- Check the coverage. Compare imported dates and transactions with your source reports. Flag missing periods, duplicates, and unusual refunds.
DO IT IN GRIMLISTERAccounting / Import eBay items
Sign up & bring in my eBay items →Connect eBay and authorize financial reporting. Choose your sold-history range, then select Import active and sold items.
Active listings go to Inventory. Completed sales go to Sold items. Available eBay financial records supply fees, labels, refunds, and account charges.
Keep the browser open during the import. Available history depends on eBay and the range you select.
Sources: IRS: Recordkeeping ↗ · IRS: Publication 583, business expenses and records ↗
GrimListerAccounting walkthroughExample data
Bring your eBay history into Accounting
Start with the listings and sales you already have.
OverviewSold itemsExpensesInventoryReportsMore tools
Import eBay items
Sold history
Current and previous year
Active listings →Inventory
Completed sales →Sold items
Vintage denim jacketSKU DEN-042 · Active on eBay
Where did you get it?
Estate sale
Purchase cost
$12.00
Add purchase costs and sources to either list. Keep the browser open while your import runs.
02
THE COST ONLY YOU KNOW
A sale is revenue. Your costs reveal the profit.
A missing purchase cost can make a good-looking total misleading. Give every sold item its real starting point.
Fill the gaps while you remember.
- Record what you paid and where. Match the item or SKU to its receipt, purchase date, and sourcing notes.
- Document cash purchases. Write down the date, place, items, and total. Keep available seller messages, photos, or payment evidence. Flag missing support for review.
- Allocate a haul consistently. If you split a lot’s total across items, keep a note explaining the allocation. Equal shares may not fit a mixed-value lot.
- Do not turn blanks into zeroes. Use $0 only when the item actually cost you nothing.
DO IT IN GRIMLISTERAccounting / Sold items
Add or edit Where did you get it? and Purchase cost beside each item. For selected items, you can enter a cost per item or use Split total haul cost for an equal allocation.
Review the item’s revenue, fees, label cost, refunds, and other recorded costs to understand its profit.
Sources: IRS: Publication 334, small business tax guide ↗ · IRS: Recordkeeping ↗ · IRS: Publication 583, business expenses and records ↗
GrimListerAccounting walkthroughExample data
Sold items & profit
Every sale. Every cost. What you kept.
OverviewSold itemsExpensesInventoryReportsMore tools
Vintage denim jacketSKU DEN-042 · Sold item example
Where did you get it?
Estate sale
Revenue · includes buyer shipping$87.95
eBay fees− $12.45
Shipping label− $7.50
Purchase cost− $12.00
Item profit
Change the purchase cost to see what you kept. A real $0 cost is valid; a blank means it still needs review.
This example has no refunds, promoted fees, or other item costs. Shared business expenses are counted in business net profit separately.
Try the example above. Change the jacket’s purchase cost from $12 to $20. Item profit falls from $56 to $48. Shared costs like storage and subscriptions reduce your overall business net profit separately.
03
CAPTURE THE EVERYDAY COSTS
The mailers count. So does the tape.
Small business purchases are easy to forget when they live across receipts, inboxes, and card statements.
A useful expense record has five things.
- Date: when the purchase happened.
- Amount and merchant: what you paid and to whom.
- Category: supplies, outside postage, software, storage, or another business cost.
- Business purpose: a plain-language note explaining the purchase.
- Evidence: the itemized receipt or invoice, plus payment support where available.
DO IT IN GRIMLISTERAccounting / Expenses
Choose Add expense, then enter the date, category, description, and amount. Record supplies, postage purchased outside eBay, and your other business expenses.
Keep item purchase costs with the inventory or sold item. Use the Receipt inbox to organize supporting receipt records.
Sources: IRS: Publication 334, small business tax guide ↗ · IRS: Recordkeeping ↗ · IRS: Publication 583, business expenses and records ↗
GrimListerAccounting walkthroughExample data
Business expenses
Record the costs of running your business.
OverviewSold itemsExpensesInventoryReportsMore tools
Date
October 13, 2026
Category
Packing supplies
Description
Mailers and packing tape
Amount
$24.50
Your expense records
Packing supplies · Oct 13$24.50
Postage outside eBay · Oct 12$8.20
Software & subscriptions · Oct 1$29.00
Recorded expenses$61.70
Keep the receipt with the amount, category, and business purpose. Review item costs separately.
Catch duplicates before they add up.
A label already included in imported eBay costs should not also be entered as an outside postage expense. Compare receipts and statements against what is already recorded.
Separate business and personal use.
Flag shared phone, computer, vehicle, and workspace costs. Equipment and mixed-use expenses can need allocation or other tax treatment. Collect the evidence and ask your preparer what applies.
A receipt habit that takes one minute: save the image as 2026-10-13_packing-supplies_24.50, record the category, and add the business purpose while it is fresh.
04
REMEMBER THE TRIP, TOO
Your sourcing run needs a record.
The date, destination, miles, and reason for the trip are easier to capture today than reconstruct in April.
Build a useful mileage log.
- Record each business trip promptly. Include the date, start and end locations, miles, and a specific business purpose.
- Make the note useful. “Inventory pickup at estate sale” explains more than “errand.” Separate any personal portion.
- Keep annual vehicle records. Preserve total, business, commuting, and personal mileage information. Your preparer can confirm which trips qualify and the method to use.
DO IT IN GRIMLISTERAccounting / More tools → Mileage
Enter a trip manually with its date, purpose, start, end, miles, and notes. Or choose Start trip to track while the page stays open.
Review the Trip log alongside the rest of your books. Mileage records are included in the report exports and Accountant Package.
Live trip tracking needs location access and the page to remain open. Logged miles are records for review, not an automatic deduction.
GrimListerAccounting walkthroughExample data
Mileage
Keep sourcing trips with the rest of your books.
OverviewSold itemsExpensesInventoryReportsMore tools
Date
October 13, 2026
Purpose
Sourcing
Start
Storage unit
End
Estate sale
Miles
12.4
Notes
Inventory pickup
Trip log
Oct 13 · Sourcing12.4 mi
Oct 12 · Post office / shipping4.8 mi
05
THE CHARGES THAT KEEP COMING
Give recurring costs a place in your books.
Listing software, storage, and other subscriptions can disappear into the background. Review them before another year rolls around.
Do a 15-minute subscription sweep.
- Check statements and your inbox. List each business subscription, merchant, amount, billing frequency, and next charge date.
- Save the invoice. A recurring entry still needs support. Check price changes, credits, canceled services, and annual renewals.
- Check before adding a rule. Make sure the charge is not already captured in imported eBay account costs or another expense entry.
DO IT IN GRIMLISTERAccounting / More tools → Recurring expenses
Keep my business costs in GrimLister →Create a rule with a name, category, amount, Monthly or Yearly cadence, and next due date.
Use the option to automatically post when due, review due expenses, or choose Post due expenses. Update or pause rules when a service changes.
Sources: IRS: Publication 334, small business tax guide ↗ · IRS: Publication 583, business expenses and records ↗
GrimListerAccounting walkthroughExample data
Recurring Expenses
Keep regular business costs on your radar.
OverviewSold itemsExpensesInventoryReportsMore tools
Name
Listing software
Amount
$29.00
Category
Software & subscriptions
Cadence
Monthly
Next due
November 1, 2026
✓ Automatically post when due
Recurring expense rules
Listing softwareSoftware & subscriptions
$29.00Monthly
Storage unitStorage
$75.00Monthly
Bookkeeping softwareSoftware & subscriptions
$120.00Yearly
06
YOUR DEATH PILE COUNTS, TOO
Know what you still own at year-end.
The inventory you bought and the inventory you sold are not always the same number.
Prepare your December 31 count.
- Count listed stock and unlisted finds in Your Death Pile.
- Record the item or SKU, quantity, documented cost, and storage location.
- Flag damaged, lost, donated, or personally withdrawn items for review.
- Keep beginning inventory, purchases, and ending inventory records consistent with your accounting method.
Under a common inventory method, beginning inventory plus purchases and applicable costs, less ending inventory, determines cost of goods sold. Eligible small businesses may use other permitted methods. Ask your preparer before treating unsold purchases as immediate deductions.
DO IT IN GRIMLISTERAccounting / Inventory
Use Inventory accounting to review what you started with, bought, sold, and still own. Add purchase costs and sources to imported inventory, then compare your records with the physical count.
Sources: IRS: Schedule C instructions, inventory and cost of goods sold ↗ · IRS: Publication 334, small business tax guide ↗
GrimListerAccounting walkthroughExample data
Inventory accounting
See what you started with, bought, sold, and still own.
OverviewSold itemsExpensesInventoryReportsMore tools
Beginning inventory$2,000
Purchases inventory$6,000
Ending inventory$3,000
Beginning inventory + purchases$8,000
Less ending inventory− $3,000
Cost of goods sold$5,000
Simplified example with no other adjustments. Your preparer should confirm the inventory method and tax treatment.
07
FROM YOUR RECORDS TO A USEFUL HANDOFF
Give your accountant more than a sales total.
A clear summary is useful. The item-level records and evidence make it easier to explain.
Review before you download.
- Check the period. A Q4 year-to-date report is a progress check. Finish the full-year review after the remaining transactions are available.
- Resolve missing costs. Review refunds, canceled orders, duplicate expenses, and unusual charges.
- Match payouts to deposits. A payout is cash moving to your bank, not another sale. Note year-end timing differences.
- Reconcile tax forms when they arrive. Compare any 1099-K with the underlying records. Ask the issuer to correct errors; do not add its total to sales already recorded.
DO IT IN GRIMLISTERAccounting / Reports & Accountant Package
Sign up & organize my records →Choose the correct year in Year-end statements and export PDF or Excel.
Open More tools → Accountant Package for a ZIP containing a summary PDF, a six-sheet workbook, CSV records, a receipt index, and stored receipt files.
Review completeness, then share through your preparer’s preferred secure method.
Sources: IRS: Understanding Form 1099-K ↗ · IRS: Personal items and correcting a 1099-K ↗ · IRS: Recordkeeping ↗
GrimListerAccounting walkthroughExample data
Year-end statements
Review the year. Then download your records.
OverviewSold itemsExpensesInventoryReportsMore tools
Sales + buyer-paid shipping$12,000
Refunds, fees & postage− $2,900
Cost of items sold− $3,500
Other business expenses− $600
Net profit$5,000
Accountant Package
PDFSummary report
XLSXWorkbook with six sheets
CSVSold items, expenses, mileage & inventory
FILESReceipt index & stored receipts
Confirm the year, resolve missing costs, and review the packet before sharing.
Gross sales
Payment volume before costs and other adjustments. It does not show what you paid for inventory.
Bank payouts
Transfers after applicable deductions and adjustments. Timing can differ from the sale date.
Business profit
Sales, refunds, item costs, and business expenses together. Your taxable income can still need adjustments.
08
TAKE THE FREE WORKSHEET
Ten steps you can actually check off.
Use this with GrimLister, a spreadsheet, or your existing books. Keep the checklist handy during your weekly catch-up.
FREE WORKSHEET
Download checklist (PDF) ↓Your tax-prep checklist
Check off your next step. Download a clean copy anytime.
0 of 10 steps checked
No signup needed. Your checkmarks stay in this browser when browser storage is available. Completion tracks your tasks, not whether your return is ready to file.
Sources: IRS: Recordkeeping ↗ · IRS: Estimated tax payment dates ↗
MAKE THE CONVERSATION COUNT
Bring the questions with the records.
Your preparer should not have to guess which numbers still need attention.
Add these to your report packet.
- Any tax forms, plus other marketplace or cash sales
- Inventory count and purchase evidence
- Receipts and mileage documentation
- Estimated payments and withholding records
- A short list of missing records and unexplained differences
Five questions worth asking.
- Is my inventory method appropriate and consistent?
- How should I treat equipment and mixed-use costs?
- Have I separated personal-item sales correctly?
- Do I need an estimated payment or withholding adjustment?
- What state or local requirements apply to me?
January 15, 2027
The usual federal estimated-tax deadline for the September–December 2026 payment period, if estimated payments apply to you. Review your situation now; special rules or relief can change deadlines.
Sources: IRS: Estimated tax payment dates ↗
COMMON SELLER QUESTIONS
A few things sellers often wonder.
Do I owe tax if I do not receive a 1099-K?
You may. Taxable income can still be reportable even if no form arrives. Your tax preparer can determine the reporting and filing requirements for your situation.
What if I only sold things from my own closet?
Selling personal belongings is different from buying inventory to resell. A personal item sold at a loss generally does not create taxable income, and that personal loss is not deductible. A personal item sold at a gain can create taxable income. Keep purchase and sale evidence and separate these transactions for your preparer.
Can I deduct everything sitting in Your Death Pile?
Do not assume unsold purchases are an immediate deduction. Inventory and cost-of-goods-sold treatment depends on your accounting method and applicable small-business rules. Count the stock, document its cost, and confirm the treatment with your preparer.
Can I import listings I created directly on eBay?
Yes. Accounting’s Import eBay items workflow brings active listings into Inventory and completed sales into Sold items. You do not need to recreate the listings or run their photos through listing preparation.
Does GrimLister import every expense automatically?
It brings in available connected eBay financial information, including fees, labels, refunds, and account charges. You add purchase costs and business expenses outside eBay, such as thrift-store inventory, packing supplies, and other postage. Review the imported data and keep your supporting records.
Can I download reports for my accountant?
Yes. Year-end statements export to PDF and Excel. The Accountant Package also offers a ZIP with a summary PDF, an Excel workbook, CSV records, a receipt index, and stored receipt files. Review missing costs and incomplete records before relying on the totals.
Does GrimLister file my tax return?
GrimLister organizes bookkeeping records and exports reports. It does not file your return, guarantee deductions, or calculate your final tax liability. Give the reviewed records to your tax professional or use them with your tax-preparation software.
Sources: IRS: Understanding Form 1099-K ↗ · IRS: Personal items and correcting a 1099-K ↗ · IRS: Schedule C instructions, inventory and cost of goods sold ↗
GIVE YOUR NUMBERS A HOME
Keep selling.
Keep your books together.
Import your eBay items. Add purchase costs. Track expenses, mileage, and recurring charges. Download the reports when you need them.
Official sources & a note on this guide
Prepared by GrimLister for U.S. eBay sellers. Tax guidance checked October 13, 2026. Linked IRS publications may show the most recently available tax-year edition; confirm final 2026 instructions when filing. Federal and state rules and deadlines can change.
- IRS: Understanding Form 1099-K ↗
- IRS: Form 1099-K general FAQs ↗
- IRS: Personal items and correcting a 1099-K ↗
- IRS: Schedule C instructions, inventory and cost of goods sold ↗
- IRS: Publication 334, small business tax guide ↗
- IRS: Recordkeeping ↗
- IRS: Publication 583, business expenses and records ↗
- IRS: Estimated tax payment dates ↗
- eBay: Sales tax collection and seller responsibilities ↗
- IRS: Publication 587, business use of your home ↗
- IRS: Publication 463, mileage and travel records ↗
GrimLister provides recordkeeping tools, not tax-return preparation or individualized tax advice. Report completeness depends on available eBay data and the records you add. The walkthroughs use sample records to illustrate the accounting workflow.