How to File Poshmark Taxes: What, When, & How

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Poshmark enables over 100 million users to buy and sell new and used clothing, home goods, and electronics. While some Poshmark sellers use the platform casually, others sell enough to make it a side gig, meaning they're now side-hustle resellers rather than hobbyists. Selling a handful of used items from your closet may not create major tax obligations, but regular Poshmark resellers should understand how and when marketplace income is reported in 2026.

Use this blog article as your comprehensive guide to Poshmark taxes, from people selling personal items to self-employed gig-style individuals running a business. It covers important taxes you must file, sales tax considerations, essential tax forms you'll need to prepare and file your taxes, and tax write-offs you can take to reduce your taxable income. If the process feels overwhelming, a dedicated accountant is ready to help you track income, maximize deductions, and stay compliant.

Key Takeaways

  • Poshmark sellers may owe taxes depending on how often they sell and whether they make a profit.

  • Casual sellers typically report gains or losses from personal sales.

  • Regular resellers may be considered self-employed and must file Schedule C (Form 1040), Profit or Loss from Business (Sole Proprietorship).

  • Platforms like Poshmark may issue Internal Revenue Service (IRS) Form 1099-K, Payment Card and Third Party Network Transactions, when reporting thresholds are met.

  • Self-employed Poshmark business owners qualify for reseller tax deductions that reduce their taxable income.

What Poshmark Taxes Must You File?

File taxes based on how you use the Poshmark platform. Learn about the tax forms and information you'll need for your Poshmark seller category in the following sections.

Taxes When Selling Personal Items on Poshmark

If you rarely sell personal items on Poshmark for a loss, perhaps once or twice a year, that income isn't taxable, but gains are. For example, if you sold a used piece of clothing or another personal item for less than you paid when the items were new, which is relatively common in the secondhand market, you won't owe any tax on that transaction. If that same piece of clothing sells for more than what you paid, you generally owe tax.

Whether you sold a used item for a profit or a loss, it is a best practice to report the sale on your tax return. Use Schedule 1 (Form 1040), Additional Income and Adjustments to Income, to report a loss, and IRS Form 8949, Sales and other Dispositions of Capital Assets, and Schedule D (Form 1040), Capital Gains and Losses, to report a gain from your personal Poshmark sales.

If you're having difficulty preparing and filing your Poshmark taxes, 1-800Accountant's personal income tax preparation and filing solution can help.

Taxes When Poshmark Is Your Hobby

Hobby vs. business taxes. Determining the line between a business and a hobby can be difficult, but the IRS offers several factors to help you make that distinction, including:

  • Whether you carry on your Poshmark activities in a businesslike manner and maintain complete and accurate books and records.

  • Whether you have personal motives for selling on Poshmark.

  • Whether the time and effort you put into Poshmark selling indicates you intend to make it profitable.

  • Whether you depend on Poshmark income for your livelihood.

  • Whether your losses from selling secondhand items are due to circumstances beyond your control.

  • Whether you or your advisors have the knowledge necessary to carry on Poshmark sales as a successful business.

  • Whether you were successful in making a profit in similar activities in the past.

  • Whether Poshmark selling makes a profit in some years and how much profit it makes.

  • Whether you can expect to make a future profit from the appreciation of the assets used while selling on Poshmark.

If you've determined that you are operating as a hobby on Poshmark, you will owe state and federal taxes on any income you've received. However, you will not be considered a business, which exempts you from claiming tax deductions and being responsible for associated taxes, including the 15.3% self-employment tax. Poshmark hobbyist sellers typically use Schedule 1 to report income.

When managing your Poshmark hobbyist taxes is challenging, save time with 1-800Accountant's affordable personal income tax preparation and filing service.

Running a Poshmark Retail Business

Selling on Poshmark as a self-employed individual comes with increased tax responsibilities compared to selling only occasionally as a hobby. Many resellers are sole proprietors for tax purposes due to the ease of operation and general lack of paperwork.

You'll use Schedule C to report your Poshmark business income and expenses. Schedule C calculates taxable income for your Form 1040, U. S. Individual Income Tax Return, which must be attached when you submit it to the IRS.

You'll also pay self-employment tax. The 15.3% self-employment tax funds Social Security and Medicare. In addition to this tax, you're responsible for calculating and paying quarterly estimated taxes four times annually. Determine your self-employment tax burden by using Schedule SE (Form 1040), Self-Employment Tax.

Quarterly estimated tax payment due dates for the 2026 calendar year include:

  • April 15th

  • June 15th

  • September 15th

  • January 15th, 2027

Use IRS Form 1040-ES, Estimated Taxes for Individuals, to calculate and pay taxes four times annually. The form includes payment vouchers and instructions for filing online.

If you struggle to make accurate calculations by each deadline for your Poshmark business, our full-service quarterly estimated tax solution will pick up the slack.

Sales Tax and Poshmark

US-based Poshmark sellers are not responsible for collecting, calculating, or remitting sales tax under marketplace facilitator laws. These laws extend to other platforms, including Amazon, Etsy, and eBay. The Poshmark platform typically makes these calculations and collections automatically, but that doesn't necessarily indicate you have no sales tax responsibilities. For example, you may still be responsible for submitting a sales tax return.

The Poshmark buyer's city and state determine the sales tax associated with each order.

Reporting Poshmark Taxes: What Forms Do You Need?

Whether you infrequently use Poshmark to sell personal items, use the platform as a hobby, or sell there regularly as a business, these are some of the forms and materials you may need to complete and file your taxes.

  • IRS Form 1040. File Form 1040 to report taxable income and calculate your tax liability for the year. This form is typically due by April 15th.

  • Schedule 1. Use Schedule 1 to report personal or hobbyist income you receive from Poshmark sales. Attach this and other supplemental materials to Form 1040.

  • Schedule C. Report your income on Schedule C. Schedule C reports your self-employment income and business tax deductions.

  • Schedule D. Use Schedule D to report a gain from a personal Poshmark sale. This form is typically used with IRS Form 8949.

  • Schedule SE. Use Schedule SE to report your income and calculate the self-employment tax. You’ll also need to pay income taxes, but you can deduct half of your self-employment tax liability.

  • IRS Form 8949. Form 8949 should be used to report personal Poshmark sales. This form is typically used with Schedule D.

  • IRS Form 1099-K. The platform will prepare and send a Poshmark 1099-K to you and the IRS by January 31st. You will not submit Form 1099-K to the IRS. Instead, you will use this information to help determine your tax liability by applying it to your Schedule C on IRS Form 1040.

Poshmark Tax Deductions and Write-Offs

Tax deductions for individuals who sell on Poshmark as a business can lower their taxable income. Sellers who offer personal items infrequently on the platform or as a hobby are ineligible to claim deductions. Consider the following deductions and make sure to keep detailed records supporting each deduction you intend to take.

  • Inventory & supplies. The purchase price of items sold on Poshmark, along with storage fees and costs associated with cleanup or repair, is a deductible expense.

  • Shipping & packaging. Packaging and shipping costs can be recorded and claimed as business expenses. Poshmark shipping costs are typically included in the fee or commission they charge, depending on the item's value and weight.

  • Platform fees. The commissions or platform fees Poshmark charges are deductible expenses. Some charges are flat dollar amounts, while others are a percentage of your sale.

  • Marketing expenses. Marketing is crucial to attracting clients and establishing your Poshmark business. Most marketing costs can be claimed as tax-deductible expenses. Business marketing expenses are deductible as long as they serve an advertising purpose rather than a personal one. If you buy something for your marketing initiatives, it is an asset you have purchased that can be depreciated over time.

  • Home office. If you run your business out of your home, you might be able to deduct a portion of your housing costs as business expenses. To qualify, you must have an accountable plan and designate an area of your home for business purposes only. The home office deduction will then allow you to deduct a portion of your rent, utilities, mortgage, and other housing-related costs corresponding to the portion of your home used for your business. The office space must be your principal and regular place of work, and you should be able to support your claim with clear documentation, including its square footage.

  • Professionalfees and commissions. If you've used the legal services of a lawyer, a virtual accountant for tax preparation, or other professional services for your Poshmark business, those fees are usually tax-deductible because they are a normal part of doing business. This also applies to fees you may pay for membership in certain professional networks or organizations. Those costs are tax-deductible if your membership or subscription is entirely used for business purposes.

  • Miscellaneous business expenses. Telephone, internet, and other costs related to your office that are necessary for your work are typically deductible. If you also use your phone and internet for personal use, deduct the portion used solely for conducting business on Poshmark.

The Easy Way to File Poshmark Taxes with Expert Support

Preparing and filing your Poshmark taxes throughout the year can be difficult and time-consuming, especially while running your day-to-day sales operations. This can lead to mistakes or missed deadlines, resulting in costly penalties and unwanted IRS attention. Ensure year-round compliance and smoother operations with professional accounting support from the experts at 1-800Accountant, America’s leading virtual accounting firm.

When you trust 1-800Accountant with your Poshmark tax work, you get:

  • A dedicated accountant experienced in working with ecommerce clients

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  • Tax deduction selection and maximization

Our affordable, tax-deductible solutions ensure your self-employed Poshmark business remains compliant year-round. Schedule a quick 30-minute consultation to learn more and get started.