Amazon Seller Tax Guide 2026: FBA Income Tax, SE Tax, Sales Tax & Deductions

Amazon Seller Tax Guide 2026: Everything FBA and Third-Party Sellers Need to Know

Selling on Amazon is a business — and the IRS treats it as one. Whether you run a small side hustle or a full-scale FBA operation, your Amazon income is subject to federal income tax, self-employment tax, and (in most states) registration requirements. But the tax code also provides powerful deductions specifically designed for product sellers: Cost of Goods Sold (COGS), FBA fee write-offs, inventory asset management, and Section 179 equipment expensing.

This guide covers the complete tax picture for Amazon sellers in 2026, drawing on IRS Schedule C, IRS Topic 554 (Self-Employment Tax), and IRS Publication 334 (Tax Guide for Small Business). Use the Self-Employment / 1099 Tax Calculator to model your specific net profit and estimated tax bill.

Tax Classification: Are You Self-Employed?

The IRS classifies most Amazon sellers as sole proprietors — self-employed individuals running a business. If you sell on Amazon as an individual or as a single-member LLC (the default for US federal tax purposes), you file Schedule C (Form 1040) to report your Amazon profit or loss. This is true whether you sell via FBA (Fulfillment by Amazon), merchant-fulfilled, or a combination.

Per the IRS, an activity qualifies as a business — rather than a hobby — if your primary purpose is income or profit and you engage in it with continuity and regularity. The IRS applies a nine-factor test when evaluating hobby-vs-business classification; consistent profit-seeking behaviour, professional record keeping, and actual profits in three of five years all weigh toward business classification. Amazon sellers who treat their store as a genuine business and keep records should comfortably meet this standard.

If You've Formed an LLC, S-Corp, or C-Corp

The tax treatment depends on how your entity is taxed — not just its legal form:

• Single-member LLC (default): Taxed as a sole proprietor. File Schedule C. SE tax applies to net earnings. This is the most common structure for Amazon sellers.
• Multi-member LLC (default): Taxed as a partnership. Partners file Schedule K-1; SE tax applies to active members' shares.
• S-Corporation election: File Form 1120-S. You pay yourself a reasonable W-2 salary (FICA applies to the salary only); remaining profit passes through as a distribution not subject to SE tax. This can produce significant SE tax savings once profit exceeds ~$80,000–$100,000. See our LLC vs S-Corp Tax Savings 2026 guide for a full comparison.
• C-Corporation: Taxed at the flat 21% corporate rate. Double taxation on dividends. Rarely optimal for individual Amazon sellers.

For most FBA sellers earning under $80,000 in net profit, a sole proprietorship or single-member LLC filing Schedule C is the simplest and most cost-effective structure. S-Corp elections become worthwhile at higher profit levels where SE tax savings exceed accounting fees (typically $2,000–$5,000 per year for S-Corp compliance).

What Income to Report: Amazon Sales, 1099-K, and Settlement Reports

Amazon sellers must report all business income to the IRS — including sales for which no 1099-K was issued. The IRS is explicit: income is taxable regardless of whether you receive a tax form.

Form 1099-K Thresholds

Amazon issues Form 1099-K to sellers who exceed the reporting threshold:

• 2024 tax year: $5,000 in gross sales (regardless of transaction count)
• 2025 tax year onward: $600 in gross sales — the threshold originally enacted in the American Rescue Plan Act

If your gross sales were below these thresholds, Amazon may not send you a 1099-K — but you are still legally required to report all income on Schedule C. The 1099-K reports gross proceeds, not net profit. It includes the full sale price before Amazon's fees are deducted. Do not confuse your 1099-K total with your taxable income — your actual taxable profit is gross sales minus COGS minus business expenses.

What Counts as Gross Income on Schedule C

Report the total gross sales from your Amazon settlement reports as your Schedule C gross receipts (Line 1). Amazon's fees (referral fees, FBA fees, storage fees, advertising) are then deducted as business expenses — not netted before you report income. This is the IRS-correct approach: report gross, then deduct expenses. Netting fees before reporting income is technically incorrect and could attract scrutiny.

Using Amazon Settlement Reports

Amazon provides monthly settlement reports in Seller Central. These reports show gross sales, Amazon fees, and net proceeds transferred to your bank. Keep all settlement reports — they are your primary income documentation. Many sellers also use third-party accounting tools (A2X, Taxomate, QuickBooks) that automatically parse Amazon settlements into tax-ready category summaries.

COGS: Your Most Powerful Deduction

Cost of Goods Sold (COGS) is the most important deduction for Amazon sellers. Unlike most business expenses, COGS reduces your gross income before self-employment tax is calculated — meaning every dollar of COGS saves you both SE tax (15.3¢) and income tax at your marginal rate.

The COGS Formula (IRS Publication 334, Schedule C Lines 35–42)

The IRS formula for COGS is:

Beginning Inventory + Purchases − Personal Use Withdrawals + Direct Labor + Materials and Supplies + Other Costs − Ending Inventory = Cost of Goods Sold

For most Amazon sellers (product resellers, not manufacturers), it simplifies to:

Beginning Inventory + Net Purchases − Ending Inventory = COGS

Where:

• Beginning inventory = the dollar value of inventory you held at the start of the tax year (January 1). This equals your prior year's ending inventory.
• Purchases = the total cost of all inventory you bought during the year — product cost, import duties, freight-in, and supplier shipping. Do not include the cost of items you withdrew for personal use.
• Ending inventory = the dollar value of inventory you held at December 31, valued at cost (lower of cost or market). You must physically count or account for this.

Why COGS Matters: Dual Tax Savings

A $10,000 COGS deduction for an Amazon seller in the 22% income tax bracket saves:

• SE tax savings: $10,000 × 92.35% × 15.3% = $1,413
• Income tax savings: $10,000 × 22% = $2,200
• Total savings: $3,613 per $10,000 of COGS

This makes tracking your inventory cost — every purchase receipt, every import invoice — one of the highest-ROI activities in your business.

Inventory Valuation Methods

Per IRS Publication 334, you must use a consistent inventory valuation method from year to year. Common methods:

• Cost method: Inventory valued at what you paid for it. Simplest for most resellers.
• Lower of cost or market (LCM): Inventory valued at cost or current market price, whichever is lower. Allows you to write down obsolete or slow-moving inventory.
• FIFO (First In, First Out): Assumes oldest inventory is sold first. Common for sellers with perishable goods or products with expiry dates.

Once you choose a method, you must use it consistently. Changing methods requires IRS approval (Form 3115).

FBA Inventory as a Business Asset

Inventory held in Amazon's warehouses (FBA inventory) is your business asset. It appears on your Schedule C as part of beginning/ending inventory. If Amazon loses or damages your FBA inventory, the reimbursement Amazon pays you is income — but the unreimbursed lost inventory cost is a deductible loss. Keep detailed records of inventory sent to Amazon versus inventory Amazon reimburses you for. Amazon's FBA reimbursement reports in Seller Central are the documentation source.

Deductible Business Expenses for Amazon Sellers

After COGS, you deduct ordinary and necessary business expenses on Schedule C Part II. These reduce net earnings further before SE tax is calculated. The IRS defines deductible expenses as those that are ordinary (common in your industry) and necessary (helpful and appropriate for your business).

Amazon Platform Fees

All fees Amazon charges are deductible business expenses:

• Referral fees: Amazon's commission on each sale (typically 8%–15% of sale price depending on category)
• FBA fulfilment fees: Per-unit pick, pack, and ship fees
• Monthly storage fees: Charged per cubic foot of space used in Amazon's warehouses
• Long-term storage fees: Applied to inventory stored more than 365 days
• Professional selling plan fee: $39.99/month flat fee (Individual plan: $0.99/unit)
• Returns processing fees, disposal fees, removal order fees

All of these flow from your Amazon settlement reports. They are Schedule C Line 10 (commissions and fees) or Line 27a (other expenses).

Advertising: Amazon PPC and External Traffic

All Amazon advertising costs are fully deductible:

• Amazon Sponsored Products, Sponsored Brands, Sponsored Display (PPC advertising)
• Amazon DSP (Demand-Side Platform) ad spend
• External advertising directed to Amazon listings: Google Ads, Facebook/Meta ads, influencer fees, YouTube ads
• Social media management costs for Amazon-related promotion

Advertising costs are deducted on Schedule C Line 8.

Shipping Supplies and Packaging

If you ship merchant-fulfilled orders, your shipping supplies are deductible: boxes, bubble wrap, tape, labels, thermal label printers, and packing materials. Deduct on Schedule C Line 22 (supplies) or Line 27a.

Software and SaaS Tools

Amazon seller software tools are fully deductible business expenses:

• Inventory management software (Inventory Lab, SoStocked, RestockPro)
• Repricing tools (Repricer.com, BQool)
• Keyword research tools (Helium 10, Jungle Scout, Viral Launch)
• Accounting software (A2X, QuickBooks, Xero, Wave)
• Product research and sourcing tools
• Amazon Seller Central premium tools or third-party dashboard subscriptions

Deduct on Schedule C Line 18 (office expense) or Line 27a.

Home Office

If you use part of your home regularly and exclusively for your Amazon business — managing orders, sourcing products, handling customer service — you can deduct it:

• Simplified method: $5 per square foot, maximum 300 sq ft = up to $1,500 deduction
• Actual expense method: The business-use percentage (office sq ft ÷ total home sq ft) of rent, utilities, mortgage interest, homeowner's insurance, and repairs

A dedicated room used as your Amazon office and product storage (if exclusively business use) qualifies. A kitchen table you also use personally does not.

Professional Fees

CPA fees, bookkeeper fees, and tax preparation costs for your Amazon business are deductible (Schedule C Line 17). Legal fees for business matters — contract review, intellectual property filings — are also deductible.

Product Photography and Content Creation

Professional product photography for your Amazon listings is a fully deductible business expense. Video production for listing videos or A+ content, graphic design fees for packaging, and copywriting fees for listing optimisation are all deductible.

Business Insurance

Amazon requires Professional sellers to carry product liability insurance once sales exceed certain thresholds. These premiums are deductible. General business liability insurance is also deductible on Schedule C Line 15.

Section 179: Full Expensing of Equipment in Year of Purchase

Business equipment can be fully deducted in the year of purchase under Section 179 rather than depreciated over multiple years. For 2026, the Section 179 deduction limit is $1,160,000. Qualifying assets include computers, monitors, label printers, barcode scanners, cameras for product photography, shelving and racking in a home warehouse, and vehicles used more than 50% for business. Bonus depreciation also allows immediate 100% expensing of new qualifying property. For most Amazon sellers, any piece of business equipment purchased during the year can be fully deducted in year one.

Self-Employment Tax: How It's Calculated for Amazon Sellers

Self-employment tax is the Amazon seller's version of FICA (Social Security and Medicare taxes). W-2 employees split this with their employer — each pays 7.65%. Self-employed sellers pay both halves: the full 15.3%.

The SE Tax Calculation (IRS Topic 554)

Step 1: Calculate net earnings from self-employment
Net earnings = Schedule C net profit (gross sales − COGS − all business expenses)

Step 2: Multiply by 92.35%
This 92.35% factor (= 100% − 7.65%) accounts for the deductible employer-equivalent portion. You pay SE tax on 92.35% of net earnings, not 100%.

Step 3: Apply the 15.3% rate
SE tax = net earnings × 92.35% × 15.3%

The 15.3% breaks down as:

• 12.4% Social Security tax — applies only up to the Social Security wage base ($176,100 for 2025; adjusted annually)
• 2.9% Medicare tax — applies to all net earnings with no cap
• +0.9% Additional Medicare Tax — applies to SE income above $200,000 (single) / $250,000 (MFJ)

Worked Example: $60,000 Net Amazon Profit

An Amazon seller with $60,000 in Schedule C net profit calculates SE tax as:

• SE tax base: $60,000 × 92.35% = $55,410
• SE tax: $55,410 × 15.3% = $8,478

The 50% SE Tax Deduction

You deduct one-half of your SE tax from adjusted gross income on Form 1040, Schedule 1. Per IRS Topic 554, this above-the-line deduction reduces income tax — it does not reduce the SE tax itself. On $8,478 SE tax, the deduction is $4,239. At a 22% marginal rate, that saves $933 in federal income tax.

The QBI Deduction: 20% Off Qualified Business Income

Amazon product sellers generally qualify for the 20% Qualified Business Income (QBI) deduction. Amazon retail businesses are not Specified Service Trades or Businesses (SSTBs) — the SSTB restriction applies to professions like law, accounting, consulting, and health services, not product sellers. The QBI deduction was made permanent by the One Big Beautiful Bill Act (P.L. 119-21, §70105), eliminating the previous 2025 sunset that had created planning uncertainty.

On $60,000 net profit with the 50% SE deduction ($4,239) and no retirement contributions: QBI ≈ $60,000 − $4,239 = $55,761. QBI deduction = 20% × $55,761 = $11,152 off taxable income. At 22%, that saves $2,453 in federal income tax.

Sales Tax for Amazon Sellers: Marketplace Facilitator Laws

Sales tax is the area where Amazon sellers most often over-worry. The good news for most FBA and third-party sellers: Amazon collects and remits sales tax on your behalf in all 50 US states and the District of Columbia under Marketplace Facilitator laws.

What Marketplace Facilitator Laws Mean for You

Since 2018 (following the Supreme Court's South Dakota v. Wayfair decision), states have enacted Marketplace Facilitator laws that shift the sales tax collection and remittance obligation from the individual seller to the marketplace platform. Amazon qualifies as a marketplace facilitator in every US state. When a customer in California, Texas, New York, or any other state buys from your Amazon listing, Amazon calculates, collects, and remits the appropriate state and local sales tax. You generally do not need to:

• Register for a sales tax permit in states where you only sell through Amazon
• Calculate sales tax on Amazon transactions
• File individual state sales tax returns for Amazon sales
• Remit sales tax collected on Amazon orders to state revenue departments

When You May Still Have Sales Tax Obligations

Despite Amazon handling collection and remittance, some situations create additional complexity:

• Your own website or other channels: If you sell through your own Shopify/WooCommerce store, eBay (which also has marketplace facilitator status), Etsy (also a facilitator), or other non-facilitator channels, you have separate nexus and registration obligations for those sales.
• Economic nexus in your home state: Some states require sellers to register even if the marketplace collects tax, particularly your home state where you have physical presence nexus by definition. Consult a state tax professional for your specific home-state requirements.
• Physical presence in multiple states: If you have employees, offices, or significant property in multiple states, you may have physical presence nexus triggering registration requirements beyond Amazon's facilitator coverage.
• FBA inventory nexus (state-specific): Amazon stores inventory in fulfillment centres across the US. Some states consider the physical presence of your inventory in their state to create nexus, potentially requiring registration even when Amazon collects tax. This is a rapidly evolving area of state tax law — the majority of states exempt marketplace sellers from individual registration when the facilitator remits, but a few states have nuanced rules. Consult a tax professional familiar with Amazon-specific nexus rules if you operate at significant scale.

Records to Keep for Sales Tax Compliance

Even though Amazon remits for you, keep records: Amazon provides a monthly sales tax report in Seller Central showing tax collected and remitted by state. Retain these reports — they document that tax was properly collected and are useful if your state ever queries your compliance.

Quarterly Estimated Taxes: Deadlines and Calculation

As a self-employed Amazon seller, federal income tax and SE tax are not withheld from your Amazon payouts. You are responsible for making quarterly estimated tax payments to the IRS throughout the year. Failure to pay sufficient estimated taxes results in an underpayment penalty (currently calculated at the federal short-term rate plus 3%).

When Estimated Taxes Are Required

You must make quarterly estimated payments if you expect to owe at least $1,000 in federal tax for the year after subtracting withholding and credits. For most Amazon sellers running a profitable operation, this threshold is easily exceeded.

2026 Quarterly Estimated Tax Due Dates

How Much to Pay Each Quarter

You can avoid the underpayment penalty using either of two safe harbour methods:

• 100% of last year's tax liability: If you pay at least 100% of your prior year's total tax (110% if prior year AGI exceeded $150,000), you avoid the penalty regardless of what you owe at filing. This is the simplest approach for sellers whose income fluctuates.
• 90% of current year's estimated tax: Estimate your full-year net profit each quarter and pay 90% of the estimated annual tax in four equal instalments. This is more accurate but requires quarterly profit projections.

Most Amazon sellers use the safe-harbour method (pay 100%/110% of last year's tax) in Q1–Q3, then true up in Q4 once the year's actual profit is clear.

How to Pay

The IRS Electronic Federal Tax Payment System (EFTPS) at eftps.gov is the standard method for quarterly payments. You can also pay via IRS Direct Pay (directpay.irs.gov), credit/debit card through IRS-authorized processors, or by mail with Form 1040-ES vouchers.

State Estimated Taxes

Most states with an income tax also require quarterly estimated payments. Due dates typically mirror federal due dates. Check your state's revenue department for the specific amounts and forms required.

Record Keeping: What Amazon Sellers Must Retain

Good record keeping is the foundation of accurate tax filing and the best protection in the event of an IRS inquiry. The IRS requires you to keep records that support all income reported and deductions claimed on your return. Per IRS Publication 334, retain business records for at least three years from the date you file the return (or two years from the date you paid the tax, whichever is later). Retain records related to property (including inventory) for three years after you dispose of the property.

Essential Records for Amazon Sellers

Income documentation:

• Amazon monthly settlement reports (download and archive from Seller Central)
• Form 1099-K issued by Amazon (if received)
• Records of any other Amazon income: reimbursements, damage claims, refund adjustments

Inventory and COGS records:

• Purchase receipts and invoices for all inventory bought during the year (from suppliers, Alibaba, distributors, liquidators)
• Import documents, freight invoices, customs duties paid
• Year-end inventory count documentation (physical count or inventory management software export)
• Beginning-of-year inventory value (your prior December 31 count)
• Amazon FBA inventory reports showing units sent, sold, damaged, and reimbursed

Business expense records:

• Software subscription receipts (annual invoices from Helium 10, Jungle Scout, A2X, etc.)
• Amazon advertising invoices and campaign reports
• Professional photography invoices
• CPA/bookkeeper invoices
• Business insurance premium statements
• Equipment purchase receipts (for Section 179 claims)
• Home office documentation: floor plan showing office area, total home square footage

Recommended tools: Many Amazon sellers use dedicated bookkeeping software (A2X + QuickBooks or Xero) that automatically categorises Amazon settlement data. This produces clean monthly P&L statements, simplifies COGS tracking, and generates the reports your CPA needs at tax time. The cost of such software ($30–$100/month) is itself a deductible business expense.

Worked Example: Full Tax Calculation for an Amazon FBA Seller

Let's work through a complete 2026 federal tax calculation for an Amazon FBA seller — a single filer selling private label supplements with $150,000 in gross sales.

Step 1 — Schedule C Income and COGS

Step 2 — Schedule C Business Expenses

Schedule C Net Profit: $90,000 − $40,400 = $49,600

Step 3 — Self-Employment Tax (Schedule SE)

• SE tax base: $49,600 × 92.35% = $45,806
• SE tax: $45,806 × 15.3% = $7,008
• 50% SE deduction (Schedule 1): $3,504

Step 4 — Adjusted Gross Income

Step 5 — Taxable Income

Step 6 — Total Federal Tax

Without tracking COGS and claiming all deductions, the same seller paying tax on the full $150,000 would face a dramatically higher bill. Proper COGS tracking and expense deductions reduced taxable profit from $150,000 to $49,600 — and further deductions brought federal taxable income to under $10,000. State income tax applies separately. Use the Self-Employment / 1099 Tax Calculator to model your specific figures.