Selling on Amazon is running a real business, and the IRS treats it that way. Whether you fulfill through FBA, ship orders yourself, or sell across multiple channels, every dollar of revenue carries tax obligations at both the federal and state level.
Amazon seller taxes come down to two different systems: income tax and sales tax. Each has its own rules, deadlines, and penalties for getting it wrong. If you are doing six, seven, or eight figures in annual revenue, the stakes are real. A missed state registration, a misreported 1099-K, or sloppy expense tracking can cost you thousands in penalties or overpaid tax. And while Amazon collects sales tax in most states on your behalf, that does not mean your compliance work is finished.
This guide explains what you owe, where you owe it, which forms to file, what you can deduct, and how to stay audit-ready all year. It is written for sellers who want clear, specific answers rather than vague reassurance.
Tax is the area where good advice pays for itself fastest. If you would rather have a specialist handle the filing and the strategy, our ecommerce tax preparation service keeps Amazon sellers accurate, compliant, and paying no more than they should.
Start With The Two Tax Systems You Must Manage
Selling on Amazon means managing two separate tax systems. Federal income tax applies to your profits and goes to the IRS. State sales tax applies to what your customers pay at checkout and goes to individual state revenue departments. Marketplace facilitator laws shift some sales tax duties to Amazon, but not all of them.
Sales Tax Vs. Federal Income Tax
Sales tax is a consumption tax charged to the buyer at the point of sale. It is calculated as a percentage of the sale price, varies by state and local jurisdiction, and must be remitted to the correct authority. You are not paying it from your profits. You are collecting it for the state, or Amazon is collecting it for you.
Federal income tax is different. It is based on your net profit, which is total revenue minus allowable business expenses. The IRS expects you to report all income from your Amazon business, with or without a 1099-K. If you are a sole proprietor, you also owe self-employment tax, currently 15.3 percent, on top of your regular income tax. Put simply, sales tax is about where your customers are and what they buy, while income tax is about how much money you made after expenses.
What Marketplace Facilitator Rules Change
Marketplace facilitator laws require Amazon to collect and remit sales tax on orders placed through its marketplace. As of 2026, nearly every sales tax state has adopted this rule. Amazon calculates the correct rate, collects the tax from your buyer, and sends it to the state. For most sellers, that removes the need to calculate rates, collect the tax, or remit it for marketplace sales.
There is a limit, though. Facilitator laws apply only to sales made through the marketplace. If you also sell on your own website, through another channel, or at trade shows, those sales are yours to tax correctly. The facilitator law covers only the platform transaction.
Why Amazon Handling Collection Does Not End Your Duties
Even in states where Amazon collects and remits, you may still need to register for a sales tax permit where you have nexus. Many states require registration even when a facilitator is collecting on your behalf, and some require periodic filings from registered sellers, even when the return shows zero tax due. Failing to file can trigger penalties or late fees.
You also have to track your nexus exposure as your FBA inventory locations and sales volumes change over time. A state with no obligation last year could require filing this year. Amazon’s role covers collection and remittance. It does not cover your registration, your filing obligations, or your responsibility to monitor where nexus exists.
When Nexus Creates State Filing Responsibilities
Nexus is the legal connection between your business and a state that triggers a tax obligation. For Amazon sellers, it usually comes from holding physical inventory in a state or exceeding that state’s sales threshold. Once nexus exists, you are generally required to register, file returns, and stay compliant with that state’s rules, even when Amazon handles the tax collection.
Physical Nexus From FBA Inventory And Operations
Physical nexus means your business has a tangible presence in a state, and for FBA sellers the most common trigger is inventory storage. When you send products into Amazon’s fulfillment network, Amazon distributes your inventory across multiple warehouses, and you do not choose which states it lands in. If your inventory sits in a fulfillment center in a state, you have physical nexus there, even if you have never set foot in it and have no employees there.
Other triggers include a home office, a warehouse, employees, or contractors in a state. For most FBA sellers, it is inventory placement that creates multi-state exposure. You can check where your inventory is stored by pulling the Inventory Event Detail Report or the Fulfillment Center report from Seller Central. Review it regularly, because Amazon moves your stock without notice.
Economic Nexus From Sales Thresholds
Economic nexus is based on your sales volume or transaction count in a state, with no physical presence required. After the 2018 South Dakota v. Wayfair Supreme Court decision, most states adopted economic nexus thresholds. The most common is $100,000 in annual sales or 200 transactions shipped to customers in that state, though exact numbers vary, and it applies to both FBA and FBM sellers.
Ship enough orders into a state and you cross the threshold, creating nexus regardless of where your inventory sits. These thresholds reset annually in most states, so monitor your sales by state throughout the year. Crossing one mid-year can create an obligation for the rest of that year and the next.
Sales Tax Permits, Registration, And Filing Expectations
Once you determine you have nexus in a state, the typical sequence is to register for a sales tax permit with that state’s department of revenue before you begin collecting. Collecting sales tax without a permit is illegal in many states. States then assign you a filing schedule, monthly, quarterly, or annually, based on your sales volume, with higher-volume sellers filing more often.
File on time, even when Amazon collected the tax. Many states still require a return, even if it reports zero seller-collected tax, and failing to file can result in estimated assessments, late fees, or loss of your permit. Keep records of your nexus analysis, documenting which states you have nexus in, when it was established, and when you registered. If a state ever questions your compliance, that documentation is your first line of defense.
Multi-state registration and filing is where a lot of sellers lose time and sleep. Our ecommerce sales tax services handle the tracking, registration, and filings so nothing slips through as you grow.
How To Report Amazon Income Correctly
Every dollar that flows through your Amazon account is potentially reportable income. The IRS expects you to report gross amounts and then subtract allowable deductions. The forms you use depend on your business structure, and reconciling what Amazon reports against what you actually earned is one of the most important steps in accurate filing.
What Form 1099-K Actually Reports
Amazon issues Form 1099-K to sellers whose gross payments exceed $20,000 and who have more than 200 transactions in the calendar year. This is the current federal threshold after the previously planned $600 threshold was rolled back, so not every seller receives a form. Even if you fall below it and get no 1099-K, you are still required to report all of your income.
The 1099-K reports gross payments, not your profit. It includes the full sale price of every item, shipping charges, sales tax collected, and any other amounts processed through your account. It does not subtract Amazon fees, refunds, returns, advertising costs, or cost of goods sold. The number on your 1099-K will almost always be higher than the money you actually received, so reporting that figure as income without adjustments means overpaying your taxes. You can find your 1099-K in the Tax Document Library inside Seller Central, typically by January 31. The IRS receives a copy too, so the numbers on your return need to match or clearly reconcile.
Which Tax Forms Apply To Your Business Structure
The form you use depends on how your business is structured. Sole proprietors and single-member LLCs file Schedule C (Profit or Loss from Business) attached to Form 1040, and owe self-employment tax on net profit, calculated on Schedule SE. Partnerships and multi-member LLCs taxed as partnerships file Form 1065 and issue a Schedule K-1 to each partner, who reports their share on their personal return.
S-Corporations file Form 1120-S and issue K-1s to shareholders, and owner-employees must be paid a reasonable salary, which reduces but does not eliminate self-employment tax exposure. C-Corporations file Form 1120, pay tax at the corporate rate, and see distributions taxed again at the individual level.
If your net profit is high enough that self-employment tax is a real burden, an S-corp election could lower your overall bill. This is a decision worth making with ecommerce business structure and advisory support rather than guessing at the timing.
Reconciling Gross Payments To Taxable Income
The gap between your 1099-K gross and your actual taxable income can be large, and reconciliation bridges it with documentation. Start with the gross payments reported on the 1099-K, then subtract:
Sales tax collected, which is not your income and was collected for the states.
Amazon fees, including referral fees, FBA fees, storage fees, and subscription fees.
Refunds and returns that reduced your actual revenue.
Shipping costs that Amazon collected and then charged back to you.
Cost of goods sold, meaning what you paid for the products you sold.
What remains after those subtractions is close to your true net revenue. From there, subtract additional operating expenses to arrive at taxable profit. If you do not reconcile, the IRS sees the full 1099-K amount and expects you to explain the difference. A well-organized reconciliation, backed by your Amazon reports and accounting records, keeps you accurate and audit-ready.
You should also make quarterly estimated tax payments using Form 1040-ES if you expect to owe $1,000 or more for the year. Miss these and you can face underpayment penalties, even if you pay everything by April 15.
The Expenses And Inventory Records That Matter Most
Accurate expense tracking separates sellers who overpay from those who keep more of their profit. Every legitimate business expense reduces your taxable income, but you need proper records to claim the deductions. For Amazon sellers, inventory accounting and fee categorization take more attention than they do in most small businesses.
Cost of Goods Sold vs. Operating Expenses
Cost of goods sold (COGS) covers every direct cost of acquiring or manufacturing the products you sell, including the purchase price of inventory, inbound shipping to Amazon warehouses, customs duties, and manufacturing or labeling costs. COGS is subtracted from gross revenue to calculate your gross profit.
Operating expenses are the costs of running the business beyond the products themselves, such as Amazon referral fees, FBA fulfillment fees, advertising, software subscriptions, office supplies, and professional services. These are subtracted from gross profit to reach your net profit, which is the basis for your income tax.
COGS is tied directly to inventory. You can only deduct the cost of products you actually sold during the tax year, not products still in storage. If you purchased $50,000 in inventory but only sold $35,000 worth, your COGS deduction is based on the $35,000 sold. The remaining $15,000 stays on your balance sheet as inventory until it sells.
Common Deductions for Amazon and Multi-Channel Sellers
Amazon fees are often your largest expense, including referral fees (typically 8 to 15 percent of the sale price), FBA pick-and-pack fees, storage fees, long-term storage fees, and your Professional Seller subscription.
Advertising spend on Amazon PPC campaigns, Sponsored Products, Sponsored Brands, and any off-Amazon advertising is deductible.
Shipping costs for inbound shipments to FBA, outbound shipping for FBM orders, and return shipping all qualify.
Software and tools such as inventory platforms, repricing tools, keyword research, and accounting software are business expenses.
Home office deduction applies if you use a dedicated space in your home exclusively for your Amazon business. You can use the simplified method ($5 per square foot, up to 300 square feet) or the regular method based on actual expenses.
Professional services, including accounting, bookkeeping, tax preparation, and legal fees, are deductible.
Product photography, graphic design, and branding costs are deductible in the year incurred.
Inventory Timing, Reimbursements, and Clean Books
You must use a consistent method, and FIFO is the most common, to determine which units were sold and at what cost. Changing methods without IRS approval creates compliance issues.
Amazon reimbursements for lost or damaged inventory are taxable income. When Amazon reimburses you for a lost unit, that payment appears in your settlement reports and must be recorded as revenue. Many sellers overlook these, which creates discrepancies during reconciliation.
Clean bookkeeping means categorizing every transaction as it happens. Your books should reflect the flow from gross sales to net deposits, with every Amazon fee, refund, and reimbursement properly categorized. Amazon settlement reports do not map cleanly to accounting categories, so an ecommerce-specific accounting process is what translates the data accurately. Keep receipts and invoices for all inventory purchases and maintain a running inventory count, because if you are audited, the IRS will ask for documentation supporting every COGS deduction.
Systems, Reports, and Software That Make Compliance Easier
Manual tracking works for a few hundred orders a month. As you scale, you need systems that pull data automatically, categorize transactions, and flag compliance issues early. The right combination of Amazon reports, accounting software, and tax tracking turns monthly accounting into a manageable process.
The Seller Central Reports to Review Every Month
Your Tax Document Library in Seller Central holds your 1099-K and other tax documents. Check it at least quarterly to confirm your account information and complete your tax interview.
The Settlement Report (Payment Report) is your main financial document. It shows every transaction behind each biweekly deposit, including product sales, refunds, Amazon fees, FBA fees, advertising charges, and reimbursements. This is the report to reconcile against your bank deposits.
The Transaction Report offers a granular view of individual orders, including sales tax collected, marketplace facilitator tax, and shipping charges. Use it to verify the sales tax Amazon collected and remitted.
The Inventory Event Detail Report tracks inventory movements, including receipts, shipments, adjustments, and removals. It is essential for tracking inventory across fulfillment centers and identifying where your products are stored for nexus purposes.
Review these monthly. Delaying reconciliation raises the risk of errors and missed deductions.
Accounting Software and E-Commerce Connectors
A cloud accounting platform forms the backbone of your books, but these platforms do not natively interpret Amazon settlement reports. Settlement data is complex, bundling many transaction types into a single deposit, and manual entry is tedious and error-prone.
An ecommerce settlement connector bridges that gap. It pulls your Amazon settlement data, breaks it into proper categories (sales, fees, refunds, taxes, reimbursements), and posts summarized journal entries to your accounting software, with each entry matching an Amazon settlement so bank reconciliation is straightforward. The payoff is clean, audit-ready books that separate revenue from fees, refunds, and tax collected, which is exactly the clarity you want when preparing your return. Setting this up correctly is part of what our specialists do for sellers, so the data flows right from day one.
When to Use Sales Tax Automation Tools
If you have sales tax nexus in several states, manual tracking and filing becomes unsustainable. Dedicated sales tax automation platforms manage this at scale by connecting to your Amazon account and other channels, monitoring sales by state, alerting you when you cross economic nexus thresholds, calculating correct rates, and auto-filing returns. Some also handle registration in new states. For multi-state, multi-channel sellers, that kind of automation is a practical necessity rather than a luxury.
Special Situations, Risk Areas, and Next Steps
Some situations add complexity beyond standard FBA tax compliance. FBM fulfillment, international selling, and cross-border transactions each have their own rules. Audit risk exists, but a year-round workflow keeps errors to a minimum.
FBM, International Sellers, and Cross-Border Issues
If you use FBM (Fulfilled by Merchant), your nexus profile changes. You do not create physical nexus through Amazon warehouses, but you still trigger economic nexus based on sales thresholds. You control shipping locations, which can simplify your state nexus map while adding operational complexity.
International sellers selling into the US must complete Form W-8BEN (or W-8BEN-E for entities) to establish foreign status for withholding. Without a valid W-8, Amazon may withhold up to 30 percent of your gross payments. US-based sellers expanding abroad face VAT in Europe and GST in countries like Canada and Australia, each with different registration thresholds, filing schedules, and calculation methods. If you are expanding across borders, our US tax support for international ecommerce helps you keep both sides compliant. Customs duties and fees apply to imported goods for resale and should be tracked as inventory costs within COGS.
Audits, State Notices, and Documentation Gaps
State revenue departments actively identify sellers with nexus who have not registered. If you receive a notice, respond promptly, because penalties for collecting tax without a permit or failing to file required returns can escalate quickly. Common documentation gaps include missing inventory purchase receipts, failure to reconcile 1099-K gross amounts to reported income, inconsistent inventory valuation, and not tracking inventory storage locations.
If your reported income is much lower than your 1099-K and you cannot document the difference, the IRS may review your return, so proper reconciliation is your best protection. Keep all records for at least three years from the filing date, and seven years offers extra protection. Digital records are fine, as long as they are organized and accessible.
A Practical Year-Round Tax Workflow
Spread tax work throughout the year rather than cramming it into April:
Monthly: Reconcile Amazon settlement reports with bank deposits, review inventory locations for nexus, and categorize expenses in your accounting software.
Quarterly: Make estimated tax payments if required, review sales by state for new economic nexus thresholds, and file required state sales tax returns.
Annually: Download your 1099-K and reconcile it against your books, perform a year-end inventory count, gather documentation for your tax preparer, and review your business structure for potential changes.
Ongoing: Maintain a clean chart of accounts, store receipts digitally, and document unusual transactions as they occur. Organized records make tax preparation faster and cheaper.
None of this has to fall on you alone. If you would rather spend your time growing the business than reconciling settlement reports, book a free consultation with an ecommerce tax specialist and we will build a workflow that keeps you compliant and audit-ready all year.
Frequently Asked Questions
Do I need to file income taxes on revenue earned from selling online, and what records should I keep?
Yes. The IRS treats all online selling income as taxable business income, whether or not you receive a 1099-K. Keep records of all sales, Amazon fee statements, inventory purchase receipts, shipping invoices, advertising spend, and other business expenses. These records support your deductions and protect you in an audit.
When is state sales tax collected automatically on orders, and when do I need to register and remit it myself?
Amazon collects and remits sales tax on marketplace orders in almost every state with a sales tax, thanks to marketplace facilitator laws. You still need to register for a sales tax permit where you have nexus, and you may need to file returns even when no seller-collected tax is reported. For sales outside Amazon, such as your own website, you handle collection and remittance.
How can I find the tax rate charged to customers for each state and verify it?
Tax rates vary by state, city, county, and special district. Use Amazon’s transaction reports to see the tax collected on each order. For independent verification, check each state’s department of revenue or use a sales tax automation tool with up-to-date rate databases.
Where can I download reports that show sales tax collected on orders and refunds for my bookkeeping?
In Seller Central, access the Tax Document Library for your 1099-K and related documents. For detailed sales tax data, download the Transaction Report or Settlement Report, which break down sales tax collected, refunds processed, and fees for each order.
Which tax forms should I expect to receive for marketplace payouts, and how do I use them when filing?
You will receive Form 1099-K from Amazon if your gross payments exceed $20,000 and you have more than 200 transactions in a calendar year. It reports gross payment amounts, including sale price, shipping, and sales tax. When filing, report the 1099-K gross on the appropriate form for your business structure (Schedule C, Form 1065, or Form 1120), then subtract all allowable expenses and adjustments to arrive at taxable profit.
What fees and withholdings are taken out of a $100 sale, and how do they affect my taxable profit?
On a typical $100 FBA sale, Amazon deducts a referral fee of roughly 8 to 15 percent depending on category, plus an FBA fulfillment fee that varies by size and weight, often $3 to $6. Amazon also takes a share of monthly storage fees. After these deductions, your net payout might be $75 to $85. Your taxable profit is lower still once you subtract cost of goods sold and other operating expenses, and every fee Amazon charges is a deductible business expense, so accurate categorization matters.