Ecommerce Tax Deductions Checklist for 2026: What Online Sellers Can Write Off
The Deductions Most Ecommerce Sellers Miss
Every dollar you deduct is a dollar that doesn’t get taxed. For ecommerce businesses operating on thin margins — often 10%–20% net — capturing every legitimate deduction can be the difference between a good year and a great one.
The good news: ecommerce businesses have an unusually broad range of deductible expenses. The bad news: most sellers either miss deductions entirely or categorize them incorrectly.
Here’s the complete checklist for 2026.
Category 1: Inventory and Cost of Goods Sold
Your inventory costs are the most significant deductions for product-based businesses.
Deductible inventory costs:
- ☐ Product manufacturing costs
- ☐ Wholesale purchase price of goods for resale
- ☐ Inbound freight and shipping to your warehouse
- ☐ Import duties and customs fees
- ☐ Packaging materials (boxes, poly bags, tape, labels)
- ☐ Product inspection and quality control costs
Important: Inventory costs aren’t expensed when you buy the products — they become a deduction when you sell them (through COGS). Unsold inventory at year-end is an asset, not an expense. This is why accurate year-end inventory counts matter.
Category 2: Platform Fees
If you sell on Amazon, Shopify, Etsy, eBay, or any other platform, every fee you pay is deductible.
- ☐ Amazon referral fees
- ☐ Amazon FBA fulfillment fees
- ☐ Amazon FBA storage fees
- ☐ Amazon seller account subscription
- ☐ Shopify monthly subscription (Starter, Basic, Shopify, Advanced)
- ☐ Shopify Payments processing fees
- ☐ Shopify transaction fees (if using third-party payment processor)
- ☐ Etsy listing fees and transaction fees
- ☐ eBay final value fees
- ☐ PayPal, Stripe, or other payment processor fees
Category 3: Shipping and Fulfillment
- ☐ Outbound shipping costs (USPS, UPS, FedEx, DHL)
- ☐ Shipping label software (ShipStation, EasyPost, Pirateship)
- ☐ Fulfillment center fees (3PL providers)
- ☐ Returns shipping costs
- ☐ Packaging supplies used for orders
Category 4: Advertising and Marketing
Marketing is one of the largest expense categories for ecommerce businesses — and every dollar is deductible.
- ☐ Amazon PPC advertising
- ☐ Google Shopping and Search ads
- ☐ Meta (Facebook/Instagram) advertising
- ☐ TikTok advertising
- ☐ Pinterest advertising
- ☐ Email marketing platforms (Klaviyo, Mailchimp)
- ☐ Influencer marketing payments (1099-NEC required if FMV of products or payments to a single influencer reaches $2,000 or more in 2026)
- ☐ PR and media placements
- ☐ Affiliate marketing commissions
- ☐ SEO services and tools (Ahrefs, SEMrush, SurferSEO)
- ☐ Photography and videography for product listings
- ☐ Graphic design and creative services
Category 5: Software and Technology
- ☐ Accounting software (QuickBooks, Xero)
- ☐ Inventory management software (InventoryLab, Cin7, Skubana)
- ☐ Ecommerce analytics tools (Sellerboard, Helium 10, Jungle Scout)
- ☐ Customer service software (Gorgias, Zendesk)
- ☐ Project management tools (Asana, Notion, Monday)
- ☐ Sales channel reconciliation software (A2X)
- ☐ Sales tax software (Kintsugi, TaxValet, Avalara, Numeral)
- ☐ CRM software
- ☐ Website hosting (if using your own storefront)
Category 6: Professional Services
- ☐ Accounting and bookkeeping fees
- ☐ CPA or tax preparation fees
- ☐ Legal fees (contracts, terms of service, IP)
- ☐ Business consulting fees
- ☐ Ecommerce coaching or courses (if directly related to your business)
Category 7: Home Office (If Applicable)
If you use a dedicated space in your home exclusively and regularly for business, you can deduct a portion of:
- ☐ Rent (proportional to office square footage)
- ☐ Mortgage interest (proportional)
- ☐ Utilities
- ☐ Renter’s or homeowner’s insurance
- ☐ Internet service
Two methods:
- Simplified: Deduct $5 per square foot, up to 300 square feet ($1,500 max)
- Regular: Calculate actual expenses proportional to your office percentage of home
The regular method typically yields a larger deduction if you have significant home expenses.
Category 8: Vehicle and Travel
- ☐ Business mileage (for inventory pickups, post office runs, supplier visits)
– 2026 standard mileage rate: 72.5 cents per mile
- ☐ Parking and tolls related to business travel
- ☐ Business travel (flights, hotels, transportation) to trade shows, supplier visits
- ☐ Business meals at trade shows or with suppliers (50% deductible)
- ☐ Amazon or manufacturer facility visits
Category 9: Contractors and Employees
- ☐ Wages paid to employees (W-2)
- ☐ Payments to freelancers and contractors (1099 required if over $600)
– Virtual assistants
– Graphic designers
– Copywriters
– Customer service reps
– Social media managers
- ☐ Payroll processing fees (Gusto, ADP, etc.)
- ☐ Employee benefits (health insurance, 401k match)
Category 10: Equipment and Assets
- ☐ Computers and laptops
- ☐ Printers and label printers
- ☐ Photography equipment
- ☐ Barcode scanners
- ☐ Warehouse equipment (shelving, pallet jacks)
- ☐ Office furniture
Section 179: In 2026, you can deduct up to $2,560,000 of qualified equipment purchases in the year of purchase rather than depreciating over time.
Bonus depreciation: 100% bonus depreciation is available in 2026 for qualified assets acquired and placed in service after January 19, 2025. The One Big Beautiful Bill permanently reinstated full bonus depreciation, eliminating the phasedown schedule that would have reduced it to 20% this year.
What You Cannot Deduct
- Personal expenses paid through the business (ever)
- Commuting costs (home to office)
- Fines and penalties
- Lobbying expenses
- Club memberships (unless directly business-related)
- Inventory that wasn’t sold (deducted through COGS when sold, not when purchased)
2026 Ecommerce Tax Filing Tips
Track everything in real time: Don’t wait until tax season. Use accounting software and connect it to your bank, credit cards, and ecommerce platforms.
Separate personal and business finances: One business bank account, one business credit card. This is non-negotiable.
Issue 1099s: Payments to freelancers and contractors (1099-NEC required if $2,000 or more in 2026 — the One Big Beautiful Bill raised the threshold from $600, effective January 1, 2026)
Estimated quarterly taxes: If you’re profitable, you should be paying quarterly estimated taxes. Missing these results in underpayment penalties on top of your annual tax bill.
State sales tax: Don’t confuse income tax deductions with sales tax obligations. You need to collect and remit sales tax in states where you have economic nexus — and that sales tax is not a deductible expense.
Frequently Asked Questions
We use products from our store as marketing samples and influencer gifts. How do we handle those for taxes?
Products withdrawn from inventory for business use are deductible, but the accounting matters. Remove them from inventory at cost (not retail price) and record the corresponding business expense in the appropriate category (marketing samples, influencer gifting). Do not leave them in inventory and separately expense them, as that double-counts the deduction.
For influencer product gifting, if the fair market value (FMV) of products sent to any single influencer reaches $2,000 or more in a year, you need to issue a 1099-NEC. FMV is simply what you would charge a regular customer for those same products at retail. This threshold was raised from $600 to $2,000 effective January 1, 2026 under the One Big Beautiful Bill. The IRS treats FMV as compensation for content creation services, so the same reporting rules apply as with any contractor payment. This requirement catches many ecommerce brands off-guard, so document your influencer agreements clearly to distinguish gifting from compensation.
My sales tax software is telling me I owe back taxes in states where I didn't know I had nexus. What do I do now?
Do not ignore it, and do not file without professional guidance. Most states with significant back sales tax liability have a Voluntary Disclosure Agreement (VDA) program. Through a VDA, you come forward proactively, pay back taxes for a limited lookback period (typically 3 to 4 years, sometimes less), and receive penalty waivers. Note that interest on unpaid taxes is generally still owed even under a VDA — only penalties are waived.
The alternative, being discovered in an audit, typically involves a longer lookback period, full penalties, and far less negotiating leverage. Contact a sales tax attorney or a firm specializing in ecommerce sales tax compliance before you do anything. We have seen ecommerce sellers with six-figure back tax liability resolve their exposure for significantly less through VDAs than they would have paid had they been audited. Do not wait.
We advertise heavily on Meta and Google. Are those costs deductible even when the campaigns aren't profitable?
Yes — advertising costs are deductible as ordinary business expenses in the year incurred, regardless of whether the campaigns generated a positive return. The deduction isn’t contingent on profitability. However, if you receive ad credits or refunds from Meta or Google (for example, disputed charges or promotional credits), those reduce your deductible expense. Track advertising spend net of credits. The one nuance: if you’re paying for ads primarily for personal benefit or in a hobby-like activity that isn’t a real business, the IRS can challenge deductions under the hobby loss rules. For legitimate ecommerce businesses with profit intent, this isn’t a concern.
How do I handle year-end unsold inventory for tax purposes?
Unsold inventory is not deductible when purchased. It is a balance sheet asset that becomes deductible through cost of goods sold (COGS) only when the product is actually sold. At year-end, you need an accurate inventory count to calculate your ending inventory value using this formula: Ending Inventory = Beginning Inventory + Purchases – COGS.
The IRS requires you to use a consistent inventory valuation method year over year. The three accepted methods are FIFO (First-In, First-Out), LIFO (Last-In, First-Out), and weighted average. You cannot switch between methods from year to year to chase a larger deduction. If you do need to change methods, that requires filing Form 3115 with the IRS. One note for smaller sellers: businesses with average annual gross receipts of $32 million or less may qualify for simplified inventory accounting rules under the IRS small business exemption.
One planning opportunity worth knowing: if you have slow-moving or damaged inventory at year-end, you can write it down to its net realizable value (what you would realistically collect selling it at a discount) and deduct the difference. This requires documentation supporting the lower value, such as market listings, disposal records, or damage photos
We have a home office where we also store some inventory. How does that affect our home office deduction?
If you use a dedicated space in your home exclusively and regularly for business as both an office and for inventory storage, you may qualify for both the home office deduction and a separate storage space deduction.
The IRS allows a deduction for space used to store inventory even if that storage area is not used exclusively for business, which is an exception to the standard exclusive-use rule that applies to the home office itself. However, there is an important condition: this storage exception only applies if your home is the sole fixed location of your business. If you also operate out of a warehouse, fulfillment center, or outside office, you likely do not qualify for this exception.
When you do qualify, the calculation is straightforward. Add up the square footage of your dedicated office and your inventory storage area, then deduct that combined percentage of your total home expenses. Keep photos of the storage area with inventory clearly visible, and document that the space is regularly used for that purpose. Both are useful if the IRS ever questions the deduction.