CPA Services for NJ E-Commerce Businesses & Online Sellers
E-commerce has created a new category of tax complexity. Online sellers face economic nexus rules in 45+ states after South Dakota v. Wayfair (2018), multi-platform income reconciliation (Amazon, Shopify, eBay, Etsy), inventory cost accounting, and 1099-K filing thresholds that have shifted dramatically.
CPA Services for E-Commerce
E-commerce has created a new category of tax complexity. Online sellers face economic nexus rules in 45+ states after South Dakota v. Wayfair (2018), multi-platform income reconciliation (Amazon, Shopify, eBay, Etsy), inventory cost accounting, and 1099-K filing thresholds that have shifted dramatically.
Monaco CPA provides tax preparation and accounting for NJ e-commerce sellers — from solo Amazon FBA operators to multi-channel Shopify businesses with six-figure revenues. I help online sellers understand their sales tax obligations, account for inventory correctly, and minimize their tax liability.
Whether you sell physical products, digital downloads, or a combination, I provide the accounting and tax compliance your online business needs to scale without surprises.
Common Tax & Accounting Challenges for E-Commerce
E-commerce businesses face sales tax nexus obligations in dozens of states, complex inventory costing, multi-platform income reconciliation, and platform fee accounting — all requiring a CPA who understands online business models.
- Economic nexus analysis in states where you have triggered sales tax obligations
- Multi-platform income reconciliation (Amazon, Shopify, eBay, Etsy, TikTok Shop)
- 1099-K reporting changes and gross receipt vs. net income confusion
- Inventory cost accounting (FIFO, LIFO, weighted average)
- Amazon FBA fee accounting and cost of goods sold calculation
- NJ Sales Tax on digital products and software
- Entity structure planning as revenue scales
- Marketplace facilitator laws and platform-remitted sales tax tracking
- Deducting platform fees, shipping costs, and advertising spend
- Home-based business deductions (home office, storage space)
What Monaco CPA Provides
Every engagement is handled personally by Greg Monaco, CPA. No junior staff, no handoffs.
E-Commerce Tax Returns
Schedule C, S-Corp, and LLC returns for online sellers — with proper COGS calculation, platform fee deductions, and inventory accounting.
Sales Tax Nexus Analysis
Review of your sales volumes by state to identify where you have triggered economic nexus and need to register and collect sales tax.
Amazon FBA Accounting
Reconciliation of Amazon settlement reports, fee allocations, FBA inventory valuation, and reimbursement accounting.
Inventory Accounting
FIFO, LIFO, and weighted average cost methods — and the tax implications of each for your business profile.
Quarterly Tax Planning
Estimated tax projections based on platform-reconciled net profit — avoiding the common Q4 surprise of a large year-end tax bill.
Entity Structure Planning
LLC vs. S-Corp analysis for e-commerce sellers scaling past $50,000–$100,000 in net income — including the NJ CBT implications.
Frequently Asked Questions
What is economic nexus and how does it affect my online store?
After the Supreme Court's 2018 ruling in South Dakota v. Wayfair, states can require out-of-state sellers to collect and remit sales tax based on economic activity alone (sales volume or transaction count) — even without a physical presence. Most states have set thresholds of $100,000 in sales or 200 transactions per year. If you sell to customers across the country, you may have triggered nexus in 20+ states without realizing it.
Does the marketplace collect sales tax for me?
For most major platforms (Amazon, eBay, Etsy, Shopify via automatic collection), yes — marketplace facilitator laws in most states require the platform to collect and remit sales tax on your behalf. However, you are still responsible for tracking where you have nexus, understanding your total liability, and managing states where the marketplace does not fully remit. A nexus analysis helps map your specific exposure.
How do I account for inventory in an e-commerce business?
Inventory is a cost of goods sold item — you deduct it when sold, not when purchased. The method you choose (FIFO, LIFO, or weighted average) affects both your taxable income and your balance sheet. LIFO can reduce taxable income in a rising-price environment but is not allowed under IFRS and requires IRS consent to change. Most small e-commerce sellers use FIFO or weighted average.
What does the 1099-K threshold change mean for my business?
Under the American Rescue Plan, the IRS lowered the 1099-K reporting threshold from $20,000 to $600. After several delays, the $5,000 threshold applies for 2024 tax year (forms issued in early 2025). Platforms like PayPal, Venmo, and Stripe will issue 1099-Ks more broadly. The 1099-K reports gross receipts — you still deduct all business expenses to arrive at taxable net income.
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Ready to simplify your e-commerce taxes?
Schedule a free 30-minute consultation with Greg Monaco, CPA. No obligation.
The information provided is for general educational purposes only and does not constitute tax, legal, or investment advice. This content is not intended or written to be used, and cannot be used, for the purpose of avoiding penalties under the Internal Revenue Code. Tax outcomes depend on your specific facts and circumstances. Viewing this material does not create a CPA-client relationship. Personalized advice is provided only through a signed engagement letter.