E-Commerce Financial Systems That Don't Break When You Scale Across Channels
We work with Amazon FBA sellers, Shopify brands and multi-channel DTC companies that have outgrown basic bookkeeping. Once you sell on more than one platform, ship from third-party warehouses and cross economic nexus thresholds in new states, the numbers in your bank account stop matching the numbers in Seller Central, and nobody can say with confidence which products actually make money.
NexusWorks rebuilds the financial layer underneath your store: settlement-level reconciliation, inventory and COGS that tie back to real unit sales, sales tax registrations that match where you actually have nexus, and CFO-level margin reporting by SKU and channel. Our CPA team is based in Torrance, California and supports e-commerce brands across the South Bay, greater Los Angeles and the rest of the country.
Selling from a specific state? See our e-commerce CPA guides for California, Texas, Florida, New York, Washington and Tennessee.
Bookkeeping tracks transactions, not true profitability
Payouts arrive net of referral fees, FBA fees, ad spend, refunds and reserves, so gross sales and deposits rarely line up with true profit.
Sales tax exposure increases across multiple states
Inventory stored in fulfillment centers and rising sales volume can create nexus in states where you have not registered or filed.
Margins become unclear across channels
Without channel-level P&Ls, a best-selling SKU on Amazon can quietly lose money once fees, returns and storage are allocated.
Based in Torrance, CA, we support e-commerce brands in California, Texas, Florida, New York and nationwide.
CORE PROBLEM
Most e-commerce businesses don’t have a sales problem, they have a financial visibility failure caused by disconnected systems and poor multi-channel reconciliation.
As you scale, you lose clarity on:
- True profit per channel
- Real tax exposure across states
- Whether growth is actually profitable or just higher revenue
The bigger you grow, the less accurate your financial picture becomes.
WHY THE SYSTEM BREAKS
Margins erode because the tools that run your store were never designed to work together:
- Bookkeeping records transactions, not profitability
- Tax planning reacts after decisions are made
- Inventory and COGS are not aligned with sales reality
- No CFO-level oversight connects the system
Without proper eCommerce CFO advisory, this creates hidden margin leakage and incorrect scaling decisions.
HOW NEXUS FIXES IT
We rebuild your financial structure into one coordinated system with a strong focus on eCommerce tax compliance and long-term financial clarity:
Sales Tax Nexus management across 20–45 states
We map economic and physical nexus, register where required, and separate marketplace-facilitator sales from the direct sales you must collect on yourself.
Inventory + COGS alignment tied to real sales data
Purchase cost, duties and inbound freight to fulfillment centers are built into unit cost, with FIFO or weighted-average methods applied consistently.
Product and channel-level margin visibility
Monthly contribution margin by SKU and by channel, after fees, returns, advertising and storage, not just top-line revenue.
CFO-level forecasting for scaling decisions
Cash flow and inventory purchasing forecasts that show how much stock you can fund before Q4 without straining working capital.
NexusWorks
True profit visibility per product and channel
Controlled multi-state tax exposure
Elimination of financial blind spots at scale
Accurate scaling decisions based on real margins
Core Services
You Can Trust
Tax Preparation
Accounts Reconciliation
Financial Reporting
Tax Planning & Compliance Support
Ready to Simplify Your Finances?
Talk to a bookkeeping specialist today.