An e-commerce accounting firm should do the following: reconcile every payout from your sales platforms to your bank account, track the cost of goods sold (COGS) by each product on an accrual basis, keep an eye on sales tax requirements in every state you ship to, close your books on a fixed date with detailed reports for each sales channel, plan for your taxes before the year ends, and outline everything in a written agreement with a set fee. Anything less is just basic bookkeeping with an e-commerce label.
Here’s why these tasks are important. Your accountant might send you a profit and loss statement that shows strong revenue, but when you check your Amazon Seller Central account, you see the actual amount Amazon kept. These two documents can describe different situations. Reporting revenue as gross means you may owe taxes on money you haven’t actually received. If you estimate COGS just once a year, your monthly profit calculations are based on guesses. If no one tracks your sales tax requirements, a state could surprise you with a bill for past years.
A specialist accounting firm focuses on how online brands receive payments. It starts with detailed settlement reports, not just bank deposits. It records inventory as an asset until it is sold. It monitors state sales tax thresholds monthly instead of once a year.
The benefits include accurate data for decision-making: profit margins by sales channel and product, expected tax bills, and robust financial records for lenders or buyers. This article details the six key deliverables, so you can hold any firm, including ours, accountable. Start with the most crucial differentiator for specialists: payouts.
Key Takeaways
- A payout is not revenue. A specialist firm splits every deposit into sales, fees, refunds, and chargebacks from the settlement report.
- COGS belongs at SKU level, on accrual, with freight and duties inside it; inventory stays on the balance sheet until it sells.
- Sales tax nexus is a monthly monitoring job. Marketplace facilitator laws cover your Amazon orders, not your Shopify orders into the same state.
- A committed close date and a report pack showing P&L by channel and margin by SKU are the minimum monthly deliverables.
- Tax planning happens mid-year on accurate monthly numbers, with an EA or CPA who can represent you if a state asks questions.
- Compare two quotes on scope, channels, SKUs, states, close date, review layer, never on the monthly number alone.
Why an E-commerce Accounting Firm Keeps Correct Books, Not Just Balanced Ones
An e-commerce accounting firm keeps correct books because it builds from your platform data, not your bank feed. Balanced books tie to the bank. Correct books tie to Amazon, Shopify, and Walmart’s own records of what you sold, what they kept, and what they sent you. A generalist delivers the first. Only the second tells you whether you made money.
Here’s the mechanism. A traditional business invoices a customer, receives payment, records revenue. You don’t. You receive a net deposit that Amazon or Shopify has already stripped of referral fees, FBA fees, ad spend, refunds, chargebacks, and the occasional reimbursement. When a firm’s process starts at the bank feed, that deposit lands as “Sales”, balanced, reconciled, and wrong. Every number downstream inherits the error: gross margin, taxable income, the contribution margin you use to set ad budgets.
Inventory is straightforward. When a generalist buys stock, they record the expense when they pay. This may cause profit and loss (P&L) to vary based on buying instead of selling. For instance, stocking up for the fourth quarter might look like a bad month, while selling everything could show a large profit. These figures don’t reflect the true situation.
A specialist firm organizes its processes based on how you get paid. It sets up the chart of accounts by channel, breaks down payments from the settlement report, and keeps inventory on the balance sheet until it ships. This fits your business model rather than using a generic approach.
To test this, ask any firm how an Amazon settlement report leads to journal entries. A specialist will explain the details, while a generalist will simply categorize the deposit. This response reveals the type of accounting you’ll receive.
The next five sections outline what a correct answer includes, and you can request this information for your numbers.
Payout Reconciliation: What Your Ecommerce Accountant Should Do With Every Deposit
Every month, your e-commerce accountant should break down each platform’s payout into gross sales, discounts, shipping collected, platform fees, ad spend, refunds, chargebacks, reimbursements, and sales tax collected. Each category needs its own account, and the total must match your bank deposit exactly. This is called payout reconciliation, and it’s crucial for e-commerce accounting firms, although many do it poorly.
A proper reconciliation starts with the platform, not the bank. For Amazon, use the settlement file. For Shopify, use the payout export along with statements from Shopify Payments and PayPal. Walmart and eBay have similar files. Your accountant will map each line to an account, check the total against the deposit, and investigate any differences before the month ends.
This process is important for understanding the profit margins for each sales channel. If you combine all fees into one category, you can’t tell which channel is profitable. This information is vital for deciding where to spend your marketing budget. Usually, the channel with the highest sales has the lowest profit margin after fees and ads.
Tools like A2X can help automate the mapping, but you still need someone to set it up correctly and catch any new fees or timing gaps. That someone is your accountant. If the firm can’t identify who is responsible for this, then no one is.
You should receive a monthly report showing changes from gross to net for each channel, matched to your bank account. If a firm can’t provide this, they are categorizing deposits rather than reconciling payouts.
Request last month’s report on your Amazon account, and you’ll see the difference in about ten minutes.
COGS and Inventory: How an Ecommerce Accounting Firm Tracks Margin by SKU
An ecommerce accounting firm should record the cost of the units you sell in the month you sell them. This should be done at the SKU level and include costs like freight, duties, and inbound handling. You will hold inventory on your balance sheet until that point. This is called accrual COGS with landed cost, and it is the only way to know if a product is profitable.
Cash-basis COGS records inventory when you pay for it, while accrual COGS records it when the unit sells. At any real volume, only the second method gives you a useful margin because your buying and selling cycles do not match up.
A specialist goes beyond just the accounting method. SKU-level tracking shows that your best seller might have the smallest profit margin. Landed cost includes the supplier invoice plus all costs to get the product on the shelf, not just the invoice itself. The firm should choose a valuation method and stick to it. Weighted average works for most brands under $20M. FIFO is useful only when costs change enough to matter. Changing methods without a reason is a mistake.
Here’s something many firms overlook: inventory you can’t see. Stock at a 3PL, in FBA, in transit from the supplier, or returned items that can be resold should still be on your balance sheet. If you only count what’s in your own warehouse, you will undervalue your assets and overstate COGS.
You should receive monthly gross margin reports by SKU and by channel, plus an inventory roll-forward. This roll-forward shows your opening inventory, purchases, COGS, and adjustments to calculate your closing inventory. It should match your inventory system or 3PL report. If it doesn’t match, the firm should explain the difference before a buyer’s diligence team does.
Our books review runs that roll forward on the last closed month, which is usually where the first surprise appears.
Sales Tax Nexus: Why E-commerce Accountants Monitor It Monthly, Not Yearly
E-commerce accountants should track your sales by ship-to state across every channel each month, flag when you approach a state’s economic nexus threshold, register you before you cross it, and manage the filing calendar once you’re registered. Nexus is a monitoring job. A generalist treats it as a year-end one, and that gap is where the penalties live.
Since South Dakota v. Wayfair, any state with a sales tax can require you to collect once you cross its threshold — commonly $100,000 in sales or 200 transactions in a year, though thresholds and counting rules vary by state. Marketplace facilitator laws mean Amazon and Walmart collect on marketplace orders for you. They do not cover your Shopify orders into the same state, and they do not register you.
Let me explain why this compounds. Uncollected tax becomes your liability, not the customer’s. Add penalties and interest, multiply by the years you sat over the threshold, and a $2M brand can carry a six-figure problem it never knew about. Brands that grew fast usually crossed thresholds in states they never registered in; the firm should quantify that exposure and walk you through voluntary disclosure before a notice arrives.
What you should receive: a nexus tracker showing sales by state against each state’s threshold, your registration status, and a filing calendar with confirmations. If the firm files through Avalara or TaxJar, fine — but a named person at the firm owns the monitoring, and you should know their name.
Not sure which states you’re already over in? That’s the first thing our review checks, because it’s the number most founders are furthest off on.
What Should an Ecommerce Accounting Firm Deliver at Month-End Close?
An ecommerce accounting firm should deliver, on a committed date each month, a P&L by channel, a balance sheet, a cash-flow statement, gross margin by SKU, an inventory roll-forward, and a nexus summary, plus a short note on what moved and why. That’s the report pack. The date is part of the deliverable, not a courtesy.
The date of your financial close is crucial. If your bookkeeper closes the books late, you’ll get numbers that aren’t useful. For example, if you receive your March profit and loss (P&L) report on May 10th, you’ve already made decisions for March based on instinct. Late but accurate information is almost useless.
Make sure your engagement letter specifies the exact closing date, not just “monthly.” Confirm this date before signing and ask what happens if they miss it.
The closing process should follow a clear order: reconcile payouts from settlement reports, update inventory and cost of goods sold (COGS), reconcile bank and card accounts, book accruals and prepaids, and have a senior review the work. This is where you can catch mistakes. Inquire who conducts this review and whether they sign the return.
Don’t settle for just a QuickBooks P&L report; that’s basic bookkeeping. Expect a complete accounting package, a specific closing date, and a thorough review.
If you want to see what a full monthly package looks like for your business size, ask us for a sample. It’s an easy way to compare with what you currently receive.
What Should an Ecommerce CPA or EA Do for Your Tax Planning Before Year-End?
An ecommerce CPA or Enrolled Agent should meet with you mid-year to estimate your taxes based on your current income, outline your options, and show the value of each. You also need to adjust your quarterly estimates as the year progresses. Meeting compliance is the minimum; the real value comes from planning, which must happen before December.
Timing is essential. Any changes, like your business structure, pay adjustments, or depreciation methods, must be made before the year ends to affect your taxes. Discussing last year’s taxes in March only focuses on filing and doesn’t help you financially.
Good planning requires accurate financial information. Reliable profit data lets a firm address key questions for businesses earning between $1M and $20M, such as whether an S-corp can save on self-employment taxes, if your compensation is reasonable, how inventory methods impact taxable income, if accelerated depreciation is beneficial this year, and what estimated payments can avoid surprises in April. Using cash-basis accounting can lead to incorrect answers.
Credentials matter. A firm with an IRS Enrolled Agent or CPA can represent you if the IRS or your state has questions. This situation is likely if you operate in multiple states.
Expect a mid-year planning meeting with tax projections, a list of your options and their values, and updated tax estimates that reflect your business. If you only discuss taxes when your return is due, you haven’t planned.
Finally, confirm who will sign your return and if the same person reviewed your financial close. At our firm, it is the same person, and it’s worth checking at any firm you consider.
How Should an Outsourced Ecommerce Accounting Firm Quote You?
When hiring an outsourced ecommerce accounting firm, they should provide a fixed monthly fee after a quick call. This fee must detail included services and factors that could change the price. If a firm won’t share the cost until you sign, that’s a red flag.
Details matter more than the price. Quotes can differ significantly based on what’s covered. Two firms may quote the same brand with a $1,500 difference, and both can be correct. One may include state sales tax filing, while the other does not. Comparing only the fee can lead to poor choices.
Put both quotes on the same level before comparing them:
- Reconciliation scope: Which channels and processors are included? Is A2X licensing part of the fee or an extra cost?
- Inventory and COGS: Do we need SKU-level accrual details, or a monthly adjustment based on your count? Is landed cost included?
- Sales tax: Are we just monitoring this, or also handling registration and filing? How many states are involved?
- Close date and report pack: What is the agreed day for closing, and what is included in the report pack?
- Tax: Is the tax return included? Is tax planning part of the package or billed separately?
- Clean-up: Is there a flat fee for past periods, or do we charge hourly with no limit?
- Fee model: A fixed monthly fee is the standard among specialists and the only model you can plan for.
- Work responsibilities: Who performs the work and who reviews it? Does a named CPA or EA oversee it, or does a pooled team handle it?
The fee depends on five key factors: channel count, SKU count, transaction volume, states with nexus, and how current your records are. A firm should quote only after reviewing your channel mix; without this review, the quote is just a guess.
Remember, the cheapest quote often skips important steps. A more expensive quote might include extra padding. The best quote is one where you can understand each detail and hold the firm accountable. Request our quote and compare it to what you have.
Bottom Line
An e-commerce accounting firm charges for six key services: reconciling payouts from settlement reports, calculating costs for each product sold (COGS), tracking sales tax each month, providing scheduled closing dates with detailed reports, planning taxes before December, and offering a clear scope with a fixed fee. Be sure to ask for each service by name.
Next, check the payout process. The firm should guide you from an Amazon settlement report to the journal entries. A specialist will give you detailed explanations, while a generalist may only say, “we categorize the deposit.”
If you stick with a generalist, you risk pricing products and managing inventory based on incorrect margins because of platform fees. This also increases your sales tax exposure as your sales grow. Over a year, this can add up to high costs.
Our e-commerce accounting firm starts by reviewing your last closed month, checking payouts, costs, and tax issues so you can spot problems before you decide.
Want the payout test run on your own Amazon or Shopify account?
Book a free consultation call, and we’ll show you the gross-to-net bridge on one real deposit.
FAQs
1. What does an ecommerce accounting firm do?
It reconciles every platform payout to your bank, tracks COGS by SKU on accrual, monitors sales tax nexus across states, closes your books on a fixed date with a channel-level report pack, and plans tax around those numbers. Generalists do the first step from the bank feed and the rest at year-end. Our free books review shows which of these your current setup actually delivers.
2. How much does an ecommerce accounting firm cost per month?
Fees depend on channels, SKUs, transaction volume, states with nexus, and whether prior periods need clean-up, so two brands at the same revenue can pay very different amounts. Specialists price on a fixed monthly fee, not hourly. A books review gives you a specific number for your channel mix before you commit.
3. Ecommerce accountant vs bookkeeper, which do I need?
Both, inside one firm. A bookkeeper records and reconciles transactions. An accountant (CPA or EA) reviews the close, owns revenue and inventory treatment, plans tax, and represents you before the IRS. For companies with roughly $1M in revenue, that review layer catches errors that cost money. Our review tells you which layer your current provider is missing.
4. Do I need a specialist firm if I only sell on one platform?
Yes, once you hold inventory or ship into multiple states. Single-channel brands still face payout decomposition, COGS, and nexus; channel count changes the workload, not the requirements. A review of one closed month shows whether your single-channel setup already produces the errors above.
5. Can a firm clean up months of messy books before starting?
Yes. Most specialist engagements begin with a clean-up of prior periods so the first close starts from reconciled balances. Ask how far back the firm goes and whether it prices the work flat or hourly.
