Best Accountants for Amazon FBA Sellers in 2026

Best Accountants for Amazon FBA Sellers in 2026

An Amazon FBA business looks profitable in Seller Central and then falls apart in the books. The deposit that hits your bank is net of fees, refunds, ads, and reserves, so the number you see is not your revenue and it is definitely not your profit.

Add inventory that should be counted as cost of goods sold only when it sells, not when you buy it, plus sales tax obligations in states you have never set foot in, and you have an accounting problem that a general small business CPA is not built for.

This list covers Sam's List accountants who understand marketplace sellers, what that specialty buys you, and how to pick the right one for your stage.

How We Picked These Firms

Every firm below is a vetted member of the Sam's List directory with a public profile and real experience serving ecommerce and marketplace sellers. We describe each by its actual specialty, and where a firm has a meaningful number of client reviews, we cite the verified count from its live Sam's List profile as of the date noted. Placement is not pay-to-play and is not ordered by who paid the most. Review counts reflect client experiences on Sam's List, are not endorsements by the platform, and are not indicative of future results. Confirm any firm's credentials and fit before you engage.

1. ECOM CPA: Best for Sellers Who Need an Ecommerce-Native Firm

ECOM CPA is an Oregon-based firm founded in 2016 that serves clients across multiple states, working with SMB owners, digital nomads, high-net-worth individuals, and partnership income situations. The practice is built around ecommerce, which is exactly the fit an FBA seller needs.

The value of an ecommerce-native firm is that they already speak the language of marketplace payouts, COGS timing, and multi-state exposure, so you are not paying them to learn your business on your dime. The trade-off is that any specialist should be matched to your scale, so ask how they handle a seller at your revenue level and whether their process fits the platforms you sell on.

2. Iota Finance: Best for Scaling Sellers Who Need Books That Keep Up

Iota Finance is a remote, nationwide firm founded in 2022 working with SMB owners, VC-backed startups, real estate investors, and high-net-worth individuals. For a seller scaling past the point where a spreadsheet works, that broader operating focus helps keep the books current as volume climbs.

Iota Finance has 13 verified client reviews on Sam's List as of 2026-06-26. Reviews reflect the experiences of individual clients, do not represent an endorsement by Sam's List, and are not indicative of future results.

The value for a growing FBA business is books that stay reconciled month to month, so you can see real margin by product instead of guessing at year-end. The limitation to weigh is that a generalist ecommerce-capable firm may need a clear brief on your marketplace quirks, so confirm they have handled Amazon settlement data and inventory accounting specifically before you commit.

Why FBA Accounting Breaks Without a Specialist

Three things trip up almost every marketplace seller.

First, the Amazon deposit is a net figure. Treating it as revenue understates both your sales and your fees, which distorts every margin number you look at.

Second, inventory is not an expense when you buy it. It becomes cost of goods sold when the unit sells, and getting that timing wrong can make a loss look like a profit, or the reverse, and inflate the tax you appear to owe.

Third, sales tax nexus. Selling into a state can create an obligation to collect and remit there once you cross that state's economic thresholds, even with no physical presence. Marketplace facilitator rules shift some of that burden to Amazon, but not all situations are covered, and the rules vary by state. A specialist maps your exposure. A generalist often does not know to look.

How to Choose the Right Firm

Match the firm to your biggest pain, not the logo.

Your books do not reflect real profit and fees are a black box: start with an ecommerce-native firm like ECOM CPA.

You are scaling and need books that stay current with rising volume: prioritize a firm like Iota Finance that keeps monthly accounting tight.

Sales tax across states keeps you up at night: confirm whichever firm you pick has a clear process for nexus and marketplace facilitator rules, and be ready to bring in a sales tax specialist for complex cases.

You can compare these firms and others, with their specialties and verified reviews, in the Sam's List accountant directory.

Frequently Asked Questions

Why do my Amazon books not match my bank deposits? Because the deposit is net of fees, refunds, advertising, and reserves, so it is not your revenue. Proper FBA bookkeeping breaks each settlement into its parts, which is the only way to see true sales, true fees, and real profit by product. This is a common reason sellers move from generic bookkeeping to an ecommerce-native firm.

How does sales tax nexus work for Amazon sellers? Selling into a state can create an obligation to collect and remit sales tax once you exceed that state's economic thresholds, even without a physical presence. Marketplace facilitator laws require Amazon to collect and remit in many cases, but coverage varies by state and situation. An accountant who works with sellers can map where you actually have exposure.

Do I need an ecommerce-specific accountant or will any CPA do? Any licensed CPA can file a return, but marketplace accounting has specific traps around net payouts, inventory timing, and multi-state sales tax. A firm that works with sellers already has a process for those, which saves cleanup cost. For a very small single-marketplace seller, a general CPA comfortable with ecommerce may be enough to start.

How much does an accountant cost for an Amazon business? It depends on order volume, how many marketplaces and states you sell in, and whether you need bookkeeping, tax, or both. Higher volume and more states mean more work and a higher fee. Ask each firm to quote based on your actual numbers so you are comparing the same scope.