If you sell online, your finances are rarely as simple as “sales minus expenses”. Money arrives in batches, fees get deducted before you ever see the cash, refunds can hit days later, and VAT can change depending on where your customer lives. That is why e-commerce accounting is its own speciality.

This guide walks you through what an e-commerce accountant actually does, how it differs from general small business accounting, and what to look for if you are hiring one.

Why E-Commerce Accounting Is A Different Job

A traditional business might have a few income streams and a bank account that matches the invoices. E-commerce is more like a web of systems.

You Are Not Just Selling, You Are Settling

In e-commerce, the “sale” and the “cash in your bank” are often two different things.

Platforms and payment processors bundle transactions and pay you out on a schedule, not instantly. Stripe, for example, pays out based on a payout schedule that can vary by country and business type.
Shopify Payments also runs on payout timing and payout reports, with fees, refunds, and adjustments affecting what lands in your bank.

An e-commerce accountant’s job is to make sure your accounts reflect what actually happened, not just what hit the bank.

Your Numbers Live Across Multiple Systems

Even a simple online shop can involve:

A store platform (Shopify, WooCommerce)
A payment processor (Stripe, Shopify Payments, PayPal)
Marketplaces (Amazon, Etsy)
Shipping tools and couriers
Ad platforms (Meta, Google)
An accounting system

E-commerce accounting is the discipline of pulling all that into one clean financial picture that you can trust.

The Core Job: Turning Messy Data Into Clean Financials

This is the less glamorous part, but it is the foundation of everything else.

Sales Reconciliation That Matches Reality

Reconciliation means proving that your reported sales, fees, refunds, and payouts line up with your bank deposits.

Shopify provides payout details and exports that help you connect orders to payouts. Stripe provides payout reconciliation reporting so you can match bank payouts back to the underlying transactions.

An e-commerce accountant typically:

Maps each payout to the correct accounting entries
Splits gross sales from fees, refunds, and adjustments
Flags timing differences, negative balances, or missing payouts
Makes sure you are not accidentally recording “net deposits” as revenue

If you only ever book the net payout that lands in your bank, your revenue and fees will be wrong, and your reporting will be misleading.

Fee Tracking So You Know Your True Cost Of Selling

Payment processing fees, platform fees, marketplace commissions, and chargeback fees can quietly eat margin. You can view payout fees inside Shopify Payments. Stripe’s payout reconciliation reporting also supports fee-level transparency when you pull reports correctly.

A specialist accountant will structure your chart of accounts so fees are not buried, and you can see the real cost per channel.

VAT and E-Commerce: The Compliance Layer Most Sellers Miss

When selling online, tax rules become more complex — especially once you start trading across borders.

Understanding VAT Registration Thresholds in Ireland

For many Irish businesses, the first question is whether you need to register for VAT based on turnover. Revenue sets out the main thresholds, including €42,500 for services and €85,000 for goods (with specific rules for mixed supplies and other cases).

An e-commerce accountant helps you:

Track turnover correctly (not just cash received)
Decide when registration is required
Set up VAT coding so returns are not guesswork later

OSS And IOSS: If You Sell Across The EU, It Gets More Complex

If you sell B2C across EU borders, the One Stop Shop (OSS) was designed to simplify VAT obligations by letting businesses account for VAT through a single member state in certain situations. Revenue explains OSS and how it works, including the Union and non-Union schemes.

For imports, the EU’s VAT e-commerce rules removed the old low-value import VAT exemption and introduced the Import One Stop Shop (IOSS) for certain distance sales of low value goods not exceeding €150.

An e-commerce accountant’s job here is not to drown you in rules. It is to help you understand what applies to your setup, and make sure your VAT reporting is consistent with how you sell.

Marketplaces Can Change Who Is Responsible For VAT

If you sell through an online marketplace, VAT responsibility can shift in certain circumstances.

For instance, there’s the “deemed supplier” concept for electronic interfaces facilitating goods, and the VAT obligations that can apply to the deemed supplier. Marketplaces can be treated as having received and supplied the goods themselves in certain cases.

Practically, this affects how your sales are treated, what records you keep, and what gets reported where. A specialist accountant helps you avoid double-counting VAT obligations or assuming the marketplace “handles everything” when it does not.

Inventory And Cost Of Goods: Where Profitability Gets Distorted

If you sell physical products, inventory and cost of goods sold (COGS) can make or break your numbers.

COGS Is Not Just “What You Paid For Stock”

A specialist e-commerce accountant helps you build a method to track:

Opening and closing stock
Landed costs (shipping, duties, packaging where relevant)
Stock write-offs, damaged goods, and shrinkage
Timing differences between buying stock and selling it

If inventory is wrong, your profit is wrong. That can lead to bad decisions, like scaling ads on a product that looks profitable but is not.

Gross Margin By Product And Channel

E-commerce businesses often sell through more than one channel. The margin on your website sales may differ from marketplace sales once you include marketplace fees, fulfilment fees, and returns behaviour.

A specialist accountant structures your reporting so you can see:

Margin by product category
Margin by channel (site vs marketplace)
Margin by campaign periods (for promos and seasonal sales)

Refunds, Returns, And Chargebacks

Returns are normal in e-commerce. The accounting needs to reflect that reality.

Refund Tracking That Does Not Break Your Books

Platforms like Shopify provide guidance on refunds, including how they are processed and tracked, and even details like using ARNs for certain card networks.

An e-commerce accountant will make sure refunds are:

Linked back to the original sale
Not accidentally booked twice
Reflected in a way that keeps revenue and VAT reporting accurate

Chargebacks And Disputes Need Proper Treatment

Chargebacks are not just customer service problems. They are financial events.

A specialist accountant helps you:

Track chargeback losses separately from normal refunds
Account for chargeback fees
Spot patterns that point to fraud or fulfilment issues

Cash Flow Management For E-Commerce Is Its Own Skill

You can be profitable and still run out of cash, especially if you hold stock.

Timing Differences You Need To Plan For

E-commerce cash flow is affected by:

Payout delays and rolling reserves
Inventory buying cycles
VAT payment timing
Refund spikes after sales periods

Reconciliation and quick matching can help spot mismatches early and keep financial data accurate, which also supports better cash planning.

A specialist accountant uses your actual payout and inventory patterns to help you forecast realistically, not optimistically.

The Value-Add: Reporting That Helps You Run The Business

A general accountant might give you accounts that are technically correct. An e-commerce accountant aims to give you numbers that are useful.

KPIs That Actually Matter Online

Depending on your model, a specialist accountant can help you track:

Contribution margin (after product costs, shipping, and fees)
Return rate and its cost
Customer acquisition cost alongside gross margin
Fee rates by processor or channel

This is where you start making better decisions, like which products to push, which channels to prioritise, and what needs fixing in fulfilment.

Making Your Financials Investor And Lender Friendly

If you ever plan to raise funding, apply for a loan, or sell the business, clean e-commerce accounting is a huge asset. Proper reconciliation, clear fee reporting, and VAT compliance create confidence.

How To Choose An E-Commerce Accountant

Here is a simple way to evaluate whether someone truly understands e-commerce, without needing to become an accountant yourself.

Questions to ask them:

How do you reconcile payouts to sales?

Listen for mention of payout reports and reconciliation, not “we just use the bank feed”.

How do you handle refunds, partial refunds, and chargebacks in the books?

Refunds and chargebacks should be treated as routine accounting events, not as rare or “unusual” exceptions.

If I sell to EU consumers, how do you help with OSS or IOSS considerations?

A knowledgeable accountant will understand the OSS and IOSS structures and know where to source accurate guidance.

If I sell via marketplaces, how do you treat deemed supplier situations?

It’s important they recognise that marketplaces can be deemed suppliers in certain cases, as this directly affects VAT reporting and compliance.

How do you track inventory and COGS for an online seller?

You want a clear, repeatable method, not vague reassurance.

Watch For Red Flags

They talk only about year-end accounts and tax returns, with no mention of reconciliation.
They treat “net payouts” as revenue.
They have no plan for cross-border VAT complexity.
They cannot explain their process in simple language.

An e-commerce accountant is part bookkeeper, part systems translator, and part risk manager. They reconcile platforms and payouts, track fees properly, handle refunds and chargebacks cleanly. And hold your hand through VAT complexity like OSS, IOSS, and marketplace rules.

Most importantly, they give you numbers you can use to make better decisions.

Want that for your business?

>>Talk to Forti e-commerce accountants<<