Corviniti/Services/Bookkeeping for E-Commerce & Online Sellers

Bookkeeping / E-Commerce

Bookkeeping for E-Commerce & Online Sellers

CPA-led books that reconcile every channel and payout to the penny, track COGS and inventory so your gross margin is real, and keep you ahead of sales tax nexus, so you know your true profit across Shopify, Amazon, and every marketplace you sell on.

We reconcile every channel and payout back to gross sales, track COGS and inventory so your margin is real, and keep you ahead of sales tax nexus, so you finally know your true profit across every platform you sell on.

Or call (347) 472-1115

Ro Sokhi, CPA, founder of Corviniti, on bookkeeping for e-commerce and online sellers
Ro Sokhi Founder and CEO, Corviniti
In the press
Overview

CPA-led bookkeeping built for e-commerce sellers

New York City Headquarters

Corviniti Accounting

575 5th Ave, 14th Floor
New York, NY 10017

Our headquarters, and the only office with a Google Business Profile today. Serving the five boroughs, Long Island, and northern New Jersey.

Hours

  • Monday to Friday8:00 am to 6:00 pm

By appointment. A CPA replies within one business day.

Key takeaways
  • What it is. A CPA-led team keeps your books current every month: every channel and processor payout reconciled, transactions categorized, COGS and inventory tracked, and financial statements delivered on a fixed date.
  • Who it is for. Online sellers past the do-it-yourself stage: Shopify stores, Amazon sellers, and multi-marketplace brands that need to know their real margin after fees, refunds, and cost of goods.
  • What generic bookkeeping misses. E-commerce books have to reconcile net payouts back to gross sales, cost inventory correctly, and track where sales create sales tax nexus. Generic bookkeeping treats deposits as revenue and hides all three.

Corviniti provides monthly bookkeeping to e-commerce and online sellers. The service is flat-priced: we reconcile every sales channel and processor payout to the bank, categorize your transactions, track cost of goods and inventory, book payroll from your provider, and deliver financial statements on a fixed date, with the channel and margin detail that tells you where the money is made. The team is led by a CPA with Big Four experience.

Watch

How we keep e-commerce books

Bookkeeping for e-commerce, in three minutes

3 min

How we reconcile multi-channel payouts to gross sales, track COGS and inventory for real margin, keep sales tax nexus in view, and what onboarding and cleanup look like.

  • 0:00Why online sellers need specialized bookkeeping
  • 0:45Multi-channel payouts reconciled to the penny
  • 1:35COGS and inventory for real gross margin
  • 2:20Sales tax nexus across states
  • 3:05Our satisfaction guarantee
Transparent Pricing

E-commerce bookkeeping: pick a plan

Flat monthly pricing sized to your store. Each plan keeps the books current and reconciled; the higher tiers add channel-level margin reporting, inventory accounting, and hands-on support as you scale.

Basics

Simple, accurate bookkeeping every month. Best for solo owners with < $50k monthly expenses.

$350
/month
  • Monthly bank and card reconciliation
  • Expense categorization with bank rules
  • Monthly financial statements
Get Started

Professional

Hands-on support and advanced reporting. Best for multi-entity businesses, < $100k monthly expenses.

$950
/month
  • Everything in Essential
  • Custom reports and KPI dashboards
  • Accrual, payroll, and loan tracking
  • Monthly statement walkthroughs
Get Started

Every plan is flat monthly and month to month, with no long-term contract. Catch-up and cleanup, if you need it, is a separate one-time project quoted up front. Volume above the Professional tier is quoted to scope, so contact us for a specific number.

How We Help

What you get

On an e-commerce engagement, you get books that reconcile every channel to the penny and tell you your real margin by product and platform, kept current every month by a CPA-led team.

Monthly books, reconciledEvery bank, card, and processor account reconciled to the statement, transactions categorized, and statements delivered on a fixed date.
Multi-channel reconciliationShopify, Amazon, and marketplace payouts broken into sales, fees, and refunds and reconciled through A2X and Stripe.
COGS and inventory trackingInventory on the balance sheet and cost of goods moved as it sells, so gross margin and product profitability are real.
Sales tax nexus trackingSales tracked by state so you see where you have crossed an economic nexus threshold before it becomes a liability.
Fees and refunds visiblePlatform commissions, processing, fulfillment, ad spend, and chargebacks broken out so the real cost of selling is a number you can see.
Financing and investor-ready financialsAccrual-clean, channel-reconciled records with real COGS a lender or investor will accept.

When companies bring us in

  • Your deposits from Shopify, Amazon, or Stripe are booked as revenue and the fees are invisible.
  • You do not know your real gross margin because inventory and COGS are not tracked.
  • You sell into multiple states and have no idea where you have crossed a sales tax nexus threshold.
  • You want inventory financing, a credit line, or to raise money and need books a lender or investor will trust.
Real margin

Multi-channel sales to real margin

Ecommerce revenue arrives across channels, and real margin is what survives after the deductions. Gross sales across channels (Amazon, Shopify, marketplaces, and retail) come in first; then platform fees, refunds, and chargebacks come out, leaving net deposits reconciled to the bank. Subtract COGS and inventory at landed cost and you reach the real gross margin, read by channel and by SKU. Margin is only real once fees and COGS come out, and multi-channel deposits have to reconcile to the penny before anything else is trusted. Alongside it runs sales-tax economic nexus: thresholds tripped state by state, marketplace-facilitator sales versus your own store, and registration and filing everywhere you owe.

Multi-channel sales to real margin for an ecommerce business, as a waterfall. Gross sales across channels: Amazon, Shopify, marketplaces, and retail. Less platform fees, refunds, and chargebacks: what each channel takes out. Net deposits, reconciled to the bank. Less COGS and inventory: the landed cost of the goods sold. Real gross margin: by channel and by SKU. Margin is only real once fees and COGS come out, and multi-channel deposits reconcile to the penny first. Sales tax: economic nexus tripped state by state, marketplace-facilitator sales versus your own store, registered and filed everywhere you owe.
Multi-channel sales to real margin for an ecommerce business. Illustrative.

This is for you if

  • Your deposits from Shopify, Amazon, or Stripe are booked as revenue and the fees are invisible.
  • You do not know your real gross margin because inventory and COGS are not tracked.
  • You sell into multiple states and have no idea where you have crossed a sales tax nexus threshold.
  • You want inventory financing, a credit line, or to raise money and need books a lender or investor will trust.

What you get

  • Monthly books, reconciled Every bank, card, and processor account reconciled to the statement, transactions categorized, and statements delivered on a fixed date.
  • Multi-channel reconciliation Shopify, Amazon, and marketplace payouts broken into sales, fees, and refunds and reconciled through A2X and Stripe.
  • COGS and inventory tracking Inventory on the balance sheet and cost of goods moved as it sells, so gross margin and product profitability are real.
  • Sales tax nexus tracking Sales tracked by state so you see where you have crossed an economic nexus threshold before it becomes a liability.
  • Fees and refunds visible Platform commissions, processing, fulfillment, ad spend, and chargebacks broken out so the real cost of selling is a number you can see.
  • Financing and investor-ready financials Accrual-clean, channel-reconciled records with real COGS a lender or investor will accept.
The Detail

The gaps, and how we close each one

Service 01

Multi-channel sales reconciled to the penny

Shopify, Amazon, and the marketplaces do not pay you what you sold. They pay you net of platform fees, payment processing, refunds, chargebacks, and held reserves, days or weeks later, in a single lumped deposit. Book that deposit as revenue and your top line is understated, your fees are invisible, and no report you run reflects what your store actually sold.

How we handle it

We reconcile every channel and payout back to gross sales. Each Shopify, Amazon, and marketplace settlement is broken into the sales, the platform and processing fees, the refunds, and the reserve movements that make it up, then matched to the deposit that lands in your bank. We use A2X to map Shopify and Amazon settlements into your accounting file, and connect Stripe and other processors so their payouts reconcile the same way. The result is revenue that ties to what you sold, fees you can finally see, and a bank balance that agrees to the books every month.

Service 02

COGS and inventory so your margin is real

Without correct cost of goods and inventory accounting, your profit is a guess. Booking inventory purchases straight to expense makes a big buying month look like a loss and a slow-buying month look like a windfall, and neither reflects what you earned. You end up taxed on phantom profit, or blind to margin you did make, and you cannot tell which products carry the store.

How we handle it

We account for inventory as the asset it is and move it to cost of goods sold as it actually sells, so your gross margin is real in every period. Landed cost, including freight and duties, is built into unit cost where it matters, and we tie inventory on the books to your counts so shrinkage and discrepancies surface instead of hiding. With product-level cost in place you can see which SKUs make money and which quietly drain it, and your taxable income reflects real profit rather than the timing of your last purchase order.

Service 03

Sales tax economic nexus across states

Economic nexus is where online sellers get hurt. You can owe sales tax in states you have never set foot in, triggered purely by your sales volume or order count there, and the obligation builds silently while you sell. By the time you notice, the back liability, penalties, and interest have compounded across multiple states at once.

How we handle it

We track your sales by state so you can see where you are approaching or have crossed an economic nexus threshold before it becomes a liability, not after. Marketplace-facilitated sales, where Amazon or a marketplace already collects and remits, are separated from the sales that remain your responsibility, so you register and file where you actually owe and nowhere you do not. When it is time to register in a state, your records already show what you owe and from when, so the conversation is routine rather than a scramble.

Not sure what your real margin is once fees and COGS are counted? Talk to us, and the first clean month will show you.

Talk to an Expert
Service 04

Monthly bookkeeping and reconciliations

Most e-commerce books fail in the same two places: deposits categorized as revenue with the fees buried, and channel and processor accounts that never get reconciled. Both compound, and by the time a lender application or a tax deadline forces the question, the profit number the owner has been watching all year is wrong.

How we handle it

We run your books on QuickBooks Online or Xero on a monthly cycle. Every transaction is categorized against a chart of accounts built for an online seller, every bank, credit card, and processor account is reconciled to the statement, and payroll from your provider is booked correctly. Channel settlements flow in through A2X so sales, fees, and refunds land in the right accounts automatically. You get a profit and loss statement, balance sheet, and cash flow summary on the same date every month, with a short note on anything that moved and one batched question list instead of a drip of emails.

Service 05

Platform fees, refunds, and chargebacks tracked

Platform commissions, payment processing, fulfillment and storage fees, ad spend, refunds, and chargebacks are a constant drag on margin, and when they are netted invisibly inside deposits, you never see how much they cost you. A store can look healthy on revenue and be barely profitable once the real cost of selling on each channel is counted.

How we handle it

We break out selling fees so every category is its own visible line: marketplace commissions, Stripe and processor fees, fulfillment and storage, ad spend, and the refunds and chargebacks that come back against sales. That turns the true cost of selling on Shopify versus Amazon versus a marketplace into a number you can compare, so you can price for it, decide which channels are worth the fees, and stop losing margin to costs you could not previously see.

Service 06

Books for inventory financing and raising money

Inventory financing, a credit line, or an equity round all require clean books that reconcile across every channel and carry real cost of goods. Books that net deposits to revenue, expense inventory on purchase, and never reconcile are exactly what makes a lender or investor walk, or drag out diligence for months.

How we handle it

We keep accrual-clean, channel-reconciled records with inventory on the balance sheet and real COGS in the P&L, which is what a lender underwriting against your stock or an investor pricing your growth expects to see. Gross margin, contribution by channel, and inventory turns are already in a form the other side will accept, so when you go to finance a purchase order, open a line of credit, or raise a round, your bookkeeping supports the deal instead of stalling it. The same practice that handles technical accounting for venture-backed and public companies stands behind the numbers.

Service 07

How we work with your store, month to month

A fair question before hiring any bookkeeper: what does the month actually look like from your side, and how do you reach us when something comes up?

How we handle it

The work is done in QuickBooks Online or Xero, read-only bank feeds, and connections to your sales and payment stack, including Shopify, Amazon, Stripe, and A2X for channel reconciliation, plus a shared inbox for anything else we need. You get a fixed monthly delivery date, a standing way to reach us, video calls when a conversation beats an email, and a CPA who answers within one business day. You also get a CPA-led team at a flat monthly price a solo bookkeeper cannot match on depth, keeping your books to the standard the rest of our practice works to.

FAQ

Frequently asked questions

Do you do bookkeeping for e-commerce and online sellers specifically?

Yes, e-commerce is a core part of what we do. That means reconciling multi-channel payouts back to gross sales, tracking COGS and inventory so your margin is real, and keeping sales tax economic nexus in view across states before it becomes a liability. We work with the platforms online sellers use, including Shopify, Amazon, Stripe, and A2X for channel reconciliation.

Can you reconcile Shopify, Amazon, and our payment processors?

Yes, this is the heart of e-commerce bookkeeping. Channel payouts arrive net of fees, refunds, chargebacks, and reserves, so we use A2X to map Shopify and Amazon settlements into your books and connect Stripe and other processors, then reconcile every payout to the bank. Your revenue ties to what you actually sold, and platform fees stop hiding inside deposits.

How do you handle COGS and inventory?

We account for inventory as an asset and move it to cost of goods sold as it sells, so your gross margin is real every period and you are not taxed on phantom profit from a big buying month. With product-level cost in place, you can see which SKUs actually make money instead of guessing at profitability.

Can you track sales tax nexus across states?

Yes. We track your sales by state so you can see where you are approaching or have crossed an economic nexus threshold before it becomes a liability, and we separate marketplace-facilitated sales that Amazon already remits from the sales that remain your responsibility. That way you register and file where you actually owe, not everywhere and not nowhere.

Do you integrate with Shopify, Amazon, Stripe, and A2X?

Yes. We connect Shopify, Amazon, and Stripe and use A2X for channel reconciliation, bringing sales, fees, and refunds into your QuickBooks Online or Xero books so every channel reconciles to the bank every month rather than living in separate dashboards that never agree.

How much does bookkeeping cost?

Flat monthly pricing based on your transaction volume, number of accounts, and whether you need cleanup first, not an hourly meter. Plans start at $350 a month. Tell us about your business and we will send a specific number, usually within one business day.

Which accounting software do you use?

Most of our clients are on QuickBooks Online, and it is what we recommend when a business is choosing a platform. We also work in Xero, and for larger or more complex companies, NetSuite and Sage Intacct. If you are on desktop QuickBooks, spreadsheets, or a shoebox, migrating to QuickBooks Online is part of setup, and you keep full ownership of the file.

Can you catch up books that are months or years behind?

Yes, and it is one of the most common ways engagements start. We rebuild from bank and credit card records, reconcile every account, and bring you current through the last closed month, then keep it current monthly. Cleanup is quoted as a one-time project alongside the monthly price.

What is your satisfaction guarantee?

If you are not fully satisfied in your first month, we refund that month’s bookkeeping fee, no hassle. That is up to a full free month to decide we are right for you. One-time catch-up and cleanup fees are non-refundable. See terms for details.

Our Guarantee

100% Satisfaction
Guaranteed

If you are not fully satisfied in your first month, we refund that month’s bookkeeping fee, no hassle. That is up to a full free month to decide we are right for you. One-time catch-up and cleanup fees are non-refundable. See terms for details.

Why Choose Us?

More Time for You to Run Your Business

Running a business means your time is best spent serving customers and growing, not reconciling accounts or chasing down last month’s numbers. We handle the day-to-day bookkeeping so you can stay focused on the work, with clean, reliable financials whenever you need them.

Get In Touch

Cost-Effective Financial Support

We understand how small businesses actually operate: uneven cash flow, job or project-based income, and expenses that do not fit neatly into a box. Our approach is practical and built around that reality, giving you numbers that reflect what is really happening in your business.

  • CPA-led, senior-reviewed
  • Tax-preparer ready year-round
  • Flat monthly pricing, no hourly meter
  • Support that grows with your business
Contact Us

Contact Us to Learn More

Call: (347) 472-1115
Email: info@corviniti.com

The best way to get started is to complete the form below. Tell us a bit about your business and we will advise on how best to get started.

We will get back to you within 24 hours.

Ro Sokhi, CPA
Ro Sokhi, CPA
Founder & CEO · Big Four experience · 20+ years

We will get back to you within 24 hours.