Accounting and inventory software for e-commerce brands
SeroBooks keeps inventory, sales tax and channel payouts in one ledger, with Amazon and Stripe connected directly and Shopify or WooCommerce syncing through SeroPOS.
E-commerce brands, handled by Sero
Amazon in the ledger
SeroBooks posts Amazon settlements with fees, ads and marketplace-facilitator tax broken out.
Stripe payouts reconciled
Stripe connects to SeroBooks so card payouts tie back to the sales and fees behind them.
Shopify and WooCommerce via SeroPOS
SeroPOS syncs two-way with Shopify and with WooCommerce, keeping products and stock aligned across channels.
Inventory that is real inventory
Stock valuation, landed cost, batches, serials and assemblies for kits and bundles.
Economic nexus watched
SeroBooks watches US economic nexus thresholds in 50 states and handles Canadian GST/HST/PST/QST.
Forecast and reorder
Demand forecasting with two lead times helps plan production runs and inbound stock.
One company, one login, three products that share their numbers
SeroBooks
The books, the store, the bank. One ledger.
Accounting that runs the whole business — invoicing, inventory, banking, sales tax, payroll and year-end for Canada and the United States.
SeroPOS
The point of sale built for the rush.
Point of sale for restaurants and retail — tables, kitchen tickets, inventory, loyalty and online ordering on iPad, Android, Windows and Mac.
SeroPayroll
Payroll for every province. Right to the cent.
Canadian payroll for all 13 provinces and territories — CPP, EI, QPP, vacation, stat holidays, remittances, T4s and ROEs.
The problem with channel-by-channel bookkeeping
A brand selling on its own site, on Amazon and at the occasional pop-up ends up with money arriving from several processors, stock spread across a warehouse and FBA, and a sales tax footprint that grows quietly with every state or province it ships to. Booking each payout as a lump sum hides fees, refunds and tax inside one number.
SeroBooks puts all of it on one double-entry ledger. Amazon settlements and Stripe payouts post with their components, inventory moves are recorded as they happen, and sales tax is tracked by jurisdiction. The result is a P&L by channel you can trust and a balance sheet that matches the warehouse.
How the channels connect
Sero splits the job between two products. SeroBooks connects directly to Amazon through the Selling Partner API and Amazon Ads, and to Stripe. SeroPOS handles storefront sync: a two-way Shopify integration, WooCommerce, Amazon and ShipStation for shipping labels, plus an online catalogue with cart and checkout if you want a simple store of your own.
SeroPOS includes double-entry accounting and syncs to SeroBooks, so orders that come in through Shopify or WooCommerce land in the same ledger as your Amazon and Stripe activity. If you sell in person at markets or a showroom, the same SeroPOS app takes those payments too. You can grow into more channels without rebuilding your bookkeeping each time.
- Amazon and Amazon Ads: direct to SeroBooks
- Stripe: direct to SeroBooks
- Shopify (two-way) and WooCommerce: through SeroPOS
- ShipStation: through SeroPOS
- In-person sales: SeroPOS on iPad, Android, Windows or Mac
Inventory, kits and landed cost
SeroBooks treats inventory as inventory, not a list of SKUs. Stock valuation, warehouse bins and transfers keep counts honest across locations. Assemblies let you build gift sets, bundles or kits from component stock, so selling a bundle relieves the right components and cost of goods sold stays accurate. Stock at your warehouse and stock sent to Amazon are both visible in the same reports.
Landed cost spreads freight, duty and brokerage across units from each shipment, which matters for brands importing from overseas manufacturers. Batch and expiry tracking covers cosmetics, supplements and food, and serial numbers cover electronics. Foreign-currency bills handle suppliers who invoice in other currencies. That keeps cost of goods accurate for every product you import.
Sales tax and economic nexus
In the US, selling online can create sales tax obligations in states where you have no physical presence once you pass their economic nexus thresholds. SeroBooks watches economic nexus across 50 states so you can see when you are approaching a threshold, and handles US sales tax on your invoices.
Canadian brands get GST/HST, PST and QST for every province and a Sales Tax Centre for preparing returns. Where Amazon collects tax as marketplace facilitator, SeroBooks separates that from tax you owe yourself, so your returns and revenue are not overstated. Filing gets simpler when every channel’s tax is already sorted by jurisdiction.
- Economic nexus watched in 50 US states
- GST/HST, PST and QST for every province
- Marketplace-facilitator tax split for Amazon
- Sales Tax Centre for returns
Planning, people and growth
Demand forecasting with two lead times, one for production and one for shipping, helps time reorders so you are not paying to store excess or losing sales to stockouts. On SeroBooks Pro, forecasting is included, and Maya, the AI employee in SeroBooks, can draft purchase orders and reorder points for your approval.
As the team grows, SeroPayroll runs Canadian payroll from $25 USD a month for up to 10 employees, and SeroBooks Pro at $300 USD a month adds payroll for Canada and the US, job costing and an audit trail. Roles and permissions are enforced on the server, so contractors and staff see only what they need.
Frequently asked questions
Does SeroBooks integrate with Shopify?
Shopify sync is a SeroPOS feature rather than a direct SeroBooks integration. SeroPOS syncs two-way with Shopify and also connects to WooCommerce, Amazon and ShipStation. SeroPOS then syncs into SeroBooks, so your Shopify orders end up in the same ledger as your Amazon and Stripe activity.
What does SeroBooks connect to directly?
SeroBooks connects directly to Amazon through the Selling Partner API, to Amazon Ads, and to Stripe. It also works with Global Payments and Moneris card terminals, bank CSV import with rules, and Plaid bank connections, which are rolling out. QuickBooks Desktop and QuickBooks Online imports are available for switching.
Can SeroBooks track economic nexus?
Yes. SeroBooks watches economic nexus thresholds across 50 US states so you can see where your online sales may be creating a sales tax obligation. It also handles US sales tax on invoices and Canadian GST/HST, PST and QST, with a Sales Tax Centre for preparing returns.
Can I sell bundles and kits?
Yes. SeroBooks supports assemblies, so a bundle or gift set can be built from component items. When it sells, the components are relieved from stock and cost of goods sold reflects their actual cost. Landed cost, batches, expiry dates and serial numbers are also supported for brands that need them.
Which plan should an e-commerce brand choose?
If Amazon is your main channel, SeroBooks for Amazon at $150 USD a month includes the Amazon tools. Brands that sell mostly through their own site often start on Starter at $79.99 or Standard at $150 USD a month, adding the Amazon module for $100 USD a month if needed. Pro at $300 adds payroll and forecasting.