Accounting, sales tax and payroll for US businesses
SeroBooks watches economic nexus across all 50 states, depreciates assets with MACRS, and runs federal and state payroll on the Pro plan, all in one ledger.
US businesses, handled by Sero
Economic nexus in 50 states
SeroBooks watches your sales against economic nexus in all 50 states, so you see a new filing obligation coming.
US sales tax returns
Track sales tax by jurisdiction and prepare returns from the Sales Tax Centre.
MACRS depreciation
Fixed assets depreciate under MACRS in the same system as your books.
Federal and state payroll
SeroBooks Pro ($300/mo) runs US federal and state withholding in the same ledger as your accounting.
W-2 EFW2 and 1099-NEC
Produce W-2 EFW2 files for the SSA. 1099-NEC is supported as slips only.
POS that posts to the books
SeroPOS sales flow into SeroBooks, with QuickBooks Online and Xero sync available on SeroPOS Pro.
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.
Sales tax after economic nexus
Since states began taxing remote sellers on economic activity rather than physical presence, a growing online or wholesale business can owe sales tax in a state it has never set foot in. The hard part is noticing when you cross a threshold, not filing once you know. Thresholds differ from state to state, and they count sales from every channel you sell through.
SeroBooks watches economic nexus across all 50 states, measuring your sales by destination so you can see when you are approaching an obligation. Sales tax is tracked by jurisdiction on every invoice, and the Sales Tax Centre brings it together when returns are due. You decide when to register and file. SeroBooks gives you the numbers to make that call early.
- Economic nexus watched in all 50 states
- Sales tax tracked by jurisdiction
- Sales Tax Centre for preparing returns
- Marketplace-facilitator tax split for Amazon sales
Payroll in SeroBooks Pro
US payroll lives inside SeroBooks Pro, at $300/mo per business, with federal and state withholding calculated in the same ledger as your accounting. Each pay run posts to the general ledger, so wage expense and liabilities appear in your books without a separate import. Because payroll and sales share one ledger, labour cost shows up in the same financial statements as revenue.
At year-end, SeroBooks produces W-2 files in the SSA’s EFW2 format. 1099-NEC is supported as slips only. SeroPayroll, the standalone payroll product, is Canada-only, so US employers should look at SeroBooks Pro for payroll. Keeping payroll inside the accounting system also means one login, one set of permissions and one audit trail for the people who handle wages. Your CPA reviews payroll entries in the same place as everything else.
Books that hold up at tax time
SeroBooks is one double-entry ledger across 13 modules, with 160+ built-in reports and a custom report builder. Fixed assets depreciate under MACRS, closed periods lock, and the audit trail on Pro records every change. Your CPA gets a free practice seat with its own login. That seat costs you nothing.
Projects, classes and job costing on Pro let service firms and contractors see profit by job. Multi-company support handles owners who run more than one entity, and the penny-verified export makes a hand-off to an outside accountant simple. Budgets, cash-flow projections and a loan manager round out the planning side for owners who want to see a few months ahead.
Inventory and marketplace sellers
For US product businesses, inventory sits in the same ledger as the money. SeroBooks tracks serial numbers, batches and expiry, warehouse bins, landed cost and stock valuation, with demand forecasting that accounts for two lead times. Purchase orders, goods received and supplier payment runs complete the buying side. Receipt scanning turns a photo of a supplier invoice into a draft bill.
Amazon.com sellers can add SeroBooks for Amazon at $150/mo, which posts settlements, itemises fees, splits marketplace-facilitator tax and puts Amazon Ads spend and TACOS on the P&L. Card payments run through Stripe, Global Payments or Moneris terminals. Sales on Amazon.ca and Amazon.com.mx can sit in the same books if you sell across borders, with SeroBooks for Amazon covering North America.
- Serial, batch and expiry tracking
- Landed cost on imported goods
- Demand forecasting with two lead times
- Amazon settlements and Ads on the P&L
Point of sale for US stores and restaurants
SeroPOS runs on iPhone, iPad, Android, Windows and Mac, with per-business currency and 16 interface languages, including Spanish. Restaurants get modifiers, split bills, floor plans and kitchen display; retailers get barcode scanning, lot and expiry tracking and purchase orders. Offline mode keeps the counter running if the connection drops, and orders sync when it returns.
SeroPOS Standard is $29.99/mo and Pro is $49.99/mo, with a 14-day free trial and no credit card. Sales post to SeroBooks, or to QuickBooks Online or Xero on SeroPOS Pro, so the counter and the ledger agree at the end of every day. Card-present payments run through Global Payments, Moneris or Gravity Payments terminals.
Frequently asked questions
Does SeroBooks track economic nexus?
Yes. SeroBooks watches economic nexus across all 50 US states based on your sales, so you can see when you are approaching a threshold that may create a filing obligation. Sales tax is tracked by jurisdiction, and the Sales Tax Centre helps you prepare returns. Amazon sales are split for marketplace-facilitator tax.
Can I run US payroll with Sero?
Yes, in SeroBooks Pro at $300/mo per business. It calculates federal and state withholding, posts each pay run to the general ledger and produces W-2 files in EFW2 format. 1099-NEC is supported as slips only. SeroPayroll, the standalone product, is for Canadian payroll and does not cover US employees.
Does SeroBooks support MACRS depreciation?
Yes. The fixed-asset register in SeroBooks supports MACRS for US businesses and CCA for Canadian ones. Depreciation is calculated in the same ledger as the rest of your accounting, so your CPA sees consistent figures at year-end. Period locks keep closed years from changing after you file.
Which SeroBooks plan should a US business choose?
Starter at $79.99/mo and Standard at $150/mo cover core accounting, inventory and sales tax with 5 users and 1 location. Pro at $300/mo adds US and Canadian payroll, forecasting, job costing and the audit trail, with 6 users and 3 locations. All prices are USD with a 14-day trial.
Does SeroPOS work in the United States?
Yes. SeroPOS runs on iOS, Android, Windows and macOS, supports per-business currency and 16 languages, and connects to Stripe, PayPal and card terminals from Global Payments, Moneris and Gravity Payments. It syncs with SeroBooks, and SeroPOS Pro also syncs with QuickBooks Online and Xero.