Numeral, a San Francisco startup that automates sales tax compliance, has raised a $100 million Series C led by Insight Partners. Salesforce Ventures and Geodesic joined, along with existing investors Benchmark, Mayfield, FCVC, Y Combinator and Uncork. The company was founded in 2023 and has now raised $157 million.
Sales tax used to be a problem only for big retailers. Then the 2018 South Dakota v. Wayfair ruling let US states tax out-of-state sellers once they cross a sales threshold. Since then any company selling across state lines can owe tax in dozens of places, each with its own rates, rules and filing calendar. Most finance teams still handle this in spreadsheets.
“Sales tax has become a much bigger operational challenge as companies grow across markets, systems and business models,” says co-founder and CEO Sam Ross.
What Numeral does
The platform covers the whole job. It watches where a company has triggered nexus, handles state registrations, calculates tax on each transaction, files returns, sends payments and manages exemption certificates. Outside the US it handles VAT and GST in more than 90 countries. It connects to 40+ billing and ERP systems.
Numeral says customers spend up to 80% less time on filings and registrations. It says manual spreadsheet work and filing errors fall by up to 95%. Exemption certificate management alone can save a company up to 400 hours a year.
Growth and plans
Transaction volume through the tax engine grew 327% year over year, and Numeral expects to process more than 80 million transactions. Much of the new demand comes from software, distribution and manufacturing companies. The money goes toward product, toward deeper coverage for manufacturing and wholesale, and toward hiring. Numeral is also launching a partner program so accounting firms can refer, resell and advise on the product.
Ross leads the company with CTO Matt DuVall. Insight’s bet is simple. Tax compliance is a boring, rules-heavy job, and that’s exactly where AI agents earn their keep.