About

Shopfloor Math is an independent educational website for people who run or are starting a small business in the United States. It explains the calculations behind everyday business decisions, such as pricing, borrowing, hiring, taxes and cash flow, and offers calculators that show their formulas and assumptions.

The guides use plain English, worked examples with the arithmetic shown, and links to official sources such as the IRS, the Small Business Administration, the Consumer Financial Protection Bureau and the Federal Trade Commission. Examples use illustrative numbers and are labeled as such.

The site does not sell loans, insurance or tax filing services, and it does not provide tax, legal or investment advice. Rates, thresholds and rules change, and your situation may differ from the examples, so confirm important decisions with a CPA, attorney or lender and with the official source. The site does not rank lenders or software providers; comparison pages describe types of options and the criteria for choosing between them.

How this site is made

Shopfloor Math is an independent information project. Guides are drafted with the help of AI writing tools and checked against official and primary sources before publication; see our Editorial Policy. We are not affiliated with any provider mentioned on the site and do not sell products or services.