Business
Invoice Generator
Create a clean, printable invoice in your browser, calculate tax and totals, and save the finished invoice as a PDF without creating an account.
Open toolBusiness
Running a small business often means stopping what you are doing to calculate a fee, prepare an invoice, or check what a price really leaves you after costs. The Business tools on Probably Useful are built for those small operational tasks: quick enough for a one-off job, but clear enough that you can see what the result means.
Use these tools for estimates, planning, and simple admin work, then follow the supporting guides when you need the formula, assumptions, or a more complete explanation. For accounting, tax, legal, or contractual decisions, verify the result against the rules and records that apply to your business.