Free Freelance & Small Business Calculators
Free financial calculators for freelancers and small businesses.
- Freelance Hourly Rate Calculator | TalkInvoice AI — Find the hourly rate you need to charge to hit your income goal after taxes, expenses, time off and unbillable hours. Free, no signup.
- Markup vs Margin Calculator (Free) | TalkInvoice AI — Convert between markup and margin or find your selling price. Enter cost plus markup, margin or price and see profit, markup % and margin %.
- Sales Tax Calculator by State (2026) | TalkInvoice AI — Calculate sales tax for any US state using 2026 state and average local rates, or enter your own rate. Add tax to a price or find the tax inside a total.
- Late Fee Calculator for Invoices | TalkInvoice AI — Calculate late fees on an overdue invoice: flat fee or percentage with a grace period, total amount due, and invoice terms wording. Free, no signup.
- Invoice Due Date Calculator (Net 30, 60) | TalkInvoice AI — Find an invoice due date for Net 7, 15, 30, 45, 60, 90 or EOM terms, with optional business-day adjustment and early-payment discount dates.
- Quarterly Estimated Tax Calculator (2026) | TalkInvoice AI — Estimate your 2026 self-employment tax and quarterly estimated tax payments with federal brackets, safe harbor amounts and due dates. Not tax advice.