10 Free Online Tools Every Small Business Owner Should Bookmark

1) Invoice Generator — create professional invoices in minutes. 2) Self-Employment Tax Calculator — know what you owe quarterly. 3) Mileage Deduction Calculator — track miles for the IRS deduction. 4) Profit Margin Calculator — price your products correctly. 5) Break-Even Calculator — know your minimum sales target. 6) Currency Converter — for international clients. 7) Time Tracker — log billable hours. 8) Loan Amortization — model debt payoff. 9) Sales Tax Calculator — collect the right amount per state. 10) Compound Interest Calculator — model business savings growth. All free, no signup, no ads on the tools themselves.