Tools
Free Early Payment Discount Calculator: Is 2/10 Net 30 Worth It?
Calculate the savings from an early payment discount like 2/10 net 30 and the annual interest rate you give up by paying late, with a table of common terms.
Online Sellers
Selling online can be a hobby, a side business or a full-time shop. These guides explain when sales are taxable and how to report them.
8 guides about “Online Sellers”.
Tools
Free Break-Even Calculator: Units and Sales to Break Even
Calculate your break-even point in units and sales from fixed costs, price and variable cost per unit, and see the sales you need for a monthly profit goal.
Tools
Free Profit Margin Calculator: Margin, Markup and Selling Price
Calculate profit margin and markup from cost and price, or find the selling price for a target margin, with formulas and a margin vs. markup conversion table.
Tools
Free Sales Tax Calculator 2026: Add or Remove Sales Tax
Add sales tax to a price, remove it from a total or find the rate, with the July 2026 state sales tax rates for all 50 states and Washington, D.C.
Tools
Free Credit Memo Generator: Create a PDF Credit Memo
Create a credit memo for a return, an overcharge or a price adjustment, linked to the original invoice and with sales tax, and download it as a professional PDF for free.
Tools
Free Receipt Generator: Create and Download a PDF Receipt
Make a professional payment receipt in a minute, with items, sales tax, payment method, a PAID stamp and an optional signature line, then download it as a free PDF. Partial payments and deposits are shown correctly.
Taxes
eBay 1099-K: Do You Pay Taxes on Selling Used Items Online?
Got a 1099-K from eBay or Poshmark? Selling your own used items at a loss is not taxable, but you still report it. Learn the thresholds, the IRS method and the rules for resellers.
Taxes
Etsy Taxes: 1099-K, Sales Tax and Deductions for Etsy Sellers
Selling on Etsy? Learn when Etsy sends a 1099-K, how Etsy income is taxed, which seller deductions and costs of goods you can claim and how the hobby rules work in 2026.