White-Label Calculator Kit for Accounting Firms

White-Label Calculators for Accountants, Bookkeepers and Consultants

Put branded calculators on your own website: your firm name, logo, colors and a booking button. Visitors get a useful tool; you get the inquiry. Each calculator is a single paste-in HTML block for WordPress, Squarespace, Wix or Webflow, runs entirely in the visitor's browser and sends no data anywhere.

The White-Label Calculator Kit ($29 single site, $79 for 5 sites): Email us for early access

What's in the kit

Branding is one short config block at the top of each file. No hosting, no subscription, no attribution required. The license covers 1 site ($29) or 5 sites ($79), and you can't resell the files.

Live demo: branded with a made-up firm

Example firm. "Northfield Tax & Books" below is made up to show the branding. It is not a real business and the button goes nowhere.

Quarterly Estimated Tax Calculator (2026)

Filing status

Expected 2026 self-employment profit ($)

W-2 wages, if any ($)

Other income ($)

Tax withheld from wages this year ($)

Last year's total tax, optional ($)

Used for the prior-year safe harbor.

Last year's AGI was over $150,000 ($75,000 if married filing separately)

Break-Even Calculator

Fixed costs for the period ($)

Rent, software, insurance, salaries: costs that don't change with sales. Use one period (for example a month).

Selling price per unit ($)

Variable cost per unit ($)

Materials, packaging, payment fees, shipping per sale.

Guides for firm websites

Want it set up for you?

Lanternhill Studio can install and brand the calculators on your site as part of a website project.

Want more than a quick fix?

Tax-Season Spreadsheet Bundle ($19 on Gumroad): mileage log, 1099 income tracker, expense categorizer and year-end summary in one workbook, plus the standalone Mileage Log 2026, 1099 Income Tracker 2026 and Monthly Budget templates (blank and sample copies of each). Not tax advice. Launch price: $14 with code LAUNCH14 through Nov 15, 2026.
Just need invoices? The Invoice + Estimate + Payment Tracker ($7 on Gumroad): estimates, printable invoices, a payment log and an unpaid/overdue view, for Excel and Google Sheets (blank and sample copies).