Licenses

Halfmark's own code, design, logo and content are proprietary: © 2026 Halfmark. All rights reserved. The sample files offered in the app describe a fictional company and fictional people; any resemblance to real businesses or persons is coincidental.

Government sources

The Treasury Tipped Occupation Code list and quotations from IRS publications and the Code of Federal Regulations are U.S. government works.

Third-party software

Halfmark uses the following open-source components, served from this website (not from third-party servers):

• SheetJS Community Edition (xlsx) 0.20.3, mini build — reads .xlsx and .csv files in the browser. © SheetJS LLC. Apache License 2.0. License text.
• jsPDF 4.2.1 — PDF generation in the browser. © James Hall, yWorks GmbH and contributors. MIT License. License text. The bundled file includes other open-source code under MIT/Zlib licenses (such as fflate); see third-party licenses.

The logo wordmark is drawn from the Inter typeface (SIL Open Font License 1.1).