Welcome
A local-only PWA tax estimator + time tracker for 1099 work.
fiscode is a personal tool for estimating self-employment taxes, tracking time and mileage, and producing a clean year-end packet you can hand to an accountant. Everything runs in your browser: data lives in OPFS (origin-private file system), CSV files are the source of truth, and there is no backend.
Use at your own risk
fiscode is a personal project for personal self-employed tax planning. It is not legal, tax, financial, or accounting advice. Estimates are best-effort approximations based on annually-changing tax constants that may be stale or wrong. Always consult a qualified tax professional before filing or making financial decisions. No warranty, no support, no guarantee of accuracy. By using fiscode you accept full responsibility for any decisions made on the basis of its output.
Where to start
Design principles
- Local-only. No accounts, no sync, no telemetry. Close the tab and your data is still on disk.
- CSV as source of truth. Every entity round-trips through CSV; you can export, edit in a spreadsheet, and re-import without loss.
- Estimator, not filer. fiscode helps you plan quarterlies and prep for filing. It does not generate IRS forms or file on your behalf.