Trust & Security
How WriteOffCoach handles your data and produces reliable results.
WriteOffCoach helps organize and analyze expenses using supported tax rules, but it is not a law firm, CPA firm, or substitute for professional tax advice. Always review results with a qualified tax professional before filing.
Rules-first engine
Every deduction recommendation is driven by versioned, authoritative tax rules — not AI inference alone. If a claim can't be supported by a rule, it won't be shown.
3-layer verification
AI classifications pass through an independent rules engine and a final audit check before any result reaches you. No single model decides your deductions.
Data privacy
Your purchase data is stored in encrypted Supabase Postgres with Row Level Security. Raw upload ZIPs are deleted within 24 hours of successful parsing.
Full citation trail
Every deduction includes at least one tax authority citation (IRC section, Treasury regulation, or IRS publication) so your CPA can verify it independently.
What we never collect
- Social Security Numbers or government-issued IDs
- Bank account numbers or passwords
- Full credit card numbers
- Tax return data (we analyze purchases, not returns)