Know where you stand on state tax residency — before it costs you.

TaxRoost resolves your location on your phone and logs which state or country you were in each day, automatically, using low-power location. It applies the counting conventions that matter, like any part of a day for most states, and flags border days that need a check. It never uploads your coordinates; the resolved day and place sync to your account.

Every US state (plus DC), with each state's day line where it has one. Abroad, TaxRoost automatically counts your days in 12 countries — the US, Canada, Mexico, the UK, France, Germany, Spain, Portugal, Italy, the UAE, Australia and Japan (you can add days anywhere else by hand) — plus a rolling Schengen 90/180 clock and the US federal Substantial Presence Test.

No. Many income-tax states have a statutory-residency test — commonly more than 183 days there plus keeping a permanent place of abode — but the number and details vary by state, and some, such as California, have no bright-line day count at all (Florida and Texas have no personal income tax). Where there's no day line, residency turns on domicile and other facts. TaxRoost shows each state's day line where one exists; a tax professional should confirm how it applies to you.

In most states with a day test, any part of a day spent there generally counts, with limited exceptions that vary by state. TaxRoost applies each state's counting convention and marks uncertain days, like border crossings, as needing a check.

It's built not to. TaxRoost uses low-power location — visits and significant-location changes, not constant GPS — so day tracking runs in the background with minimal battery use.

The iPhone app does the automatic day tracking — the part only your phone can do. The web app at app.taxroost.com is for reviewing your year on a big screen, running reports, and sharing a read-only view with your CPA. It's one account, synced across both.

Not yet. Automatic tracking needs the iPhone app (iOS 17 or later). The web app at app.taxroost.com works in any browser for reviewing days and reports, but it can't track location.

Yes. TaxRoost rebuilds the days you've already spent this year from your photos, calendar and workouts — right on your phone — so trips your GPS never saw can still show up when a photo, calendar event or workout places you there.

TaxRoost doesn't store planned trips. It projects your year-end pace from the days you've logged, and you can see how skipping days would change it.

Yes. Your location is resolved on-device, so it keeps logging days even with no signal, in every state and the countries TaxRoost covers. Your records sync to your account when you're back online.

Location history is a map of dots. TaxRoost turns it into a day-by-day residency record — each state's counting rules, a live count against the limits you set, uncertain days flagged for a check, and a report package your CPA can use.

Your exact location is processed on your phone and never leaves it. TaxRoost saves the derived day and place to your account — not your raw coordinates. Photos it reads to rebuild past days stay on your phone; a photo or file you choose to attach to a day as evidence is stored with your account.

Only if you invite them. You add your CPA's email in the console; when they sign in to TaxRoost, they get read-only access to your day counts and reports — and you can revoke it at any time.

TaxRoost is free to start — automatic day counting, live gauges, alerts you set and CSV export, for up to 3 watched jurisdictions. Pro is $39.99/year or $4.99/month and adds PDF and Excel report packages and unlimited watched jurisdictions.

It can help your CPA respond, but no app can guarantee an outcome. Pro builds a report package — a per-state day-count summary plus a day-by-day ledger with any evidence you attached — sealed with a content hash that TaxRoost also stores, so a CPA with access can check the file hasn't changed since export. The seal shows integrity; it isn't a signature or proof of where you were.

No. TaxRoost is a record-keeping tool, not tax or legal advice. Residency is complex and fact-specific — confirm your position with a qualified tax professional.