Work from anywhere. Track every day.
Working remotely from multiple states triggers state nexus, withholding obligations, and potential double taxation. Tax Days tracks every state you spend time in, projects when you'd cross residency or de-minimis thresholds, and exports audit-ready records.
What you're up against
Convenience-of-employer states tax you anyway
If your employer is in NY, NJ, NE, PA, DE, AR, OR, or CT and you 'work from FL for your convenience,' your old state may still tax 100% of your wages.
State source income for non-residents
Work 30 days from California, CA wants tax on 30/250 of your wages. Most states have a de minimis (CA = 0, MA = 10, IL = 30), and some have none.
Your remote work creates employer nexus
Your presence creates state-tax obligations for your employer. Big companies handle it; small ones may push back if it's surprise work.
Vacation work-from-anywhere can become 50+ days
10 trips × 5 days each = 50 days. Many states' de minimis is below that. Suddenly you owe a non-resident return.
What Tax Days does for you
Tracks every state where you spend time, with day-count totals per state.
Handles the difference between residence-state day count and work-state day count.
Projects when you'd cross a state's de-minimis threshold (10 days, 23 days, 30 days, 183 days).
Tracks your home-state residency threshold simultaneously (184 for NY/NJ/MA/CT, 9-month for CA, etc.).
Exports a per-state PDF with day count and trip log, what your accountant needs for non-resident returns.
Notifies you 7, 3, and 1 days before you'd cross any threshold.
Stays on your iPhone. No servers, no accounts. Optional iCloud sync.
The rules you actually need to track
Multi-state remote work guide
Convenience-of-employer rules, state-source income, de-minimis thresholds, and how to defend your filing.
Read the guide →New York 184-day rule
If you work remotely for a NY-based employer, NY can tax 100% of your wages even if you live in FL.
Read the guide →California's 9-month rule
Working remotely from CA for any extended period triggers California's facts-and-circumstances test.
Read the guide →Texas residency for tech workers
0% state income tax. Establishing TX domicile while still doing trips back to CA, NY, or MA needs careful tracking.
Read the guide →Florida domicile guide
Move to FL, document the move, but track every day back at the old-state office. Your old state will audit.
Read the guide →Defending a residency audit
What to expect when your old state targets your departure: timeline, evidence, defense pillars.
Read the guide →
Free guides and tools
- Guide
Remote worker multi-state tax guide
Convenience-of-employer states, de-minimis thresholds per state, employer documentation that helps your defense.
- Calculator
Free 183-day rule calculator
Track any state's threshold, 184 for NY/NJ/MA/CT, custom thresholds for de-minimis state-source rules.
- Guide
Records auditors actually accept
Why a contemporaneous day log is far more credible than a reconstruction from credit-card swipes.
- Guide
What records you need for a residency audit
The complete list: travel records, cell records, EZ-Pass, calendar entries, lifestyle evidence.
Common questions
Can working remotely from another state make me a tax resident there?
It can, if you stay long enough or put down roots. Many states treat you as a statutory resident once you keep a place to live there and cross a day threshold (often 183 or 184 days). Shorter stays can still create nonresident filing obligations for income earned while working in the state.
What's the difference between domicile and statutory residency?
Domicile is your one true home, judged by facts like where your home, family, and life are centered. Statutory residency is mechanical: enough days plus a place to live. You can be domiciled in one state and a statutory resident of another in the same year, which is how double taxation happens.
How many days can I work from another state before it matters?
There is no single safe number: a handful of states have explicit day thresholds for residency, and rules for nonresident income tax can start from the first working day. What protects you is a clean record of where you worked, so you can answer precisely rather than guess.
Do I need to track days if I never stay anywhere long?
Yes, that's exactly when a record matters. If your year is spread across several states, no single state is obviously home, and the state you left has the incentive to argue you never really left. A day log is the evidence that settles it.
Built for work-from-anywhere
Tax Days tracks the days that decide which state taxes you. £19.99/year covers it, far less than one missed audit.
