Remote Work State Taxes for Tech Employees

Moving to Texas or Washington and working remotely for your San Francisco employer should eliminate state income tax on your salary. In most cases it does. But the tax picture for remote tech workers is more complicated than "I live in a zero-tax state, so I pay zero state taxes" — and the complications tend to cluster exactly where tech workers' income is largest: equity compensation and high-comp employers in aggressive sourcing states.

Two problems drive most of the complexity. First, seven states enforce a "convenience of employer" rule that can source your remote work income back to your employer's state even if you never show up there. Second, California's nonresident sourcing rules follow RSU vests, ISO exercises, and NSO exercises across state lines based on where you worked during the grant-to-vest period — not where you live when the vest happens. A California-to-Texas relocator with a 4-year RSU grant made two years before the move still owes California income tax on roughly 50% of each future vest.

This guide explains both problems, how multi-state credits reduce (but don't eliminate) double taxation, and what records you need to defend your position in an audit.

The convenience of employer rule: 7 states that tax remote workers at home

Normal state tax logic says your wages are taxed where you physically perform the work. If you're in Austin, Texas performs the work. Texas taxes it (at 0%). Your New York employer's location is irrelevant.

The convenience of employer rule inverts this. Under these rules, if you're working remotely for your own convenience — not because your employer requires it — your remote work income is treated as if you performed it at your employer's office, in your employer's state. Seven states enforce some version of this rule in 2026:¹

New York: the strictest enforcer

New York's convenience rule is the most aggressive and the most litigated. The New York Tax Department presumes that all remote work by a New York employer's nonresident employee is performed for the employee's convenience — not business necessity. This presumption can be rebutted, but the burden is entirely on the employer, and New York rarely accepts it.¹

New York actively audits high-income remote workers. If your W-2 shows a New York employer and you file as a nonresident, expect scrutiny. The state has successfully litigated this position in multiple Tax Tribunal cases. If you're earning $300K+ from a NY-based employer while living elsewhere, talk to a tax advisor before assuming you owe nothing to New York.

See the New York equity tax guide for a full breakdown of NY rates, the NYC city tax, and the convenience rule's impact on equity compensation specifically.

Connecticut's reciprocal rule

Connecticut takes a narrower approach: its convenience rule applies only when the employee's home state also enforces a convenience-of-employer rule. A Connecticut employer with a remote worker in Texas (no income tax) doesn't trigger Connecticut's rule — Texas can't impose a competing convenience rule, so the reciprocity mechanism has nothing to reciprocate. But a Connecticut employer with a remote worker in New York — where New York would also try to source the income under its own convenience rule — can invoke CT's version to claim its share.²

The employer necessity exception

Every convenience-rule state provides an exception: if the employer requires remote work for legitimate business reasons — not employee preference — the remote work income is not sourced to the employer's state. The burden of proof falls on the employer. What works:

• Written documentation, dated before or contemporaneous with the remote arrangement, signed by a VP-or-above manager
• Specific articulation of why this role requires being in the specific non-employer-state location (proximity to clients, specialized equipment at the home location, cost of employer-state office space for this function)
• Not generic remote-work policy language that applies to all employees

What doesn't work: "We allow remote work." "Employee requested to work from home." "Company-wide hybrid policy."

In practice, the employer necessity exception is difficult to obtain in New York specifically. If your employer's legal and HR teams won't produce documentation of business necessity, assume you're subject to the convenience rule and plan accordingly.

California's long-arm equity sourcing rule

The convenience rule is mainly a wages problem. California's long-arm sourcing rule is mainly an equity problem — and it affects tech workers disproportionately because tech compensation is equity-heavy.

California allocates RSU, NSO, and ISO income to California based on where you worked during the vesting or service period, not where you live when the taxable event happens.³ The formula:

This rule applies regardless of where you now live. A California-to-Texas relocator with a 4-year RSU grant received 2 years before their move still has approximately 50% of every future vest sourced to California. They owe California income tax on that 50% — at California's 13.3% top rate — as a nonresident, and must file Form 540NR each year those vests occur.

The California claim shrinks over time. Once a grant's entire vesting period consists only of post-move workdays, there's no California component. If you move two years into a 4-year grant, the California share of each vest stays at approximately 50% for the remaining two years — then falls to 0% for any new grants made after your move. This is the structural benefit of moving: future grants are entirely outside California's reach.

See the California equity tax guide and Texas equity tax guide for detailed worked examples of the grant-to-vest allocation calculation and what establishing genuine Texas domicile requires.

De minimis thresholds: when physical travel triggers a filing obligation

The convenience rule is about your regular remote work arrangement. A separate question is whether occasional travel — flying to company HQ, attending an on-site, visiting clients — triggers a tax obligation in the visited state.

Many states have de minimis thresholds: you don't trigger a state income tax filing obligation until you've worked in the state more than a minimum number of days. Many other states have no threshold at all — California and Massachusetts technically require withholding and filing from the first day you work physically in the state, regardless of how briefly.⁴

The Multistate Tax Commission has proposed a model 20-workday threshold; the federal Mobile Workforce State Income Tax Simplification Act would create a uniform 30-day threshold. Neither is law. As of 2026, there is no federal standard, and state rules remain fragmented.⁴

When you owe tax in two states — and how credits work

Multi-state taxation is largely prevented from becoming genuine double taxation by two mechanisms: reciprocal agreements and resident-state credits.

Reciprocal agreements

About 30 state pairs have bilateral reciprocal agreements: you pay income tax only in your state of residence, even if your employer is in the other state. Common examples include Virginia-DC-Maryland-Pennsylvania and various Midwest state pairs. The agreement cuts through withholding complexity and eliminates duplicate filing for most workers in those pairs.

For tech workers, the relevant fact is what's missing: New York has no reciprocal agreement with California, and California has no reciprocal agreements with any major tech-hub state. The convenience rule and cross-state equity sourcing disputes live entirely outside the reciprocal-agreement safety net.

Resident-state tax credit

Your state of domicile typically gives you a credit for income taxes paid to another state on the same income — dollar for dollar, up to your home state's tax rate on that income. This prevents full double taxation.

The catch: if your home state's rate is lower than the other state's rate, or if your home state has no income tax, the credit is zero — and you pay the full non-resident tax with no offset. A Texas resident paying New York income tax under the convenience rule gets no Texas credit, because Texas has no income tax. A Florida resident in the same situation similarly gets no offset. The full New York tax is the cost of working for a New York employer while living in a zero-income-tax state.

If your home state has a high income tax rate, the credit typically prevents true double taxation — you pay the higher of the two states' effective rates, not the sum. A California resident paying New York income tax gets a CA credit for NY taxes on the same income, capped at the California rate on that income. Since California's rate is higher than New York's for most tech incomes, the net result is you pay California's rate with a partial offset for New York taxes already paid.

Statutory residency: New York's 183-day trap

Most states tax you as a resident if you're domiciled there. New York (and a few others) also tax you as a resident under a separate "statutory residency" rule: if you maintain a permanent place of abode in New York and spend 183 or more days in New York in the tax year, you're taxed as a New York resident on your worldwide income — even if your domicile is elsewhere.¹

This creates a trap for tech workers who maintain a New York apartment (for frequent visits, a pied-à-terre for company travel) while living elsewhere. If you spend 184 nights in that New York apartment in the tax year, New York treats you as a resident — taxing your California salary, your Texas RSU vests, and everything else at full New York resident rates. Your actual domicile state also taxes you as a resident on the same income. Credits reduce the overlap but often don't eliminate it entirely.

If you're domiciled outside New York but maintain New York housing and spend substantial time there, count your days carefully. The 183-day test applies even to short overnight stays.

Changing domicile: what it actually requires

Simply moving your body to a new state isn't enough to establish domicile. California and New York both audit high-income domicile changes aggressively — particularly when the claimed move saves seven figures of state tax. Contemporaneous documentation matters:³

• New state driver's license and vehicle registration obtained within 30 days of move; California or New York license surrendered
• Voter registration change
• Change of mailing address with IRS, employer, brokerages, and financial institutions
• Part-year resident return for the move year (e.g., Form 540 for a California mover), clearly reflecting the move-out date
• Nonresident return for each subsequent year you receive California-sourced equity income from pre-move grants
• Minimizing old-state workdays after the move — every California day you work is counted in future RSU allocation calculations and signals ongoing California ties
• Selling or genuinely converting to rental any property in the old state — maintaining a home you could return to weakens the domicile argument substantially

The FTB applies the "closer connection" test: you must be more connected to your new state than to California as of your claimed move date. If your family remains in California, your children stay in California schools, or you maintain an active California property, the FTB may successfully argue that your domicile didn't actually change when you claimed.

What records to keep

Multi-state tax compliance runs on contemporaneous records. States that audit remote workers — New York and California especially — will ask for documentation you cannot reconstruct after the fact.

Work-location log

A daily log of where you physically worked. For each workday: date, city and state, type of work performed. Useful corroborating evidence includes hotel receipts, airline boarding passes, badge-in records, and timestamped calendar entries. This log is the foundation for any nonresident allocation dispute and documents the days you did or did not work in a high-tax state.

California workday count for active grants

For every RSU grant you received while living in California, you need the grant date and the CA workdays from grant date to each vest event. This determines your California-source income for each vest. If your company tracks work location in an HR system, request a report. If not, maintain your own log and reconcile it with company calendar data.

Employer necessity documentation

If you're relying on the employer necessity exception to the convenience rule, get the documentation now — while the business reason is fresh and the arrangement is current. Don't wait until an audit notice arrives. The document should be in writing, signed, dated, and specific to your role and location.

Planning strategies for remote tech workers

1. Establish new domicile before your next RSU grant cycle

Grants received after genuine domicile change have no California component. If your company grants equity on a predictable schedule (annual in January, quarterly, at promotion), timing your move to precede a grant cycle reset resets your future equity tax exposure. Model the grant-by-grant California allocation for existing grants so you know exactly how many more years California continues to claim income from pre-move grants.

2. If your employer is in a convenience-rule state, get employer necessity in writing

The conversation with your manager and HR is uncomfortable, but the documentation is your protection. Frame it as compliance, not suspicion. "I want to make sure we're handling my state tax withholding correctly given that I'm now in [state]" is a reasonable professional request.

3. Count California workdays explicitly for pre-move grants

Don't estimate your California allocation with a rough fraction like "I was there 2 of 4 years." The actual calculation uses workdays, and the difference between a 46% and 52% California allocation can be material on a $500K vest. Get the exact number from your HR or expense system, or reconstruct it from calendar data. Use the RSU tax planning guide for the full mechanics of how CA-sourced RSU income is taxed and reported.

4. Model your actual post-move tax trajectory before the move

A California-to-Texas move with $600K in unvested RSUs and 2 years remaining on the 4-year vesting period still generates ~50% California-sourced income on those vests — roughly $300K of California-taxable income. At 13.3%, that's ~$40K in California taxes after the move. The move still makes financial sense, but it takes time for the California claim to expire. Know the payoff timeline before you move.

5. For Washington state remote workers: track capital gains separately

Washington's Capital Gains Income Tax applies to Washington residents, not to income sourced in Washington by nonresidents. If you live in Washington and realize long-term capital gains above the annual threshold, you owe the Washington CGIT. If you move out of Washington, new gains are no longer Washington-taxable. See the Washington equity tax guide for how the Washington CGIT interacts with RSU and option income specifically.

What a fee-only advisor can help you model

• Whether your specific remote arrangement triggers the convenience of employer rule — and how strong your employer-necessity documentation is
• Your exact California sourced income for each existing RSU and option grant, year by year, until the California claim expires
• The post-move tax trajectory: California nonresident filings, expected California income, and the year those obligations end
• Whether your New York physical presence (apartment, frequent office visits) creates statutory residency exposure
• How to time a domicile change relative to your RSU grant schedule to minimize future California-sourced income
• Capital gains optimization: sell, hold, or donate concentrated positions from a state tax perspective — strategies differ materially by state of residency