State Income Tax Guide for Remote Freelancers

My state income tax guide for remote freelancers used to begin with a vague warning that every state is different. True, useless. I understand the problem better through three files I would actually put on my desk: a Texas designer with a California client, a New York freelancer who moved to Florida, and a Florida resident who worked from Chicago for three months.

First file: I live and work from Austin, and a California company pays me $18,760 to redesign the checkout flow its California team uses. Texas has no individual income tax, but that does not automatically make the project invisible to California. California's sourcing rules for an independent contractor can look at where the customer receives the benefit of my service. My physical location is not the only fact.

Does that mean every California client creates California tax for every Texas designer? I would not make that jump. I ask what I delivered, who used it, where the benefit was received, and whether my business operated both inside and outside California. Then I check the filing and apportionment instructions from the California Franchise Tax Board. The client's mailing address alone is a lousy conclusion.

I save the contract, statement of work, invoices, and a note identifying the team that used the deliverable. “Website work” tells me almost nothing six months later. “Checkout research and UI delivered to Los Angeles retail operations” gives me something a preparer can evaluate.

Second file: I left Brooklyn on July 12 and moved to St. Petersburg, Florida. Through July 12, I earned $43,286 while a New York resident. After the move, I collected another $37,914 from clients around the country, including one in Manhattan. New York generally wants a part-year resident return covering income from my resident period plus any New York-source income after I became a nonresident.

Florida does not impose an individual income tax, but that fact does not erase the New York half of my year.

The word “moved” carries more weight than forwarding mail. I keep the terminated lease, Florida lease, mover receipt, driver's-license change, voter registration, utility start dates, and the day my home office became usable. I also separate invoices and expenses around the move date. If New York thinks Brooklyn remained my domicile, a beach photo and a Florida address on one invoice will not do much for me.

I run the split through the tax calculator for planning, then verify the part-year and nonresident forms with the New York Department of Taxation and Finance. The permanent move date and the source of post-move work are separate questions. Which, of course, is why one clean annual profit number stops being clean.

Third file: I remain domiciled in Florida but rent a Chicago apartment from May 4 through August 2 and do $24,618 of client work from the kitchen table. I am not claiming Illinois residency merely because I stayed 90 days. I am also not assuming Florida residency shields business income earned while I was operating in Illinois. Illinois tells nonresidents with business income inside and outside the state to use its business-income apportionment worksheet, so I keep the actual work dates and receipts rather than guessing a quarter of annual profit.

This is the travel-calendar detail I used to treat as trivia. I now mark working days, vacation days, client location, where I physically performed the work, and when each payment arrived. Illinois uses its own sourcing and apportionment rules; another state may use a different test. Three months can be enough to create a filing question without changing my domicile.

For that Chicago period I start with the Illinois Department of Revenue. When a project points elsewhere, I go to the actual agency: the Pennsylvania Department of Revenue, Ohio Department of Taxation, Georgia Department of Revenue, North Carolina Department of Revenue, or Michigan Treasury tax guidance. I do not borrow California's benefit rule and paste it onto Ohio.

Federal and state estimated payments stay separate in my books. If one of these scenarios creates state tax, the federal confirmation number does not pay it, and the deadlines or thresholds may differ. I label each payment with state, year, and period because “tax payment 2” has betrayed me before.

The useful answer is not “pay where the client is” or “pay where I live.” I track residency, domicile, work location, customer benefit, and payment timing, then apply the particular state's rule to those facts. I use the frequently asked questions for the federal baseline and bring the three little files to a multistate preparer when the income is material.