I Built a Free Remote-Work Tax Calculator Because Nobody Was Answering the Real Question

 

Free Remote-Work Tax Calculator

I Built a Free Remote-Work Tax Calculator Because Nobody Was Answering the Real Question

A few weeks ago I kept running into the same pattern while researching content for this blog: someone accepts a fully remote job, decides to move from a state like California or New York to somewhere cheaper like Texas or Florida, and then gets blindsided twice once by their employer's geographic pay adjustment, and again by their new state tax bill (or lack of one). Nobody was showing them the combined number. Just the tax piece, or just the pay-band piece, never both stacked together the way it actually lands on a paycheck.

As someone who spends most of his working hours inside tax and audit files, I'm a CA finalist doing my articleship, and I've worked tax audit engagements before that this bugged me more than it probably should have. So, I did what I usually do when a gap like this shows up: I built a tool instead of just writing about the problem.

The tool: Remote Work Out-of-State Tax & Salary Calculator

Try it here →

It's a free, 100% browser-based calculator. Nothing is sent to a server, nothing is stored, no email wall. You put in your current salary, your current state, and the state you're moving to, and it shows you three things stacked together instead of in isolation:

  1. The state tax shift what actually changes when your tax residency moves
  2. The geographic pay-band adjustment the salary cut a lot of employers apply automatically when you relocate to a lower cost-of-living area
  3. The federal bracket ripple effect because a lower gross salary from a geo-pay cut can quietly drop you into a lower federal bracket too, which softens (or worsens) the final number in ways people don't expect

The output is a single line: your true net monthly take-home pay difference, after state tax, federal tax, FICA, and the pay adjustment all get netted against each other.

Why the three-part framing matters

Most of the remote-work relocation content I found while researching this only ever tackled one variable. A tax-focused article would explain state residency rules. A career-advice piece would mention companies sometimes cut pay for lower cost-of-living markets. Almost nothing put both next to a federal bracket calculation and showed the actual number someone would see hit their bank account.

That gap is exactly the kind of thing I like using AI-assisted workflows to close not writing about a problem in the abstract, but shipping something that gives a direct answer. If you've followed how I approach AI agents for small firms, this is the same instinct applied to a public-facing tool instead of an internal workflow.

A few things I deliberately built in

  • State tax is modeled progressively, not as a flat top rate. A lot of quick calculators just multiply your salary by a state's top marginal bracket, which badly overstates the bill for anyone not earning close to six figures. I scaled a synthetic progressive curve to each state's top rate instead, so the number tracks real effective rates much more closely.
  • FICA respects the Social Security wage cap. Above the annual wage base, only the uncapped 1.45% Medicare portion keeps applying a detail that's easy to miss if you're modeling this by hand.
  • Federal tax uses real marginal bracket math, not a flat estimate, so the ripple effect from a geo-pay cut shows up accurately.

It's still an estimate every state has its own bracket structure, filing-status rules, and local/city taxes that a general tool like this can't fully replicate. I say that plainly on the page itself. But it's a genuinely useful first pass before you have the real conversation with a CPA or your HR team, which is exactly the gap it's meant to fill.

If you're dealing with the multi-state tax side of this professionally

If you're on the accounting or advisory side rather than the "I'm personally relocating" side, a couple of related pieces on this blog might be useful alongside the calculator:

Try it and tell me what's missing

The calculator is free, ad-free, and stays entirely in your browser. If you're planning a move, negotiating a relocation with HR, or you're an advisor who keeps fielding this question from clients give it a try and let me know if there's a variable you wish it accounted for. I built it to actually be used, not just to sit on a page, so real feedback shapes what I add next.

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