Your First 1099 Paycheck Looks Bigger Than It Is
A locum tenens physician takes their first assignment after years of W-2 employment. The day rate looks fantastic — no more watching a hospital system skim overhead off every RVU. Then the first quarterly estimated tax deadline arrives, and it turns out roughly a third of that "bigger" paycheck was never really theirs to spend. Nobody withheld it. Nobody warned them how many states would want a piece of it either.
This is the single most common financial surprise in locum tenens and travel healthcare work — physicians, nurse practitioners, PAs, and travel nurses moving from a system that handled taxes automatically to one where they're now the accounting department. It's not that the tax rules are exotic. It's that nobody explains them before the first assignment starts, and by the time the confusion surfaces, a full tax year of habits is already baked in.
Here's what actually matters: how you're classified, what "tax home" means and why it can quietly disappear, how multi-state income really gets taxed, and the bookkeeping habits that keep all of it from becoming a mess.
1099 Contractor, Not a Traveling Employee
The starting point that reshapes everything else: locum tenens and most travel-healthcare assignments are independent contractor work, not employment. The staffing agency that placed you isn't your employer for tax purposes — it's a client paying a contractor. That distinction sounds bureaucratic, but it flips your entire financial setup:
- No withholding. Nothing is taken out of your pay for federal income tax, state income tax, Social Security, or Medicare. The full amount hits your account, and all of it is still owed to someone.
- Self-employment tax applies. On top of ordinary income tax, net self-employment earnings are taxed at 15.3% up to the Social Security wage base, with the 2.9% Medicare portion continuing above it, uncapped. A W-2 employee splits this cost with an employer; a 1099 contractor pays both halves.
- You now have deductible business expenses. This is the upside: travel, licensing, malpractice tail coverage, continuing education, home-office costs, and more become legitimate deductions against your income — something a W-2 clinician mostly can't claim.
Some travel-healthcare staffing arrangements do use W-2 employment (this varies more by agency and specialty than people expect — check your contract, don't assume). If you're W-2, withholding happens automatically and much of what follows about quarterly payments doesn't apply to you directly. If you're 1099, the rest of this article is your operating manual.
Sole proprietor vs. S-corp: By default, 1099 income is sole proprietor income reported on Schedule C, with self-employment tax on the full net profit. Once earnings climb well into six figures, some clinicians elect S-corp status — paying themselves a "reasonable" W-2 salary and taking the remainder as a distribution not subject to self-employment tax. The savings are real, but so are the costs: payroll processing, a separate entity return, and stricter recordkeeping. Below roughly $150,000–$200,000 in net locum income, the compliance overhead often outweighs the tax savings. It's worth a real conversation with a CPA, not a rule of thumb applied blindly — and before forming an entity, confirm your staffing agency will actually contract with it. Some only issue 1099s to individuals.
Tax Home: The Concept That Decides What You Can Deduct
"Tax home" is the single most misunderstood term in travel-healthcare finances, and it determines whether your travel, lodging, and meal costs are deductible at all.
Your tax home isn't where you're from, where your driver's license is issued, or where your family lives. The IRS defines it as your regular or main place of business — and for someone taking sequential assignments in different cities, that definition gets slippery fast. If you don't maintain a genuine tax home, the IRS can treat every assignment location as your tax home in turn, which means none of your travel costs while working there are deductible — because you're not "away from home," you're just home.
To support a valid tax home, you generally need to satisfy at least two of three conditions:
- You perform some work in the area you claim as your tax home (even occasional local shifts or telehealth).
- You spend at least 30 days a year there (not necessarily consecutive).
- You're financially responsible for maintaining that home — rent, mortgage, utilities — even while you're away on assignment.
Clinicians who sell their home, stop paying rent anywhere, and live entirely out of short-term assignment housing risk being classified as an "itinerant" worker with no tax home — which sounds freeing but is a tax trap. It eliminates the travel-expense deduction entirely, on the theory that you can't be "traveling away from home" if you have no home to travel away from.
Practical fix: keep documentation that proves your tax home is real — a lease or mortgage statement, utility bills in your name, and a calendar showing local work or time spent there. This isn't paperwork for its own sake; it's the evidence that turns thousands of dollars of travel and lodging costs from a gray area into a defensible deduction.
Multi-State Filing: Why One W-2 Job Never Prepared You for This
A hospital employee who lives and works in one state files one state return. A locum tenens clinician who works assignments in four states in a year may need to file up to five: a resident return for their home state, plus a non-resident return in every state where they earned income above that state's filing threshold.
The mechanics, in short:
- You file where you earn, not just where you live. Each state where you worked an assignment generally wants a non-resident return on the income earned there, once it crosses that state's minimum threshold.
- Your home state gives you a credit, not an exemption. Most states offer a credit for taxes paid to other states, which prevents the same dollar from being taxed twice — but it doesn't eliminate the requirement to file everywhere you worked, and state tax rates vary enough that the credit rarely nets out to zero.
- Seven states have no income tax at all (Texas, Florida, Nevada, Washington, Wyoming, South Dakota, and Alaska as of 2026) — an assignment there means no state filing obligation for that income, though your home state may still tax it if that's not where you live.
The bookkeeping problem underneath all of this: a single 1099-NEC from your staffing agency almost never breaks down which portion of your annual pay was earned in which state. If you took assignments in three states, you need to reconstruct that split yourself — from contracts, timesheets, or pay stubs — because the state revenue departments will expect state-specific numbers your federal 1099 doesn't provide. Physicians who wait until tax season to piece this together routinely lose days to it. Physicians who log income by state, by assignment, as it happens don't.
The Deductions That Are Actually Yours Now
Moving from W-2 to 1099 status opens up a category of deductions most clinicians have never had to think about:
- Travel costs while away from your tax home — flights, mileage, rental cars, and lodging for assignment travel (not commuting within your tax-home area).
- Meals while traveling — generally 50% deductible, tracked either through actual receipts or the IRS per diem rate for the assignment's location.
- State medical licensing fees — every state license required for an assignment is a deductible business expense, and for a clinician juggling five or six state licenses, this adds up to real money.
- Malpractice insurance, including tail coverage and occurrence-based premiums not covered by the facility.
- Continuing education, professional dues, and required certifications.
- Health insurance premiums and HSA contributions — without an employer plan, these become self-employed deductions.
- A home office, if you genuinely use part of your home regularly for the administrative side of your practice (credentialing paperwork, scheduling, correspondence) — a legitimate but narrowly scoped deduction, not a blanket write-off for having a home.
The rule that governs all of it: deductions only hold up if they're substantiated. A bank statement showing "$340 - Hotel" isn't sufficient on its own — save itemized receipts, note the business purpose, and keep records for at least three years (many CPAs recommend seven, given how multi-state returns can extend audit windows).
Quarterly Estimated Taxes: The Deadline That Catches Everyone Once
Because nothing is withheld from 1099 pay, the IRS expects you to send in income and self-employment tax four times a year — roughly April 15, June 15, September 15, and January 15 — rather than in one lump sum the following April. Miss this, and the IRS charges an underpayment penalty even if you pay everything owed by the filing deadline.
A working rule of thumb: set aside 25–35% of every 1099 payment the day it arrives, into a separate account you don't touch. The exact figure depends on your total income, deductions, state tax rates, and entity structure, but this range keeps most clinicians from a nasty surprise. To avoid the penalty specifically, you generally need to pay in either 90% of the current year's tax liability or 100–110% of last year's (depending on income level) across the four payments.
This is where the gap between W-2 habits and 1099 reality does the most damage. A hospital employee never thinks about taxes between paychecks because the system handles it silently. A locum tenens contractor who keeps that same mental model — spend what hits the account, worry about taxes in April — is the person who owes a five-figure balance plus penalties they didn't see coming.
Building a System, Not a Shoebox of Receipts
The clinicians who handle this well share a common pattern: they treat their locum tenens work as a small business from day one, not as a series of well-paid shifts.
- Separate business and personal accounts. Route all 1099 income into a dedicated account, and pay business expenses from it. Mixing personal and business spending is the fastest way to lose deductions you're entitled to, because you can no longer prove what was for what.
- Track income by state and by assignment as you go. Don't wait for your 1099 to tell you the breakdown — it won't. Log gross pay, dates, and location per assignment in real time.
- Keep a contemporaneous mileage and travel log. The IRS wants records made close to the time of the expense, not reconstructed from memory in March.
- Reconcile your books monthly, not annually. A locum tenens clinician juggling multiple agencies, multiple states, and irregular pay schedules can lose track fast. Monthly reconciliation catches a missing 1099 or a misclassified expense while it's still fixable, instead of finding it during tax prep under deadline pressure.
This is exactly where plain-text accounting earns its keep for a mobile, multi-state, multi-payer income stream. A Beancount ledger lets you tag every transaction by state, by assignment, and by client agency, and query the results instantly — "how much did I earn in Texas this year," "what's my total mileage deduction," "am I on pace for my Q3 estimated payment" — without waiting for a bookkeeper or reconstructing anything from bank statements. Because the ledger is plain text and version-controlled, your entire financial history travels with you exactly like your career does, readable and auditable from any assignment, any state, any year.
Keep Your Books as Mobile as Your Career
Locum tenens and travel-healthcare work rewards clinicians who treat their finances with the same rigor as their clinical documentation — precise, timestamped, and easy to produce on demand. Beancount.io offers plain-text accounting that's transparent, fully under your control, and built to handle exactly this kind of multi-state, multi-assignment complexity without vendor lock-in. Get started for free and keep your books as portable as your next contract.