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Tax Filing for High-Income Earners

Complex Income Deserves More Than Data Entry

Equity compensation, K-1s, rental schedules, income in three states — high-income returns fail quietly, then surface as IRS notices. Taxstra is a CPA-led firm filing for roughly 1,500 clients in all 50 states. We file returns that reconcile cleanly, hold up to scrutiny, and feed next year's strategy.

A guide by Taxstra Tax & Accounting — CPA-led tax strategy for business owners

Why High-Income Returns Go Wrong

The errors are quiet, automated, and expensive

Here's the direct answer: most high-income returns don't fail in an audit. They fail in a computer. The IRS matches every W-2, 1099, and K-1 it receives against what your return reports, and any mismatch generates an automated notice — no human required.

Once your income includes equity compensation, pass-through entities, rentals, or multiple states, the number of places a return can silently break multiplies. A generalist preparer working through a 400-return season doesn't have time to reconcile your brokerage basis or rebuild a missing K-1 basis schedule. So the error ships, and you find out eighteen months later.

Income situationCommon filing errorWhat it costs you
Equity compensation (RSUs, ISOs, ESPP)Broker-reported basis not adjusted for income already taxed at vestingThe same income gets taxed twice
Multiple K-1sNo basis or at-risk tracking from year to yearLosses disallowed, distributions taxed unexpectedly
Rental real estateDepreciation errors and mistracked passive lossesLost deductions now, painful recapture surprises later
Multi-state incomeWrong state sourcing, missed credits for taxes paidDouble taxation of the same dollars
S-Corp ownershipBooks that do not tie to the return, undocumented reasonable compNotice exposure and a weak audit position
Watch Out
The most common error we find in new-client returns: RSU income is taxed as wages at vesting, but brokers often report a cost basis of zero (or the unadjusted basis) on Form 1099-B when shares are sold. If the preparer doesn't adjust the basis, the vesting income gets taxed a second time as capital gain. On a six-figure vesting event, that's a five-figure overpayment — and the IRS will not call to give it back.
Key Insight

Your tax return is a system of record, not a formality.

Every basis schedule, carryforward, and election on this year's return determines what's possible on the next five. Filing done sloppily doesn't just risk notices — it destroys the paper trail your future strategies depend on.

What Our Tax Filing Service Includes

Everything required to file complex income correctly — not a checkbox upsell list

Our filing engagement is built around one standard: every number on the return should be supportable years later without a scavenger hunt. Here's what that includes:

  • Individual and business return preparation — Form 1040 plus 1120-S, 1065, or 1120 as your structure requires, prepared by the same team so they reconcile.
  • K-1 reconciliation and basis tracking — basis, at-risk, and suspended loss schedules maintained year over year, not reconstructed in a panic.
  • Equity compensation reporting — basis adjustments on RSU and ESPP sales, ISO exercise tracking, and withholding review against your actual bracket.
  • All required state filings — resident, nonresident, and part-year returns with sourcing and credits handled deliberately.
  • Elections review — depreciation methods, safe harbors, grouping elections, and state pass-through entity tax coordination, applied consistently.
  • Extension and payment strategy — when extending makes sense, we estimate the liability and recommend a payment so penalties stay minimal.
  • Secure portal and digital workpapers — a tailored document request list, bank-level encryption, and workpapers retained to defend every figure.

Every return is prepared by a trained tax accountant and reviewed by a senior accountant against a structured checklist. Two sets of eyes is the policy, not the exception.

Built for Complex Income

The four income profiles this service was designed around

Tech employees and executives with equity compensation. RSUs, ISOs, NSOs, and ESPP shares each carry their own reporting rules, and the withholding your employer applies rarely matches your actual bracket. If you want the strategy side of this — not just clean filing — our high-income tax planning guide covers the levers in depth.

Here's a worked example of why withholding review matters at filing time:

Key Insight

The $26,000 April surprise, illustrated.

An engineer has $200,000 of RSUs vest during the year. Her employer withholds federal tax at the flat 22% supplemental rate — $44,000. But her actual marginal rate on that income is 35%, meaning roughly $70,000 of federal tax is actually due on the vesting. That's a $26,000 gap that surfaces at filing, often with underpayment penalties on top. We catch this during the year when we can, and at minimum we make sure filing season isn't the first time anyone does the math.

Physicians — especially locum tenens and 1099. Mixed W-2/1099 income, work in four states, and quarterly estimates nobody set up correctly. This is our flagship vertical; see our physician tax services for the full picture.

Real estate investors. Depreciation schedules, passive activity loss tracking, short-term rental activity, cost segregation reporting, and K-1s from syndications. Most preparers get the depreciation wrong or lose the suspended losses. Our real estate tax services exist because of how often we have to fix this.

Business owners with S-Corps and partnerships. Books-to-return alignment, reasonable compensation documentation, accountable plans, and state apportionment — filed so the entity return and your 1040 tell the same story.

Multi-State Filing Without Double Tax

Where high earners overpay without ever knowing it

Work in two or more states and your filing question changes from "what do I owe" to "which state gets which dollars." Get the sourcing wrong and two states tax the same income; miss a credit for taxes paid to another state and you've donated money no one will ever refund voluntarily.

We handle nonresident and part-year returns, reciprocity agreements, credits for taxes paid, and the state-by-state sourcing rules that determine where wages, business income, and equity compensation are actually taxable. For locum physicians and remote employees, this is routinely the largest error in prior-year returns we review. Full detail on our multi-state filing service.

Taxstra CPA Tip

Tell us about a move before it happens.

Residency changes are scored on facts — where you live, work, vote, and keep your life. A 30-minute conversation before you relocate or take an out-of-state contract lets us document the change correctly from day one. Reconstructing it two years later, during an audit, is a much worse meeting.

How Filing Connects to Planning

A clean return is the foundation — not the finish line

Filing is backward-looking by definition. It reports decisions that have already been made. The real money is in the decisions still ahead of you — entity structure, retirement plan design, equity timing, real estate strategy — and a correctly filed return is the dataset every one of those decisions is built on.

That's why most of our filing clients pair compliance with a tax planning engagement: the same team that files your return models what next year's return should look like, then helps you execute the changes while the calendar is still open. Filing tells you the score. Planning changes it.

We review every new client's prior two to three years of returns as part of onboarding. When we find errors or missed elections worth amending, we tell you — with the dollar impact — before we file anything new.

Why Taxstra

What you're actually hiring when you hire this firm

  • CPA + MBA + licensed real estate broker. Founder Bryan Martin's credential stack means rental, STR, and cost segregation returns are filed by someone who understands the underlying transactions, not just the forms.
  • Genuine multi-state expertise. Locum tenens sourcing, NY/NJ nonresident filings, and state credit coordination are daily work here, not annual novelties.
  • A planning firm that files, not a filing mill that upsells. Compliance is engineered to support strategy — elections, basis, and documentation are maintained with next year in mind.
  • Established and nationwide. Roughly 1,500 clients across all 50 states — a real firm with review processes, not a solo side practice.
  • Trusted in the physician community. White Coat Investor platinum sponsor and podcast guest (Episode #459).
  • Tech-forward. Secure client portal, digital workpapers, modern tooling, fast turnaround.

FAQs

What high-income filers ask us most

Fees depend on complexity — number of states, K-1s, rental schedules, and business returns involved. We quote a flat fee after a short discovery call, before any work begins, so there are no hourly surprises. A return with equity compensation, several K-1s, and two states costs more than a single-state W-2 return, and we tell you exactly what yours will run up front.

File It Clean. File It Once.

Book a free 30-minute call. We'll look at your prior returns, flag what's broken, and quote a flat fee before any work begins.

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Find Out What You're Overpaying in Taxes

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