Tax Planning lawyers

Every conversation about tax planning starts with the line between arranging your affairs and lying about them. The foundational statement is Gregory v. Helvering, where the Court accepted that a taxpayer may structure transactions to reduce tax, but held that the form chosen must reflect a real business purpose and real substance. That case sets the outer wall against which all sophisticated tax planning is measured. A reorganization that existed only on paper, created for the sole purpose of moving shares into a shareholder's hands at capital gains rates, failed because nothing of business substance occurred. The lesson practitioners carry into every engagement is that labels do not control; what happened economically controls.

Congress codified the economic substance doctrine in IRC 7701(o). A transaction has economic substance only if it changes the taxpayer's economic position in a meaningful way apart from federal income tax effects, and the taxpayer has a substantial purpose apart from those tax effects. This is a conjunctive test. Both the objective prong, the meaningful change in economic position, and the subjective prong, the non-tax business purpose, must be satisfied when the doctrine is relevant. Good tax planning treats these two prongs as a checklist that must be documented contemporaneously, not reconstructed under audit. The statute did not invent the doctrine; it hardened the judicial version and attached a penalty that makes sloppy work expensive.

That penalty is the reason economic substance dominates high-end tax planning risk analysis. Under IRC 6662(b)(6), an underpayment attributable to a transaction lacking economic substance draws a twenty percent accuracy-related penalty, and that penalty rises to forty percent if the transaction was not adequately disclosed. The penalty is strict liability. There is no reasonable cause or good faith defense once a court finds the transaction lacked economic substance. This changes the calculus entirely. In ordinary tax planning a well-reasoned opinion letter can shield a client from penalties even if the position ultimately loses. Where 7701(o) applies, the opinion letter does not save the penalty. So the practitioner's job is to keep the transaction outside the doctrine's reach, or to build such genuine substance that the doctrine never bites.

The threshold question in litigation is whether the doctrine is even relevant to the transaction. Courts and the IRS do not apply 7701(o) to every choice. Congress said the determination of relevance is made as if the statute had never been enacted, which sends practitioners back to pre-codification law. Choosing to operate through an S corporation rather than a C corporation, deciding to make a charitable gift, or electing installment treatment on a genuine sale are the kinds of choices that the doctrine historically left alone because Congress plainly intended to offer them. Sound tax planning distinguishes between a statutory election Congress meant taxpayers to make freely and an engineered transaction whose only reason to exist is the deduction. The first category is defended on relevance; the second must survive the two-prong test.

The step-transaction doctrine works alongside economic substance and is litigated on three tests. The end-result test collapses separate steps that were always intended to reach a single result. The interdependence test collapses steps that would have been fruitless without completion of the whole series. The binding-commitment test, the narrowest, applies when at the time of the first step there was a binding commitment to take the later steps. A practitioner doing careful tax planning maps every step before the first one is taken and asks whether an examiner could recast the series as one integrated move. Spacing transactions in time helps but is not decisive; intent and interdependence matter more than the calendar.

The related doctrines round out the toolkit an examiner uses. Substance over form lets the government tax what actually happened rather than what the paperwork says. The sham transaction doctrine disregards transactions with no economic reality. Assignment of income, from Lucas v. Earl, prevents a taxpayer from shifting income to another party by contract while retaining control of the earning activity. These are not exotic. They appear constantly when tax planning tries to move income to lower-bracket family members, to entities in no-tax states, or into future years. The defense is always the same in structure: show real transfers of real control over real property or a real business, supported by real documents signed at the real time.

For the litigator, the frameworks converge on evidence of purpose and change. Contemporaneous board minutes, financial projections that model the deal without the tax benefit, third-party appraisals, and correspondence discussing genuine business goals are the building blocks. When tax planning produces a transaction that pencils out to a profit only after the tax savings, the objective prong is in danger, because courts compare pre-tax profit potential to the tax benefit claimed. A thin pre-tax profit against a large deduction invites the argument that the deal was a tax product. The defensive posture built during planning, not during audit, decides most of these cases.

One practical framing helps clients understand the stakes. Tax planning that reduces tax as a byproduct of a genuine business or investment decision is durable. Tax planning that manufactures a business decision to justify a predetermined tax result is fragile. The difference is not the size of the savings but the direction of causation. If the client would do the transaction anyway on its economics, the tax benefit is a feature. If the client would never do it but for the deduction, the transaction is a target. Every element discussed below, entity choice, timing, compensation, and estate coordination, lives inside these walls, and the smart move is to choose structures that Congress offered on their face rather than structures that must survive a substance attack. Those structural choices begin with the most basic decision a business makes, which is what form of entity to be, and that decision now varies sharply by state.

Federal tax planning sets the baseline, but state variation reshapes almost every recommendation. The first large split is between states with an entity-level tax on passthroughs and those without. After the federal ten thousand dollar cap on the state and local tax deduction, more than thirty states enacted pass-through entity taxes, commonly called PTE taxes, that let partnerships and S corporations pay state income tax at the entity level and deduct it federally, restoring a benefit the cap took from individual owners. The IRS blessed this approach in Notice 2020-75. For tax planning purposes the split is stark. A client operating in a PTE state can convert a nondeductible individual SALT payment into a deductible entity expense, while a client in a state without the election cannot. California, New York, New Jersey, and Illinois all offer versions, and each differs in election mechanics, timing of payments, and how the owner claims a credit against personal liability.

The mechanics of these PTE regimes create traps that good tax planning has to anticipate. Some states require the election annually by a fixed date, sometimes before the year even begins, so a late-forming entity loses the benefit for its first year. Some require estimated payments during the tax year to lock in the deduction, because the federal deduction follows the entity's payment under the cash or accrual method it uses. New York's PTET requires an annual election by a deadline in the tax year and separate estimated payments, while California conditioned its early elective tax on a prepayment by June of the tax year. A practitioner doing multistate tax planning has to track each state's calendar separately, because missing one date can cost a client the entire benefit for that jurisdiction.

The second split concerns how states treat the entity choice itself. Most states conform to the federal classification, so an entity taxed as an S corporation federally is an S corporation for state purposes. But some states diverge. New Hampshire imposes its Business Profits Tax and Business Enterprise Tax without regard to passthrough status, taxing the entity directly, which changes the passthrough-versus-C-corp analysis inside that state. Tennessee historically taxed certain passthroughs under its franchise and excise regime rather than honoring federal flow-through. California imposes a 1.5 percent entity-level tax on S corporations and a gross-receipts LLC fee that can make the LLC form expensive at scale. Effective tax planning weighs these entity-level state costs against the federal advantages of each form, because a structure that is optimal federally can be punitive in a particular state.

The third split is residency and sourcing, which drives where income is taxed at all. States apply different tests for individual residency and for sourcing business income, and aggressive states audit departures hard. New York's statutory residency rule can tax a person who maintains a permanent place of abode in the state and spends more than 183 days there, even if domiciled elsewhere, a rule litigated in cases like the well-known Barker line of administrative decisions. California pursues former residents on deferred compensation and equity earned while resident. Tax planning around a move from a high-tax state to a no-tax state like Florida or Texas has to address domicile evidence, day counts, and the treatment of income accrued before the move. The convenience-of-the-employer rule in New York further sources a remote worker's wages to New York if the arrangement is for the employee's convenience, which surprised many during the shift to remote work.

The fourth split is estate and inheritance taxation, which the later estate coordination section builds on. The federal exclusion is generous, but roughly a dozen states impose their own estate tax with far lower thresholds, and a few impose inheritance taxes on beneficiaries. Oregon and Massachusetts historically taxed estates above one million dollars, a small fraction of the federal exclusion, so a client who owes nothing federally can owe substantial state estate tax. Washington imposes a high top state estate rate. Tax planning that ignores the state layer produces plans that pass federal muster and still generate a large state bill at death. Some clients change domicile specifically to escape a state estate tax, which reopens the residency questions above.

Choice of forum matters when a dispute arises. A taxpayer who pays the tax and sues for refund can choose federal district court or the Court of Federal Claims, while a taxpayer who wants to litigate without prepaying goes to the United States Tax Court. The circuits are not uniform on important questions, and the Tax Court follows the Golsen rule, applying the law of the circuit to which the case would be appealed. So identical tax planning can carry different litigation risk depending on where the taxpayer resides. A position strong in one circuit may be weak in another, and counsel factors the venue into the risk opinion.

State conformity to the federal code adds another moving part. States are either rolling conformity, updating automatically as federal law changes, or static conformity, adopting the code as of a fixed date. When Congress passed the changes in P.L. 119-21, rolling-conformity states absorbed many provisions immediately, while static-conformity states kept old rules until their legislatures acted. Tax planning during a year of federal change requires checking each relevant state's conformity date, because a deduction available federally may not exist at the state level yet, or a federal repeal may not have reached the state return. Bonus depreciation and the treatment of the QBI deduction are frequent points of nonconformity, since many states decouple from the federal passthrough deduction entirely.

These jurisdictional splits mean that no plan is complete until counsel has run it through both the federal doctrines and the specific states in play. With the substantive framework and the state variation in view, the next question is procedural: how a planning engagement actually runs from first meeting through filing, and what happens if the IRS or a state challenges the result.

A tax planning engagement begins with facts, not answers. The first meeting gathers the client's entity structure, ownership percentages, prior returns, state footprint, near-term liquidity events, and personal goals such as succession or philanthropy. Competent tax planning resists the urge to recommend a structure before the numbers are modeled. The practitioner builds a baseline projection of income and tax under the status quo, then models alternatives, because a recommendation only means something against a quantified counterfactual. This early modeling also generates the pre-tax profit analysis that defends against an economic substance challenge later, so the same spreadsheet that sells the plan also protects it.

The engagement letter frames scope, and it matters more than clients expect. It defines whether counsel is opining, planning, or merely implementing, and it sets who bears responsibility for the numbers underlying the advice. Tax planning opinions come in tiers. A will-level or should-level opinion carries penalty protection under IRC 6664 reasonable cause for positions not governed by the strict-liability economic substance penalty. A more-likely-than-not opinion supports reporting a position but signals real risk. The letter should state the standard, the facts assumed, and the authorities relied on, because if the facts assumed turn out to be wrong, the opinion protects no one. Careful tax planning documents the factual assumptions in writing and asks the client to confirm them.

Implementation follows a calendar driven by recognition events. Many tax planning moves must occur before a triggering event, not after. An 83(b) election must be filed within thirty days of a restricted equity grant, and there is no relief for a late election, so the clock starts at grant and counsel calendars it immediately. A 1031 like-kind exchange, now limited to real property, requires identification of replacement property within forty-five days and closing within one hundred eighty days, with a qualified intermediary holding the proceeds so the taxpayer never has constructive receipt. Installment sale treatment attaches by default to eligible sales but can be elected out on the return. Entity elections, the S election on Form 2553 and the check-the-box election on Form 8832, have their own deadlines and retroactivity limits. Tax planning that misses a deadline usually cannot be fixed, which is why the implementation phase is really a project-management exercise.

Reportable transaction rules sit on top of ordinary filing. If a transaction falls within a listed transaction, a transaction of interest, a confidential transaction, a contractual protection transaction, or a loss transaction under the 6707A framework and the regulations, the taxpayer must disclose on Form 8886, and material advisors must disclose on Form 8918 and maintain investor lists. The penalties for nondisclosure are severe and, for listed transactions, are keyed to the tax benefit claimed. Responsible tax planning screens every structure against these categories before implementation. A plan that would require a reportable transaction disclosure is not necessarily improper, but it signals that the IRS considers the pattern abuse-prone, and counsel should be confident the substance is real before proceeding. Where the plan is a marketed product with a predetermined result, that is exactly the fact pattern the economic substance penalty was written to punish.

Once returns are filed, the evidence battlegrounds take shape if an examination opens. The IRS selects returns through scoring and through the disclosures just described, and an examination begins with an information document request. The central fights are almost always about purpose and substance. The government wants contemporaneous evidence that a business reason drove the transaction; the taxpayer wants to show board minutes, projections, appraisals, and correspondence created before the deal, not memos written after the audit letter arrived. Valuation is its own battleground in estate and gift tax planning, where the government challenges discounts for lack of control and lack of marketability, and the fight becomes a contest of appraisers. Good tax planning commissions a qualified appraisal at the time of the transaction precisely to win that later fight.

Compensation and deferral positions generate their own disputes. A 409A violation on deferred compensation accelerates income and adds a twenty percent additional tax, so examiners look for arrangements that permit impermissible acceleration or fail the timing rules. Reasonable compensation is litigated in both directions: the IRS argues an S corporation paid too little salary to avoid payroll tax, or that a C corporation paid an owner too much to disguise a dividend as a deductible salary. Tax planning around owner pay documents the market rate and the basis for it, because the record made at the time controls the argument. Wash sale challenges to loss harvesting turn on whether substantially identical securities were repurchased within the thirty day window on either side of the sale, and the answer depends on trade confirmations the client must keep.

Resolution paths run from agreement to litigation. Most examinations end at the agent level with a no-change, an agreed adjustment, or a partial concession. A taxpayer who disagrees receives a thirty-day letter and can appeal to the IRS Independent Office of Appeals, whose mandate is to settle based on the hazards of litigation, meaning Appeals weighs the odds each side would win in court. Skilled tax planning positions the file so Appeals sees genuine litigation risk for the government, which drives settlement. If Appeals fails, the taxpayer receives a statutory notice of deficiency, the ninety-day letter, and may petition the Tax Court without paying, or pay and sue for refund in district court or the Court of Federal Claims. The choice of forum, discussed earlier, feeds back into the original risk opinion, because counsel who planned the structure should have known which circuit's law would govern.

Throughout, the penalty exposure shapes strategy. Where the economic substance doctrine applies, the strict-liability penalty under IRC 6662(b)(6) means settlement leverage is limited, because no reasonable cause defense exists on that penalty, so the taxpayer either wins on substance or pays. Where ordinary accuracy penalties apply, a solid opinion and adequate disclosure can eliminate the penalty even on a losing position, which changes the settlement math entirely. This asymmetry is why tax planning done well keeps clients out of the strict-liability zone and inside the world of defensible, disclosed, business-driven structures. With the process understood, the substantive levers, entity choice, timing, compensation, charitable and estate structures, and the numbers behind them, come next.

The substantive levers all reduce to numbers, so tax planning begins with a clear view of the rates, thresholds, and dollar figures that drive every structural choice. The corporate rate under the TCJA architecture sits at 21 percent, a flat figure that applies whether the C corporation earns one dollar or one billion. That flat rate is the anchor for the entity comparison, because a passthrough owner instead pays at individual graduated rates that top out well above 21 percent before the qualified business income deduction under IRC 199A enters the calculation. Good tax planning never compares the raw 21 percent to the top individual rate and stops there, because the C corporation number is only the first layer.

The second layer is the shareholder tax on distributed earnings. Money that leaves a C corporation as a dividend is taxed again at the qualified dividend rate, generally 20 percent plus the 3.8 percent net investment income tax for high earners. Stack the 21 percent entity tax on the roughly 23.8 percent shareholder tax and the combined burden on distributed corporate profit approaches 39.8 percent, which is close to but not identical to the passthrough result. This is why tax planning treats the C corporation as attractive mainly when earnings stay inside the entity and compound, and less attractive when the owner needs the cash every year. The double layer only bites on distribution, so a business that reinvests can defer the second tax for years.

The 199A deduction changes the passthrough side of the ledger. It allows a deduction of up to 20 percent of qualified business income, which lowers the effective top rate on eligible passthrough income from 37 percent toward roughly 29.6 percent. The deduction phases in wage and property limits above income thresholds, and it denies the benefit to specified service trades or businesses such as law, health, and consulting once the owner's income climbs past the threshold. Tax planning for a professional practice therefore looks very different from tax planning for a manufacturer, because the manufacturer keeps the deduction at high income by paying W-2 wages and holding depreciable property, while the lawyer loses it. P.L. 119-21 extended and adjusted this deduction regime, so the qualitative point holds: the deduction is real, it is limited, and its availability turns on wages, property, and the nature of the trade.

The estate numbers moved in 2026. The IRS 2026 inflation adjustments incorporating P.L. 119-21 set the estate basic exclusion amount at 15,000,000 dollars for 2026 decedents, up from 13,990,000 dollars. That figure is per person, so a married couple with proper portability or credit shelter planning can shield 30,000,000 dollars. Tax planning around this exclusion is now less about the feared cliff and more about using the higher permanent number well, because the prior sunset anxiety has eased. Still, the 40 percent top estate rate applies above the exclusion, and that rate is what makes lifetime gifting, valuation discounts, and trust structures worth the trouble for large estates.

Valuation is where many of these numbers become contestable. The estate and gift tax turns on fair market value, and the difference between a defensible appraisal and an aggressive one can be millions of dollars of tax. Tax planning that relies on minority and marketability discounts for closely held interests must document the discount with a qualified appraisal, because the IRS challenges thin support and the 26 USC 6662(g) valuation misstatement penalties escalate as the understatement grows. A gift reported at a value 65 percent or less of the correct value triggers a 20 percent penalty, and 40 percent or less triggers 40 percent. Numbers drive the penalty tier, so the appraisal is not a formality.

Timing numbers matter for capital transactions. The installment method under IRC 453 spreads gain across the years payments are received, which can keep a seller below the net investment income tax threshold or in a lower bracket year to year. A 1031 like-kind exchange, now limited to real property after the TCJA, defers the entire gain if the exchange rules are met, which means zero current tax on an appreciated building rolled into replacement property. The approach models these deferrals in present-value terms, because a dollar of tax paid in 2035 is cheaper than a dollar paid in 2026, and the discount rate the client applies determines how much the deferral is actually worth.

Loss numbers round out the picture. Capital losses offset capital gains dollar for dollar and up to 3,000 dollars of ordinary income per year, with the excess carried forward indefinitely. The wash sale rule under IRC 1091 disallows a loss if substantially identical securities are repurchased within 30 days before or after the sale, so harvesting must respect that window. The structuring that harvests losses in December to offset gains recognized earlier in the year can save the client the full 23.8 percent on the offset amount, which on a 500,000 dollar gain is nearly 120,000 dollars kept.

The SALT workaround numbers are concrete too. The passthrough entity tax elections that most states now offer let the entity pay and deduct state tax at the business level, bypassing the individual SALT deduction cap. For a partner in a high tax state, that can restore a deduction worth tens of thousands of dollars per year at the 37 percent federal rate. Charitable numbers matter as well: a donor advised fund gift of appreciated stock yields a deduction at fair market value up to 30 percent of adjusted gross income and avoids the capital gains tax on the appreciation, while a charitable remainder trust converts an appreciated asset into a lifetime income stream with a partial current deduction. Every one of these levers is a number, and disciplined the approach is the practice of comparing those numbers against the client's actual facts, cash needs, and risk tolerance rather than chasing the headline rate.

The lawyer you hire for tax planning should be the one who first tells you where the outer walls are, because the entire enterprise is bounded by the doctrine covered at the start of this guide. Section one framed economic substance and the step-transaction rule as the limits inside which every structure has to live, and the codification of that doctrine in IRC 7701(o) with strict-liability penalties under 6662(b)(6) means the lawyer's first job is to keep you inside those walls. A tax planning attorney who leads with the aggressive result and only later mentions substance has the analysis backward. The right counsel starts with the business purpose and builds the tax result on top of it, because Gregory v. Helvering settled long ago that a taxpayer may arrange affairs to minimize tax, but that substance, not form, governs what the arrangement actually is.

Look first for genuine subject matter fit. Tax planning is not one field. The lawyer who excels at 199A optimization for operating businesses may not be the right person for a charitable remainder trust or a cross-border deferral question. Ask the candidate to describe the last three matters they handled that resemble yours, and listen for whether they discuss the doctrine, the penalty exposure, and the documentation, or whether they only describe the savings. A seasoned tax planning lawyer talks about how a structure survives audit, not just how it looks on the return.

Ask directly about opinion practice. Because the accuracy penalties under the ordinary rules can be defeated by a well-reasoned opinion and adequate disclosure, but the strict-liability penalty on economic substance cannot, the lawyer's willingness to write a should-level or more-likely-than-not opinion tells you a great deal. The structuring counsel who will stand behind an opinion in writing has skin in the game. One who offers only oral comfort on a large transaction is signaling doubt. You want the person who explains exactly which penalty regime your transaction lives under and why.

Probe their reportable transaction awareness. The listed transaction and reportable transaction rules under IRC 6011 and the related regulations carry their own disclosure duties and penalties under IRC 6707A, and a lawyer steeped in real the approach knows the current list cold. If a proposed structure resembles anything the IRS has flagged, you need to hear that before you sign, not after a notice arrives. Counsel who has never mentioned reportable transactions in a discussion of aggressive shelters has not been paying attention.

Where a firm has earned verification, dated, editor-reviewed checks stand behind it, so you can confirm bar standing, practice focus, and disciplinary history before the first call. Use that to narrow the field to lawyers who actually concentrate in the structuring rather than those who list it among ten unrelated areas. The verification checks in this directory are dated so you can see how recent the confirmation is, which matters because bar status and firm composition change. The approach is a long-horizon engagement, so knowing the credential was confirmed recently is worth the minute it takes to look.

Fee structure deserves scrutiny. The structuring built on a contingent fee tied to the size of the deduction creates an incentive misalignment, because the lawyer profits from aggression that you bear the risk of. Flat or hourly fees for the planning work keep the lawyer's judgment clean. Ask how the firm bills, whether opinion work is separately priced, and whether they carry malpractice coverage sized to the transactions they handle. A lawyer who structures a nine-figure estate plan should carry coverage that reflects that exposure.

Coordinate the team early. Sound the approach usually requires the lawyer, the CPA, and often an appraiser to work from the same set of facts, because valuation and reporting positions have to match the legal structure. The best the structuring counsel convenes that team rather than working in isolation, and they document who relied on whom, which protects the reasonable cause defense if the accuracy penalties ever come into play. Ask the candidate how they typically coordinate with your existing accountant.

Finally, return to the theme this guide opened with. The doctrine is the outer wall, and the entire point of hiring skilled counsel is to build ambitious but durable structures inside it. The approach that ignores economic substance is not planning at all, it is a bet that the return will not be examined. The lawyer worth hiring treats Gregory v. Helvering and IRC 7701(o) as the ground rules and then finds every legitimate advantage the code allows within them. When you interview counsel, judge them by how comfortably they move between the aggressive idea and the doctrinal limit, because that fluency is what separates real the structuring from wishful thinking. The right lawyer will make you feel the walls, then show you how much room there is inside them.