I'm Darrin Mish. For 32 years I've practiced federal tax litigation — routine audits, Tax Court cases, and everything in between. If you're facing an IRS issue, here's what you need to know first.
I'm Darrin Mish. Tampa tax attorney, 32 years in, more than $100 million in IRS debt resolved. That's my resolution practice. What follows is the other side of the desk – the planning moves that keep you from ever needing it.
You're running a better tax strategy than most if you're doing anything beyond what TurboTax prompts you to do. But that's a low bar. Most business owners confuse tax compliance with tax planning, showing up in March with a shoebox and hoping their preparer finds something clever. They don't.
Real tax planning happens in June. In September. In November when you still have time to move the needle. It happens when you structure your compensation, choose your entity, and time your income with the tax code in mind, not as an afterthought. The difference between reactive filing and proactive planning typically runs five to six figures annually for profitable businesses.
The Entity Structure Nobody Tells You About
Your entity choice determines your tax baseline before you earn dollar one. S corporations, C corporations, partnerships, sole proprietorships – each carries distinct tax consequences that compound over decades.
Most small business owners default to whatever their attorney suggested during formation or whatever seemed simplest at the time. That decision now costs you $20,000 annually in unnecessary payroll taxes, but nobody's revisited it since 2019.
S Corporation Sweet Spot
The S corp election delivers better tax treatment for service businesses grossing between $80,000 and $500,000. You split income between reasonable salary (subject to payroll tax) and distributions (not subject to self-employment tax). The IRS scrutinizes this split, but conservative ratios withstand challenge.
Here's what changes:
- Sole proprietor earning $200,000 pays $28,268 in self-employment tax
- S corp owner with $90,000 salary pays $13,770 in payroll tax
- Net savings: $14,498 annually with identical business economics
The administrative burden increases slightly. You run payroll, file an additional return, maintain corporate formalities. For five-figure annual savings, it's trivial compliance work.
When C Corporations Make Sense Again
The Tax Cuts and Jobs Act dropped C corporation rates to 21% flat in 2017. That changed the math for businesses retaining significant earnings. If you're reinvesting $150,000+ annually into equipment, inventory, or expansion rather than taking distributions, C corp treatment might deliver better tax results.
The tax planning strategies outlined by Schwab highlight entity selection as foundational, and they're right. You can't tax-loss harvest your way out of structural inefficiency.
Double taxation remains real. Corporate earnings face 21% federal tax, then individual tax on distributions. But if you're not distributing – if you're building a capital-intensive operation – single-level taxation at 21% beats individual rates that hit 37% at the top.
Retirement Contributions As Tax Strategy
Qualified retirement plans function as immediate deductions funding your future tax-free or tax-deferred. Every dollar contributed reduces current taxable income. The compounding happens in a tax-sheltered environment. For high-income business owners, this represents the most straightforward better tax planning available.
Solo 401(k) Contribution Limits
Business owners without employees can contribute both employee and employer portions to a solo 401(k). For 2026, that's $23,500 as employee deferrals plus 25% of compensation as employer contributions, up to $70,000 total ($77,500 if you're 50 or older).
This isn't retirement advice. This is tax reduction that happens to build retirement wealth simultaneously. A business owner with $200,000 in self-employment income can shelter $50,000 through solo 401(k) contributions, dropping taxable income to $150,000 before accounting for the QBI deduction.
| Income Level | Maximum Contribution | Tax Savings at 35% Rate |
|---|---|---|
| $100,000 | $25,000 | $8,750 |
| $200,000 | $50,000 | $17,500 |
| $300,000+ | $70,000 | $24,500 |
The mechanics matter. Employee deferrals must come from W-2 wages for S corporations. Employer contributions come from net business income. Understanding the interplay prevents contribution errors that trigger penalties.
Backdoor Roth Mechanics
High earners face income limits on direct Roth IRA contributions. The mega backdoor Roth strategy solves this through after-tax 401(k) contributions converted to Roth accounts. It's complex but legal. The IRS hasn't challenged the structure in years.
You contribute after-tax dollars to your 401(k) beyond the normal limits. Your plan must allow in-service distributions or conversions. You immediately convert those after-tax dollars to Roth. No tax on conversion because you already paid tax on the contribution. Future growth becomes tax-free.
Not every 401(k) plan permits this. Many don't. But if you control your business and design your own plan, you build in the provisions that enable it. That's the advantage of business ownership applied to better tax planning.
Timing Income And Deductions
Cash-basis businesses control recognition timing for income and expenses within limits. Accelerating deductions into high-income years and deferring income until lower-income years reduces lifetime tax liability. The strategy requires planning beyond December 26th scrambles.
Deduction Acceleration Tactics
Prepaying expenses before year-end pulls deductions forward. Twelve months of rent, insurance, or subscriptions paid in December become current-year deductions under cash-method accounting. The economic outlay happens either way. The tax benefit shifts to when you need it most.
Section 179 expensing lets you deduct equipment purchases immediately rather than depreciating over five or seven years. For 2026, you can expense up to $1,220,000 in qualifying property. Buy that excavator in December instead of January – same business need, different tax year, potentially different rate environment.
Revenue recognition offers less flexibility under constructive receipt rules. You can't just refuse to deposit checks to avoid income. But you can delay December invoicing until January for work performed late in the year. You can structure contracts with payment terms that shift recognition periods. You maintain business relationships while optimizing tax timing.
The Fidelity midyear tax strategies discuss timing throughout the year, which correctly identifies that December planning alone misses most opportunities. You need quarterly reviews to spot the patterns.
Qualified Business Income Deduction
Section 199A created a 20% deduction for qualified business income from pass-through entities. It's not an above-the-line deduction. It's not an itemized deduction. It's a separate deduction reducing taxable income after standard or itemized deductions.
For business owners under the income thresholds – $197,300 single, $394,600 married filing jointly in 2026 – you generally get the full 20% deduction on qualified business income. Above those thresholds, limitations phase in based on W-2 wages paid and property used in the business.
Threshold Planning
Staying under the threshold maximizes the deduction without complicated calculations. Retirement contributions help. HSA contributions help. Anything that reduces adjusted gross income potentially keeps you under the cliff where limitations kick in.
The math gets intricate above the threshold:
- Calculate tentative QBI deduction (20% of qualified business income)
- Calculate W-2 wage limitation (50% of W-2 wages paid)
- Calculate alternative limitation (25% of W-2 wages plus 2.5% of unadjusted basis of property)
- Take the lesser of tentative deduction or greater of the two limitations
Specified service trades or businesses (SSTBs) face additional restrictions. Healthcare, law, accounting, consulting, financial services – these businesses lose the deduction entirely above threshold plus phaseout range. Entity restructuring sometimes helps. Separating non-SSTB activities into distinct entities preserves the deduction for that portion.
Strategic Charitable Giving
Charitable contributions deliver deductions for itemizers and accomplish philanthropic goals simultaneously. Business owners with significant wealth benefit from strategies beyond writing checks.
Donor-Advised Funds
You contribute appreciated assets to a donor-advised fund, claim the deduction immediately, and recommend grants to charities over time. The contribution comes off this year's return. The charitable impact extends across years.
This bunching strategy makes sense when itemized deductions barely exceed the standard deduction. You bunch multiple years of giving into one year, itemize that year, then take the standard deduction in years without contributions. Total giving remains the same. Total deductions increase because you clear the standard deduction threshold.
Appreciated stock works best. You deduct fair market value. You avoid capital gains tax on appreciation. The charity receives full value without tax leakage. Compare that to selling the stock, paying tax, and donating proceeds – you've lost 15-20% to capital gains tax.
| Strategy | Tax Benefit | Timing Flexibility |
|---|---|---|
| Cash donations | Deduction up to 60% AGI | None after contribution |
| Appreciated stock | Deduction + avoided capital gains | None after contribution |
| Donor-advised fund | Same as stock, plus bunching | Recommend grants over years |
| Private foundation | Deduction, control, legacy | Maximum control over timing |
Private foundations make sense at higher wealth levels. You get similar deductions with more control over distributions and investment management. The administrative complexity increases significantly. For most business owners, donor-advised funds deliver better tax benefits with trivial ongoing compliance.
Health Savings Account Maximization
HSAs triple-dip on tax benefits. Contributions are deductible. Growth is tax-free. Distributions for qualified medical expenses come out tax-free. No other account structure offers this combination.
For 2026, contribution limits are $4,300 individual, $8,550 family, plus $1,000 catch-up if you're 55 or older. You must have a high-deductible health plan. The HDHP requirement screens out many participants, which means many miss the opportunity.
Using HSAs As Stealth Retirement Accounts
Save all medical receipts. Pay out-of-pocket for medical expenses today. Let the HSA grow untouched. Decades later, reimburse yourself tax-free for those old expenses. The money compounds tax-free for 20-30 years, then comes out tax-free against receipts you've saved since 2026.
After age 65, you can take distributions for non-medical expenses and pay only income tax, no penalty. That makes HSAs function like traditional IRAs with better early-withdrawal rules and tax-free distributions if used for medical expenses. The comprehensive tax planning strategies discussed by NerdWallet correctly identify HSAs as overlooked better tax planning tools for business owners.
Medicare eligibility ends HSA contributions, so the window closes at 65. Front-loading contributions during high-earning years makes sense. Every dollar contributed reduces current tax at your marginal rate. Future medical expenses (which increase with age) get paid tax-free.
Tax-Loss Harvesting Mechanics
Capital losses offset capital gains dollar-for-dollar. Net losses offset up to $3,000 of ordinary income annually. Excess losses carry forward indefinitely. This creates opportunities to realize losses strategically while maintaining market exposure.
You sell positions with unrealized losses. You immediately purchase similar (but not substantially identical) securities to maintain market exposure. The loss becomes realized for tax purposes. Your market position remains essentially unchanged.
The wash sale rule prohibits repurchasing the same security within 30 days. Substantially identical means the IRS will disallow the loss if you sell Microsoft and rebuy Microsoft within the window. Selling Microsoft and buying another tech stock works fine. Selling an S&P 500 index fund and buying a different S&P 500 index fund from another provider creates gray area – similar enough that some argue it's substantially identical.
Conservative approach: sell the position, wait 31 days, repurchase the identical security. You're out of the market briefly, accepting that risk to guarantee the tax benefit.
Aggressive approach: sell and immediately buy a similar but not identical substitute. Sell VOO (Vanguard S&P 500 ETF), buy SPLG (SPDR S&P 500 ETF). They track the same index but aren't identical securities. Most tax professionals view this as permissible, though the IRS hasn't issued definitive guidance.
Partnership interests, business interests, and real estate don't qualify for the same treatment. Those assets face different rules. The strategy applies mainly to publicly traded securities held in taxable accounts. Retirement accounts don't generate taxable gains or deductible losses, so harvesting inside them accomplishes nothing.
Estimated Tax Payment Strategy
Underpayment penalties hit taxpayers who don't remit sufficient tax throughout the year via withholding or estimated payments. The penalty accrues interest on the underpayment at the federal short-term rate plus 3 percentage points. For 2026, that's approaching 8%.
You avoid penalties by meeting safe harbors:
- Pay 90% of current year tax liability
- Pay 100% of prior year tax liability (110% if AGI exceeded $150,000)
- Owe less than $1,000 when you file
The prior-year safe harbor provides planning flexibility. If 2025 was a lower-income year and 2026 income surges, you can base estimated payments on the lower 2025 figure, meet the safe harbor, and pay the difference at filing without penalty. You defer tax payments as long as possible without triggering penalties.
This isn't tax savings. It's cash flow management using the rules as written. The eventual tax liability remains unchanged. But holding onto funds for eight or ten extra months generates returns if deployed wisely. The economic benefit varies with interest rates and alternative investment returns.
High earners often face the 110% safe harbor threshold. If prior year AGI exceeded $150,000, you must pay 110% of prior year tax to avoid penalties. That number climbs quickly for successful businesses. Planning requires calculating the safe harbor figure and making quarterly payments sufficient to meet it.
Property Tax Basis Management
Cost basis determines capital gains when you sell business property or investments. Higher basis means lower gain. Lower gain means lower tax. Tracking and maximizing basis eliminates unnecessary tax on eventual dispositions.
For business property, basis includes purchase price plus improvements. Repairs maintain property – they're currently deductible. Improvements extend useful life or increase value – they're added to basis and depreciated. The distinction matters enormously.
Many business owners deduct improvement costs currently as repairs, reducing basis and increasing eventual gain. Better tax planning adds improvements to basis where required, takes legitimate depreciation deductions, and plans for eventual disposition when basis has been maximized through accumulated improvements.
Partnership interests gain basis through capital contributions and allocated income. Distributions and allocated losses reduce basis. Understanding these mechanics prevents unexpected taxable gain on distributions and preserves loss deductions that basis limitations might otherwise disallow.
Stock basis in S corporations follows similar rules. Loans from shareholders to the S corp can create debt basis permitting additional loss deductions. But the loans must be real economic loans, not paper shuffling. The IRS challenges this regularly when basis management gets aggressive.
Asset Protection And Tax Elections
Qualified Small Business Stock under Section 1202 offers potential exclusion of up to $10 million in gain from the sale of qualifying stock held more than five years. The business must be a C corporation with gross assets under $50 million. The stock must be acquired at original issue, not purchased secondhand.
This incentive encourages investment in small businesses and rewards patient capital. For eligible business owners, converting to C corporation status, meeting the requirements, and holding for five years can eliminate federal tax on $10 million in appreciation. State treatment varies.
The election requires planning years before any liquidity event. You can't convert six months before selling and claim the benefit. The five-year holding period runs from original issuance. The gross asset test must be satisfied during substantially all the holding period.
Not every business qualifies. Personal service businesses in health, law, accounting, consulting, financial services generally don't qualify. Hospitality, farming, mining, and several other industries face exclusions. But technology, manufacturing, wholesale, retail, and many other businesses potentially qualify if structured properly.
Real Estate Professional Status
Rental real estate typically generates passive losses under Section 469. Passive losses offset only passive income, not wages or business income. This limitation prevents high earners from sheltering active income with real estate losses.
Real estate professional status under Section 469(c)(7) converts rental real estate into non-passive activity. Losses become deductible against all income. The requirements are specific:
- More than half your personal services during the year in real property trades or businesses
- More than 750 hours during the year in real property trades or businesses
- Material participation in each rental activity (or group election)
Married couples filing jointly can aggregate one spouse's hours to meet the 750-hour requirement. That spouse must still perform more than half their working hours in real property trades or businesses. This enables business owners with real estate portfolios to have one spouse qualify, converting rental losses into currently deductible losses against business income.
The material participation requirement bites many taxpayers who meet the first two tests. You must participate more than 500 hours in the rental activity, or meet one of several alternative tests. Without material participation, the losses remain passive even if you qualify as a real estate professional.
Contemporaneous time records matter. The IRS routinely challenges real estate professional status in audits. Taxpayers who can't document hours lose the deduction. Calendars, logs, and third-party records substantiate the hours better than reconstructed estimates prepared during audit.
Better tax planning compounds across decades. The entity structure you choose in 2026 affects every return through exit. The retirement contributions you maximize now determine your 2046 retirement distributions. The basis tracking you maintain today prevents phantom gains in 2036. These aren't isolated tactics. They're systematic approaches to minimizing lifetime tax liability legally and sustainably. Taxt delivers this planning through a structured five-step process designed specifically for business owners who know their CPA isn't proactively identifying these opportunities. If you're ready to move beyond compliance-only tax services into strategic planning that actually reduces what you owe, the process starts with understanding where conventional advice stops and real planning begins.
