Five verticals, each with its own tax position and vocabulary.

A SaaS company is one of the hardest businesses to account for well and one of the easiest to overpay on. Revenue recognition under ASC 606 means the cash that hits your bank in January is not the revenue you report in January, and a CPA who treats your books on a pure-cash basis will misstate both your margins and your tax position. Deferred revenue has to be tracked as a liability, recognized over the service period, and reconciled every close, or your financials will not survive a diligence review.

The single most common money left on the table is the R&D tax credit. Software development wages, contractor costs, and a portion of cloud infrastructure frequently qualify, and the credit offsets payroll tax for pre-profit companies through the qualified small business election. Most early-stage founders are told their CPA does not do credits. That is a reason to change CPAs, not a reason to skip the credit.

Entity structure matters more as you grow. C-corp versus pass-through changes your tax bill, your ability to raise priced equity, and your eligibility for qualified small business stock treatment on an eventual exit. QSBS can exclude a large share of gain from federal tax if the structure and holding period are right, and that planning has to happen years before a sale. Remote engineering hires also create state nexus, which means payroll and income-tax filing obligations in states you have never visited.

A professional service firm is mostly people and judgment, which makes owner compensation the central tax decision. If the firm is an S-corporation, the IRS requires a reasonable salary for the owners before profit distributions, and getting that number wrong in either direction is expensive. Set it too low and you invite a payroll-tax adjustment with penalties. Set it too high and you give up the self-employment-tax savings that made the S-election worth filing in the first place.

The Texas franchise tax and the federal SALT deduction cap both shape the structure conversation. The pass-through entity tax election lets the firm pay state tax at the entity level and deduct it federally, which restores a deduction the $10,000 SALT cap otherwise removes for the owners. For a profitable multi-partner firm, the PTET election is often worth several thousand dollars a year and is routinely missed.

Cash versus accrual accounting changes when income is taxed, and a firm that bills in arrears can often defer tax legitimately by choosing the right method. Partner buy-ins and buy-outs need to be structured before they happen, because the difference between a capital event and ordinary income is decided by the agreement, not discovered at filing. Profit distribution timing across December and January is a simple lever that a strategist uses and a return filer never mentions.

Real estate is the most depreciation-driven asset class an individual can own, and depreciation is where most investors leave the largest amounts on the table. Standard straight-line depreciation spreads a building over decades. A cost segregation study reclassifies components such as flooring, fixtures, and land improvements into shorter recovery periods, accelerating deductions into the early years when they are most valuable. Paired with bonus depreciation, the first-year deduction on a recently acquired property can be substantial, though the bonus percentage is phasing down and the timing now matters.

The 1031 like-kind exchange lets you defer gain when you sell one investment property and reinvest in another, but it runs on strict deadlines: 45 days to identify replacements and 180 days to close. Miss either and the deferral is gone. The exchange has to be set up before the sale closes, never after.

The reason many investors cannot use their depreciation losses is the passive activity loss rules. Rental losses are passive by default and can only offset passive income unless you qualify as a real estate professional or use the short-term rental treatment, where average stays of seven days or less can move the activity out of the passive bucket. Whether your losses shelter your other income is a planning question, decided by how you structure and document your time.

A restaurant lives or dies on prime cost, the combination of food cost and labor cost as a share of sales. A CPA who only files your return at year-end cannot help you here. You need monthly numbers, fast enough to act on, with food cost and labor tracked against industry-aware targets so a slow drift becomes visible before it becomes a crisis.

The most overlooked restaurant tax benefit is the FICA tip credit. When employees report tips, the restaurant pays the employer share of payroll tax on those tips, and a federal credit refunds much of that cost. For a venue with a large tipped staff, the credit is meaningful every single year, and it is missed constantly because it requires the preparer to actually know the restaurant industry.

Sales tax is a compliance trap rather than a planning opportunity. Texas rules on prepared food, catering, and packaged goods are not intuitive, filing is frequent, and the penalties for getting it wrong compound quickly. Cash handling is the other quiet risk: without real controls, skimming and breakage are invisible, and the tax return cannot tell you about money that was never recorded. Operators running more than one location also need an entity structure that isolates risk and keeps each venue legible on its own.

Plenty of people who do not own a business still have a genuinely complex return, and equity compensation is the usual reason. Restricted stock units are taxed as ordinary income when they vest, often under-withheld, which produces a surprise balance due in April. Incentive stock options can trigger the alternative minimum tax on exercise, sometimes on gains that exist only on paper. Non-qualified options and employee stock purchase plans each have their own timing rules. None of this is improvised well in March. It is planned during the year, with vesting and exercise dates on a calendar.

Retirement and charitable planning are the cleanest levers. The backdoor Roth contribution and, where a workplace plan allows after-tax contributions, the mega backdoor Roth, let high earners build tax-free retirement balances that income limits would otherwise block. Charitable bunching, concentrating several years of giving into one year through a donor-advised fund, can push you above the standard deduction in the years you give and keep it simple in the years between.

Concentrated stock is a risk problem and a tax problem at once: selling to diversify triggers capital gains, so the unwind has to be paced and coordinated with your other income. Income across more than one state, whether from remote work, a move, or property, means deciding where each dollar is taxed rather than letting two states each claim it.