8 Tax Strategies High-Income Earners Should Run Before Their CPA Files

8 Tax Strategies High-Income Earners Should Run Before Their CPA Files

By the time most high earners send their CPA a shoebox of 1099s in March, the game is already over.

Here's the thing nobody tells you: nearly every meaningful move that lowers a big tax bill has to happen before the year closes — sometimes years before. Filing season is just data entry. The savings were decided last October.

So if you're a business owner clearing $500K, or a partner, surgeon, or founder with a W-2 that makes accountants nervous, the best high income tax strategies are the ones you run in advance — not the ones you discover when the return is already drafted. Here are eight worth pressure-testing before anyone hits "file."

1. The high income tax strategy that shelters more than any 401(k): a cash balance plan

A solo 401(k) caps out fast. A defined benefit or cash balance plan does not.

These plans fund a future pension benefit, and the contribution is calculated by an actuary based on your age, income, and years to retirement — not a flat dollar cap. The older you are and the more you earn, the more you can stuff in. For a 55-year-old high earner, annual contributions in the $150,000 to $250,000 range are common.

The ceiling is the maximum annual benefit under IRC §415(b), which sits around $280,000 of annual benefit for 2025. That's not the contribution — it's the benefit the plan can promise — but it's why these plans absorb so much income. If you're over 45 with strong, stable profit, this is often the single biggest lever on the list.

2. Bunch your charitable giving into a donor-advised fund

If you give to charity anyway, the question isn't whether — it's when.

A donor-advised fund (DAF) lets you front-load several years of giving into one high-income year, take the full deduction now, and dole the money out to charities on your own timeline later. You capture the deduction in the year your marginal rate is highest, which is exactly when it's worth the most.

The math: bunching three years of $30,000 gifts into a single $90,000 DAF contribution can push you well over the standard deduction in that year — turning gifts that would otherwise yield no marginal benefit into a real one. Fund it with appreciated stock instead of cash and you skip the capital gains tax on the gain, too.

3. Section 1202 (QSBS) can exclude millions in gain — if the structure was built early

This is the one that makes founders cry when they learn it too late.

Qualified Small Business Stock under IRC §1202 lets you exclude a large chunk of gain when you sell stock in a qualifying C-corporation. For QSBS acquired on or before July 4, 2025, the long-standing rule applies: hold five years and exclude up to $10 million of gain (or 10x your basis) per issuer.

The 2025 tax law expanded this going forward. For stock acquired after July 4, 2025, there's now a tiered exclusion — partial relief at three and four years, full at five — and a higher per-issuer cap of $15 million. The catch hasn't changed: the company has to be a C-corp, the stock has to be original issuance, and the clock starts at acquisition. You can't bolt this on the year you sell. Verify the current thresholds with your CPA, because this area is still settling.

4. The backdoor (and mega backdoor) Roth, even above the income limits

High earners get phased out of direct Roth IRA contributions. The backdoor doesn't care.

You contribute to a non-deductible traditional IRA, then convert it to a Roth. Done cleanly — watch the pro-rata rule if you hold other pre-tax IRA money — it moves cash into tax-free growth regardless of income.

The mega backdoor goes bigger: if your 401(k) plan documents allow after-tax contributions and in-plan conversions, you can move tens of thousands more into Roth treatment each year on top of your regular deferral. That "if the plan allows it" is the whole game — many plans don't, and you won't know until someone reads the document.

5. Time loss harvesting and gain recognition across the December–January line

Brackets reset at midnight on December 31. Smart sellers plan around that line.

Tax-loss harvesting — selling losing positions to offset gains — is well known. The advanced move is timing: deferring a gain into January when this year is already heavy, or pulling a loss into December when you need it now. Watch the wash-sale rule on anything you plan to rebuy within 30 days.

The math: shifting $150,000 of recognized gain from a 37% bracket year into a lower-income year can save five figures with nothing changing except the calendar.

6. Make the S-corp election work harder than your payroll software does

If your business income runs through an S-corp, the salary-versus-distribution split is doing real work — or it isn't.

You pay payroll tax on your "reasonable" salary, but not on distributions. Set the salary too high and you overpay Medicare tax; set it indefensibly low and you invite an IRS reclassification. The sweet spot is documented, defensible, and revisited every year as profit changes. On $400K of S-corp profit, getting this split right instead of running everything as salary can save meaningful Medicare and Social Security tax annually.

7. Pair a QBI deduction review with your entity and comp decisions

The Section 199A qualified business income deduction can knock 20% off qualifying pass-through income — but high earners hit phase-outs and the "specified service" trap (think doctors, lawyers, consultants).

Above the income thresholds, the deduction depends on W-2 wages your business pays and the basis of its property. That means your salary, your entity choice, and your QBI deduction are one connected decision, not three. A planner who models them together can sometimes restructure compensation to recapture a deduction you'd otherwise lose entirely.

8. The high income tax strategy nobody runs solo: put your kids, real estate, and timing on one chessboard

The last strategy isn't a single move — it's coordination.

Hiring your kids in a legitimate business role shifts income to their low or zero bracket. A cost segregation study can accelerate depreciation on real estate you already own. Roth conversions in a low-income year, installment sales, and charitable remainder trusts all interact. Run in isolation, each is fine. Sequenced together by someone who sees the whole board, they compound.

That's the difference between a preparer and a planner. One records what happened. The other changes what happens.

Find a CPA who plans before April — not one who just files in April

If reading this list gave you a quiet "wait, why hasn't my accountant mentioned any of these?" — that's the point.

Most of these moves require a CPA who works with you across the year, not one who surfaces every March to type your numbers into software. That's the model CPA on Fire is built around: former Big 4 background, concierge tax strategy, and proactive planning aimed squarely at high earners and business owners.

Read CPA on Fire's verified reviews on Sam's List, then book an intro call before the next year-end deadline quietly closes the door on these strategies. The savings get decided in advance — so the conversation should happen in advance too.