Tax Strategies for High-Income Earners Making $400K+

At $400,000 of household income, you've crossed into a different tax universe. The 32% and 35% federal brackets kick in, the 3.8% Net Investment Income Tax applies, the additional 0.9% Medicare surtax shows up, and the deductions that used to help: student loan interest, traditional IRA contributions, child tax credit: are mostly phased out. The good news: this is the income range where proactive tax planning produces the biggest dollar returns.

1. Max every tax-advantaged account, then go further

Start with the basics: 401(k) at $23,000, HSA at $4,150 single / $8,300 family, FSA where available. Then layer in the strategies most high earners miss: Mega Backdoor Roth (up to $46,000 after-tax 401(k) → Roth if your plan allows), Backdoor Roth IRA ($7,000), and Defined Benefit / Cash Balance plans for business owners who can shelter $100K-$300K per year on top of the 401(k).

2. Use a Donor-Advised Fund for bunched giving

If you give to charity regularly, a Donor-Advised Fund (DAF) lets you front-load several years of donations into one tax year: getting you above the standard deduction and unlocking a bigger itemized deduction. Fund with appreciated stock instead of cash and you also avoid capital gains tax on the appreciation. For a $400K household giving $15,000/year, bunching three years into one DAF contribution typically produces $5,000-$8,000 in additional tax savings.

3. Cost segregation on real estate

If you own rental property or commercial real estate, a cost segregation study reclassifies portions of the building into 5, 7, and 15-year property: accelerating depreciation and creating large paper losses. Pair with Real Estate Professional status (if a spouse qualifies) and those losses can offset W-2 income directly. We've seen single studies generate $80,000-$200,000 in first-year deductions.

4. Tax-loss harvesting and direct indexing

High earners with taxable brokerage accounts should be harvesting losses every year: not just in December. Direct indexing platforms can generate 1-2% in 'tax alpha' annually by selling individual losing positions while staying market-exposed. Over a decade that compounds into six figures of tax savings for portfolios over $500K.

5. Entity restructuring for business owners

If you own a business, the entity structure choices multiply at this income level. S-Corp for SE tax savings, C-Corp for retained earnings strategies, holding company structures for asset protection, and family limited partnerships for estate planning. Each one has tradeoffs and the right answer depends on your specific cash flow, exit timeline, and family situation.

6. Watch the AMT and NIIT traps

• NIIT (3.8%) applies to investment income above $250K MAGI for married filing jointly: plan large capital gains around it
• AMT can still hit on large ISO exercises or specific deduction patterns
• Phaseouts on QBI, child tax credit, and education credits compound silently: model before December
• State tax matters more than ever; if you're in a high-tax state, residency planning can save 5-13% on its own

Why high earners need a year-round tax advisor

At this income level, waiting until April to think about taxes means leaving five and six figures on the table. The strategies above only work if they're implemented before December 31: and most require multi-year planning. We work with high-income clients quarterly: projecting tax liability, modeling decisions before they're made, and coordinating with financial advisors and estate attorneys so nothing slips through the cracks.