Tax Planning for Six-Figure W-2 Earners

If you earn $100,000 or more as a W-2 employee, you are likely paying more in taxes than necessary. While your employer handles withholding, that automatic process is not optimized for your specific situation — especially if you have multiple income sources.

The Problem with Default Withholding

Your employer withholds taxes based on the information you provide on your W-4. But that calculation does not account for:

• Rental property income or losses
• Side business or freelance income
• Investment gains or losses
• Your spouse's income and withholding
• Deductions and credits you may qualify for

The result? You either owe a surprise bill in April, or you get a large refund — which means you gave the government an interest-free loan all year.

Who Needs Tax Planning (Not Just Filing)

You likely need proactive tax planning if you:

• Earn $100K+ in W-2 income
• Have income from multiple sources (salary + rental + side business)
• Are married with two incomes
• Own rental properties or short-term rentals
• Have stock compensation (RSUs, ISOs, ESPP)
• Expect significant income changes

Key Tax Planning Strategies for W-2 Earners

1. Retirement Account Maximization

Contributing the maximum to 401(k), IRA, and other retirement accounts can significantly reduce your taxable income. For 2024, you can contribute up to $23,000 to a 401(k) ($30,500 if over 50).

2. Health Savings Account (HSA) Strategy

If you have a high-deductible health plan, HSA contributions are triple tax-advantaged: tax-deductible going in, tax-free growth, and tax-free withdrawals for medical expenses.

3. Tax-Loss Harvesting

If you have investment accounts, strategic selling of losing positions can offset gains and reduce your tax bill.

4. Charitable Giving Optimization

Bunching charitable contributions or using donor-advised funds can maximize your itemized deductions in high-income years.

5. Multi-Income Coordination

If you have rental properties or a side business, coordinating these income sources with your W-2 income requires year-round attention to minimize your overall tax burden.

Why Filing Alone Is Not Enough

Tax filing looks backward — it reports what already happened. Tax planning looks forward — it shapes what will happen. For six-figure earners, the difference can be substantial.

Frequently Asked Questions

I already have a CPA who files my taxes. Do I need planning?

Filing and planning are different services. Many CPAs focus on compliance — getting your return filed accurately. Strategic planning involves year-round projections, entity optimization, and proactive adjustments that go beyond annual filing.

When should I start tax planning?

The best time to start is at the beginning of the year or when your income situation changes. Waiting until December limits your options.

How do I know if I am overpaying?

Signs include: large refunds or surprise bills, no quarterly projections, uncertainty about optimal retirement contributions, and reactive rather than proactive conversations with your tax preparer.