You didn’t do anything wrong. But there are probably some levers you’re not pulling.
A big tax bill in April usually means one of a few things: you had a great income year (good), but your money wasn’t set up to work as hard as it could have (fixable). Here’s where to start.
First: That Tax Bill Might Just Be a Withholding Problem
If you’re a W-2 employee and you owed a lot, the simplest explanation is that your employer wasn’t withholding enough from each paycheck throughout the year.
The fix is straightforward: update your W-4 with your employer. You can ask HR for the form anytime; you don’t have to wait until you get a new job. The W-4 tells your employer how much to withhold. If life changed last year (you got a big bonus, your spouse started working, you had a kid), your withholding probably didn’t keep up.
The goal isn’t to get a giant refund; that’s actually you giving the government an interest-free loan all year. The goal is to break roughly even, so your money stays in your pocket month-to-month, and you’re not surprised in April.
Quick action: Talk to HR or your payroll department, or use the IRS withholding estimator at IRS.gov to see if you need to adjust.
Second: Are You Actually Using Your Retirement Accounts?
This is where high earners quietly leave the most money on the table.
Your 401(k) lets you put away up to $24,500 in 2026, $32,500 if you’re 50 or older. That money comes out of your paycheck before taxes, which means you’re reducing the income the IRS can tax you on right now. If you got hit with a big tax bill, contributing more here is one of the most direct ways to lower it next year.
If your employer offers a Health Savings Account (HSA) alongside a high-deductible health plan, this one often goes overlooked. You put money in a pre-tax account, it grows tax-free, and it comes out tax-free when you use it for medical expenses. That’s three tax wins in one account. The limit is $4,400 if it’s just you, or $8,750 for a family.
The mindset shift: These accounts aren’t just “retirement stuff.” They’re one of the most powerful tools you have to legally reduce what you owe the IRS each year.
Third: Roth Conversions, Paying Tax Now So You Pay Less Later
Here’s a situation a lot of diligent savers find themselves in: they’ve been contributing to a traditional 401(k) or IRA for years, and they have a significant balance, sometimes $500K, $800K, $1M+. That’s great. But every single dollar of it will be taxed as ordinary income when they take it out in retirement.
A Roth conversion is when you move some of that money into a Roth account. You pay tax on it now, at today’s rates, and then it grows completely tax-free from that point on. You never pay taxes on it again.
The key is doing it in careful, deliberate chunks, not all at once. Converting too much in a single year can push you into a higher bracket, or trigger higher Medicare premiums down the road (yes, that’s a real thing). A good financial planner can help you figure out the right amount to convert each year.
Plain version: Think of it as slowly moving money from a “pay taxes later” bucket to a “never pay taxes again” bucket, ideally in years when your tax rate is lower.
Fourth: The Backdoor Roth, For When You Earn Too Much
Normally, you can contribute directly to a Roth IRA, but if you earn above roughly $150K single or $236K married, the IRS starts phasing out your ability to do that.
The backdoor Roth is a legal workaround. Here’s how it works in plain terms:
- You put money into a traditional IRA (anyone can do this, no income limits)
- You then convert that IRA to a Roth
That’s it. You end up in the same place, money in a Roth, growing tax-free just through a different door. The annual limit is $7,500 ($8,600 if you’re 50+).
One thing to know: if you already have money sitting in other traditional IRAs, there’s a tax calculation called the pro-rata rule that can complicate things. Worth flagging with an advisor before you do it, but don’t let that stop you from asking the question.
Fifth: What Are You Actually Invested In?
This one doesn’t get talked about enough in tax conversations, but it matters.
Not all investments are taxed the same way. Some things to know:
- Short-term gains (investments held less than a year) are taxed at your regular income rate, which for high earners can be 32%, 35%, or higher.
- Long-term gains (held more than a year) are taxed at a much lower rate 0%, 15%, or 20%, depending on your income.
- Index funds and ETFs tend to be more tax-efficient than actively managed funds because they buy and sell less frequently, generating fewer taxable events.
- Where you hold things matters too. High-growth investments are often better inside a Roth (where they grow tax-free). Bonds or dividend-heavy funds might make more sense in a tax-advantaged account. This is called asset location, and it’s a real lever.
You don’t need to overhaul everything. But if you’ve never looked at what you’re actually invested in through a tax lens, it’s worth a conversation.
The Takeaway
A big tax bill isn’t just bad luck; it’s usually a signal. Something in your setup wasn’t optimized, and now you have 12 months to fix it before it happens again. The four areas above, withholding, retirement accounts, Roth strategies, and your investments, are where most high earners find the most room to improve.
None of this requires being a tax expert. It just requires asking the right questions while there’s still time to act.
Adrienne Davis Hill, CPA, CFP®
References
- Internal Revenue Service. (2025). Publication 15-T: Federal income tax withholding methods. U.S. Department of the Treasury. https://www.irs.gov/publications/p15t
- Internal Revenue Service. (2025). Publication 590-A: Contributions to individual retirement arrangements (IRAs). U.S. Department of the Treasury. https://www.irs.gov/publications/p590a
- Internal Revenue Service. (2025). Retirement topics — 401(k) and profit-sharing plan contribution limits. U.S. Department of the Treasury. https://www.irs.gov/retirement-plans/plan-participant-employee/retirement-topics-401k-and-profit-sharing-plan-contribution-limits
- Internal Revenue Service. (2025). HSA contribution limits and other requirements. U.S. Department of the Treasury. https://www.irs.gov/publications/p969
- Internal Revenue Service. (n.d.). Tax withholding estimator. U.S. Department of the Treasury. https://www.irs.gov/individuals/tax-withholding-estimator
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