Shifting Assets into Tax-Advantaged Accounts

The Core Idea

If you’re a high earner with significant savings already accumulated in taxable accounts — bank accounts, brokerage accounts, money market funds — and you don’t expect to need most of those savings until retirement, you may be leaving meaningful tax savings on the table. The U.S. tax code offers several tax-advantaged accounts that shelter contributions, growth, or withdrawals (sometimes all three) from taxation. Shifting assets from taxable accounts into these tax-advantaged accounts, gradually and within annual limits, can significantly reduce the lifetime tax drag on your savings.

The main accounts to consider are:

• Employer-sponsored retirement plans: 401(k), 403(b), and 457 plans
• Individual Retirement Arrangements (IRAs): Traditional and Roth
• Health Savings Accounts (HSAs), available to those enrolled in a qualifying high-deductible health plan
• 529 plans, if you are planning to pay for education for your dependents — or yourself

Each has its own rules, contribution limits, and tax treatment. Understanding them as a portfolio — and using each one to its fullest — is the foundation of tax-efficient long-term saving.

Traditional vs. Roth: Two Ways to Get the Tax Break

Most retirement accounts come in two flavors: Traditional and Roth. The distinction matters because it determines when you get the tax benefit.

Traditional accounts give you a tax deduction today. You contribute pre-tax dollars (or deduct your contribution from current-year income), the money grows tax-deferred over the years, and you pay ordinary income tax when you withdraw in retirement. The bet is that your tax rate in retirement will be lower than your tax rate today.

Roth accounts flip this around. You contribute after-tax dollars — no deduction today — but the money grows tax-free, and qualified withdrawals in retirement are completely tax-free. The bet is that the value of decades of tax-free growth (plus tax-free withdrawals) outweighs the upfront tax savings you’d have gotten from a Traditional contribution.

The Traditional vs. Roth distinction applies to 401(k)/403(b)/457 plans, and to IRAs. Many high earners can no longer contribute to a Roth IRA directly because of income phase-outs, though strategies like the Backdoor Roth exist to work around that.

HSAs are a special case. Contributions are pre-tax (Traditional-style), and growth is tax-deferred. But if you eventually withdraw the funds to pay for qualifying medical, dental, or vision expenses, the withdrawal is also tax-free — effectively giving you the best of both Traditional and Roth treatment. If you withdraw HSA funds for non-medical reasons after age 65, the funds are taxed as ordinary income (like a Traditional account). For people who can afford to pay current medical bills out of pocket and let the HSA grow untouched, the HSA can become one of the most tax-efficient accounts available.

529 plans function roughly like Roth accounts: contributions are made with after-tax dollars (no federal deduction, though some states offer one), growth is tax-free, and withdrawals are tax-free when used for qualified education expenses (subject to limits for private K-12 education). Some flexibility exists to roll unused 529 funds into a Roth IRA for the beneficiary, subject to limits and conditions.

Annual Contribution Limits

A central feature of every tax-advantaged account is that you can only contribute a limited amount each year. This is by design — Congress set the limits to balance individual tax benefits against revenue impact. For 2026, the headline limits are:

• 401(k), 403(b), 457: $24,500 employee contribution limit. Catch-up contribution of $8,000 if age 50+. (Some plans support even higher caps for those aged 60-63, with some limitations.)
• IRA (Traditional or Roth): $7,500 contribution limit. Catch-up contribution of $1,100 if age 50+.
• HSA: $4,400 for those with self-only HSA coverage, $8,750 for family coverage. Catch-up contribution of $1,000 if age 55+.
• 529 plans: No federal contribution limit, but contributions above $19,000 per beneficiary per year (2026 annual gift exclusion) require gift tax reporting. Lifetime aggregate limits vary by state plan.

Because of these annual caps, building up significant balances in tax-advantaged accounts is a multi-year effort. There’s no way to dump $500,000 of taxable savings into a 401(k) all at once. The shift happens gradually, year after year, and that’s why high earners benefit from starting early and contributing the maximum every year.

A Strategy for Shifting Taxable Savings

If you have substantial savings in taxable accounts and your goal is to shift those dollars into tax-advantaged accounts over time, the mechanics are subtle but powerful.

401(k), 403(b), and 457 contributions can only come from payroll — you can’t write a check to your retirement plan. This creates an opportunity for someone with significant taxable savings: contribute aggressively to your 401(k) through payroll deduction, even if doing so reduces your take-home pay below your living expenses. You make up the gap by drawing from your taxable brokerage or savings accounts. The net effect is that you’ve effectively transferred dollars from a taxable account into a tax-sheltered account, taking advantage of the contribution limit each year.

Employer contributions are on top of the employee limit. Your employer’s 401(k) match, profit-sharing, or other employer contributions don’t count against your $24,500 employee contribution limit. The total combined limit (employee plus employer) for 2026 is $72,000, so high-match employers create even more room to shelter assets.

After-tax 401(k) contributions can fill the gap between your deferrals + employer contributions and the $72,000 cap — and if your plan permits in-service distributions, those after-tax dollars can be moved into a Roth via the Mega Backdoor Roth, potentially adding tens of thousands of dollars per year of Roth growth.

Self-employed individuals can contribute as both employee and employer, which dramatically increases the total they can shelter each year. Through a Solo 401(k) or SEP-IRA, a self-employed person may be able to contribute well into the $60,000–$70,000 range annually depending on net self-employment income.

The IRA limit of $7,500 is much lower than the 401(k) limit, but it’s still meaningful — especially over many years. And IRAs offer flexibility that employer plans don’t: you control the custodian, the investment options, and (in the case of Roth IRAs) potentially the tax treatment.

HSAs deserve special attention for high earners. The contribution limit is small, but the triple tax advantage (deductible going in, tax-free growth, tax-free out for medical) makes every dollar contributed unusually valuable. If you’re enrolled in a qualifying high-deductible health plan and can afford to pay current medical expenses out of pocket, maxing the HSA every year — and investing the balance for long-term growth — is a powerful and underused strategy.

The Trade-Off: Limitations on Withdrawals

The benefits of tax-advantaged accounts come with strings attached. The IRS imposes restrictions on when and how you can withdraw funds, and these restrictions are part of why the accounts exist in the first place — they’re designed to encourage long-term saving for specific purposes.

A non-exhaustive sample of limitations to be aware of:

• 401(k), 403(b), 457, and Traditional IRAs: Withdrawals before age 59½ generally trigger a 10% early-withdrawal penalty on top of ordinary income tax. Required Minimum Distributions (RMDs) begin at age 73 (or 75, depending on birth year) for most retirement accounts, forcing taxable withdrawals whether you need the money or not.
• Roth IRAs: Contributions can be withdrawn at any time without penalty, but earnings withdrawn before age 59½ (or before the account has been open five years) may be subject to taxes and penalties. Roth funds are not subject to RMDs.
• HSAs: Withdrawals for non-qualifying expenses before age 65 are subject to ordinary income tax plus a 20% penalty. After age 65, non-medical withdrawals are taxed as ordinary income but the penalty disappears.
• 529 plans: Withdrawals not used for qualified education expenses are subject to ordinary income tax and a 10% penalty on the earnings portion. The SECURE 2.0 Act allows limited rollovers from 529s to Roth IRAs under specific conditions. You may also be able to shift funds between beneficiaries.

These limitations are why tax-advantaged accounts work best for funds you genuinely don’t expect to need before retirement (or before you need to pay education expenses, in the case of 529s). Money you might need for a home down payment, an emergency, or near-term life events should generally stay in taxable accounts.

The Takeaway

Tax-advantaged accounts are one of the most powerful tools available for reducing the lifetime tax drag on your savings — but the benefit compounds slowly. Every year you contribute the maximum to your 401(k), IRA, HSA, and 529 (if applicable), you’re permanently shifting assets into a more tax-efficient structure. For someone with significant savings in taxable accounts, an intentional multi-year strategy of maximizing every available tax-advantaged bucket — and supplementing reduced take-home pay from payroll-deducted 401(k) contributions with draws from taxable savings — can move a substantial portion of net worth into tax-sheltered status over time. The trade-off is reduced flexibility: withdrawal rules, penalties, and required distributions all constrain how and when you can access these funds. Whether the trade-off makes sense depends on your circumstances, but for many high earners with secure income and long horizons, the math strongly favors filling these buckets every year.