---
title: "Optimizing 401(k) Contributions In 2026: Pre-Tax Or Roth?"
description: Optimiziing 401k in 2026
image: https://blog.scmadvice.com/hubfs/401k.jpeg
---

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###### by [Gregory S. Ostrowski](https://blog.scmadvice.com/author/gregory-s-ostrowski)

on April 15, 2026

# Optimizing 401(k) Contributions In 2026: Pre-Tax Or Roth?

 

\*Originally published for [Forbes](https://www.forbes.com/councils/forbesfinancecouncil/2026/03/09/optimizing-401k-contributions-in-2026-pre-tax-or-roth/) on March 9, 2026 

If you’re still contributing to your 401(k) the same way you were five years ago—same percentage, same tax treatment—you may be leaving opportunity (or flexibility) on the table.

In 2026, contribution limits are higher. Tax laws have evolved. And under SECURE 2.0 legislation, some higher earners no longer have a choice when it comes to catch-up contributions.

The question is no longer just “How much should I contribute?” It’s also, “Should I contribute pre-tax or Roth?” Let’s break it down.

## 2026 Contribution Limits: What’s Available

For 2026, [the IRS allows](https://www.irs.gov/newsroom/401k-limit-increases-to-24500-for-2026-ira-limit-increases-to-7500):

• $24,500 in employee contributions

• $8,000 catch-up contributions for those age 50+

• 60-to-63-year-olds can add another $3,250 as a “super catch-up” contribution

But contribution amounts are only half the strategy. The tax treatment matters just as much.

## Pre-Tax Vs. Roth 401(k): The Real Trade-Off

Both options have their tax-advantages while they grow over time. The difference is when you pay taxes. Let’s examine both:

### 1. Pre-Tax 401(k): Lower Taxes Today

Pros:

• Reduces your taxable income immediately

• May lower your current tax bracket

• Provides larger "take-home" pay today

• May prove beneficial if you expect to be in a lower bracket in retirement

Cons:

• Fully taxable when withdrawn

• Increases future required minimum distributions (RMDs)

• Can push retirees into higher tax brackets later

• May increase Medicare premium surcharges (income-related monthly adjustment amount - IRMAA).

Pre-tax contributions can be ideal during peak earning years, especially if you’re in one of the highest marginal tax brackets. But here’s the risk: If all your retirement assets are pre-tax, you could be creating a future tax problem.

### 2. Roth 401(k): Pay Taxes Now, Not Later

Pros:

• Tax-free withdrawals in retirement upon age 59.5+

• No RMDs on Roth 401(k)s or Roth IRAs

• Can provide tax diversification, which can ultimately provide "levers" to pull in retirement to help control taxable income

Cons:

• No upfront tax deduction

• Smaller net paycheck today

• May not be ideal if you’re currently in a very high tax bracket

Roth contributions are often attractive if you expect tax rates to rise, you’re earlier in your career, you want flexibility in retirement withdrawals or you’re concerned about long-term tax policy risk.

## New For 2026: High Earners Must Use Roth For Catch-Up

Here’s where 2026 planning gets interesting. Under SECURE 2.0: If you earned more than $150,000 (indexed for inflation) in wages in the prior year, your catch-up contributions must be made as Roth.

That means no more pre-tax catch-up contributions for higher earners, and the extra $8,000 (or enhanced catch-up for those age 60 to 63) will be taxable today. Additionally, you’ll automatically be building a tax-free bucket.

Some see this as a negative because it removes flexibility. But strategically? It may not be a bad thing. For many high earners in their 50s, building Roth exposure helps create tax bracket control in retirement, reduced lifetime RMD pressure, potential for better estate planning flexibility and a hedge against future tax increases.

In other words, SECURE 2.0 may be forcing some tax diversification that many investors arguably needed anyway.

## Deciding How Much To Contribute

Now that we’ve covered tax treatment, let’s revisit contribution strategy.

Here are five smart questions to ask yourself:

1. Are you capturing the full employer match? This is nonnegotiable. Free money compounds.

2. Has your income increased recently? If you received a raise but didn’t increase contributions, you effectively lowered your savings rate. A simple strategy: Consider increasing your contribution by half of every raise.

3. Are you in a peak earning year? High earners in peak tax brackets may favor pre-tax contributions (except catch-ups, if mandated Roth).

4. Do you have tax diversification? If 90% of your assets are pre-tax, adding Roth may improve long-term flexibility. If 90% is Roth, pre-tax contributions could reduce today’s tax burden. Part of the beauty here is that you can mix and match and there’s no one right way.

5. What does retirement income actually look like? Many retirees may discover Social Security is taxable, pension income is taxable and required distributions increase taxable income.

Without planning, retirement can become more taxable than expected. The right contribution mix can help smooth lifetime taxes—not just this year’s bill.

## What Smart Contribution Planning Really Buys You

Choosing the right amount and tax structure isn’t about hitting a number. It’s about buying more flexibility, potential predictability, protection against tax surprises and, ultimately, increased control over your retirement income.

A well-balanced tax strategy may save tens of thousands—and sometimes hundreds of thousands—over a lifetime. And in today’s legislative environment, tax diversification is likely more prudent than ever.

## Don’t Guess At Tax Strategy

Retirement planning in 2026 is more complex than it was a decade ago. Over time, contribution limits, tax laws, market cycles and your income all change. Your 401(k) strategy should evolve too. When’s the last time you reviewed your contribution percentages and your pre-tax versus Roth mix?

Remember, retirement isn’t just about how much you save—it’s also about how much you keep.

*Securities Through Independent Financial Group, LLC (IFG), a Registered Broker-dealer. Member Finra/Sipc. Advisory Services Offered Through Scarborough Capital Management (SCM), a Registered Investment Advisor. Registration as an Investment Adviser Does Not Imply a Certain Level of Skill or Training. IFG and Scarborough Capital Management Are Unaffiliated Entities. The Information Provided Here Is General in Nature and Should Not Be Considered Investment, Tax or Financial Advice. Investing in Securities Involves Certain Risks Which Can Include the Loss of Principal Invested. Neither IFG nor SCM Provide Tax or Legal Advice. You Should Consult With a Licensed Professional for Advice Concerning Your Specific Situation.*

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