Retirement Retirement Planning

How Much of a Difference Does Upping Your 401(k) by 1% Really Make?

The answer may surprise you.

By Catherine Collins , Edited by Laura Hohenstein

Updated May 6, 2026

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Many people set up their 401(k) contributions through work and rarely revisit their retirement plan strategy. However, making a point to increase contributions each year, even by 1%, can significantly increase your nest egg by retirement.

Here is an explanation of why that is, along with important information about 2026 401(k) policy changes and how your work plan may be able to increase your contributions automatically.

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The powerful math behind 1% incremental 401(k) contributions

It might not seem like increasing 401(k) contributions by 1% would make a significant difference, but when viewed over a long time horizon, the math tells a different story.

Fidelity has a retirement calculator that assumes an average annual return of 7%. Additionally, the calculator assumes a 4% annual salary increase. Using Fidelity's calculator with different incomes and time horizons helps show the positive impact that a 1% annual contribution increase makes.

For example, according to Fidelity's calculator, a 22-year-old worker making $50,000 can add $266,883 to their nest egg if they increase contributions by 1% and retire at 67. A 32-year-old worker making $80,000 could have an extra $189,562 in their retirement fund by age 67 with an extra 1% in annual contributions.

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The cost of increasing contributions may be lower than it appears

It's also important to consider that 401(k) contributions are made with pre-tax dollars. That means you will not feel as much of a difference in your take-home pay.

For example, an employee in the 22% tax bracket who wants to contribute an extra $50/month pre-tax will only see a $39 change in their paychecks. That's because $50 x 0.22 = $11 and $50 - 11 = $39.

New 2026 contribution limits for 401(k)s

In 2026, the IRS increased the maximum employee contribution to $24,500. That means that many workers can save a significant amount towards retirement each year if they're able. Once you turn age 50, you're eligible for catch-up contributions of $8,000 on top of the current maximums, allowing you to invest up to $32,500 a year.

Those aged 60 to 63 can make super catch-up contributions. In addition to the $24,500 maximum, employees in this age bracket can contribute an additional $11,250.

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An updated catch-up contribution policy for high-earners

If you're a high earner making above $150,000 annually, there is a new policy that took effect this year.

Now, if you earn above this amount, all catch-up contributions that you make must be made as Roth contributions, not traditional 401(k) contributions. This is important to know because many people use catch-up contributions to lower their taxable income in addition to increasing their retirement nest eggs.

Take advantage of auto-escalation benefits

Many 401(k) plans offer a feature called auto-escalation, where your contributions increase each year without you having to push a button. It can be helpful for employees to automate this process, especially for those balancing numerous responsibilities, such as owning a home and raising a family.

If you're not sure whether your employer offers auto-escalation as part of your 401(k) plan, contact your human resources department.

401(k) contributions are habits that pay off

Increasing your 401(k) contributions may feel like a sacrifice, especially when living expenses, like groceries and gas, have skyrocketed in price.

However, reframing your 401(k) contributions as a habit that benefits your future self, rather than another expense, can help you make choices that will benefit you more in the long run.

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Where to get 401(k) advice that's worthwhile

Investing in a 401(k) for retirement seems overwhelming for many people. Many employees contribute to 401(k)s with every paycheck without considering a real strategy for generating long-term income in retirement.

If you're not sure whether or not you're on track for retirement, you can consult a financial advisor. A financial advisor will review your 401(k), your investments, your contribution rate, and your goals for retirement. Using that information, they can create a plan for you to help ensure you're able to retire on time with a lifestyle you'll enjoy.

Bottom line

To have a stress-free retirement one day, it's important to increase contributions over time. Fortunately, setting your 401(k) to auto-escalate is a straightforward process, and you may not notice small 1% increments on your paycheck.

As the data shows, a 1% annual increase, especially over a long time horizon, can add significantly to your retirement nest egg. So, it's a strategy that may be worth considering. If you have questions about retirement planning and how much you'll need to maintain your lifestyle in your golden years, ask a financial planner for help.

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