How Much Should I Contribute to My 401(k)?

Start With Your Own Numbers

Before anything else, plug your actual salary, age, and current savings into our free 401(k) Calculator. The calculator shows you exactly how much you will have at retirement at your current rate — and what happens if you bump it up by just 1%, 2%, or 5%. Numbers on a screen are far more motivating than a rule of thumb.

The Starting Rule — and Why It Is Just a Starting Point

The most widely cited guidance is to save 10–15% of your gross income for retirement, including any employer match. That is a solid target for someone who starts in their mid-to-late 20s and wants a comfortable retirement in their mid-60s.

But 10–15% covers a huge range. Whether you sit closer to 10% or 20% depends on four things: how old you are right now, how much you have already saved, what kind of retirement you want, and how soon you want to retire. The right answer for a 25-year-old starting from zero is very different from the right answer for a 45-year-old who has been saving nothing.

The Employer Match: This Should Always Come First

If your employer offers a 401(k) match, your first priority is to contribute enough to capture every dollar of it. This is the highest guaranteed return available to most working people, and passing it up is one of the most costly financial mistakes you can make.

Here is how a typical match works: your employer matches 100% of your contributions up to 6% of your salary. If you earn $70,000 and contribute 6%, that is $4,200 from you — and $4,200 free from your employer. If you only contribute 3%, you get $2,100 from them and leave $2,100 sitting on the table every single year.

Contribution Rate by Age — A Practical Guide

Age is the most important variable in figuring out your contribution rate. The earlier you start, the less you need to save each month because compounding does the heavy lifting over a longer timeframe. Here is a rough guide by decade:

These are general benchmarks, not personalised financial advice. Your situation may differ based on debt, other savings, and retirement goals.

What Different Rates Look Like in Real Dollars

Let us take a concrete example. You are 30 years old, earning $65,000 a year, with $8,000 already saved. Your employer matches 100% up to 5%. Here is what different contribution rates produce by age 65, assuming a 7% average annual return:

*Based on the 4% safe withdrawal rule. Projections assume a consistent 7% annual return and do not account for salary increases or inflation. Use the calculator for personalised results.

Notice the difference between contributing 3% — missing part of the employer match — versus 5%, which captures the full match. That gap alone is over $290,000 by retirement from employer money you were leaving behind. And getting from 5% to 15% adds roughly another $648,000 over 35 years.

2025 IRS Contribution Limits You Should Know

The IRS sets annual caps on how much you can put into a 401(k). For 2025, these are the limits:

Limits are set by the IRS and may change annually. The SECURE 2.0 Act introduced the age 60–63 super catch-up starting in 2025.

Most people earning average salaries will not bump into the $23,500 employee cap. But if you are a higher earner and can afford to maximise your contributions, doing so is almost always the right financial move — you are sheltering more income from taxes and building your nest egg faster.

What If You Started Late?

If you are in your 40s or 50s and feel behind, the answer is not to panic — it is to act, and to act aggressively. The gap is closable in most cases, but you need every tool available.

• Use catch-up contributions. From age 50 you can contribute $7,500 extra per year. From age 60–63 that rises to $11,250 extra. Use every dollar of it.
• Reduce your spending. A leaner lifestyle now means the retirement income you will have stretches further later.
• Consider working two to three years longer. This does three things at once: more contributions, more growth, and fewer years of withdrawals needed.
• Never take early withdrawals. Pulling money from your 401(k) before age 59½ triggers a 10% penalty on top of income tax. It is one of the most damaging things you can do to long-term savings.
• Delay Social Security if possible. Each year you wait between age 62 and 70 increases your monthly Social Security benefit by roughly 6–8%. If your 401(k) can bridge the gap, waiting pays off significantly.

The Smartest Way to Increase Your Rate: The 1% Trick

The most common reason people do not contribute more to their 401(k) is that they feel they cannot afford to. For some, that is genuinely true. But for many, the issue is that a 5% jump feels painful so they never make it at all.

The better approach is to increase by 1% at a time — ideally tied to a pay rise so you never feel the pinch. If you get a 3% raise this year, bump your 401(k) by 1%. Your take-home pay still goes up; you just capture part of the raise for future you. Repeat every year for five years and you have added 5 percentage points to your rate without ever noticeably tightening your budget.

Many 401(k) plans now offer an auto-escalation feature that does exactly this automatically — check if yours does and switch it on if it does.

The Bottom Line

There is no single magic percentage that works for everyone. But there are clear principles that do: always capture the full employer match first, aim for a total contribution rate of at least 15%, increase by 1% per year whenever possible, and use the calculator to see exactly what your numbers look like.

The difference between contributing 6% and 15% over a 30-year career is often several hundred thousand dollars — and that difference is entirely within your control. Stop guessing. Plug your real numbers into the 401(k) Calculator and see exactly where you stand today, and what one or two small changes could do for your future.