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How Much Should You Put in Your 401(k)? A Ladder, Not a Number

The right contribution is not a universal percentage but a sequence: match first, then high-interest debt, then tax-advantaged space as income allows. The ladder, the 15% benchmark, and what to do when you cannot do it all.

Published · Saving & Investing · 2 min read

"How much should I contribute?" usually gets answered with a single number — 10%, 15%, "the max" — and single numbers fit almost nobody. The useful answer is a ladder: a sequence of rungs, each funded before the next, that adapts itself to any income and any stage.

The ladder

  • Rung 1: the full employer match. Whatever percentage captures every matching dollar — an instant 50–100% return that outranks everything, including most debt payoff.
  • Rung 2: high-interest debt and a starter emergency fund. A 24% card balance outearns any market projection; a month or two of expenses in cash keeps the plan from unraveling at the first surprise.
  • Rung 3: a Roth IRA — for the flexibility stack and open fund menu.
  • Rung 4: back to the 401(k), raising the percentage toward the annual limit as income allows.
  • Rung 5: HSA (if eligible) and taxable investing beyond that.

The 15% benchmark, contextualized

The common advice to save 15% of gross income for retirement (employer match included) is a reasonable middle: roughly what a saver starting in their mid-twenties needs, at historical returns, to replace a comfortable share of income by their sixties. Start at 35 and the benchmark climbs toward 20%+; start at 45 and it climbs steeply again — the cost of waiting in benchmark form. The savings rate math generalizes all of this: the rate is the dial, and 15% is just one setting.

When you cannot do it all

Contribute something — even 1% — and automate an annual 1-point increase (many plans do this natively). The trajectory matters more than the starting point: a 4% saver adding a point a year passes the static 10% saver within a decade, and never felt a single painful jump. Every raise is a chance to move two points without touching current lifestyle.

The 401(k) calculator projects any contribution path to retirement — including the match and annual increases — and the retirement calculator tests whether the resulting balance funds the retirement you actually mean to have. Set the ladder, automate the escalator, and revisit annually.

Run your own numbers

401(k) Calculator Project a 401(k) to retirement against the 2026 contribution limits, split between your money, the employer match, and growth. Savings 401(k) Employer Match Calculator Work out what your employer will match, what it takes to capture all of it, and what leaving some on the table costs by retirement. Savings Retirement Calculator Project savings to retirement, the income they support, and whether the money lasts — with the withdrawal years modelled year by year. Savings

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This article is general education, not tax, legal, investment, or financial advice. Figures used in examples are illustrations, not quotes or predictions. For decisions that depend on your full situation, talk to a qualified professional.