4 Retirement Account Contribution Mistakes to Avoid
Contributing to a $\text{401(k)}$ or an $\text{IRA}$ is the most powerful tool for building wealth, thanks to tax advantages and compounding. However, small mistakes in contribution strategy can cost you tens of thousands of dollars over a lifetime. Don't leave money on the table. Here are the four most common and costly retirement contribution mistakes U.S. investors make, and how to fix them.
Mistake 1: Failing to Get the Full Employer Match
This is arguably the most costly mistake, often referred to as "turning down free money."
The Mistake
Contributing less than the percentage required to receive your full $\text{401(k)}$ employer match. Typical matches are $\text{50\%}$ of your contribution up to $\text{6\%}$ of your salary, or a dollar-for-dollar match up to $\text{3\%}$.
The Fix: The $\text{100\%}$ Return
Immediately increase your contribution rate to at least the minimum percentage needed to capture the entire match. If your employer matches up to $\text{5\%}$, you must contribute $\mathbf{5\%}$. This employer match is an instant, $\text{100\%}$ return on that portion of your investment, a rate you will never find anywhere else.
If you have high-interest debt, like the kind we discuss in Budgeting for a High-Debt Holiday Season, the employer match should still be your **first financial priority** before debt payoff (except for payday loans).
Mistake 2: Choosing the Wrong Tax Strategy (Roth vs. Traditional)
Deciding between a Roth or Traditional account is a crucial tax decision that affects your income decades from now.
The Mistake
Automatically choosing the **Traditional** option when you are currently in a **low tax bracket** (e.g., early career, starting a low-income side hustle) or choosing **Roth** when you are in your highest earning years.
The Fix: Project Your Tax Bracket
The rule of thumb is:
**If you expect your tax rate to be higher in retirement, choose ROTH (pay tax now, withdraw tax-free later).**
**If you expect your tax rate to be lower in retirement, choose TRADITIONAL (get a tax deduction now, pay tax later).**
Most young investors benefit from $\text{Roth}$ contributions because they are typically in lower tax brackets now than they will be during peak earning years and retirement.
Mistake 3: Failing to Max Out Catch-Up Contributions
The ability to make higher contributions after age $\text{50}$ is an invaluable, often-missed opportunity to turbocharge retirement savings.
The Mistake
Retirement savers aged $\text{50}$ or older do not utilize the additional **catch-up contribution limits** allowed by the $\text{IRS}$ for $\text{401(k)}$s and $\text{IRAs}$. (Note: The exact limits change annually, but the opportunity remains.)
The Fix: Calculate the Extra Capacity
If you are $\text{50}$ or over, check the current year’s $\text{IRS}$ limits for catch-up contributions. This extra allowance allows you to contribute thousands more annually to tax-advantaged accounts, significantly reducing your taxable income in your peak earning years. This is especially vital if you started saving later in life or had career gaps.
Mistake 4: Missing the Annual $\text{IRA}$ Deadline
The deadline for $\text{IRA}$ contributions is treated differently than $\text{401(k)}$ contributions, which are deducted with each paycheck.
The Mistake
Believing the deadline for $\text{IRA}$ contributions aligns with the calendar year (December $\text{31}^{\text{st}}$). This leads people to miss the chance to contribute for the **previous tax year**.
The Fix: The April Tax Deadline Rule
The deadline to contribute to an $\text{IRA}$ for the previous tax year is typically the **April $\text{15}^{\text{th}}$ tax filing deadline** (or the next business day). For example, you can contribute to your $\text{2025}$ $\text{IRA}$ from January $\text{1, 2025}$ until April $\text{15, 2026}$.
Always check with your brokerage to ensure your contribution is correctly designated for the intended tax year.
Retirement account rules are designed to incentivize savings. By avoiding these four common pitfalls, you ensure you are leveraging every tax and matching opportunity available to build a robust financial future.
Download our free $\text{2025}$ Tax Bracket Retirement Calculator to help project your optimal strategy.
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