What Is Front-Loading?

Front-loading means contributing a high percentage of your paycheck to your 401k early in the year so you hit the $24,500.00 elective deferral limit well before December. Some people do this intentionally to get their money invested sooner. Others do it accidentally by setting a percentage that's higher than they need for even contributions.

At first glance, front-loading sounds smart. Your money gets more time in the market. But there's a catch that can cost you thousands of dollars: employer match loss.

How Employer Match Works Per Paycheck

Most employers calculate your 401k match on a per-paycheck basis, not annually. A typical match formula looks like this: "We match 50% of your contributions, up to 6% of your gross pay."

Here's what that means in practice. Each paycheck, your employer looks at:

1. How much you contributed from that paycheck
2. What 6% of your gross pay is for that paycheck
3. They match 50% of your contribution, capped at the 6% threshold

The critical detail: if your elective contributions hit the $24,500.00 limit and stop, your employer stops matching too. They don't look at the full year and make up the difference. For the remaining paychecks, your match is zero.

Let's Walk Through an Example

Let's walk through a real scenario to see how much money you can leave on the table.

Scenario A: Even Contributions

You set your contribution rate to about 12.24%, contributing roughly $942.31 per paycheck. This spreads your $24,500.00 evenly across all 26 paychecks. Since $942.31 exceeds 6% of gross ($461.54), you get the full match every single paycheck.

Scenario B: Front-Loaded at 40%

You set your contribution rate to 40%, contributing $3,076.92 per paycheck. You hit the $24,500.00 limit after just 8 paychecks. For the remaining 18 paychecks, your contributions are zero, and your employer match is also zero.

The Match Difference

By front-loading, you gave up over $4,000.00 in free money from your employer. That's a significant cost for getting your contributions invested a few months earlier.

What Is a True-Up Provision?

A true-up is a year-end reconciliation that some employers offer. At the end of the year, your employer compares the total match you received with what you would have received if your contributions had been spread evenly. If there's a shortfall, they deposit the difference.

With a true-up, front-loading is safe. You get your money invested early, and your employer makes you whole at year-end. Using the example above, the employer would deposit an additional $4,153.86 as a true-up in late December or early January.

How to Check If Your Employer Offers True-Up

This information is not always easy to find. Here are the best places to look:

1. Summary Plan Description (SPD). Search for "true-up," "true up," or "year-end reconciliation." This is the official plan document your employer is required to provide.
2. Your 401k provider's website. Some providers (Fidelity, Vanguard, Schwab) mention it in the plan details section.
3. HR or benefits team. Ask directly: "Does our 401k plan include a true-up or year-end match reconciliation?"
4. Open enrollment materials. Some employers mention the true-up in their benefits overview documents.

If you cannot find a clear answer, assume your plan does not offer true-up and pace your contributions accordingly.

How to Pace Contributions Without True-Up

If your employer does not offer a true-up, you need to make sure your elective contributions last through your final paycheck of the year. There are two approaches.

Option 1: Even Percentage All Year

Divide $24,500.00 by your total gross pay for the year. For a $200,000.00 salary with 26 biweekly paychecks, that's about 12.25%. Set this as your contribution rate and leave it alone. Simple, but it requires that you know your income upfront and don't have mid-year changes.

Option 2: Contribution Phases

If you want to contribute more early in the year (for example, to front-load Roth contributions while still preserving your match), you can use contribution phases. Set a higher percentage for the first few months, then reduce it so the remaining limit is spread evenly across later paychecks.

For example, with a $200,000.00 salary on biweekly pay:

In this setup, you contribute more aggressively in the first half of the year, but never so much that your contributions stop before December. You get the best of both worlds: faster investing and full match. The calculator's phase editor makes this easy to model.

Front-Loading and the Mega Backdoor Roth

If you're running a mega backdoor Roth strategy, front-loading your elective contributions is especially tempting. The faster you fill the $24,500.00 elective bucket, the sooner you can redirect your contribution percentage to after-tax contributions and start filling the $72,000.00 415(c) bucket.

But the same match loss problem applies. Without a true-up, you need to balance speed with match preservation. One common approach: set a moderately elevated elective rate (enough to finish by September or October), combined with after-tax contributions running in parallel. This gives you most of the time-in-market benefit without sacrificing your full match.

Contribution Types and Match Eligibility

Not all contribution types count toward your employer match. Understanding the difference between pre-tax, Roth, and after-tax contributions matters here. Most employer match formulas only apply to elective deferrals (pre-tax and Roth). After-tax contributions typically do not trigger a match, though some plans are exceptions.

Check your plan documents to confirm which contribution types your employer matches. Some plans match only pre-tax, some match pre-tax and Roth, and a few match all three types.

What to Remember

1. Employer match is calculated per paycheck. If your contributions stop mid-year, so does your match.
2. True-up fixes this. If your employer offers it, you can safely front-load without worrying about match loss.
3. No true-up? Pace your contributions. Spread your elective deferrals so they last through your final paycheck.
4. Contribution phases give you flexibility. You can front-load partially while still preserving your full match.
5. Model it before you commit. The difference between getting this right and wrong can be thousands of dollars per year.

Run Your Numbers

The right contribution strategy depends on your salary, pay frequency, match formula, and whether you have a true-up. Run the Numbers models your contributions paycheck by paycheck and warns you when front-loading causes match loss. Set up your job, toggle true-up on or off, and see exactly how much match you'd receive under different contribution schedules.