Free Money and the 100% Return
A 401(k) match that pays 100%, if you stay long enough to keep it.
- 401(k)
- employer match
- vesting
- expected value
Sunday, October 11, 2026. Revathi's kitchen, Fairfax, Virginia.
The all-hands lasted eleven minutes. No layoffs. A hiring freeze, a promise that the company had "runway through next summer," and a link to open enrollment, which closes October 31. Marcus in finance sent a single thumbs-up to the whole group chat and nothing else.
Anika forwards the benefits email to Emma with a note: apparently I need to "review my 401(k) elections." Emma answers in four seconds: retirement is so far away lol. i'll do it when i'm 30.
On Sunday, Revathi is assembling a turkey sandwich with mango chutney, the kind of lunch she makes when she wants the conversation to be short. It is not going to be short.
AnikaFirst, a score. The all-hands: no layoffs. I said 30%. You said 40%.
RevathiSo we were both a little wrong in the same direction. Nobody gets a prize. We score properly in January.
The Question
AnikaDo I have to do anything about this 401(k) thing, or is it a future-me problem? Emma says it's a future-her problem.
Revathi's Frame: the only offer in finance that pays you first
RevathiEmma's thirty is a story that ends with the word "later." Let me ask you something else. A stranger says, hand me a dollar and I'll add a dollar of my own, instantly. Do you take it?
AnikaObviously.
RevathiThat's your match. Dollar for dollar, up to 6% of your salary. A hundred percent return the moment it lands. I've worked in markets for twenty-six years and I have never seen anyone offer a guaranteed hundred percent.
AnikaUnless I leave before August. I read the PDF.
RevathiYou read the PDF?
AnikaPage 6. The match "vests" on my first anniversary. August 17th next year. If I leave before then, the company keeps its half. My own contributions stay mine either way.
Revathi(setting down the knife) Then it isn't a guaranteed hundred percent. It's a hundred percent times the chance that you stay. I said "guaranteed" and I shouldn't have.
AnikaI put my odds of staying at 70%.
RevathiYou already wrote the odds. Use them.
RevathiHere is a distinction you will use for the rest of your life. A savings account pays a guaranteed return: the bank promises a rate and the law backs the promise. A match is an expected return: it has a probability attached, and the number you quote is an average over outcomes. You only live one of those outcomes. So you ask two questions. What is the average, and what happens in the version where it goes wrong?
AnikaAnd the version where it goes wrong is I leave early and keep my own money.
RevathiWhich is why this is a good bet and not a gamble. The downside is capped.
The Napkin
Revathi slides a napkin across the yellow table. Assumptions first, all illustrative, so replace them with your own plan's terms.
- Match: dollar for dollar on the first 6% of salary. Salary: $92,000.
- Anika's contribution now: 4%.
- Vesting: the employer's money becomes hers on August 17, 2027. Her own contributions are hers immediately.
- Her odds of staying that long: 70% (her own Ledger entry).
- Taxes: pre-tax contributions, at a combined marginal rate of about 28%. In a Roth plan, take-home falls by the full amount.
RevathiMaximum match: $92,000 × 6% = $5,520. You're capturing 4%, which is $3,680. The gap is $1,840 a year, about $153 a month. That's what you're leaving on the table.
RevathiNow, what does it cost? Putting $153 a month into a pre-tax account lowers your take-home by only about $110, because the tax savings cover the rest. Over a year, call it $1,320 less to spend.
| Raise from 4% to 6% | Chance | Money in your account after one year |
|---|---|---|
| You stay past August 17, 2027 | 70% | $1,840 yours + $1,840 from the employer = $3,680 |
| You leave before it vests | 30% | $1,840 yours, $0 from the employer |
| Expected | $1,840 + (70% × $1,840) = ~$3,128 for ~$1,320 of lost take-home |
RevathiEven in the bad case you've turned $1,320 of spendable money into $1,840 of locked-up money. In the good case you've turned it into $3,680. I'd take that bet at 70%. I'd take it at 50%.
AnikaYou know what's funny? Every one of my friends knows their cliff date the way you know earnings dates. It's why people quit the month after it.
RevathiWhich means your 70% isn't independent of the match. The match changes the odds that you stay. I hadn't priced that.
AnikaI'm trying to tell you that the handcuffs are very visible.
RevathiThen write down the cliff date. It belongs in your decisions.
The Disagreement
AnikaOkay, but I have $24,000 in loans. Shouldn't every extra dollar go there? And locking money away until I'm sixty feels bad.
RevathiThe liquidity point is fair. It's the best objection to a 401(k) there is, and I won't pretend otherwise. Your loans probably cost six or seven percent, and in a few weeks we'll rank them properly. But a match that pays 70 cents on the dollar in expectation beats a guaranteed six or seven.
AnikaUnless something goes wrong and I need the money.
RevathiWhich is why the buffer comes first. You'll hit $1,000 on November 1. You raise the contribution after that, not before.
AnikaSo November 15th. And it comes out of the $300 of slack I get in an average month, not out of the $500 for the buffer.
RevathiThat's cleaner than my plan. Put it in the Ledger.
Monday Move (25 minutes)
- Find the match terms. Look in your benefits portal or the plan's Summary Plan Description. You want two things: the match formula and the vesting schedule.
- Compute the gap. Salary × (match cap − the percent you contribute now) = dollars left on the table each year.
- Write down your cliff date. If you leave before it, you may forfeit the employer's share.
- Schedule the raise. If your buffer isn't at its first $1,000 yet, set a calendar reminder for the day it is. Then raise your contribution to the full match.
Check whether your plan is pre-tax or Roth before you calculate the take-home impact.
The Ledger
Anika scores number six, adds a new entry and shows it to her mother.
| # | Prediction | Anika | Revathi | Resolves |
|---|---|---|---|---|
| 6 | The all-hands announces layoffs | 30% | 40% | Resolved: no |
| 7 | I raise my contribution to 6% | 80% | 65% | Nov 30, 2026 |
RevathiSixty-five. You'll wait for the buffer to be done, and then you'll forget.
AnikaI have a calendar reminder.
RevathiPage 6, you said. Send me that PDF.
AnikaWhy?
RevathiBecause I'd like to see what else you've read that I haven't.
Sunday Odds is a fiction series about money. Revathi and Anika are fictional, and the figures are illustrative. This is education, not personalized financial, tax or legal advice.