The Free Money Most People Walk Past
If your employer offers a 401(k) match and you contribute below the match limit, you're saying no to free money. There's no other interpretation. It's part of your compensation package — declining it is the same as declining a raise.
Here's the brutal math.
What an Employer Match Actually Is
The most common structure is something like "50% match on contributions up to 6% of salary." Translated:
If you contribute only 3%, your employer adds 1.5%. If you contribute 0%, employer adds nothing. The match is conditional on what you put in.
A Real Example
Let's say you earn $75,000/year with a 50%-up-to-6% match.
| Your contribution % | Your $ | Employer $ | Total going in |
|---|---|---|---|
| 0% | $0 | $0 | $0 |
| 3% | $2,250 | $1,125 | $3,375 |
| 6% | $4,500 | $2,250 | $6,750 |
| 10% | $7,500 | $2,250 | $9,750 |
Notice the 6% line. After that point, the employer match doesn't grow no matter how much more you contribute. You can put in 15% if you want — the employer still tops out at 3%.
So the 6% line is the floor. Anything below it is leaving money behind.
The Long-Term Cost
That $2,250/year of employer money you're skipping isn't just $2,250. It's $2,250 plus 30 years of compound growth on top.
Using our Compound Interest Calculator at a realistic 7% annual return:
Two hundred twenty-seven thousand dollars. From contributions you didn't make. By retirement age.
The Vesting Catch
There's one wrinkle: many employers require you to stay a few years before the match becomes fully yours. This is called vesting.
Common vesting schedules:
If you might leave before fully vested, math changes. But even partially vested matches usually beat zero.
How to Set This Up Today
What About Roth vs Traditional?
This is the secondary question. The match itself goes into a Traditional bucket regardless of which type you contribute to. So:
Roth tends to win for younger workers expecting to be in higher tax brackets later. Traditional wins if you expect to be in a lower bracket in retirement, or if the deduction now is critical to your budget. Many plans let you split — that's also fine.
What If My Employer Doesn't Match?
About a third of US workers don't have access to an employer match. If you're one of them:
The Bottom Line
If your employer offers a 401(k) match, contribute at least up to the limit. Every paycheck. Forever. It's the highest guaranteed return you'll ever get on any investment, and refusing it costs more than most people realize.
Run your numbers with our 401(k) Calculator and our Compound Interest Calculator — see exactly what you're choosing between.