Vanguard Says a Common Money Mistake is Costing Some Americans up to $120,000 in Retirement Savings

Many people assume they're making the responsible choice when they put extra money towards paying off debt. But according to new research from Vanguard, paying down low-interest debt while failing to capture a full employer 401(k) may be giving up one of the most vulnerable benefits available in the workplace.

If you're trying to figure out whether you're on track for retirement, this is one financial tradeoff worth taking a closer look at. Here's why Vanguard says this mistake could cost some Americans far more than they realize.

Vanguard found many workers are missing out on free retirement money

Employer 401(k) matches are often described as free money, but millions of workers still fail to take full advantage of them. Vanguard's research found that employees who focus on paying off low-interest debt before securing their full employer match miss out on roughly $1,100 per year on average.

That might not sound like a lot, but retirement investing works over decades, not months. Every missed contribution is money that never gets a chance to grow through investment returns and compound earnings.

For workers who repeat this mistake year after year, the long-term impact can be significant.

Small annual shortfalls can turn into big gaps

One of the most important findings from Vanguard's analysis is how quickly missed matches add up. Workers who consistently skip employer matching contributions could end up with approximately $120,000 less in retirement savings after 10 years compared to someone who captures the full match and remains invested.

The difference isn't simply the missed employer contribution. It's also the decades of growth those dollars could have generated.

The mistake is especially common among aggressive debt payers

Many people don't realize they're making this mistake. In fact, they're often doing what sounds financially responsible: paying extra toward student loans or mortgages whenever possible.

Vanguard found that some workers become so focused on eliminating debt that they reduce or pause contributions altogether. While this approach may lower their debt balance faster, it can also mean walking away from employer contributions that would have boosted their retirement savings.

In many cases, the math simply doesn't favor giving up a guaranteed employer match to pay down debt carrying low interest rates.

Why low-interest debt changes the equation

Not all debt should be treated the same way. A credit card charging 24% interest poses a very different financial challenge than a mortgage with a 3% interest rate or a student loan with a 4% interest rate.

When workers redirect retirement contributions toward low-interest debt, they may be saving a relatively small amount in interest while sacrificing matching dollars from their employer. That doesn't mean low-interest debt should be ignored. It just means that capturing an employer match first often provides the larger financial benefit.

A simple rule of thumb

Here's a straightforward framework for deciding where extra dollars should go. Debts with interest rates of about 20% (like credit cards) should be prioritized. The interest costs are so high that paying them down quickly makes sense.

Low-interest obligations are different, though. Debts carrying rates below roughly 4% typically should not take priority over a full employer match available through a workplace retirement plan. That doesn't mean everyone should make this decision. But this guideline does provide a practical starting point when deciding how to balance debt repayments and retirement savings.

How to tell if you're leaving money on the table

Many employees aren't entirely sure whether they're receiving their full match. A quick review of your benefits package or 401(k) plan documents can provide the answer. Common matching formulas include:

• 100% of the first 3% of pay contributed
• 50% of the first 6% of pay contributed
• Tiered matching structures based on your contribution levels

If your employer matches up to a certain percentage and you're contributing less than that amount, you could be missing out on additional retirement dollars.

What workers should do next

If you're carrying multiple forms of debt, it may help to prioritize them by interest rate rather than trying to eliminate everything at once.

Consider a sequence like this:

• Pay off high-interest credit card debt
• Capture the full employer 401(k) match
• Build an emergency fund
• Increase retirement contributions
• Accelerate repayment of lower-interest debt

That exact order will vary depending on your specific situation, but the broader principle remains the same: avoid giving up vulnerable employer-matching contributions to pay off low-interest debt.

Bottom line

Many workers focus so heavily on becoming debt-free that they overlook one of the easiest opportunities to build wealth: capturing their full employer 401(k) match. Vanguard's research suggests that skipping those matching dollars while aggressively paying down low-interest debt could result in a significantly smaller retirement nest egg years down the road.

An employer match offers an immediate return on your contribution that most financial moves cannot match. Before sending extra money toward a mortgage or student loan with a relatively low interest rate, review your workplace retirement benefits. It could be one of those surprising financial mistakes that costs more than you'd expect.