Dollar-Cost Averaging

What is dollar-cost averaging?

Dollar-cost averaging is investing the same dollar amount on a regular schedule, such as every payday, regardless of what the market is doing. Because the amount stays fixed, it buys more shares when prices are low and fewer when prices are high. It replaces the question "is now a good time?" with a routine that runs on its own.

Key takeaways

• You invest a fixed amount at fixed intervals, whatever the price.
• Lower prices mean your money buys more shares. Higher prices mean fewer.
• It takes emotion and market timing out of the decision.
• Contributing to a 401(k) from every paycheck is already dollar-cost averaging.

How dollar-cost averaging works

You pick an amount, a schedule, and an investment, usually a broad fund. Then you set it to happen automatically. Many brokerages and retirement plans let you do this in a few clicks.

Here is a hypothetical example with round numbers. You invest $100 on the first of each month for four months into a fund whose share price moves around:

Month	Share price	Shares bought with $100
1	$20	5
2	$10	10
3	$25	4
4	$20	5

You invested $400 and bought 24 shares. Your average cost per share is $400 divided by 24, or about $16.67. The average of the four prices was $18.75. You paid less than that average because your fixed $100 automatically bought more shares in the cheap month.

This does not mean dollar-cost averaging guarantees a profit or protects you if prices keep falling. It is a method for buying steadily, not a way to beat the market. If you have a large lump sum, investing it all at once is another option, and the right choice depends on your situation and how you would feel watching it drop the next month.

To see how a steady monthly amount could grow over time, try the compound interest calculator or the retirement calculator.

Why it matters for your Money Type

The Scrambler Money Type describes someone whose money has no default order for what happens first. Payday arrives, everything asks at once, and the decisions get made from scratch based on whatever feels most urgent.

Dollar-cost averaging fits that pattern because it is one decision made once. But order matters. The Scrambler First Fix is Bills First: on payday, pay the bills before anything else, every time. Once bills are handled reliably, a small fixed investment scheduled right after them turns investing into part of the same payday order instead of one more thing competing for attention. Start small enough that it never collides with a bill. If income is irregular, a smaller amount that always happens beats a larger one that gets skipped.

A Saver gets a different benefit: it ends the wait for a perfect moment to invest. Find your type with the Money Type quiz.

Common questions

Is dollar-cost averaging a good strategy?

It is a practical way to invest regularly without trying to guess the market, which is why it is the default in workplace retirement plans. It does not guarantee gains or prevent losses.

How often should I dollar-cost average?

Matching your pay schedule is the simplest option, whether that is weekly, every two weeks, or monthly. The consistency matters more than the exact interval.

Should I keep investing when the market drops?

That is when a fixed amount buys the most shares, so many long-term investors keep going through market drops. Stop only if you need the money for bills or your emergency fund.

What is the difference between dollar-cost averaging and lump-sum investing?

Lump-sum investing puts all available money in at once. Dollar-cost averaging spreads it over time. For money that arrives with each paycheck, dollar-cost averaging is simply how investing happens.