What Is Dollar-Cost Averaging? A Plain-English Guide

Dollar-cost averaging means investing your money in equal portions, at regular intervals, regardless of the ups and downs in the market. It is less a trick than a habit: the same amount, on a schedule, over a long period.

How does it work?

Because you invest the same dollar amount each time, you automatically buy more of an investment when its price is low and less when its price is high. Say you invest $100 a month: in a month when a fund costs $50 a share you buy two shares, and in a month when it costs $25 you buy four. Over time, that consistent pattern can smooth out the price you pay.

Why do people use it?

It removes the impossible job of timing the market, and it turns investing into a routine rather than a series of stressful decisions. For money that arrives in a lump, like celebration gifts, some people choose to invest it gradually this way instead of all at once.

What does it not do?

It does not remove risk. Prices can fall and stay down, and you can lose money, including the original amount, whatever schedule you follow. It is a way to manage risk through consistency, not a guarantee of profit.

The short version

Invest equal amounts on a regular schedule, buy more when prices are low, and accept that markets will still do what markets do.

Frequently asked questions

Is dollar-cost averaging better than investing all at once? It depends on the market's path and your temperament. Averaging trades some potential upside for a calmer, more consistent process.

How often should the intervals be? Monthly is common, but the schedule matters less than sticking to it.

Sources and further reading: Investor.gov, "Dollar Cost Averaging" (https://www.investor.gov/introduction-investing/investing-basics/glossary/dollar-cost-averaging); Investor.gov, "Index Fund" (https://www.investor.gov/introduction-investing/investing-basics/glossary/index-fund).