Three Strategies Every Investor Should Know, Part 2: Dollar-Cost Averaging

In part one of this series, we covered buy and hold, the strategy of staying invested through market ups and downs rather than trying to predict them. If you missed it, it's worth starting there.

This time, we're looking at dollar-cost averaging, a strategy that answers one of the most common questions new investors ask: how do I know when it’s the right time to buy?

The honest answer is: for the most part, you can't. And that's exactly the point.

So let's look at what you can do instead.

Nobody Knows the Perfect Moment

The whole premise of dollar-cost averaging starts here: timing the market is basically impossible.

Nobody consistently knows whether today is a good day to buy or whether prices will be lower next week. Even professional fund managers get it wrong more often than they'd like to admit.

So instead of chasing the perfect entry point, dollar-cost averaging takes a different approach entirely. It's to get a good average price over time, and to avoid putting all your money in at once, right before a potential drop.

If market swings make you nervous or headlines make you want to pull back, dollar-cost averaging removes a lot of that pressure.

What Dollar-Cost Averaging Means

Dollar-cost averaging, or DCA, simply means investing smaller amounts at regular intervals instead of investing everything at once.

Say you have €1,000 to invest. Rather than putting it all in at once, you might invest €100 a month over ten months. Or you might set up a monthly transfer from your salary and keep going indefinitely. Either way, the principle is the same: smaller amounts, spread over time.

There are no strict rules about how often you invest or how much you put in each time - monthly, quarterly, or whenever works for you. You can keep investing in the same fund every time, or gradually add different investments as your portfolio grows. The flexibility is part of what makes it work in real life.

The most natural way to set it up is to align it with your income. Decide on an amount that feels sustainable each month, choose a fund or ETF you believe in, and set up an automatic transfer. Once it's running, it happens in the background whether or not you're thinking about markets that week.

How It Works

Here's the mechanics of why it works. When prices are high, your fixed contribution buys fewer units. When prices are low, it buys more. Over time, that averages out your entry price across the whole market cycle, rather than landing you at a single point that might turn out to be the top.

Let's make that concrete:

Say you invest €100 a month into a global ETF.

In month one, the price is €20 per share. You buy 5 shares.

In month two, the price rises to €50. You buy 2 shares.

In month three, the price drops to €10. You buy 10 shares.

After three months, you've invested €300 and own 17 shares. Your average price per share is €17.60, meaningfully lower than the month two peak of €50.

If you'd put everything in during month two, you'd have paid that peak price for every single share.

You're not trying to catch the low - you're spreading your exposure across many different moments, which naturally softens the impact of volatility on your overall position.

This also means your portfolio grows gradually and diversifies over time as you add to it.

Rome wasn't built in a day, and neither is a strong investment portfolio. DCA fits the reality that wealth building is an ongoing discipline, not a one-time project.

A Strategy for Anyone Who Finds Markets Stressful

If market swings make you nervous or headlines make you want to pull back, dollar-cost averaging removes a lot of that pressure. You're not making a high-stakes decision every time you invest - you're following a habit.

The question you're asking yourself shifts from "is now a good time?" to "have I invested this month?" That's a much easier question to answer, and a much easier behaviour to sustain over years.

Starting small is completely fine, and for many people the whole point. DCA is designed to build momentum gradually, which means you can begin with whatever amount feels manageable and increase it as your income grows.

But, There Are Trade-offs

Like every strategy, DCA has downsides that you should be aware of.

Because markets tend to go up over time, there's a chance that investing smaller amounts gradually means missing out on gains you'd have captured by investing more upfront. If the market rises quickly while your money is still waiting on the sidelines, you might end up with a lower return than if you'd gone all in earlier.

Transaction fees are also worth checking. If your platform charges per trade, investing very frequently in small amounts can add up over time. Monthly tends to be a practical sweet spot for most people, balancing consistency with cost.

And DCA doesn't decide what you invest in. Putting money regularly into a poor investment doesn't make it a good one. The strategy works best when it's paired with diversified, low-cost funds that give you broad exposure to the market rather than concentrating your risk in one place.

The strategy works best when it's paired with diversified, low-cost funds that give you broad exposure to the market rather than concentrating your risk in one place.

How DCA and Buy and Hold Work Together

Dollar-cost averaging is really just one practical way of implementing buy and hold in everyday life. You're not jumping in and out of the market based on news or feelings; you're building your portfolio steadily and staying invested through different market conditions.

Both strategies rest on the same foundation: trust in the long-term direction of markets, and the discipline to stay the course when things get bumpy. DCA just gives that discipline a structure, a regular habit you can follow without needing to make a fresh judgment call each time.

As your income grows, continuing to invest regularly is part of treating your finances as something you tend to over time, not a box you tick once and forget.

Is Dollar-Cost Averaging Right for You?

DCA tends to suit people with a lower risk tolerance, those who find market headlines stressful, or anyone who would rather follow a simple monthly habit than face one big, high-pressure decision.

It works well if you want to start with smaller amounts and build gradually, and it fits naturally into a busy life because once it's automated, it requires very little ongoing attention.

If any of that sounds like you, DCA is worth considering.

The takeaway is simple: dollar-cost averaging is less about beating the market and more about giving yourself a realistic, repeatable way to participate in it. If you invest consistently and are properly diversified, over the long run that’s usually more than enough.

In part three, we'll look at the core-satellite strategy, which builds on everything covered in this series and gives you a framework for how to structure your portfolio once you're ready to go a little deeper.