One of the most paralysing questions in investing is “when should I invest?” Markets feel expensive. A crash might be coming. This analysis paralysis keeps money on the sidelines for months — costing far more than any poorly timed entry ever would.

Dollar-Cost Averaging eliminates this problem by removing the decision from the equation.

The problem with timing

Nobody can reliably predict short-term market movements. Decades of evidence confirm that market timing fails more often than it succeeds.

The problem is asymmetric: missing the best days hurts more than avoiding the worst days helps. If you missed the 10 best days over 20 years, your return drops by roughly half. Those best days often occur during maximum pessimism — exactly when timers sit in cash.

How DCA works

Invest a fixed amount at regular intervals, regardless of market price.

  • Market up? You buy fewer shares at a higher price.
  • Market down? You buy more shares at a lower price.
  • Market sideways? You buy steadily.

Over time, this averages your purchase price. You’ll never buy entirely at the bottom, but you’ll never buy entirely at the top either.

Implementation: set up an automatic monthly transfer to your investment platform, configured to buy your chosen funds on a specific date. Once set up, zero ongoing decisions required.

The psychological benefit

DCA’s greatest advantage is psychological:

No decision fatigue. The system decides: invest the fixed amount, every month, no exceptions.

No regret. You’re investing at every moment — some months better, some worse, the average is what matters.

Crash-proof behaviour. When markets fall 30%, DCA automatically buys more at lower prices. Without it, most people freeze or sell. With it, crashes become opportunities.

Habit building. Money leaves your account before you can spend it. Compounding starts from month one.

DCA vs. lump sum

If you have a large sum to invest immediately, evidence slightly favours investing all at once (markets go up more often than down). But if lump-sum investing would cause anxiety leading to panic selling, spreading over 6-12 months is the better choice — because the best strategy is the one you’ll stick with.

For regular salary income, DCA is the natural approach. Invest each month as soon as you can and get on with your life.

DCA isn’t the theoretically optimal strategy in all cases. It’s something better: the strategy that works reliably for real humans with real emotions. Set it up once, and the hardest part of investing — consistently showing up — happens automatically.