You Want to Dollar-Cost Average. What's the Optimal Schedule?

You have decided to dollar-cost average — either from regular income (paycheck investing) or from a lump sum you want to spread out. The question is: how often? Weekly? Biweekly? Monthly? And over how long?

The answer is simpler than the internet makes it.

For regular income (paycheck investing): Match your pay frequency. If paid biweekly, invest biweekly. If paid monthly, invest monthly. Set up automatic transfers on the day after your paycheck hits. Automation removes the decision from each pay period — and decisions are where people fail.

The difference between weekly and monthly DCA over 20+ years is negligible — less than 0.1% in annualized returns. Choose whichever is easiest to automate and forget about it.

For a lump sum you want to DCA: Spread over 3-6 months maximum. Longer than 6 months and you are statistically hurting yourself — markets go up more than down, so the faster you are fully invested, the more growth you capture.

Example: $60,000 lump sum. Invest $10,000 on the 1st of each month for 6 months. Set it up as 6 scheduled transfers and do not look at the market between them.

The critical rules: - Automate everything. Manual investing leads to skipped months, market-timing temptation, and analysis paralysis. - Never adjust the amount based on market conditions. DCA works because you buy at all prices — both high and low. - Dollar amount stays fixed. Do not invest more when the market is down or less when it is up. That is market timing, not DCA.

See how DCA builds wealth over time.