How DRIP compounding actually works

A DRIP — dividend reinvestment plan — takes every dividend a stock pays you and immediately buys more shares with it, automatically, usually commission-free. It is the most boring wealth machine ever invented, which is exactly why it works: nobody panic-sells a process they forgot was running.

The mechanics in one example

Own 100 shares of a $50 stock paying a 4% dividend. Year one, your $200 of dividends buys about 4 more shares. Next year, 104 shares generate dividends, which buy more shares, which generate more dividends. Each turn of the wheel is small; the wheel turning on itself for twenty years is the whole game. A DRIP does not change the math of compounding — it removes the human who would otherwise interrupt it.

What people miss

1. Synthetic vs. true DRIPs. Most brokers run synthetic DRIPs — whole shares only, leftover cash idle. Transfer-agent DRIPs can buy fractional shares, sometimes at a small discount: more efficient, more paperwork.
2. Taxes still happen. In a non-registered account, reinvested dividends are taxed as if paid in cash, and every reinvestment changes your adjusted cost base. Inside a TFSA or RRSP none of that friction exists — DRIPs and registered accounts are natural partners.
3. A DRIP is not a strategy. Reinvesting into a declining business compounds the decline. The plan automates the buying, not the judgment.

Through the operator's lens, a DRIP earns its keep on a business with durable, growing free cash flow and a dividend covered several times over — reinvesting there is a bet on more of the same. Run one on a cyclical payer or a dividend funded by debt, and the DRIP just automates buying a bigger stake in a shrinking business, faster.

Want to feel the math instead of reading it? Put a dividend payer into the Time Machine — then remember its results exclude dividends. The gap between what it shows and a DRIP's true 20-year return is the entire point of this article.

Try the math on your own numbers with the Dividend Income & DRIP Calculator — reinvesting versus taking the cash, side by side.

Opinion and personal record, not investment advice.