Dividend Reinvestment Calculator (DRIP)

A dividend reinvestment plan (DRIP) is the mechanism by which dividends are automatically used to purchase additional shares rather than paid out as cash. It is one of the simplest and most powerful compounding strategies available to individual investors — and most brokerages offer it free of charge.

The compounding effect of DRIP is distinct from regular compound interest: with DRIP, dividends buy real shares, which then generate their own dividends, which buy more shares. This share accumulation accelerates as time passes. The S&P 500 backtest above defaults to the 10% total return rate, which includes reinvested dividends — try "Started 10y earlier" to see how early DRIP enrollment stacks up.

How DRIP works mechanically

When a company pays a dividend (typically quarterly), your brokerage automatically uses that cash to buy additional shares of the same stock at the current market price. Modern DRIPs can purchase fractional shares, so every dollar of dividends goes to work immediately. There is no minimum transaction size, no brokerage fee (in most cases), and no manual action required.

For index funds and ETFs, the process is similar: dividend distributions are reinvested by purchasing additional fund shares. DRIP is especially valuable during market downturns — when a stock's price is down 30%, each quarterly dividend buys 43% more shares than it would have at the original price. Those cheap shares then benefit fully from the eventual recovery.

DRIP vs. dividend income: a side-by-side

Suppose you hold $10,000 of a dividend stock yielding 3% annually at 7% price appreciation. After 20 years, taking dividends as cash: your stock is worth about $38,697 at 7% CAGR, plus you received $3,000/year × 20 = $60,000 in dividends (spent, not compounded). Total outcome: $98,697.

With DRIP over the same period: total return including reinvested dividends at 10% (7% price + 3% dividend yield reinvested) = approximately $67,275. But crucially, your compounding base grew continuously, so a more accurate DRIP projection (using 10% total return) gives $67,275 of total portfolio value — and the dividends kept compounding throughout. This simplification shows DRIP is not always "more money" in 20 years if you spend those dividends on necessities, but it is more wealth compounding if the alternative is spending.

Tax treatment of DRIP shares

In taxable accounts, DRIP shares have the same tax treatment as manually purchased shares, with one complication: each quarterly reinvestment creates a new tax lot with its own cost basis and holding period. After 20 years of quarterly DRIP, you may have 80 separate tax lots to track when selling. This is why many long-term dividend investors hold DRIP positions in tax-advantaged accounts (IRAs, 401k) where dividends are not taxable events.

Qualified dividends reinvested via DRIP are still taxable in the year received, even though you never saw the cash. The tax is owed in the year of reinvestment, which can create cash flow issues for taxable investors. This is a significant reason to hold high-yielding DRIP positions in Roth or Traditional IRA accounts.

Frequently asked questions