Dividend Reinvestment (DRIP) Calculator Formula

Understand the math behind the dividend reinvestment (drip) calculator. Each variable explained with a worked example.

Use the Dividend Reinvestment (DRIP) Calculator

Formulas Used

With DRIP (Reinvested)

with_drip = initial_investment * pow(1 + total_return, years)

Without DRIP (Price Only)

without_drip = initial_investment * pow(1 + price_growth / 100, years)

DRIP Advantage

drip_advantage = initial_investment * pow(1 + total_return, years) - initial_investment * pow(1 + price_growth / 100, years)

Cumulative Dividends Earned

total_dividends = initial_investment * pow(1 + total_return, years) - initial_investment * pow(1 + price_growth / 100, years)

Variables

VariableDescriptionDefault
initial_investmentInitial Investment(USD)10000
dividend_yieldAnnual Dividend Yield(%)3
price_growthAnnual Price Growth(%)5
yearsInvestment Period(years)20
total_returnDerived value= (dividend_yield + price_growth) / 100calculated

How It Works

Dividend Reinvestment Plans (DRIP)

A DRIP automatically uses dividend payments to purchase additional shares, creating a compounding effect.

How Compounding Amplifies Returns

  • Without DRIP: Growth from price appreciation only
  • With DRIP: Growth from price appreciation PLUS reinvested dividends buying more shares, which themselves generate more dividends

    • Formula

    With DRIP = Investment x (1 + Yield + Growth)^Years

    Without DRIP = Investment x (1 + Growth)^Years

    The difference widens dramatically over longer time periods.

    Worked Example

    $10,000 invested in a stock with 3% dividend yield and 5% price growth for 20 years.

    initial_investment = 10000dividend_yield = 3price_growth = 5years = 20
    1. 01Total return with DRIP = 3% + 5% = 8%
    2. 02With DRIP: $10,000 x (1.08)^20 = $46,610
    3. 03Without DRIP: $10,000 x (1.05)^20 = $26,533
    4. 04DRIP advantage = $46,610 - $26,533 = $20,077
    5. 05Reinvesting dividends nearly doubled the investment outcome

    Ready to run the numbers?

    Open Dividend Reinvestment (DRIP) Calculator