Dividend Reinvestment Calculator (DRIP): Growth and Contributions
A dividend reinvestment plan, or DRIP, uses cash distributions to purchase additional shares of the same investment. This calculator models how dividend yield, dividend growth, share-price growth, monthly contributions, payment frequency, fractional-share rules, and transaction fees can change a hypothetical share count and income stream over time.
Dividend Reinvestment Calculator (DRIP)
The starting yield establishes the first annual dividend per share. Dividend growth then changes that dollar amount independently from share-price growth. Contributions are invested at month-end; dividends are modeled on their scheduled payment months.
Hypothetical quarterly DRIP with fractional shares. Taxes, ETF operating expenses, spreads, price/NAV differences, and changing market conditions are not included.
Year-by-year DRIP projection
| Year | Contributions | Shares | Share price | Annual dividend/share | Projected annual income | Portfolio value |
|---|---|---|---|---|---|---|
| Year-by-year results load when JavaScript is available. | ||||||
Published and last reviewed: July 23, 2026 | Author and reviewer: StockWin Editorial Team
What is a DRIP?
DRIP commonly means dividend reinvestment plan. Instead of leaving an eligible dividend as cash, the plan uses the payment to acquire additional shares of the same stock, ETF, or fund. Depending on the provider and security, the purchase may include fractional shares.
A company-sponsored plan, transfer-agent plan, brokerage reinvestment service, and fund distribution-reinvestment program can have different rules. Check eligibility, enrollment deadlines, purchase timing, price methodology, fractional-share treatment, fees, sale rules, and tax reporting before relying on a projection.
Dividend reinvestment formula
For one payment, start with the cash dividend:
Cash dividend = eligible shares x dividend per share
Then estimate the shares acquired:
Reinvested shares = (cash dividend - reinvestment fee) / reinvestment price
If only whole shares are permitted, round the acquired-share amount down and retain the unused balance as cash. The calculator carries that remainder forward until it can purchase another whole share.
How this DRIP calculator works
The starting share price and initial investment establish the beginning share count. The starting annual yield establishes the first annual dividend per share:
Starting annual dividend per share = starting share price x starting dividend yield
The model then runs monthly. Share price and annual dividend per share change using their separate growth assumptions. On a scheduled dividend month, the model calculates the payment on shares already owned, subtracts the entered reinvestment fee, and buys more shares. It then invests the month-end contribution after subtracting the entered purchase fee.
The order is deliberate: a month-end contribution is not assumed to qualify for a dividend paid earlier in that same modeled month. Real eligibility depends on the record date and ex-dividend date, which this simplified projection does not reproduce.
Default worked example
The default example starts with $10,000 at $50 per share, giving 200 starting shares. It assumes a 3% starting annual yield, $200 monthly contributions, 5% annual share-price growth, 4% annual dividend growth, quarterly payments, 20 years, fractional shares, and no transaction fees.
Under those constant assumptions, the model ends with about 1,186.612 shares at a projected $132.66 share price. Total contributions equal $58,000, gross modeled dividends total about $35,064, and the portfolio ends near $157,422. The final modeled annual dividend income is about $3,900. These numbers are hypothetical and not expected performance.
Dividend yield and dividend growth are not the same
Dividend yield relates an annualized dividend amount to share price. Dividend growth measures how the dividend-per-share amount changes. If share price and dividend per share grow at different rates, the projected yield changes.
A high current yield does not guarantee high future income. Yield can rise because price falls, and a company or fund can reduce, suspend, or eliminate distributions. Special distributions can also make a trailing or annualized figure unrepresentative.
Why share-price growth matters in a DRIP
A lower reinvestment price buys more shares from the same cash dividend, while a higher price buys fewer shares. At the same time, price changes affect the market value of all accumulated shares. A model that assumes a constant reinvestment price misses this interaction.
This calculator applies a smooth annual growth rate converted to monthly changes. Actual market prices are volatile, and the sequence of prices around payment and contribution dates can materially change the share count.
How payment frequency changes the projection
Monthly, quarterly, semiannual, and annual distributions reinvest at different times. Earlier reinvestment can give acquired shares more time to participate in later price changes and payments, but the effect depends on actual distribution dates and prices.
Do not convert an annual dividend into monthly payments unless the investment actually pays monthly or the calculation is explicitly hypothetical. Check the official distribution history for payment dates and per-share amounts.
Fractional shares versus whole shares
Fractional-share support lets a small dividend or contribution purchase part of a share. Without fractional shares, cash may remain uninvested until the balance is sufficient for one whole share. That cash drag can be meaningful when the share price is high or the dividend is small.
Broker rules vary. Fractional shares may be rounded to a stated precision, may not transfer between brokers, and can have different voting, corporate-action, or liquidation treatment. This calculator uses unlimited mathematical precision in fractional mode and whole-share rounding in whole-share mode.
How fees affect a DRIP
Some brokerage DRIP services charge no reinvestment fee, but company plans and account arrangements may impose purchase, service, sale, transfer, or other charges. Read the governing terms.
The calculator shows direct entered fees and a broader modeled fee impact. The broader impact compares the ending value with an otherwise identical zero-fee scenario, so it includes foregone future price growth and dividends on dollars used for fees.
DRIP taxes and cost basis
Automatic reinvestment does not necessarily make a dividend tax-free. In a taxable account, an investor may owe tax on a distribution even though the cash was used to purchase more shares. Each reinvestment purchase can create a new tax lot with its own acquisition date, quantity, price, and cost basis.
Tax rules depend on jurisdiction, account type, investor status, security, distribution character, withholding, and current law. The calculator does not estimate taxes or cost basis. Keep official confirmations and tax records, and consult a qualified professional when needed.
ETF dividends are not guaranteed
An ETF generally distributes eligible portfolio income after expenses according to its policies. The amount can change as holdings, portfolio income, expenses, tax treatment, and distribution schedules change. A bond ETF distribution can change with interest income and portfolio turnover; an equity ETF distribution can change with company dividends and index composition.
A distribution also reduces fund assets when it leaves the portfolio. On the ex-dividend date, price or NAV can adjust for the payment, all else equal. Reinvestment does not create free value; it converts distributed cash back into investment exposure.
DRIP projection versus total return
This calculator focuses on shares acquired from reinvested dividends and contributions. Total return is the broader investment-performance measure that combines price change and distributions under a stated methodology.
Official ETF total-return data may already assume dividend reinvestment and already reflect fund operating expenses. Do not add the modeled dividends from this page to a published total-return figure; that would double count income.
DRIP projection versus dividend income planning
The final annual-income output is shares multiplied by the modeled annual dividend per share at the end of the projection. It is not a guaranteed payment and does not account for taxes, payment timing, cash needs, dividend cuts, or price volatility.
An investor who needs cash income may choose not to reinvest every distribution. Compare the value of liquidity and spending needs with the potential compounding benefit of reinvestment.
Accumulating ETFs versus distributing ETFs
A distributing share class pays cash distributions that may be eligible for a brokerage DRIP. An accumulating share class generally retains and reinvests income within the fund. Manually adding a DRIP layer to the observed return of an accumulating share class can double count reinvested income.
Confirm the exact share class, domicile, currency, distribution policy, and tax treatment. Two share classes of the same strategy can show different prices and cash-flow histories.
Where to find reliable inputs
- Use the issuer's official product page for the exact ticker or share class.
- Check distribution history for actual per-share amounts, declaration dates, ex-dates, record dates, and payment dates.
- Verify whether a displayed yield is trailing, forward, indicated, SEC yield, or another measure.
- Review the current prospectus and shareholder report for distribution and expense information.
- Read the broker or plan administrator's DRIP terms for eligibility, fees, fractional shares, purchase timing, and pricing.
- Record whether the investment is distributing or accumulating.
What this calculator does not include
- Federal, state, local, foreign, or withholding taxes.
- ETF expense ratios or changing operating expenses.
- Bid-ask spreads, market impact, slippage, or premium/discount changes.
- Irregular payment dates, special dividends, return of capital, or capital-gain distributions.
- Dividend cuts, suspensions, eliminations, or changes in portfolio holdings.
- Broker-specific rounding, delayed execution, pooled purchase pricing, or minimum reinvestment amounts.
- Foreign-exchange changes or currency-conversion fees.
- Inflation or the purchasing power of future income.
Year-by-year table interpretation
The table shows the model at each year-end after scheduled payments and month-end contributions. Portfolio value includes shares at the modeled price plus any cash remainder. Projected annual income uses the ending share count and annual dividend per share at that point.
The table should be used for sensitivity testing. Change one input at a time to see which assumptions drive the result. Test zero dividend growth, lower price growth, a dividend cut represented by a negative growth rate, whole shares only, and nonzero fees.
Common DRIP mistakes
- Treating yield as guaranteed. Dividend amounts and share prices change.
- Adding dividends to published total return. Total-return figures usually already include distributions.
- Ignoring taxes. Reinvested taxable distributions can still create a tax liability.
- Assuming every broker supports fractional DRIP shares. Eligibility and precision vary.
- Using the payment date as the only eligibility date. Ex-date and record-date rules matter.
- Ignoring cash remainders and fees. Small uninvested balances and repeated charges can compound.
- Confusing dividend growth with portfolio growth. Dividend per share and market price are separate variables.
- Presenting a smooth path as a forecast. Real prices and dividends do not grow at constant rates.
Primary sources and further reading
- Investor.gov: Direct Investing and Dividend Reinvestment Plans
- Investor.gov: Exchange-Traded Funds
- Investor.gov: Compound Interest Calculator
- Investor.gov: Mutual Fund Conversion to ETF Bulletin
- Investor.gov: Mutual Fund and ETF Fees and Expenses
- FINRA: Exchange-Traded Funds and Products
- FINRA: Fund Analyzer Methodology
- Fidelity: Reinvesting Dividends and Capital Gains
- Fidelity: Fractional Shares and Dividend Reinvestment
- Fidelity: What Is a Dividend?
- Charles Schwab: Dividend Reinvestment Plans
Continue through the StockWin ETF calculator cluster
- ETF Total Return Calculator
- ETF Cost Calculators Hub
- ETF Total Cost Calculator
- ETF Expense Ratio Calculator
- ETF Tracking Difference Guide and Calculator
- ETF Bid-Ask Spread Cost Calculator
- ETF Premium/Discount to NAV Calculator
- ETF Basics Guide
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Frequently asked questions
What does DRIP stand for?
DRIP commonly stands for dividend reinvestment plan. It uses eligible cash dividends to purchase more shares of the same investment.
Does a DRIP guarantee compound growth?
No. Reinvestment increases share count, but share prices can fall and dividends can be reduced or eliminated. A DRIP does not guarantee profit.
Are DRIP purchases free?
Some brokers charge no reinvestment fee, while company plans or account arrangements may charge purchase, service, sale, transfer, or other fees. Check the actual terms.
Can a DRIP buy fractional shares?
Many brokerage programs can, but eligibility and rounding precision vary. Other programs retain cash until a whole share can be purchased.
Are reinvested dividends taxable?
They may be taxable in a taxable account even when automatically reinvested. Treatment depends on jurisdiction, account type, and distribution character.
Does dividend reinvestment change cost basis?
Each reinvestment purchase can create a new tax lot and add to cost basis. Keep accurate records and verify the broker's reporting.
Why does the calculator separate dividend growth from price growth?
Dividend per share and market price can change at different rates. Separating them avoids assuming a constant yield forever.
Does the calculator include an ETF expense ratio?
No. ETF operating expenses are reflected in NAV and observed performance. Use the StockWin expense-ratio and total-return tools for separate hypothetical cost analysis.
Can I use the calculator for an accumulating ETF?
Not without careful adjustment. Accumulating share classes reinvest income inside the fund, so adding an external DRIP can double count income.
Does the calculator predict future dividends?
No. It applies a constant growth assumption for sensitivity analysis. Actual payments can be irregular, reduced, suspended, or eliminated.
Important: This calculator is educational information, not investment, tax, legal, accounting, income-planning, or brokerage advice. It does not recommend a security or DRIP provider. Verify current issuer, fund, broker, plan, and tax documents before acting.
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