DRIP Calculator
Most dividend tools show you a value. This one shows you the share count — because shares are what a reinvestment plan actually buys, and shares are what pay you later. Quarterly reinvestment, formula shown.
Quick answer
$25,000 buys 500 shares at $50.00. Reinvesting every dividend for 20 years turns that into 1,319.1 shares — 2.64× as many — worth $144,512 and paying $8,461 a year. Taking the cash instead leaves you with the same 500 shares and $3,207 a year.
Your share count, bought with dividends
Nothing was added after the first purchase. Every share above the starting line was paid for by a dividend.
Reinvest vs take the cash
The same investment, the same company, the same twenty years — one decision different.
| Strategy | Shares owned | Value | Annual income |
|---|
What the share price does to your share count
This is the part most DRIP tools never show. Same investment, same dividend — only the price path changes.
| Price growth | Shares after 20 yr | Value | Annual income |
|---|
What a DRIP actually does
A dividend reinvestment plan uses each dividend to buy more shares of the same company instead of paying you cash. Those shares pay dividends too, which buy more shares. The loop is the whole product.
What makes it worth a separate calculator is that the interesting variable is not the portfolio value — it is the share count. Your future income is share count multiplied by dividend per share, so shares are the thing being accumulated and the thing that pays you. A tool that only reports a dollar value hides the mechanism.
In the default scenario, $25,000 buys 500 shares. Twenty years later you own 1,319 shares. You never added a cent — 819 shares were bought entirely by dividends.
The part nobody tells you: a rising price hurts accumulation
Everyone assumes a rising share price is unambiguously good. For a reinvesting investor it is not, and the effect is large.
Each dividend buys shares at the price on the day. A higher price buys fewer shares. Over decades that compounds in reverse: fewer shares means smaller dividends means fewer shares again.
| Annual price growth | Shares after 20 years | Portfolio value | Annual income |
|---|---|---|---|
| 0% — a flat price | 2,264 | $113,199 | $14,522 |
| 2% | 1,661 | $123,436 | $10,657 |
| 4% | 1,319 | $144,512 | $8,461 |
| 6% | 1,108 | $177,733 | $7,109 |
| 8% | 970 | $226,157 | $6,225 |
Read the two extremes. A flat share price produces 2,264 shares paying $14,522 a year. An 8% rising price produces 970 shares paying $6,225 — less than half the income — while ending with roughly double the value.
Neither column is "better". They are answers to different questions. If you are building an income stream to live on, a boring price while you accumulate is genuinely helpful. If you are building wealth to sell, it is not. What you should not do is assume the two goals point the same way, because as the table shows, they point in opposite directions.
Reinvesting vs taking the cash
| Shares | Value after 20 yr | Annual income | Cash received along the way | |
|---|---|---|---|---|
| Reinvest | 1,319 | $144,512 | $8,461 | $0 |
| Take the cash | 500 | $54,778 | $3,207 | $38,155 |
Reinvesting ends with 2.64× the shares and 2.64× the income — the two ratios are identical, because income is simply share count times dividend per share.
The honest column is the last one. The cash route did not vanish: it handed over $38,155 along the way, which you may have spent, invested elsewhere, or needed. Adding that to the $54,778 of value gives $92,933 against the reinvested $144,512 — still a clear win for reinvesting, but not the crushing one the first two columns suggest on their own.
Why it looks like nothing is happening for a decade
| Years held | Shares | Multiple | Annual income |
|---|---|---|---|
| 5 | 616 | 1.23× | $1,650 |
| 10 | 776 | 1.55× | $2,779 |
| 20 | 1,319 | 2.64× | $8,461 |
| 30 | 2,505 | 5.01× | $28,773 |
Five years of reinvesting adds 116 shares. The five years from 25 to 30 add far more, because by then every dividend is being paid on a much larger pile. This is ordinary compounding, and it means a DRIP judged at year five will always look like a waste of time.
Fractional shares matter less than you think
If your broker only reinvests in whole shares, the leftover cash waits until it is enough to buy another one. Intuitively that sounds costly. Measured, it is not: in the default twenty-year scenario, whole-share reinvestment produces 1,317 shares against 1,319 with fractional — about $13 a year of income difference.
Worth having, not worth switching brokers over. Toggle it above to see it on your own numbers.
How the calculation works
Reinvestment is modelled quarterly, because that is how most US dividends and broker DRIPs actually run. Each quarter:
- The share price grows by a quarter of your annual price growth (compounded, not divided).
- The dividend per share grows by a quarter of your annual dividend growth.
- You are paid shares × dividend per share.
- That cash buys payment ÷ new price more shares, which count from the next quarter on.
There is no closed-form shortcut here, because the price and the dividend both move between every purchase. The calculator runs all 80 quarters of a twenty-year hold rather than approximating.
See the method with your own numbers
These update live from the calculator inputs above.
What this does not model
- Tax. In a normal brokerage account a reinvested dividend is generally taxable in the year it is paid, even though no cash reached you — so the tax must come from somewhere else. Figures here are gross.
- Dividend cuts. The model assumes the dividend is never cut. That is its most optimistic assumption by a distance.
- Smooth growth. Prices are applied as a steady rate. Real prices are not steady, and a DRIP actually benefits from volatility — dips buy more shares.
- Fees. Most brokers offer DRIP free; some plans charge, and a fee comes straight out of the shares bought.
Frequently asked questions
What is a DRIP?
A dividend reinvestment plan automatically uses each dividend to buy more shares of the same company instead of paying you cash. Those extra shares pay dividends of their own, which buy more shares again. Most US brokers offer it free and support fractional shares.
How many shares will a DRIP give me?
It depends on the yield, the dividend growth and — most of all — the share price along the way. $25,000 buying 500 shares at $50, on a 4% yield growing 6% a year with 4% price growth, reaches about 1,319 shares after 20 years: 2.64 times the original count, all bought with dividends.
Is a rising share price good for DRIP?
For your value yes, for your share count no. Every reinvested dividend buys fewer shares at a higher price. Over 20 years on the same investment, 0% price growth accumulates about 2,264 shares paying $14,522 a year, while 8% growth accumulates about 970 shares paying $6,225 — less than half the income, though more than double the value.
Is DRIP better than taking the cash?
While you are still building, usually yes — and on income as well as value. Reinvesting produces 1,319 shares paying $8,461 a year against 500 shares paying $3,207. The fair comparison counts the $38,155 of cash the other route handed over along the way, which still leaves reinvesting ahead.
Do I need fractional shares for a DRIP?
It helps, but less than people expect. Whole-share-only reinvestment leaves small amounts of cash waiting between purchases. In the default 20-year scenario that is 1,317 shares against 1,319 — roughly $13 a year of income. Worth having, not worth switching brokers for.
Are reinvested dividends taxable?
In a normal brokerage account, generally yes. The dividend is usually taxed in the year it is paid even though you never saw the cash, which means the tax has to come from elsewhere. In a tax-advantaged account it typically does not — one reason DRIP strategies are often held there.
Method & sources
- Calculation: quarterly reinvestment over the full holding period — price and dividend per share both compounded quarterly, each dividend buying shares at that quarter's price. Verified against an independent test suite (18 checks), including that a flat price accumulates more shares than a rising one.
- Figures are gross of tax and fees, and assume the dividend is never cut.
- Reviewed:
Educational estimate, not financial advice. Dividends can be cut or suspended at any time.
Run your own numbers
Enter what you invested, the share price, the dividend and how fast each is growing — and see the share count, not just the value.
Back to the calculator ↑