A dividend calculator answers two questions: how much income does this investment pay today, and what does it grow into if the dividends are reinvested and rise over time. The second is where the interesting numbers live, because dividend growth compounds on top of reinvestment.
How it is calculated
- Annual income now = investment × yield. $50,000 at 3.5% pays $1,750 a year, about $146 a month.
- Each year: contributions are added; dividends = portfolio value × current yield; tax is taken off; if reinvesting, the after-tax dividends buy more shares.
- Share price grows at the price-growth rate. Dividends per share grow at the dividend-growth rate, so the yield on the portfolio’s value drifts by the difference between the two.
- Yield on cost = the final year’s income ÷ your original investment, the number long-term dividend investors watch.
Example
$50,000 at a 3.5% yield, dividends growing 5% a year, price growing 4%, reinvested, 15% tax, 20 years: the portfolio reaches about $190,000 and pays roughly $8,400 a year after tax, a yield on cost near 17%. Taken as cash instead, the portfolio grows to about $110,000 and the income in year 20 is about $4,900. Reinvestment roughly doubles the outcome; that is the compounding.
Choosing realistic inputs
Broad US index funds yield around 1.3%; dividend-focused funds and mature companies 3–5%; anything above 8% deserves scepticism. Long-run dividend growth for the S&P 500 has averaged about 5–6% a year. Price growth and dividend growth tend to converge over decades, since a company cannot pay out a rising share of a static value forever. Taxes: in the US qualified dividends are taxed at 0, 15 or 20%; in an IRA or 401(k), enter 0.
Frequently asked questions
How much do I need to invest to get $1,000 a month in dividends?
$12,000 a year ÷ yield. At 3.5% that is about $343,000; at 5%, $240,000. Enter the yield above and adjust the investment until the monthly income hits your target.
What is a good dividend yield?
Between 2% and 5% for established companies and funds. Higher yields usually mean higher risk of a cut. Total return, dividends plus price growth, matters more than yield alone.
Should I reinvest dividends?
If you do not need the income, yes: reinvesting is where most long-term growth comes from. The year-by-year table shows the difference between the two choices for your numbers.
What is yield on cost?
This year’s dividend income divided by what you originally paid. As dividends grow, yield on cost rises even if the current yield stays the same. It is a measure of how well an old purchase is paying, not a reason to buy today.
Are dividends taxed?
In a taxable account, yes: in the US, qualified dividends at 0, 15 or 20% and ordinary dividends as income. In retirement accounts they are not taxed when paid. Set the tax field to match your situation.
Read more
- How much do you need invested to live on dividends?The capital behind $1,000, $2,000 or $5,000 a month, at yields from 2% to 7%, and what it takes to build it from a normal salary. With the arithmetic laid out and the catch in the high-yield column explained.
Sources
- IRS Topic 404: Dividends
- S&P Dow Jones Indices: S&P 500 dividend data
- SEC Investor.gov: Dividend Reinvestment Plans
By Calcelate Team. Formula from the sources above.
- 2026-09-14 · Formula and texts checked