Dividend Reinvestment Scenario Calculator
Model changing share prices, dividends, reinvestment fractions, transaction fees and carried cash.
YOUR CALCULATION
Result
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Calculation steps
Work through one step at a time or reveal the complete calculation. The steps use your current inputs.
How to calculate
At each period end pay the dividend on shares held before that payment, earmark the entered fraction, and buy shares at the modeled period-end price when the earmarked cash can cover the purchase and fee.
Price_k=P0(1+g)^(k/f); dividend/share_k=D0(1+d)^((k−1)/f)/f
Worked example
100 shares priced at 50 with annual dividend 2, no growth or fees and one annual payment buy four shares in year one when fully reinvested; 104 shares remain.
Assumptions and input details
Hypothetical constant growth inputs, no market prediction. 1–50 whole years, 1/2/4/12 payments yearly. Dividend growth is applied at each period start; price growth at period end. Shares bought do not earn that same payment. Non-reinvested dividends accumulate as cash without interest; earmarked residual cash carries forward. Fees apply only when a positive purchase executes. All results before tax. No live market data or national tax rules are inferred. Enter consistent amounts in one currency unless explicitly stated otherwise.
References: FINRA: fractional shares and reinvestment
Using this calculator
Can I enter my own problem?
Yes. Replace the example values with your own inputs. The result, calculation steps, tables and applicable diagrams update from those inputs. Blank or invalid values clear the result; example values are never silently substituted for missing inputs.
Are the results exact?
Results use floating-point arithmetic and displayed rounding. Read the formula, assumptions and any stated data precision before interpreting the result.
Is my input uploaded?
The calculation runs in your browser. No account, file upload or external AI service is required. Inputs are not saved between page reloads.
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