How to use the results
Treat outputs as planning ranges. Try lowering expected returns, adding years with negative returns, and reducing dividend growth. If a plan only works under perfect conditions, it is a fragile plan.
1) Compounding and contributions
This calculator estimates how a portfolio value might evolve when you combine an initial amount, regular contributions, and an assumed annual return. It is helpful for understanding the relationship between time, savings rate, and growth. It is not a promise because real markets do not deliver smooth yearly outcomes. Still, a simple model is valuable when you use it to compare options, such as increasing contributions, extending the horizon, or lowering fees.
Results
The table shows the end-of-year balance under a constant monthly contribution and a constant net annual return. Use the “Total contributed” figure to see how much of the ending value came from deposits versus growth under the scenario.
Ending value
$0
Scenario output
Total contributed
$0
Initial + deposits
Implied growth
$0
Ending - contributed
| Year | Start value | Contributions | End value |
|---|---|---|---|
| Run the calculator to see yearly values. | |||
Limitations
This model assumes a steady monthly rate derived from the annual return. Real portfolios experience uneven returns, and investor behavior matters. Consider testing a lower return or adding higher fees to see how sensitive the outcome is.
2) Dividend income scenario
Dividend income is not fixed. Companies can increase, freeze, reduce, or suspend payouts, and the market value of the shares can fluctuate at the same time. This calculator estimates annual cash income based on a current portfolio value and an assumed yield, then shows how income could evolve if dividends grow at a given rate. Use it to understand the difference between yield today and income sustainability over time.
Income outlook
This scenario holds portfolio value flat and focuses only on dividend cash income. In reality, prices and yields can move in opposite directions, and companies can change payout policies. Use this as a planning aid, not as an expectation.
Year 1 income
$0
After stress-test cut
Final year income
$0
End of horizon
Average per month
$0
Year 1, simple average
| Year | Yield assumption | Estimated income |
|---|---|---|
| Run the calculator to see the yearly income path. | ||
Interpretation tips
If you depend on income, consider a margin of safety. Many income plans include a reserve buffer so that a payout cut does not force a sale at a bad time. If you plan to reinvest dividends, compare this calculator with the compounding tool above to understand reinvestment effects.
3) Rebalancing band check
Rebalancing is a process for keeping your portfolio aligned with a target allocation, such as 60% equities and 40% bonds. A common rule uses bands: if an asset class drifts above or below the target by a set percentage, you rebalance. This tool shows whether your current allocation is within your chosen band and how far each asset is from target. It is a simple way to enforce discipline without needing to predict markets.
Allocation status
The recommendation below is mechanical and based on your band rule. It does not consider taxes, transaction costs, or whether your targets still match your risk tolerance. Many investors use new contributions first to move back toward target before selling anything.
Current equities %
0%
Based on values entered
Band result
Run the check
Target range will appear here
Suggested adjustment (informational)
Enter values and run the checker to see an example adjustment amount that would bring the portfolio back to the target.
| Asset | Target % | Current % | Difference (pp) |
|---|---|---|---|
| Run the checker to populate the table. | |||
Need context for these tools?
Calculators are most useful when paired with a process. If you have not yet chosen a target allocation or you are unsure how to think about dividends and total return, read the strategies section first. It explains common portfolio structures, how investors set risk limits, and when income becomes a planning variable rather than a performance goal.
Education first, tools second.