#3352 · Finance Tool

Required Minimum Distribution Income Forecast Calculator

Forecast how required minimum distributions may combine with Social Security, pension, and other taxable income. Enter an estimated RMD and annual growth assumptions to see first-year gross income, five-year cumulative income, and the share attributable to retirement-account withdrawals. This is a cash-flow forecast, not a tax return calculation.

Calculator

Retirement income assumptions
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How to use this calculator

  1. Enter values for the scenario and jurisdiction you are testing.
  2. Check rates, time periods, and dollar amounts carefully.
  3. Select Calculate or change an input and calculate again.
  4. Review the main estimate together with every supporting result.
  5. Use Reset to restore the example assumptions.

Formula

Year n income = current RMD × (1 + RMD growth)ⁿ⁻¹ + other income × (1 + other-income growth)ⁿ⁻¹.

What the result means

Gross income measures cash inflow before taxes. The RMD share highlights how much of the five-year forecast comes from mandatory retirement withdrawals.

This tool does not determine whether every income source is taxable or model Medicare premiums, deductions, credits, or filing status.

Example calculation

A $20,000 RMD plus $55,000 of other income produces $75,000 of first-year gross income. With 3% and 2% annual growth respectively, later years are compounded separately.

Tips for better results

  • Separate gross cash flow from taxable income.
  • Use nominal growth assumptions if your spending plan is nominal.
  • Run a zero-growth case as a baseline.
  • Update the forecast when the actual annual RMD becomes known.

Frequently asked questions

Is Social Security included in other income?

You may include it for cash-flow planning, but this calculator does not determine its taxable portion.

Does the forecast calculate federal income tax?

No. It forecasts gross income only; use a tax-specific estimate for taxes.

Can RMD growth be negative?

Yes, as long as it is greater than -100%; account losses or changing divisors can reduce an RMD.

Are the five-year totals inflation adjusted?

No. The totals are nominal and follow only the growth rates you enter.

Should pension income go in other income?

Yes, if you want it included in gross cash flow, while remembering its tax treatment may differ.

Inputs and calculation roles

OutputMeaning
First-year gross incomeRMD plus other income
Five-year gross incomeAll projected income
Five-year RMD incomeRMD portion only
RMD shareRMD total ÷ gross total

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