Retirement

Retirement Income & Cash Flow Calculator

Calculate your total monthly retirement income by combining 401(k)/IRA withdrawals, Social Security benefits, pensions, and annuities.

What this calculator does

The Retirement Income & Cash Flow Calculator estimates your result instantly from the values you enter, using standard retirement formulas. Calculate your total monthly retirement income by combining 401(k)/IRA withdrawals, Social Security benefits, pensions, and annuities. Calculations run in your browser, so nothing you type is sent to a server, and the output is an estimate for planning rather than financial advice.

Retirement Income Calculator Results

$0.00

Total Monthly Retirement Income

  • Total Annual Income —
  • From Portfolio (monthly) —

What This Means

About Retirement Income & Cash Flow Calculator

The Retirement Income Calculator aggregates all retirement cash flow streams (401k/IRA portfolio withdrawals, Social Security, defined-benefit pensions, rental income, and annuities) to project net monthly living income.

Formula & Mathematical Calculation

Total Monthly Retirement Income = Portfolio Monthly Withdrawal (4% Rule) + Social Security + Pension + Other Passive Income

Calculation Example

Example: $1.2M Portfolio @ 4% ($4,000/mo) + Social Security ($2,500/mo) + Pension ($1,200/mo) → Total Monthly Retirement Income = $7,700/month ($92,400/year).

Key Benefits

  • Aggregates all guaranteed and portfolio retirement income streams
  • Incorporates the 4% Safe Withdrawal Rule for portfolio decumulation
  • Identifies monthly retirement income surplus or lifestyle shortfall
  • Models post-retirement income taxes
  • Essential for pre-retirees within 5-10 years of retirement

How to Use this Calculator

  1. Enter Total Retirement Savings Balance
    Input combined 401(k), IRA, and brokerage savings.
  2. Enter Expected Social Security & Pension
    Input monthly Social Security estimate and pension check.
  3. Enter Desired Monthly Spending
    Input target monthly living budget.
  4. Calculate Retirement Income
    Click Calculate to view monthly cash flow breakdown.

Assumptions & Limitations

What the calculation assumes

  • Every value you enter is treated as an exact, known amount.
  • Rates and contributions are assumed to stay constant for the whole period unless the form asks for them separately.
  • Results use standard financial formulas and ignore fees, penalties and promotional terms that are not entered above.
  • Inflation, tax changes and market volatility are not modelled unless a field for them is provided.
  • Amounts are unit-agnostic: results are returned in the same currency you enter.

What it does not cover

  • Retirement Income & Cash Flow Calculator produces estimates for education and planning, not a quote, offer or professional advice.
  • Real-world outcomes differ when fees, taxes, rounding rules or provider-specific terms apply.
  • Local regulations and tax rules vary by country and change over time; verify current rules for your jurisdiction.
  • Figures are only as accurate as the inputs you supply — check them before acting on the result.
  • For decisions with lasting financial impact, confirm the numbers with a qualified professional.

Frequently Asked Questions

Most financial planners estimate you will need 70% to 80% of your pre-retirement income to maintain your standard of living in retirement.

It applies your chosen withdrawal rate to your portfolio to get an annual withdrawal, divides that by 12 for the monthly portfolio income, and then adds your Social Security, pension, and any other monthly income on top. Multiplying the combined monthly total by 12 gives the annual figure.

The withdrawal rate sets how much of your portfolio you draw each year. The tool multiplies the portfolio by that rate as a decimal to find the yearly draw, so a 4% rate on a $1,000,000 portfolio yields $40,000 a year, or about $3,333 a month before your other income sources.

Enter them as monthly amounts. The tool adds Social Security, pension, and other income directly to the monthly portfolio withdrawal, then multiplies that monthly sum by 12 to present the annual total.

You need a portfolio value above zero and a withdrawal rate above zero, both of which the tool checks before calculating. Social Security, pension, and other income are optional additions that raise your projected monthly and annual income without changing how the portfolio draw itself is figured.

Free to use, no account needed. Calculations run in your browser, so nothing you type is sent to a server. Results are estimates — how we build and check our calculators.

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Next step: browse the full Retirement calculators or read the related guides for context before you decide.