Retirement Nest Egg Calculator
Required portfolio size to fund retirement income at safe withdrawal rate
Calculate required nest egg to fund retirement at safe withdrawal rate. Enter desired annual income and other income annual for an instant result.
What this tool does
Enter desired annual income, other annual income, withdrawal rate, and years in retirement. The calculator returns nest egg target, portfolio income needed, monthly spending, lifetime spending, and withdrawal rate.
Enter Values
Formula Used
Spotted something off?
Calculations, display, or translation — let us know.
Disclaimer
Results are estimates for educational purposes only. They do not constitute financial advice. Consult a qualified professional before making financial decisions.
How Nest Egg Target Calculates
Required portfolio equals annual income needed from portfolio divided by safe withdrawal rate. 50,000 annual portfolio income at 4% rate requires 1,250,000. Other income (social security, pension) reduces portfolio income need, reducing required nest egg. The calculator computes specific target for any combination of desired spending and other income sources.
Worked Example
Desired 60,000. Other income 30,000. Withdrawal 4%. Portfolio income needed: 30,000. Nest egg: 750,000. The retiree needs 750,000 invested portfolio to fund 30,000 annual portfolio withdrawal at 4% sustainable rate. Combined with 30,000 other income totals desired 60,000. Without other income: 1,500,000 portfolio needed.
What This Does Not Model
Inflation effects across retirement. Tax treatment of withdrawals. Sequence of returns risk. Healthcare cost growth. Specific portfolio allocation effects on sustainable rate. Variable spending across retirement phases.
Which inputs matter most
You enter Desired Annual Income, Other Income Annual, Withdrawal Rate, and Years in Retirement. The rate and the time horizon usually dominate — compounding means a small change in either reshapes the final figure more than a similar shift in contribution size. Test this by doubling one input at a time.
What's happening under the hood
Portfolio income needed equals desired minus other income. Nest egg divides portfolio need by withdrawal rate. Monthly spending divides desired by 12. Lifetime spending multiplies desired by years. Results are estimates for illustration only. The formula is listed in full below. If the number looks off, you can retrace the calculation by hand — that's the point of showing the working.
How to use this beyond the first run
Re-run the calculation once a year. Life changes — pay rises, new expenses, interest-rate shifts — and the figure that looked right 12 months ago often isn't today. Annual recalibration keeps the plan honest.
What this doesn't capture
The calculation assumes a steady savings rate and a stable interest rate. Real saving journeys include emergencies, windfalls, and rate changes — especially in easy-access products. The figure is a direction of travel, not a guarantee.
Desired $60,000 annual minus other income at 4%% withdrawal needs $750,000.00.
Inputs
This example uses typical values for illustration. Adjust the inputs above to match a specific situation and see how the result changes.
Sources & Methodology
Methodology
Portfolio income needed equals desired minus other income. Nest egg divides portfolio need by withdrawal rate. Monthly spending divides desired by 12. Lifetime spending multiplies desired by years. Results are estimates for illustration only.
References
Frequently Asked Questions
What withdrawal rate should I use?
Should I include all income sources?
Does this adjust for inflation?
What if I cannot reach the target?
Related Calculators
More Savings Calculators
Savings
1000-Day Savings Challenge Calculator
Calculate total savings from a 1000-day challenge that saves an increasing amount each day. Enter starting daily amount to see total saved across 1000 days.
Savings
Annual Savings Growth Calculator
Calculate year-over-year savings growth rate from current and prior balance. Enter last year's savings and see the result instantly.
Savings
Bucket Retirement Strategy Calculator
Allocate retirement savings across three buckets — immediate cash, medium-term income, and long-term growth. Enter retirement pot to see each bucket's amount.
Savings
Bucket Strategy Calculator
Split a portfolio into near-term cash, medium-term bonds, and long-term growth buckets based on target allocations. Educational tool, no signup required.
Savings
Cash vs Invest Calculator
Compare long-term value of holding cash vs investing the same amount at expected market returns. Enter cash rate and investment return to see opportunity cost.
Savings
Catch-Up Savings Calculator
Work out the monthly contribution needed to reach a savings goal given what you already have, years remaining, and an expected return rate.
Explore Other Financial Tools
Utilities
Software Subscription Cost Calculator
Total monthly and annual cost across up to five software subscriptions. Enter subscription 1 monthly and subscription 2 monthly for an instant result.
Financial Health
Financial Freedom Number Calculator
Calculate your Financial Freedom number using the 4% rule. See how long it takes to reach based on current investments and contributions.
Digital Nomad & Freelance
Annual Freelance Revenue Calculator
Calculate annual freelance revenue from monthly billable hours, hourly rate, and working months per year. Free and educational.