Retirement Calculator
How Much Do You Need to Retire?
Results
| Nest Egg Needed at Retirement | — |
|---|---|
| Projected Savings at Retirement | — |
| Surplus / Shortfall | — |
| Percent Funded | — |
| Monthly Income (at retirement) | — |
| Monthly Income (today's money) | — |
| To Reach Target — Save Monthly | — |
| To Reach Target — Save Annually | — |
| To Reach Target — Save % of Income | — |
How to Use This Retirement Calculator
Retirement planning spreadsheets always die on row forty-seven when someone asks "but what if I only need 70% of income?" This calculator handles that tradeoff—project savings from today, size the nest egg through life expectancy, and show whether you're funded or how much more to save.
- Enter ages. Current age, planned retirement age, and life expectancy set your savings horizon and withdrawal period.
- Enter income and assumptions. Pre-tax income, expected income growth, investment return, and inflation rate.
- Set income needed after retirement. Choose % of current income or a $ amount in today's dollars (e.g., 75% replacement).
- Add optional inputs. Other monthly income (Social Security, pension), current retirement savings, and future savings as % of income or fixed $.
- Press Calculate. Review nest egg needed, projected savings, surplus/shortfall, percent funded, monthly income, and save-more targets.
Estimate Social Security with the Social Security Calculator, employer plan growth with the 401K Calculator, and required withdrawals later with the RMD Calculator.
Retirement Formulas and Practical Applications
The model follows mainstream planner logic: grow today's savings and contributions to retirement, compare against a spending target adjusted for inflation and other income, then spread any portfolio shortfall back into required extra savings.
Replacement income target
Annual Need ≈ (Replacement Rate × Projected Pre-Retirement Income) − Other Income
At $90,000 pre-retirement income and 75% replacement, you'd target about $67,500/year before other income. $2,000/month from Social Security leaves roughly $43,500 for the portfolio to cover.
Nest egg and funding ratio
The lump sum needed discounts recurring portfolio withdrawals through life expectancy at your real return assumption. Percent Funded = projected savings ÷ nest egg needed—under 100% means you're short unless you save more or retire later.
Frequently Asked Questions
How is the nest egg needed at retirement calculated?
The calculator estimates retirement spending need from your income replacement target, subtracts other monthly income like Social Security or pension, and converts the portfolio gap into a lump sum using your return and inflation assumptions through life expectancy.
Can I enter income needed as a percentage or dollar amount?
Yes. Use the unit selector next to Income Needed After Retirement to choose percent of current income or a fixed dollar amount in today's money.
What does Other Income After Retirement include?
Enter monthly Social Security, pension, rental, or other fixed income expected at retirement. It reduces how much your portfolio must provide.
What does Percent Funded mean?
Percent Funded compares projected savings at retirement to the nest egg needed. Below 100% indicates a shortfall; above 100% indicates a surplus.
How are the save-more recommendations calculated?
If you are not fully funded, the calculator solves for additional monthly, annual, or percent-of-income savings needed to close the gap by retirement age.