Estimate a financial-independence target from spending and an initial withdrawal rate, then project the time required to reach it. This simplified FIRE calculation connects the amount you save with the lifestyle your investments need to support.
Editorial Policy · Methodology · Corrections Policy
Before you enter your numbers
Income minus annual spending is treated as annual savings. Use spendable income after tax, or include tax payments within spending, so the model does not invest money that is owed as tax. Include health coverage, housing maintenance and dependent support in the spending figure.
- Current age
- Current savings
- After-tax income
- Annual spending
- Expected annual return
- Planned withdrawal rate
Input reference
- Current age: Your age at the start of the projection. This determines how long contributions can compound before the selected retirement date; it does not set legal access to a pension or retirement account.
- Current savings: The current balance committed to this goal. Use a recent statement and exclude money reserved for unrelated goals. This starting value is already invested, so do not also enter it as a recurring contribution.
- Annual return: An assumed nominal annual rate, divided by 12 in monthly projections. It is held constant. It is not a guaranteed yield, and the default should be replaced with an assumption suited to your scenario.
Formula and calculation method
Target portfolio = annual spending / withdrawal rate. Annual saving = max(0, income − spending), contributed in equal monthly installments. The tool grows the balance monthly until it reaches that fixed target or the 100-year simulation limit.
Worked example
Annual spending of 36,000 and a 4% initial withdrawal rate imply a 900,000 target. At 3%, the target rises to 1,200,000. With 60,000 of spendable income, annual saving is 24,000, a 40% saving rate. From 300,000 at zero return, reaching 900,000 takes 25 years.
How to interpret the result
The result panel reports a target portfolio, annual savings, savings rate, estimated years to target and estimated early retirement age.
A withdrawal rate is an assumption, not a universal safe rate. An unusually long retirement needs attention to longevity, inflation and losses early in drawdown. This tool does not model future public benefits, account-access restrictions or part-time earnings after retirement. Using consistent real amounts can support a purchasing-power scenario.
How the early-retirement target is estimated
The early-retirement target is estimated by dividing annual spending by the withdrawal rate you select. At a 4% withdrawal rate, 45,000 of annual spending corresponds to a 1.125 million target before accounting for taxes or other income.
The calculator then grows current savings and adds the difference between income and spending as new annual savings. This makes the savings rate visible, which is often more useful for early-retirement planning than income alone.
Plan the bridge to later-life benefits
Early retirement usually has several phases: the period before public benefits, the period after they begin, and possible later care costs. This tool uses a single spending amount and ignores those transitions. A useful next step is a year-by-year cash-flow outline identifying which account pays for each phase.
Spending cuts have two effects in this model: they reduce the portfolio target and increase annual saving. That can accelerate the result sharply. Check whether the lower spending figure is sustainable for decades, including irregular replacements, holidays and family commitments, before relying on the earlier date.
Account for the years before pensions or public benefits begin
Early retirement often creates a bridge period in which personal savings must cover most expenses before a public pension, workplace pension or other age-linked benefit starts. Model that gap explicitly instead of assuming every income source begins on the day you stop working.
Healthcare, housing and taxes may also change before and after normal retirement age. The calculator gives a simplified target, so test a higher-spending bridge scenario and a lower post-benefit scenario when those differences are material to your plan.
Stress-Test The Bridge To Pension Age
An early-retirement result should be stress-tested against a longer retirement horizon and a delayed public pension. Use the withdrawal calculator to test the bridge years, then compare the result with the standard retirement-age scenario.
Retirement planning guides · Calculation methodology
Rules and limits can change. Use these primary sources to verify time-sensitive details.
Early Retirement Calculator FAQs
Does 4% guarantee that I will never run out?+
No. A starting withdrawal percentage is not a guarantee for every portfolio, retirement length or market sequence. Compare lower rates and consider flexible spending before relying on the target.
Where can I check the assumptions behind this result?+
Check the formula and limitations sections on the Early Retirement Calculator page for the assumptions specific to this tool. The methodology page explains conventions shared across calculators, and Investor.gov: compound interest inputs and compounding is the reference for any time-sensitive statutory or product rule mentioned here.
What does the Early Retirement Calculator result include?+
The result focuses on a target portfolio, annual savings, savings rate, estimated years to target and estimated early retirement age. It is calculated from the inputs shown on this page rather than from live account, market or government data. Read the formula and limitations section before transferring the result into another planning tool.
What should I change when testing another Early Retirement Calculator scenario?+
Change one major assumption at a time so you can see what drives the result. Useful inputs to test include Current age, Current savings, After-tax income, Annual spending, Expected annual return. Use a conservative case alongside your central estimate rather than relying on only the most favorable combination.
Can the Early Retirement Calculator replace an official statement or professional advice?+
No. It is a planning calculator. Early retirement creates a longer funding period and may begin before public pensions or employer benefits are available. Model the gap years separately. Use official statements and current rules when an exact legal, tax, pension or account figure is required.
