FIRE Goal Calculator

Enter a target portfolio that has been developed outside the calculator rather than treating a round number as self-justifying. One way to investigate a target is to estimate portfolio-funded spending, account for other dependable income, and test several withdrawal assumptions. Housing, healthcare, dependants, taxes, irregular replacements, and emergency reserves can materially change that work. The calculator accepts the resulting target; it does not decide what amount is sufficient.

Then choose whether the entered target is already a future nominal amount or represents today's purchasing power. If it is in today's money, the calculator compounds the inflation assumption to create the future nominal target used by both reverse solves. If it is already the amount needed at the deadline, select nominal so inflation is not applied twice.

The required-contribution result holds the entered effective annual return constant. It first grows current savings to the target date, then solves the end-of-month contribution that fills the remaining future-value gap. This is the useful lever when the return assumption is a planning input and the question is how much must be saved.

The required-return result holds current savings and the entered monthly contribution constant, then numerically solves for the smooth effective annual rate connecting that path to the target. A demanding result is a feasibility warning. It should prompt a review of the target, deadline, contribution, and assumptions rather than a search for an asset claimed to deliver the required rate.

An exact solve can be negative when the current savings and contributions overfund the target; that means positive growth is not required, not that a loss is forecast. If both starting savings and monthly contributions are zero, there is no funded path for a return-only solve. In the narrow case where the final month-end contribution alone already exceeds the target, no finite rate above the calculator's −100% boundary can hit the target exactly.

Consider someone aged 30 targeting age 45, with 100,000 already saved, a target of 1,000,000 in today's purchasing power, 3% assumed inflation, a 6% effective annual return, and a current contribution of 2,000 per month. Inflating the target for fifteen years produces a future nominal target of about 1,557,967.

Under the smooth 6% path, current savings and monthly contributions project to about 813,480, leaving a modeled shortfall near 744,488. Holding 6% constant requires roughly 4,595 per month. Holding the 2,000 contribution constant instead requires a smooth annual return near 12.43%. The second figure is not an investment suggestion; it shows that the present goal, deadline, and contribution depend on an unusually demanding return assumption.

A constant annual return smooths away volatility. This tool treats the entered return as a nominal effective annual rate and, when today's-money mode is selected, separately inflates the target. If a return assumption is already stated after inflation, either convert it to a consistent nominal assumption or keep the full model in real terms outside this tool; do not subtract inflation twice. Fees and taxes should also be deducted consistently or tested as separate reductions.

Contribution timing affects the path. The calculator models contributions at month end and converts the effective annual return to a monthly rate. A beginning-of-month contribution would receive one more month of growth. That difference is usually smaller than uncertainty around returns, but the timing convention should still be preserved when comparing another calculation.

Change one assumption at a time so the result remains interpretable. Test a larger target, a lower return, higher inflation, a smaller contribution, and a later or earlier deadline. Then consider a delayed contribution start or a temporary saving interruption. A plan with margin across several cases is more informative than one reverse solve produced by optimistic inputs.

The calculator uses a deterministic target and smooth accumulation path. It does not simulate sequence-of-returns risk, changing inflation, tax, investment fees, pensions, public benefits, longevity, healthcare shocks, currency movement, contribution breaks, spending flexibility, or minimum account-access ages. It cannot assess suitability or determine a safe withdrawal policy.

Reaching the displayed target is not proof that a plan is funded, and missing it is not proof that independence is impossible. The model should support a broader cash-flow plan, risk assessment, and review of applicable rules. Material retirement decisions may warrant qualified financial, tax, or legal advice.

The public educational sources below and this guide were reviewed on 20 July 2026. The arithmetic is stable, but personal inputs are not. Update spending from actual records, confirm current balances and contributions, and revisit taxes, fees, benefits, and jurisdiction-specific rules rather than rolling the review date forward without changing the evidence.

Review the plan at least annually and after a major change in household, work, health, housing, or expected spending. Preserve previous scenarios so a changed target can be explained by changed inputs. The SEC's Investor.gov calculators are useful independent references for compound-growth and savings-goal mechanics, but no public calculator can turn an assumed return into a guaranteed outcome.