Coast FIRE: When Can You Stop Saving?

You can stop saving for financial independence when the portfolio already invested is modeled to reach the target at your chosen work-exit age without another contribution. That is the narrow Coast FIRE decision. It is not permission to stop earning today, and it is not proof that markets will follow the model.

The other half of the decision is immediate: income still has to cover current spending, taxes, healthcare, and any debt payments while the portfolio is left alone. Coast FIRE changes where new savings go. It does not make the present-day budget disappear.

Run the contribution-to-zero test

Use the FIRE Number and Timeline Planner with annual contributions set to zero. Enter the portfolio already invested, current age, working and coast dates, retirement date, early- and later-retirement spending, account balances, chosen access ages and effective rates, a real-return assumption, a withdrawal-rate assumption, and any durable income that begins later. Then read the phase timeline and retirement result that match the decision in front of you.

The planner separates working and coast contribution phases, early- and later-retirement spending phases, and two durable-income streams with start ages. The planner identifies taxable, tax-deferred, and tax-free buckets, applies a user-chosen effective withdrawal rate to each, and enforces each entered access age. Those assumptions are sensitivity inputs, not tax-law calculations. It supports both a constant-real-return path and historical cohorts from the same disclosed monthly record used by the Sequence Risk Lab. It does not calculate tax brackets, deductions, basis, penalties, conversion clocks, SEPP payments, required distributions, account-specific legal rules, or tax returns.

A computed example, not a promise

The useful fact is not that this household is “Coast.” The useful fact is that changing any input can change the answer. Lower real growth, higher spending, later durable income, or a lower withdrawal-rate assumption can move the line. The model gives the decision a shape; it does not settle the future.

Check what the label hides

First, ask whether the portfolio is actually available for the job assigned to it. Account access before ordinary retirement-account ages can have tax and penalty consequences. Those mechanics belong in a separate drawdown plan.

Second, separate a durable reduction in saving from a temporary pause. A pause can be sensible when cash is needed for childcare, debt, a move, or a business. Calling it Coast FIRE adds nothing unless the long-range result has been tested.

Third, inspect concentration and fees. The constant-return lens takes a real-return assumption, while the historical lens takes one supported stock-and-bond mix for all accounts; neither inspects the holdings or fees expected to produce the result. A projected coast balance built on one stock, an expensive portfolio, or an asset mix you would abandon during a decline deserves less confidence than the clean number suggests.

Stress the years after work ends

Coasting happens before withdrawals. The harder test begins when withdrawals start. Open the Sequence Risk Lab with the portfolio expected at the work-exit date and the initial withdrawal rate implied by annual spending. The lab starts the same scenario in every January supported by the disclosed monthly record, applies observed stock, bond, and inflation returns, and reports complete and truncated cohorts separately. Early losses can matter even when a long-run average looks acceptable.

The lab is deliberately narrower than a financial plan. Its five scenario inputs are starting portfolio, stock-and-bond mix, retirement horizon, withdrawal rule, and initial annual withdrawal rate. Its choices span all-stock through all-bond mixes, fixed-real, fixed-percentage, and guardrail withdrawals, and the listed long retirement horizons. It has no dollar-spending, income, income-duration, fee, tax, account-location, healthcare-phase, or employment-contract input. Use it to attack one assumption, not to issue yourself a certificate.

What a yes should change

A Coast FIRE result can support a smaller contribution, a job with less pay and more control, time for caregiving, or more room in the current budget. Galen's recorded position is FI, not retirement as the finish line. The useful question is therefore not “How soon can work disappear?” It is “What does this financial margin let me choose now?”

Write down the choice before changing the contribution. If the answer is only a label, keep saving. If the answer is specific—and the zero-contribution case still holds under a less friendly assumption—you have a decision worth considering.

Return to the FIRE decisions index, or compare the partial-income path in the Barista FIRE guide.