How long your savings will last

This calculator uses current savings, a fixed annual withdrawal and a constant assumed annual return to estimate a duration. At a zero return it divides savings by the annual withdrawal. At a positive return, when starting savings multiplied by the assumed return is at least the withdrawal, it displays "Indefinitely". That is a mathematical branch under fixed inputs, not a promise that money will last forever.

Use the result to describe one hypothetical annual model. It is not a monthly bill calendar, a retirement recommendation or a probability of success. A longer estimate does not establish that a withdrawal is affordable or that an investment is suitable.

Start with the zero-return case

If the assumed annual return is zero and the annual withdrawal is positive, the duration is savings ÷ annual withdrawal. An illustrative $100,000 starting balance and $10,000 annual withdrawal produce 10.0 years. This simple division does not include investment changes or increases in spending.

The unit matters. The input asks for an annual withdrawal. A $1,000 monthly spending figure is not the same as a $1,000 annual withdrawal. Before entering an amount, identify the unit and the question you are trying to model. The tool does not verify a household budget or determine an amount for you.

A duration estimate is also not a date on which a real account will run out. Actual withdrawals can occur throughout a year, and income, spending and returns can change. Keep the modeled years separate from actual payment and bill dates.

Read the finite-return formula as an annual model

For a positive withdrawal outside the positive-return "Indefinitely" branch, the served calculation is -log(1 - savings × return / withdrawal) ÷ log(1 + return), with return entered as an annual decimal. At zero return it uses the separate division branch rather than this expression.

For example, $100,000 in savings, a $10,000 annual withdrawal and a constant 5% assumed annual return produce about 14.2 years in the displayed model. The same savings and withdrawal at zero return produce 10.0 years. These examples isolate an assumption; they do not predict an account path.

The expression is consistent with an annual growth-then-withdrawal recurrence for complete annual steps. Its fractional-year result is a mathematical extension of that model, not a day-by-day forecast. The tool displays one decimal place for a positive computed duration. A small input change may therefore be hidden by display rounding.

Know why the output says "Indefinitely"

The positive-return branch checks savings × assumed annual return ≥ annual withdrawal before calculating a finite duration. Equality also goes to "Indefinitely". For illustrative $100,000 savings and a 5% constant return, an annual withdrawal of $5,000 meets that equality check.

The word describes this model's constant-input condition. It does not check whether the assumed return will occur, whether spending will rise or whether costs or taxes change what is available. The tool does not calculate a probability that the condition will continue.

Keep the exact inputs beside an indefinite result. In particular, label the return as assumed, not confirmed income. Do not translate the display into a recommendation to withdraw that amount or a statement that a household is financially secure.

Keep an annual model apart from a cash-flow calendar

The CFPB cash-flow budget tool tracks when income and expenses occur. That is a different task from a constant annual duration estimate. A tool that returns years does not show which bill is due before the next receipt.

The CFPB monthly budget worksheet separately lists monthly income and spending. If you use a budget figure while preparing a hypothetical annual withdrawal, preserve its units and supporting records. This companion does not convert a budget into an approved withdrawal plan.

Save a private worksheet with six fields: scenario and date; starting savings; annual withdrawal and its unit; assumed annual return; displayed years or "Indefinitely"; and the model exclusions plus the unanswered decision. Add another row that changes one assumption while keeping the other inputs the same.

Treat limits and unexpected inputs honestly

The calculation excludes taxes, fees, inflation, changing spending, new deposits and variable returns. It also does not model a sequence of different annual returns. A constant rate cannot stand in for a market path with changing gains and losses. The related market-drop article addresses a different question from this fixed-rate estimate.

The current served script asks for a positive annual withdrawal and otherwise returns an entry prompt. Unlike a financial plan, it does not fully validate all economic or mathematical input cases. Inputs that make the logarithm undefined, unusual negative amounts or nonfinite calculations are not evidence of a meaningful zero-year answer. For this worksheet, use nonnegative savings, a positive withdrawal and an assumed return above -100%, then label the scenario as hypothetical. This is an interpretation boundary, not a change to the live form or its code.

Do not use unsupported input cases to make a personal decision. Record what you entered and seek a separate review if the display does not answer the question you intended. The companion update preserves the tool exactly; it does not claim to fix validation.

State the decision the tool cannot make

The retirement savings growth calculator estimates accumulation under different inputs. This page's distinct question is when a fixed-withdrawal duration model returns a finite value or an indefinite branch. Neither tool decides what a household should spend or how to invest.

If you want professional help, ask for a written scope that explains which spending records, assumptions, exclusions and changing scenarios the professional will review. Ask for costs and the work product rather than treating a calculator screenshot as a plan. Keep statements and account details private. A Valora inquiry requests information for a response; it does not book an appointment or arrange an advisor introduction.