Calculator details
Enter your values below. Use the information icon beside any field for guidance.
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Use the information icons beside each input to see exactly what the field means and what value to enter.
Your results
Estimated results based on the values and assumptions you entered.
Estimate
Calculator-specific details based on your current inputs
Formula & calculation method
Projected balance uses compound growth plus monthly contributions.
Formula version 3.0 · Intermediate calculations use full precision; displayed values are rounded for readability.
Project retirement savings from current balance, contributions, return and inflation assumptions to test whether the trajectory is plausible.
What this calculator helps you decide
Run several return and contribution scenarios and focus on the gap between the projected balance and your goal. Increasing savings earlier can have more effect than trying to compensate late.
Long-range retirement calculator results should be read as scenarios rather than promises. Fees, taxes, changing contribution rates and uneven investment returns can all alter the eventual balance.
Start with the right inputs
Use Current retirement savings, Monthly contribution, Expected annual return, Years until retirement, Inflation rate, and Planned withdrawal rate as the working assumptions. The calculator returns Projected Balance, Contributions, Growth, Real Value, Estimated Annual Income, and Estimated Monthly Income. Enter figures from the same point in time and use one currency throughout; mixing an old balance with a new rate or a monthly figure with an annual figure can make an otherwise correct formula answer the wrong question.
For retirement savings calculator, make the inputs represent one coherent scenario. If you are comparing two alternatives, change one major variable at a time and keep the rest constant so the reason for the difference remains visible.
Behind the calculation
Calculation used: Projected balance uses compound growth plus monthly contributions.
The formula converts the entered assumptions into the outputs shown above. For retirement calculator, the important point is to keep the rate, time unit and cash-flow timing consistent with the formula rather than treating the displayed percentage or payment as a standalone fact.
What the output is telling you
The retirement calculator combines a growth projection with account rules, and those two layers should not be confused. A balance projection can be mathematically sound even when a planned contribution would exceed personal eligibility or available room.
This is an accumulation model, not a complete retirement-income plan; taxes, withdrawal rates, longevity and sequence risk require separate analysis.
Stress-test the assumptions
What the calculator does not know
With retirement calculator, headline annual limits are reference points rather than automatic personal allowances. Age, income, employer contributions, carry-forward provisions or plan rules may change the amount that applies to an individual.
This is an accumulation model, not a complete retirement-income plan; taxes, withdrawal rates, longevity and sequence risk require separate analysis. Keep provider statements, tax rules, account rules or legal disclosures as the final authority whenever they apply.
Before you rely on the retirement calculator result
Check three things before acting on this result. Confirm that the starting figures belong to the same scenario; project retirement savings from current balance, contributions, return and inflation assumptions to test whether the trajectory is plausible. Next, identify the one assumption you are actually testing instead of moving every field until the answer feels comfortable. Finally, compare the output with the practical constraint outside the calculator—available cash, required payment, contribution room, time horizon, provider terms or another limit that the formula cannot choose for you. This is an accumulation model, not a complete retirement-income plan; taxes, withdrawal rates, longevity and sequence risk require separate analysis.
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Authoritative references
Questions specific to retirement calculator
What decision should this result support?
Run several return and contribution scenarios and focus on the gap between the projected balance and your goal. Increasing savings earlier can have more effect than trying to compensate late.
What can make the real-world number different?
This is an accumulation model, not a complete retirement-income plan; taxes, withdrawal rates, longevity and sequence risk require separate analysis.
What is the safest way to use the estimate?
Use the Retirement Calculator to compare plausible scenarios, then verify the external inputs that control the decision. For this calculation, the most important discipline is to keep the inputs internally consistent and to avoid treating an assumed rate, future value or provider rule as guaranteed.