Financial calculators

Retirement savings calculator

Project savings to a chosen retirement age and compare purchasing power with your own savings target.

Calculated on your device

Current age

Whole ages define the saving horizon; this tool does not infer a date of birth.

Target retirement age

Choose a later age, no more than 50 years after your current age.

Current savings

Monthly contribution

Target savings in today’s money

Enter your own total savings target in today’s purchasing power.

Currency

Find a currency

Currency sets the money unit. It does not convert exchange rates.

Return and inflation assumptions

These are illustrative, constant assumptions. Set your own scenario values.

Assumed effective annual return (%)

Effective annual return held constant. Negative assumptions model losses.

Assumed annual inflation (%)

Held constant to compare future amounts with today’s purchasing power.

Starting values are an example. This scenario uses fixed end-of-month contributions and does not assess whether you can retire.

Projected savings at retirement: —
Projected savings in today’s money: —
Total monthly contribution needed for your target: —
Your target in future money: —
Projected shortfall in future money: —

Calculate to compare the monthly contribution that would meet your entered target.

Calculate to see your result.

Your saving horizon and target

Your entered target in today’s money
Projected balance in today’s money
Your current monthly contribution
Increase above your current contribution

The target comparison uses today’s purchasing power for both amounts. The bar stops at 100%; the text still reports any modeled surplus. Meeting an entered target does not establish retirement adequacy.

Explore every year and age

Jump to years

Annual saving checkpoints, including your starting balance
Year	Age	Future amount	Today’s purchasing power

Ten years per view; the CSV includes every checkpoint and all input assumptions. Year 0 is your starting point. Display follows currency precision; tiny nonzero amounts use scientific notation, including in the CSV. Other CSV amounts use six decimal places. Very large estimates have limited numerical precision and may export in scientific notation.

Defaults are illustrative assumptions, not recommended rates, retirement ages or savings targets. Currency formats only.

Compare your retirement saving scenario

Choose current and retirement ages to define a 1–50-year saving horizon.
Enter existing savings and fixed end-of-month contributions.
Enter assumed effective annual return and inflation.
Set your own total savings target in today’s purchasing power. Review the projected gap and total monthly contribution needed under those assumptions.

What is calculated

Monthly return i = (1 + annual return ÷ 100)^1/12 − 1. With n months, starting savings P and monthly contribution C, future savings = P × (1 + i)ⁿ + C × [(1 + i)ⁿ − 1] ÷ i. At 0% return, it is P + C × n. Contributions arrive at the end of each month.

Inflation factor = (1 + inflation ÷ 100)^years. Today’s purchasing power divides the projected future balance by this factor; your target in future money multiplies the entered target by it. Required monthly contribution solves the same growth equation for C, floored at zero when existing savings alone cover the target. This is the total monthly contribution, not an extra amount above what you entered.

Investor.gov’s compound calculator describes starting savings, monthly contributions and assumed growth; its purchasing-power definition explains the inflation distinction. The formula uses our stated end-month and effective-rate convention.

Worked example

Age 30 to 31, current savings 1,200, monthly contribution 100, zero return and zero inflation produces 2,400. A 2,400 target needs 100 per month. With assumed 10% inflation, that same target becomes 2,640 future units, needing 120 monthly at zero return.

Assumptions and limits

Fixed return, inflation and contributions until retirement; no market volatility, fees, taxes, pensions, employer matches, salary growth or withdrawals. This projects accumulation only. It does not estimate retirement spending, longevity, safe withdrawals or whether a balance is sufficient to retire. Choose and review your own target; actual returns and inflation vary.

Ages are whole numbers: current 0–100, retirement 1–110, with a positive horizon no longer than 50 years. Current savings 0–1 trillion units; monthly contribution 0–1 billion; effective annual return −90% to 100%; inflation −5% to 50%; target 0.01–1 trillion in today’s units. Numeric limits are not recommendations. Outputs are estimates, not advice or guarantees.

Privacy and export

Inputs remain in browser memory without uploads or saved financial data. CSV gives year-by-year age, projected nominal balance and today’s purchasing power, including the starting point. CSV includes every input assumption and target calculation. Values export to six decimals, with scientific notation for tiny nonzero values; display follows currency precision. Reset restores defaults. Undo recovers your inputs, currency search and selected yearly range after Reset or trying the target contribution, including after recalculation. Editing discards the saved recovery snapshot. The target contribution action rounds upward to the currency’s minor unit and is unavailable above the supported monthly limit.

Does zero shortfall mean I can retire?

No. It only means the modeled balance meets the target you entered. Spending, health, taxes, investment risk and lifespan require separate planning.

What if returns are negative?

You can enter a negative assumed return. Savings may shrink and the modeled monthly amount needed can rise. The smooth projection does not capture the order of real market gains and losses.