Retire

Retirement Calculator

Details

How to use Retirement Calculator

What the tool does, how to run it, and what to expect from the result.

How to project a retirement balance

Enter what you have saved now, what you add each month, the annual return you expect, and how many years remain until you retire. The tool compounds the existing balance monthly and adds the contribution stream on top.

The two lines it returns, the projected balance and the total contributed, are worth reading together. The difference between them is the compounding, and on a 30-year horizon it is usually larger than everything you paid in.

  • Enter what you have already saved in the Current savings field. It starts at 20000.
  • Enter your monthly saving, employer match included, in the Monthly contribution field. It starts at 500.
  • Enter your expected annual return in the Annual return (%) field. It starts at 6.
  • Enter your horizon in the Years until retirement field. It starts at 30.
  • Read the Projected balance line, then re-run with the return reduced by your inflation assumption to see the figure in today's money.
Tips

Getting a better result out of Retirement Calculator

Specific settings and thresholds, not general advice.

  • The projection compounds current savings monthly and adds a monthly deposit stream: balance = current x (1 + r)^n + monthly x ((1 + r)^n - 1) / r, with r = annual return / 12. The defaults, 20000 plus 500 a month at 6% for 30 years, project to about 622700 from 200000 contributed.
  • This is arithmetic, not a retirement plan. It compounds one rate over one horizon and knows nothing about your tax treatment, your state pension or Social Security, your health costs, or when you actually stop working.
  • The output is nominal. At 2.5% inflation over 30 years, a 622700 balance buys what about 296900 buys today, and that gap is the single most misleading thing about any retirement projection, including this one.
  • There is no withdrawal side. The tool stops on the day you retire. The common rule of thumb is a 4% first-year withdrawal, which on 622700 is about 24900 a year.
  • Contributions are constant in this model. Real salaries rise, so indexing your contribution to inflation beats the projection, and leaving it flat means it quietly shrinks in real terms every year.
Limits

What Retirement Calculator does not do

The honest boundary, so you do not lose time finding it yourself.

  • Accumulation only. No withdrawal phase, no drawdown, no longevity modelling.
  • No inflation adjustment, no tax on contributions or withdrawals, and no employer match field.
  • A fixed return every single month. No market volatility and no sequence-of-returns risk.
  • No pension, Social Security, rental income, or any other income stream.
At a glance

Who Retirement Calculator is for

A quick way to understand who this helps, what it solves, and where it connects next.

Best fit

Shoppers, students, freelancers, and anyone who needs a quick, private calculation.

Ideal for

Fast everyday math without a spreadsheet, app install, or sign-up.

FAQ

Common questions

Short answers for the questions people usually have before trying a utility like this.

Is the retirement calculator free?

Yes. It is completely free to use, with no signup, no account, and no paywall.

How accurate are the results?

The calculator uses the standard formulas for this kind of math, but real-world results can differ once fees, rounding, rate changes, and provider-specific rules come into play. Treat the output as a planning estimate, not a quote.

Does it stay local?

Yes. The numbers you enter are processed entirely in your browser and never leave your device.

What will the projected balance actually be worth after inflation?

Considerably less. At 2.5% inflation over the default 30-year horizon, a 622700 nominal balance has the purchasing power of roughly 296900 today. To get a real answer directly, subtract your inflation assumption from the return rate and enter 3.5 instead of 6.

How much income does the projected balance support?

The tool does not say, because it models only the accumulation phase. A widely used starting point is a 4% first-year withdrawal adjusted for inflation thereafter, which on a 622700 balance is about 24900 in year one. That rule is a heuristic, not a guarantee.

Where do I enter my employer match?

Fold it into the monthly contribution. If you put in 500 and your employer adds 250, enter 750. There is no separate match field and no vesting logic.

How is this different from the 401(k) calculator on this site?

The 401(k) tool compounds annually and takes an annual contribution added at the end of each year, which is a more conservative model. This one compounds monthly on a monthly contribution. Given the same inputs, the monthly model produces a slightly higher balance.

Do my savings figures leave my device?

No. Every number is held in the page's local state and evaluated in your browser. Nothing is uploaded, and closing the tab discards it.

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