Retirement Calculator

Project your retirement nest egg from your current savings and contributions, and see the income it supports.

The method behind this calculator

This calculator compounds your current balance and monthly contributions forward to your retirement age, then applies the 4% rule to estimate the sustainable annual income that pot would provide.

The inflation line matters more than people expect. A million dollars in thirty years buys roughly what half a million buys today, which is why the calculator shows the figure in today’s money as well.

Step by step

  1. Enter your current age, target retirement age and current savings.
  2. Add your monthly contribution and expected return.
  3. Set an inflation rate to see the result in today’s money.

Formula reference

FV = current × (1+r)ᴺ + monthly × ((1+r)ᴺ − 1) ÷ r safe income ≈ balance × 4%

A worked example

Take the starting scenario, a years in retirement of 25. That gives a nest egg at retirement of $1,381,801.67. Underneath, Years to grow comes out at 30 years and Total contributed at $338,000. Change any field and every figure updates as you type.

Common questions

How much do I need to retire?
A common rule of thumb is 25 times your annual spending, which corresponds to the 4% withdrawal rate this calculator uses.
What return should I assume?
Historically a diversified stock-heavy portfolio has averaged around 7% after inflation over long periods, but past returns do not guarantee future ones.
Is the 4% rule reliable?
It is a planning guideline drawn from historical US data, not a guarantee. Sequence of returns and longevity both affect the real answer. This is not financial advice.