Retirement Savings Calculator

What the retirement savings calculator does

The retirement savings calculator projects how large a nest egg could grow by retirement and estimates the safe annual income it could provide: how much you will have, and how much you can comfortably spend from it once you stop working. It combines your starting point, your regular saving and an assumed return into one projection, then turns the result into an income figure.

How your nest egg grows

Your current savings compound at your assumed return over the years until retirement. Your regular contributions, the amount you add each month, are invested as you go and compound in turn.

Early contributions have the longest time to grow, so they contribute disproportionately to the final balance, while later ones add steadily on top. Over a long horizon, consistent saving and compounding returns can build a far larger balance than the sum of the contributions alone.

Starting early

Because returns compound, money invested early works for you across many more years than money invested late. Someone who starts saving modest amounts early can end up with more than someone who starts later with larger amounts. Adjust the years until retirement and watch the projected balance respond.

Turning savings into income

The calculator estimates a safe annual income by applying a sustainable withdrawal rate to the projected balance. The rate is meant to let you spend at a pace the balance can support across a long retirement without running out. Real returns and spending vary, so it is a benchmark, not a guarantee.

The inputs

• Current savings are your starting base, which has the longest time to grow.
• Monthly contributions compound over time.
• Small differences in the assumed return compound into large ones over decades.
• More years to retirement means more compounding.
• The withdrawal rate sets how much of the balance you draw as income.

Because these interact, test a range of assumptions instead of relying on one hopeful scenario.

Making the projection realistic

An optimistic return assumption can flatter the projection and lead you to save too little; a cautious estimate builds in a margin of safety.

Inflation gradually erodes what money can buy, so a balance that looks large in today's terms may support less than it appears decades from now. Keep this in mind when reading the income estimate.

If the income falls short

• Increase your monthly contributions, even a little.
• Start or continue as early as possible to benefit from compounding.
• Review your investment approach and its long-term return against the risk.
• Keep fees low, since they erode growth over time.

Small, consistent improvements made early tend to have the biggest impact.

How much is enough?

That depends on the lifestyle you want and how long your retirement lasts. A modest retirement needs less than an ambitious one, and a longer retirement needs a larger balance.

Work backwards from the income you want: adjust your contributions and time horizon until the estimated income matches your goal. That ties the target to your own plans instead of a generic benchmark.

Keeping the plan on track

Your income, expenses, goals and the returns markets deliver all shift over time, so revisit the calculator periodically. Catching a shortfall early gives you the most options, since small adjustments made years before retirement have time to compound.

The projection rests on assumptions real life will not follow precisely. For decisions about your retirement, confirm the figures with a licensed financial adviser who can consider your full situation.

This is general information only and not financial advice.

About This Retirement Savings Calculator

Use this retirement savings calculator to get an instant, accurate estimate. The figures follow official guidance and every rate and threshold is kept up to date for 2026. Adjust the inputs above to match your situation, or browse all our calculators to plan your next step.