Retirement Savings Goal Calculator United States

Enter the nest egg you are aiming for, what you have already saved, how many years remain and the return you expect, and this retirement savings goal calculator shows how much you need to set aside each month to reach it.

How the calculation works

First the tool grows your current savings. Your existing balance is compounded monthly at your expected annual return for every month until retirement, giving what that money becomes on its own. Over decades this is usually much larger than the starting balance.

Then it fills the gap. The amount by which the projected balance falls short of your target is what new contributions must cover. The calculator solves the future-value-of-an-annuity formula for the fixed monthly deposit whose accumulated value, compounded at the same monthly rate, equals that shortfall. The result is the level amount to save every month from now until you retire. Both stages use the same monthly rate, so money already invested and money you are about to invest are treated the same way.

Why a head start matters

How much you have already saved, and how long it has to grow, often affects the result more than the monthly amount. The current balance compounds untouched, so a modest sum invested early can become a large share of the target. Extending the horizon or raising the starting balance cuts the required monthly saving sharply.

The same effect makes waiting expensive. A saver who delays five years loses those five years of deposits and also the decades of growth they would have earned. The first dollars you invest usually do more work than the last ones added near retirement, so put more in early when your budget allows.

A worked example

Suppose you want a $1,000,000 nest egg in 30 years, you have $50,000 saved, and you expect a 6 percent annual return. Compounded monthly, the 50,000 grows to roughly $301,000 on its own over 30 years, leaving a gap of about $699,000. Spread across 360 months of contributions earning the same 6 percent, the monthly deposit needed is about $696. At 7 percent, or with ten more years, the monthly figure falls; for the same target in 15 years it climbs steeply.

Run the same target at a hopeful return and a cautious one. In the example, dropping the assumption from 6 to 5 percent raises the monthly figure by well over $100, because your existing balance grows more slowly and your new contributions have to do more. The difference shows how much of your plan depends on market returns.

How to read your monthly number

The result is the same deposit every month for the whole horizon. Few people save that evenly. Many start below the figure and raise contributions as their income grows, or use bonuses and tax refunds to catch up. Use the monthly number as a benchmark for your actual saving.

If it looks out of reach, you can extend the timeline, lower the target, or make sure you capture an employer 401(k) match. A match works like an instant return on your contribution and is not modeled here, so your own out-of-pocket saving may be lower than the tool shows.

Common mistakes

The most frequent error is setting the target in today's dollars and forgetting that prices will rise. A million dollars will buy noticeably less in 30 years, so a target that feels ample now may fall short. Another is assuming an optimistic return and treating the low monthly figure that results as a plan when it is a best case. A third is ignoring the order of returns: markets do not deliver a smooth 6 percent every year, and weak years near retirement can hurt more than the average implies.

Assumptions and limitations

The calculator assumes a constant return every month, contributions at the end of each month, and no taxes, fees or withdrawals. It works in today's dollars without adjusting for inflation. It does not account for Social Security, pensions, employer matches or the tax treatment of different account types, all of which change how much you need to save. Treat the monthly figure as a planning baseline, not a guarantee, and revisit it as your balance, timeline and expectations change.

About This Retirement Savings Goal Calculator

Use this retirement savings goal calculator to get an instant estimate based on the figures you enter. Adjust the inputs above to match your situation, or browse all our calculators to plan your next step.