Retirement Savings Calculator
Enter your current retirement savings, how much you and your employer contribute each month, an expected annual return, and how many years until retirement to see your projected balance, how much of it came from growth, and what it's worth in today's dollars. Set a savings goal and the calculator will tell you the monthly contribution needed to reach it.
Results
| Projected balance at retirement | - |
|---|---|
| In today's dollars (inflation-adjusted) | - |
| Total contributed (incl. employer match) | - |
| Total investment growth | - |
Contributions vs. growth over time
Year-by-year projection
| Year | Contributions to date | Growth to date | Projected balance | Today's dollars |
|---|
Understanding your retirement projection
A retirement projection answers a simple question: if you keep saving at roughly the pace you save now, how much will you have when you stop working? The calculator takes four things you control or can estimate (what you have saved today, what you add each month, what return you expect, and how many years remain) and compounds them forward month by month. The result is not a prediction, it is a model of what steady saving and steady growth would produce. Its power is making the two forces most people underestimate, compounding and time, visible as numbers you can change and watch respond.
How compounding monthly contributions builds a balance
Every month the model does two things. First it applies one month of growth to the balance you already hold, using your annual return divided by twelve. Then it adds your fresh contribution. Next month it repeats, but now the growth applies to a larger base, including last month's growth. That is compounding: returns earning returns. Because growth is always calculated on the balance as it currently stands, the dollar amount of growth climbs every year even though your monthly contribution never changes. Early on, almost everything in the account is money you put there. Later, growth can quietly overtake your contributions and become the larger share, which is exactly what the contributions-versus-growth chart on this page is built to show.
Why starting early dominates everything else
The single most valuable input in any projection is the number of years. A dollar invested at 25 has roughly forty years to compound before a typical retirement; a dollar invested at 45 has about twenty. At a 7% return money doubles roughly every decade, so that early dollar can double two extra times, becoming several times what the later dollar does, despite being the very same dollar. This is the idea behind the phrase time in the market: how long your money compounds usually matters more than the exact amount you contribute or the return you earn. It is why someone who saves modestly but starts in their twenties often finishes ahead of someone who saves aggressively but waits until their forties. You cannot buy back lost years, so starting small beats waiting for the perfect budget.
Employer match: do not leave free money behind
Many workplace plans add money to your account for every dollar you contribute, up to a cap, often fifty cents or a dollar on each dollar, up to a few percent of your salary. That is an immediate, guaranteed return before the market does anything at all. Enter the matched amount in the employer match field as a flat dollar figure per month and the calculator adds it straight to your own contribution, so every projection, chart point, and goal calculation reflects the full amount flowing into the account. Watching the match compound over decades makes the stakes obvious: declining a match you are entitled to is one of the most expensive habits in personal finance, because you forfeit both the free money and all the growth it would have earned.
Inflation and why today's-dollars value matters
A balance of half a million dollars sounds like a lot, but if it arrives in thirty years it will not buy what half a million buys today, because prices rise. The inflation input discounts the projected balance back into today's dollars, the figure shown on the "in today's dollars" line. The nominal number is what your statement will eventually read; the real, inflation-adjusted number is closer to what the balance will feel like to spend. Planning in real terms keeps you honest, since a large nominal figure can mask modest purchasing power.
Goal-based saving: solving for the contribution you need
Most people approach retirement from the wrong end, saving whatever is left over and hoping it adds up. The goal input flips that. Enter a target balance and the calculator works the compounding math backwards to find the total monthly contribution (your own plus any match) that would land you on target in the years you have. It then tells you whether your current pace gets you there or how much more per month you would need, turning a vague worry into a concrete plan.
A worked example
Load the page with its defaults and you are modeling a realistic mid-career saver: $20,000 already invested, $500 added every month, a 7% expected annual return, and 25 years until retirement. Compounded monthly, that grows to roughly $520,000. Here is the striking part. Over 25 years you contribute about $150,000, which with your $20,000 starting balance means you put in roughly $170,000 of your own money. The remaining $350,000 or so is pure investment growth: more than twice what you contributed, created entirely by compounding. Try raising the contribution, adding an employer match of even $150 a month, or extending the horizon by five years, and watch the balance jump. Each lever teaches the same lesson: time and consistency do most of the heavy lifting.
Common mistakes to avoid
- Not capturing the full employer match. Contributing too little to earn every matched dollar leaves guaranteed money on the table. Contribute at least enough to get all of it before prioritizing anything else.
- Ignoring inflation. Judging a goal by its nominal size overstates what it will buy. Check the today's-dollars figure so your target reflects real purchasing power.
- Starting late. Waiting even a few years forfeits some of your most powerful compounding periods. Begin with whatever you can rather than holding out for the ideal amount.
- Assuming smooth returns. This model grows your balance by the same rate every year, but real markets rise and fall unevenly, sometimes sharply right before retirement. Treat it as an average-case sketch, not a promise.
- Forgetting taxes on traditional accounts. Money in a traditional 401(k) or IRA is taxed on withdrawal, so the spendable amount is less than the balance shown. Roth accounts differ, and the projection models neither.
Frequently asked questions
Does the employer match get invested and compound too?
Yes. The calculator adds your employer match to your own monthly contribution and compounds the combined amount at your expected return, so the match grows alongside your money. That is why entering even a modest match can lift the projected balance substantially over a long career.
What is the difference between the nominal and today's-dollars figures?
The nominal balance is the raw projected dollar amount at retirement. The today's-dollars figure discounts it by your assumed inflation rate to reflect real purchasing power. The nominal number is what your statement reads; the real number is closer to what it will feel like to spend. Set the inflation input to compare them.
How does the savings goal feature work?
Enter a target balance and the calculator solves the compounding math in reverse to find the total monthly contribution needed to reach it in your remaining years. It then tells you whether your current pace meets the goal or how much more per month you would need. Adjust any input and the figure updates instantly.
What return rate should I assume?
There is no single correct figure, which is why it is an input you set. The 7% default is a common long-run assumption for a diversified stock-heavy portfolio before inflation, but future returns are unknown and vary widely. Try a range of rates and lean conservative for a margin of safety.
Is this projection a guarantee of my retirement income?
No. It is a simplified educational model that assumes steady contributions and smooth, constant returns. It ignores taxes, investment fees, market ups and downs, Social Security, and other income. Use it to build intuition about how savings rate and time horizon drive your balance, then consult a qualified financial professional.