The Dividend Reinvestment Calculator helps users estimate how their investment could grow when dividends are automatically reinvested to purchase additional shares. It projects future portfolio value, total dividends earned, share growth, and the impact of regular contributions over a specified investment period.

Understanding the Retirement Savings Calculator

Retirement planning usually comes down to one uncomfortable question: will what I’m saving actually be enough? The Retirement Savings Calculator is built to answer that directly — not just with a single projected balance, but by translating that balance into an actual retirement income, comparing it to what you say you’ll need, and showing you how long your money is likely to last once you start drawing it down.

This guide covers what the calculator does, the questions it answers, how to read every part of your results, a full worked example, and answers to a few common questions.

What the calculator does

The calculator models two connected phases of retirement planning:

• The accumulation phase — from today until you retire, combining your current savings, ongoing contributions (with an optional annual increase), and your expected investment return.
• The retirement phase — from retirement until your life expectancy, modeling how your balance behaves as you withdraw income each year, based on the withdrawal rate you choose (3%, 4%, 5%, or a custom rate).

Along the way, it accounts for inflation, any other retirement income you expect (pension, Social Security, rental income), and gives you a plain-language readiness assessment — all calculated instantly in your browser.

Questions the calculator answers

• “How much will I have by the time I retire?” — your projected balance at retirement, and what that balance is really worth once inflation is factored in.
• “How much of that is my own money, versus growth?” — Total Contributions vs. Total Investment Growth, broken out separately.
• “How much income can my savings actually generate?” — translated into both an annual and monthly figure, based on your chosen withdrawal rate.
• “Will that be enough to live on?” — your Total Retirement Income (withdrawals plus any other income) is compared directly against your Desired Annual Retirement Income, producing a clear gap or surplus figure.
• “Am I on track, or do I need to change something?” — the Retirement Readiness indicator gives you a plain-language answer: Excellent, On Track, Needs Improvement, or High Risk.
• “Will I run out of money?” — the calculator simulates your retirement years and estimates how long your savings will actually last, rather than assuming they last forever.
• “What should I actually do about it?” — the AI recommendation translates all of the above into specific, numbers-backed suggestions.

How to read your results

After clicking Calculate, you’ll see a set of result cards, a readiness indicator, an AI recommendation, two charts, and a combined projection table.

• Projected Retirement Savings — your account balance at the moment you retire, before adjusting for inflation.
• Total Contributions — everything you contribute yourself between now and retirement (not counting your current savings).
• Total Investment Growth — how much of your final balance came from investment returns rather than your own contributions.
• Inflation-Adjusted Savings — what your projected balance is really worth in today’s dollars, if you entered an inflation rate.
• Annual / Monthly Retirement Income — the income your savings alone can generate, based on your chosen withdrawal rate (balance × withdrawal rate).
• Other Retirement Income — whatever you entered for pension, Social Security, or other passive income.
• Total Retirement Income — your withdrawal income plus other income combined — the realistic total you’d have to live on.
• Income Gap / Surplus — Desired Income minus Total Retirement Income. A positive number is a shortfall; if it’s negative, the calculator shows it as a surplus instead.
• Estimated Years Retirement Savings Will Last — either a specific number of years if the simulation shows your balance running out, or a note that it lasts through your full life expectancy and beyond.

The Readiness Indicator

A quick, color-coded read on where you stand, based on how your Total Retirement Income compares to your Desired Income:

• Excellent — your projected income comfortably exceeds your goal.
• On Track — you’re close, within about 10% of your target.
• Needs Improvement — a real but closable gap.
• High Risk — your projected income falls well short of what you said you’d need.

The AI Recommendation

Generated directly from your numbers, this can include: the exact contribution increase needed to close an income gap, the impact of delaying retirement by a few years, the benefit of adding an annual contribution increase, how much inflation is projected to erode your purchasing power, a reminder to review your investment strategy as retirement nears, a suggested spending adjustment if a gap exists, and an explanation of the tradeoffs behind your chosen withdrawal rate.

The two charts

• Retirement Growth Chart — your balance, contributions, and investment earnings from today through retirement, so you can see how much of your later growth comes from compounding rather than new contributions.
• Retirement Income Projection — shows your remaining balance declining over your retirement years alongside your annual withdrawal, which is the clearest way to see whether your money is on pace to outlast you or the other way around.

The Retirement Projection Table

One combined, sortable, searchable table spanning both phases of your plan — tagged Accumulation or Retirement for each row — showing Age, Beginning Balance, Contribution, Withdrawal, Investment Earnings, and Ending Balance. Exportable to CSV if you want to explore it further.

A real-world example

Say you’re 40 years old, planning to retire at 65, with a life expectancy of 90. You currently have $50,000 saved, contribute $400 a month, and expect a 6% annual return. You’d like $55,000 a year to live on in retirement, plan to withdraw at a 4% rate, expect 2.5% inflation, and anticipate $18,000 a year from Social Security.

Here’s what the calculator shows:

Metric	Value
Years Until Retirement	25
Projected Retirement Savings	$485,109
Total Contributions	$120,000
Total Investment Growth	$315,109
Inflation-Adjusted Savings	$261,663
Annual Retirement Income (4% withdrawal)	$19,404
Monthly Retirement Income	$1,617
Other Retirement Income	$18,000
Total Retirement Income	$37,404
Income Gap	$17,596 short of goal
Fund Longevity	Lasts through life expectancy and beyond
Readiness	Needs Improvement

What this example makes concrete:

• Of the $485,109 projected balance, only $120,000 came from this person’s own pocket — $315,109, nearly two-thirds of the total, came from investment growth alone.
• A 4% withdrawal rate on that balance generates about $19,404 a year — combined with $18,000 in Social Security, that’s $37,404 a year total, which is $17,596 short of the $55,000 goal.
• Because the withdrawal rate (4%) is comfortably below the expected return (6%), the balance is actually projected to keep growing even in retirement, so it’s not at risk of running out — the shortfall here is an income problem, not a longevity problem.
• The AI recommendation, in a case like this, would likely suggest a specific monthly contribution increase to close that $17,596 annual gap, or the effect of delaying retirement by a few years to build up a larger balance.

Frequently asked questions

1. Why does the calculator say my income gap is a problem if it also says my savings will last through my whole life expectancy? These measure two different things. The income gap compares what your withdrawals (plus other income) generate each year against what you want to spend — it’s a measure of comfort, not survival. Fund longevity measures whether your balance actually runs out, which depends on whether your withdrawal rate exceeds your investment return. It’s entirely possible — as in the example above — to have an income shortfall relative to your goal while your underlying balance keeps growing, because you’re withdrawing conservatively relative to your returns.

2. Which withdrawal rate should I choose — 3%, 4%, or 5%? There’s no universally correct answer; it’s a tradeoff between how much income you want now and how much risk you’re willing to take that your savings run out. A 3% rate is more conservative and historically has a lower risk of depleting savings over a long retirement, but it requires a larger balance to produce the same income as a higher rate. A 5% rate produces more income per dollar saved but increases the risk of running out earlier, especially if investment returns are lower than expected in the early years of retirement. The custom option lets you test any rate specific to your own risk tolerance.

3. Why is my Total Investment Growth so much larger than my Total Contributions? This is compounding doing what it does best over a long time horizon — investment earnings don’t just apply to your original contributions, they apply to every dollar of prior growth too. The longer your accumulation period, the more pronounced this effect becomes, which is part of why starting to save earlier tends to matter more than the exact size of any single contribution.

4. Does the calculator account for taxes on my retirement withdrawals? No — per the calculator’s stated assumptions, taxes, investment fees, and unexpected expenses aren’t included unless you build them into your own inputs (for example, by lowering your expected return slightly to account for fees, or increasing your desired income to cover an estimated tax bill). This keeps the underlying math transparent, but it also means your real after-tax, after-fee income in retirement may be somewhat lower than what’s shown here.