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Retirement Savings Calculator

Project retirement savings growth from current balance, monthly contributions, employer money, annual contribution increases, and inflation.

Finance planning estimate

Topic review: James Whitfield

Retired Financial Planner. Assigned as the finance topic reviewer for mortgage, retirement, annuity, pension, and long-term planning calculators.

Reviewed 17 May 2026 Updated 17 May 2026 View reviewer profile Contact editorial team
Retirement savings projector Project how your current savings, monthly contributions, employer money, and planned contribution increases can grow over time, then translate the result into rough retirement-income guideposts at 3%, 4%, and 5% starting withdrawal rates.

Display currency

Switch the currency used for balances, contributions, employer money, and income guideposts before entering money amounts.

Quick scenarios

Planning assumptions This page focuses on accumulation only. It does not include taxes, Social Security, pensions, or inflation-adjusted spending targets, so use the balance and income guide as a first-pass retirement savings estimate rather than a full retirement-income plan.

Result

$915,527.91

Projected retirement balance after 25 years of saving and compound growth.

In today’s purchasing power at 2.5% inflation, that is roughly $493,827.14.

Retirement-income guide At a 4% starting withdrawal rate, this balance could support about $3,051.76 a month or $36,621.12 a year before taxes. Use the 3% row as a more conservative starting point and the 5% row as a higher-risk planning range. In today’s money, the 4% monthly guide is about $1,646.09.
Total account funding
$299,836.34
Employer money
$57,654.54
Investment growth
$615,691.57
Growth share
67.25%
Extra $100/mo impact
$96,808.77
Final monthly contribution
$804.22

Withdrawal guide

What this pot might support at retirement start

Starting withdrawal rateMonthly incomeAnnual income
3%$2,288.82$27,465.84
4%$3,051.76$36,621.12
5%$3,814.70$45,776.40

These income figures are rough starting rules of thumb. Real retirement income depends on taxes, inflation, portfolio fees, account mix, and market sequence risk after retirement begins.

Balance mix

How much comes from saving versus growth

Your own contributions
$242,181.80
Employer or plan contributions
$57,654.54
Investment growth
$615,691.57 · 67.25%

Over long horizons, compounding usually does most of the heavy lifting. With the current inputs, account funding represents 32.75% of the final balance, and adding another $100 each month could raise the final balance by about $96,808.77.

Savings growth

Contributions vs investment growth over time

Checkpoint table

Milestones on the path to retirement

YearBalanceContributedEmployerGrowth
1$61,669.68$57,800.00$1,800.00$3,869.68
5$119,182.15$90,591.51$9,367.27$28,590.63
10$222,283.70$135,407.82$19,709.50$86,875.88
15$373,993.50$184,888.65$31,128.15$189,104.85
20$595,189.27$239,519.48$43,735.27$355,669.78
25$915,527.91$299,836.34$57,654.54$615,691.57
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Retirement Planning

Retirement savings calculator: project how compound growth turns contributions into a

Find out how your current savings and regular monthly contributions could grow over time with compound interest. This retirement savings calculator projects a future portfolio balance, breaks out how much comes from your own contributions versus investment growth, translates that balance into rough 3%, 4%, and 5% withdrawal-rate income ranges, and gives you a concrete number to compare against your retirement spending goals.

What a retirement savings calculator does

A retirement savings calculator takes four core inputs — your current savings balance, a monthly contribution amount, an expected annual rate of return, and the number of years until you plan to retire — and projects the future value of that combined saving and investment behaviour. The output is a single projected retirement balance that tells you roughly how much money could be waiting for you at retirement if conditions hold steady.

The value of the projection lies in its simplicity. By isolating the savings-growth question from taxes, pensions, Social Security, and withdrawal strategies, you get a clean answer to the most fundamental retirement question: given what I am saving and how long I have, how large could my portfolio grow? That number becomes the starting point for more detailed planning with tools that model spending, drawdown, and income sources.

Most financial planners recommend using a retirement savings projection as the first step in a broader planning process. Once you know the likely size of your future portfolio, you can compare it against a spending target, identify any shortfall, and adjust your savings rate, investment allocation, or retirement timeline accordingly.

A stronger version of this calculation does not stop at the pot size alone. It also asks what that pot might mean as starting retirement income. That is why this page pairs the projected balance with 3%, 4%, and 5% withdrawal-rate guideposts. Those ranges are not guarantees, but they give you a more practical bridge between an abstract nest egg number and an income planning conversation.

How compound interest drives retirement savings growth

Compound interest is the mechanism that turns modest regular contributions into a substantial retirement balance. Unlike simple interest, which is calculated only on the original principal, compound interest calculates returns on both the principal and all previously accumulated interest. Over a multi-decade retirement savings horizon, this compounding effect becomes the dominant driver of portfolio growth.

The formula used in this calculator is the standard future value of a growing account with regular additions: FV = PV × (1 + r)^t + PMT × [((1 + r)^t − 1) / r], where PV is present value (current savings), PMT is the periodic contribution, r is the periodic interest rate, and t is the total number of periods. The calculator converts annual return to a monthly rate and compounds monthly.

The exponential nature of compounding means that time in the market matters far more than the size of any single contribution. A saver who starts at age 25 with modest monthly contributions will typically accumulate more than someone who starts at 40 with much larger contributions, even if the total amount contributed is similar. This is why financial advisers consistently emphasise starting early, even with small amounts.

FV = PV × (1 + r)^t + PMT × [((1 + r)^t − 1) / r]

Future value of current savings plus regular contributions compounded over t periods at periodic rate r.

Choosing a realistic rate of return assumption

The annual return assumption is the single most sensitive input in any retirement savings projection. Small changes in the assumed return produce large differences in the projected balance because the effect compounds over decades. A 1 percentage point difference in annual return over 30 years can change the final balance by 25% or more.

Historical long-term returns for a diversified equity portfolio have averaged roughly 7% to 10% per year before inflation, depending on the market, time period, and measurement method. After adjusting for inflation, real returns for global equities have historically been closer to 4% to 7%. Many financial planners use 6% to 7% as a moderate nominal assumption for a balanced portfolio of equities and bonds, and 4% to 5% for a more conservative or inflation-adjusted projection.

It is important to understand that no return assumption is a prediction. Actual market returns vary enormously from year to year, and sequence-of-returns risk means that the order in which good and bad years occur matters as much as the average. A retirement savings calculator assumes a constant return, which smooths out this volatility and gives you a planning estimate rather than a guarantee.

Why employer contributions and annual increases belong in the projection

Many retirement savings calculators ask only for the amount you personally contribute each month. That can understate the path for people whose workplace plan, pension arrangement, or employer-sponsored account adds money alongside their own saving. The employer or plan contribution field on this page is deliberately separate from your own monthly contribution so you can see how much of the future balance is funded by outside contributions rather than your household cash flow.

Annual contribution increases matter for the same reason. A flat monthly contribution is easy to model, but real retirement saving often rises after pay increases, debt payoff, bonus changes, or annual pension auto-escalation. The annual contribution increase input lets the monthly saving amount step up once per year, so a saver can compare a flat contribution plan with a plan that gradually raises the saving rate over time.

The calculator also shows the final-year monthly contribution so the increase remains visible. That avoids a common projection mistake: assuming a contribution escalation that looks small today but becomes unrealistic late in the plan. If the final-year contribution looks too high, lower the annual increase or use the scenario as an ambition rather than a base case.

Nominal retirement balance versus today's purchasing power

A projected retirement balance is usually shown in nominal future dollars. That is useful for account statements and future portfolio size, but it can make the number look more powerful than it will feel after years of inflation. A balance of 900,000 in 25 years will not buy the same lifestyle that 900,000 buys today if prices rise along the way.

The inflation assumption on this page discounts the projected balance back into today's purchasing power. It also converts the 4% withdrawal guide into a today-money monthly income estimate. This does not make the projection a full retirement plan, but it helps answer a more practical question: what might this future nest egg feel like in current spending terms?

For consistency, use a nominal return with an inflation input, or use a real return and set inflation to 0%. Do not mix a real return with a separate inflation deduction unless you intentionally want a very conservative stress test.

Worked example: projecting a retirement balance over 25 years

Suppose you are 40 years old with $50,000 in retirement savings, contributing $500 per month, receiving another $150 per month from an employer or plan contribution, increasing contributions by 2% each year, and assuming a 7% annual return over 25 years until retirement at age 65. The calculator converts the 7% annual rate to a monthly rate of approximately 0.5833%, then compounds over 300 months.

Under those assumptions, the projected retirement balance is about $915,528. Your own funding is about $242,182 including the starting balance and stepped-up monthly contributions, employer or plan contributions add about $57,655, and investment growth supplies roughly $615,692. The example shows why employer money and gradual contribution increases can materially change the retirement savings projection.

Using the on-page withdrawal guide, that projected balance translates into roughly $2,289 per month at a 3% starting withdrawal rate, $3,052 per month at 4%, or $3,815 per month at 5% before taxes in future dollars. With a 2.5% inflation assumption, the projected balance is closer to $493,827 in today's purchasing power, and the 4% monthly guide is about $1,646 in today-money terms.

How much should you save for retirement?

Several widely cited rules of thumb can help you gauge whether your savings trajectory is on track. The most common guideline suggests saving 10% to 15% of your gross pre-tax income each year throughout your working career. If your employer offers a matching contribution, the combined amount (your contribution plus the match) should ideally reach that 15% target.

Another common benchmark is the savings-by-age milestone approach. Under this framework, you should aim to have saved roughly one times your annual salary by age 30, three times by age 40, six times by age 50, eight times by age 60, and ten times by your target retirement age. These are broad guidelines derived from modelling typical spending replacement rates and life expectancies, not precise targets.

The 80% replacement-rate rule suggests that most retirees need approximately 70% to 80% of their pre-retirement income to maintain their standard of living, because certain costs (commuting, work clothing, payroll taxes, retirement contributions themselves) disappear. If you expect to spend less in retirement, you may need a smaller portfolio; if you plan to travel extensively or have high healthcare costs, you may need more.

The 4% withdrawal rule, originally derived from the Trinity Study, suggests that a retiree who withdraws 4% of their portfolio in the first year and adjusts for inflation each subsequent year has a high probability of not outliving a diversified portfolio over a 30-year retirement. Working backward from your expected annual spending gives you a target portfolio size: divide your desired annual retirement spending by 0.04 to get the nest egg you need.

What this calculator does not cover

This retirement savings calculator is a compound-growth projection tool. It answers the question of how large your portfolio could grow given your inputs, but it does not model the full complexity of retirement planning. Understanding its limitations helps you use the result appropriately.

The calculator does not include taxes. Contributions to tax-deferred accounts (401(k), traditional IRA) grow tax-free until withdrawal, at which point distributions are taxed as ordinary income. Roth accounts are funded with after-tax money but grow and can be withdrawn tax-free. The projected balance shown here is a gross figure that does not account for the tax treatment of your specific accounts.

The calculator does not model Social Security, pensions, annuities, or other guaranteed income sources. These income streams reduce the amount your investment portfolio needs to fund. If you expect significant non-portfolio retirement income, the portfolio target implied by your spending needs will be lower than a simple spending-based calculation suggests.

The calculator assumes a constant rate of return. In reality, investment returns are volatile, and the sequence in which returns occur (sequence-of-returns risk) materially affects outcomes, particularly in the years immediately before and after retirement. A constant-return projection is a useful planning tool but does not capture this real-world variability.

Finally, the calculator gives inflation context only through the single inflation assumption you enter. The projected balance remains a nominal future-dollar account value, while the today's purchasing-power figure is an estimate based on that one inflation rate. It does not model changing inflation, account-specific real returns, or spending categories that rise faster than general prices.

Frequently asked questions

How much money do I need to retire comfortably?

The amount depends on your expected annual spending in retirement, your life expectancy, and your other income sources such as Social Security or pensions. A widely used starting point is the 4% rule: divide your desired annual retirement spending by 0.04. For example, if you expect to spend $50,000 per year from your portfolio, you would need approximately $1,250,000 saved. This is a planning estimate, not a guarantee, and your actual needs may be higher or lower depending on healthcare costs, lifestyle choices, inflation, and how long you live.

What rate of return should I use for a retirement savings projection?

A common moderate assumption is 6% to 7% nominal annual return for a diversified portfolio of equities and bonds. If you want a more conservative estimate, use 4% to 5%, which roughly reflects real (inflation-adjusted) returns. The right assumption depends on your asset allocation, risk tolerance, and time horizon. More aggressive portfolios with higher equity allocations have historically produced higher average returns but with greater volatility. No assumed rate is a prediction of future performance.

How does starting to save early affect my retirement balance?

Starting early has an outsized impact because of compound interest. Each additional year gives your existing balance and new contributions more time to earn returns, and those returns then earn their own returns. For example, saving $300 per month starting at age 25 at 7% annual return produces roughly $567,000 by age 65. Waiting until age 35 to start the same contributions produces only about $264,000 — less than half — even though you only contributed $36,000 less in total. The missing growth comes from losing 10 years of compounding.

Does this calculator include Social Security or pension income?

No. This calculator projects the growth of your personal savings and investment contributions only. Social Security benefits, employer pensions, annuity income, and other guaranteed income sources are not included. To estimate your total retirement income, add your expected non-portfolio income to the withdrawals your projected savings could support. The related Retirement Calculator on this site offers a more comprehensive projection that accounts for spending targets and income gaps.

What is the difference between nominal and real returns?

Nominal returns are the raw percentage gain on your investments before accounting for inflation. Real returns subtract inflation to show the growth in actual purchasing power. If your portfolio returns 7% and inflation is 3%, your real return is approximately 4%. When using this calculator, if you enter a nominal return rate, the projected balance will be in future dollars that buy less than today's dollars. For a purchasing-power estimate, enter a real (inflation-adjusted) return rate instead.

How much of my income should I save for retirement?

Most financial planners recommend saving 10% to 15% of your gross pre-tax income for retirement, including any employer matching contributions. If you start saving in your twenties, the lower end of that range may be sufficient. If you start later — in your thirties or forties — you may need to save 20% or more to catch up. The right savings rate also depends on your target retirement age, expected spending, and other income sources.

What is the 4% withdrawal rule?

The 4% rule is a retirement-planning guideline suggesting that you can withdraw 4% of your portfolio in the first year of retirement and adjust that amount for inflation each year, with a high historical probability that the portfolio lasts 30 years. It was derived from backtesting U.S. equity and bond returns. For example, a $1,000,000 portfolio would support $40,000 in first-year withdrawals. The rule is a useful planning benchmark but not a guarantee, especially for very long retirements, periods of high inflation, or portfolios that differ significantly from the original study's asset allocation.

Why does this calculator show 3%, 4%, and 5% withdrawal-rate income estimates?

A future balance on its own is hard to interpret. Showing 3%, 4%, and 5% withdrawal-rate guideposts converts the projected nest egg into rough annual and monthly retirement-income ranges. The 3% row is a more conservative planning lens, the 4% row is the classic rule-of-thumb benchmark, and the 5% row shows what a more aggressive starting withdrawal would look like. These figures are only rough starting ranges, because taxes, inflation, portfolio fees, and market sequence risk can materially change what your savings can actually support.

Why does a small change in return rate make such a big difference?

Compounding amplifies small differences over long time horizons. A 1 percentage point increase in annual return applied over 30 years can increase the final balance by 25% to 35%, depending on the contribution pattern. This happens because the higher return compounds not just on the original savings but on all previously accumulated growth. Over a single year the difference is negligible, but over decades it becomes enormous. This is why choosing a realistic return assumption and minimising investment fees both matter so much in retirement planning.

How much should I have saved for retirement by age 30, 40, 50, or 60?

Common savings milestones suggest targeting roughly 1× your annual salary saved by age 30, 3× by age 40, 6× by age 50, 8× by age 60, and 10× by your retirement age. These benchmarks assume you begin saving in your mid-twenties, maintain a consistent savings rate, and plan to replace about 70% to 80% of your pre-retirement income. They are broad guidelines, not precise rules, and your actual target depends on your spending expectations, retirement age, other income sources, and investment returns.

Does this calculator account for employer matching contributions?

Yes. Enter your own regular saving in the monthly contribution field and enter employer match, pension top-up, or other plan money in the employer or plan contribution field. Keeping the two amounts separate helps you see how much of the projected retirement balance comes from your own saving, employer contributions, and investment growth.

Should I include annual contribution increases?

Include an annual contribution increase when you expect your monthly saving to rise after pay increases, automatic plan escalation, debt payoff, or annual budget changes. Keep the assumption conservative and check the final-year monthly contribution shown in the result. If that final amount looks unrealistic, lower the increase or treat the scenario as an upside case.

Why does the calculator show today's purchasing power?

A nominal future balance can be hard to interpret because inflation reduces purchasing power over time. The today's purchasing power figure discounts the projected balance using the inflation assumption, so you can compare the result with current spending levels. If you enter a real inflation-adjusted return instead of a nominal return, set the inflation assumption to 0% to avoid subtracting inflation twice.

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