This calculator can help with planning the financial aspects of your retirement, providing an idea of where you stand in terms of retirement savings, how much to save to reach your target, and what your withdrawals will look like in retirement.
A retirement calculator is a financial planning tool that helps you determine whether you are on track to retire comfortably, how much you need to save, what you can safely spend in retirement, and how long your savings will sustain your lifestyle. The four calculators on this page address each of these questions in turn, giving you a comprehensive picture of your retirement readiness from multiple angles.
Retirement planning involves projecting decades into the future, which makes it inherently uncertain. However, a well-built calculator using sound financial math — compound interest, inflation-adjusted real returns, and actuarial income projections — provides a reliable framework for making decisions today. Even approximate answers to "how much do I need?" and "am I saving enough?" are enormously valuable for setting priorities and taking action while time is still on your side.
The most fundamental retirement planning question is also the most personal. There is no universal answer because it depends on your expected lifestyle, your location, your health, how long you live, what other income sources you have, and the returns your investments earn. That said, financial planners use several widely accepted benchmarks to give people a starting point.
A common rule of thumb is that you need roughly 70–90% of your pre-retirement income each year during retirement. This range exists because some expenses decline in retirement (commuting costs, work clothing, payroll taxes) while others may increase (healthcare, travel, leisure). 80% is frequently used as the default estimate. Our first calculator lets you enter your own percentage — or a specific dollar amount — so you can personalize this to your actual expectations rather than relying on a generic rule.
One of the most studied guidelines in retirement finance is the "4% rule," which emerged from the landmark 1994 Trinity Study. The study found that a portfolio invested 60% in stocks and 40% in bonds could sustain inflation-adjusted withdrawals of 4% of the initial portfolio value per year for 30 years with a very high probability of success across historical market conditions. The inverse of this — multiplying your annual income need by 25 — gives you the nest egg size required.
For example, if you need $50,000 per year from your savings (after accounting for Social Security and other income), you would need $50,000 × 25 = $1,250,000 at retirement. While the 4% rule has faced scrutiny in low-interest-rate environments and for longer retirements, it remains a widely used planning benchmark. Our calculator computes your specific required nest egg based on your actual investment return and inflation assumptions rather than fixed rules, giving you a more precise, personalized result.
Inflation erodes purchasing power over time, and this effect is particularly damaging to retirees on fixed or slow-growing income. At 3% annual inflation, the purchasing power of $1,000 today falls to about $744 in 10 years, $554 in 20 years, and $412 in 30 years. A retirement that feels affordable at 65 can feel increasingly tight at 75 and genuinely constrained at 85 if income doesn't keep pace with rising costs.
Our calculator uses the concept of a "real rate of return" — the investment return minus the inflation rate — to project how much nest egg you truly need. This approach ensures your retirement income projections reflect actual purchasing power, not just nominal dollar amounts that may feel large but buy progressively less over time. For a 7% investment return with 3% inflation, the real return is approximately 3.88% — and it's this real return that determines how far your savings stretch through retirement.
Understanding the tax advantages and rules of different retirement account types is essential for maximizing your savings efficiency. The right combination depends on your current income, expected future income, and employer offerings.
Employer-sponsored 401(k) plans (and their nonprofit equivalents, 403(b) plans) are the cornerstone of most Americans' retirement savings. Contributions are made pre-tax, reducing your taxable income today, and the account grows tax-deferred until withdrawal. For 2026, the contribution limit is $23,500 (plus a $7,500 catch-up contribution if you're age 50 or older). Many employers match a portion of employee contributions — typically 50–100% of the first 3–6% of salary — which is essentially free money that dramatically boosts your savings rate. Always contribute at least enough to capture the full employer match.
Individual Retirement Accounts (IRAs) supplement employer plans with an additional tax-advantaged savings vehicle. Traditional IRA contributions may be tax-deductible depending on your income and whether you have access to a workplace plan. The 2026 contribution limit is $7,000 ($8,000 if age 50+). Like a 401(k), earnings grow tax-deferred and withdrawals in retirement are taxed as ordinary income. Required minimum distributions (RMDs) begin at age 73.
Roth accounts are funded with after-tax dollars, but qualified withdrawals in retirement — including all earnings — are completely tax-free. This makes Roth accounts especially valuable if you expect to be in a higher tax bracket in retirement than you are today, or if you simply want tax diversification. The Roth IRA has the same contribution limits as the traditional IRA ($7,000/$8,000 in 2026) but income limits apply — single filers with MAGI above $161,000 and married filers above $240,000 face reduced or eliminated contribution limits. Roth 401(k) plans have no income limits and the same contribution limits as traditional 401(k) plans.
Self-employed individuals and small business owners have access to higher-contribution retirement accounts. A SEP-IRA allows contributions of up to 25% of net self-employment income, up to $70,000 in 2026. A Solo 401(k) allows both employee contributions (same limits as employer 401(k)) and employer contributions, potentially reaching the same $70,000 ceiling. These plans are powerful tools for self-employed professionals to accelerate retirement savings.
Our first calculator includes a field for "other income after retirement" — the monthly income you expect from sources beyond your personal savings. Understanding these income streams and how to optimize them is as important as building your investment portfolio.
Social Security is the largest source of retirement income for most Americans. Your monthly benefit is calculated based on your 35 highest-earning years, adjusted for wage inflation. The full retirement age (FRA) for most current workers is 67. You can claim as early as age 62 with permanently reduced benefits (up to 30% less), or delay up to age 70 with increased benefits (8% per year beyond FRA, for a maximum of 24% more at 70 compared to 67). For a married couple where both spouses worked, coordinating claiming strategies can add hundreds of thousands of dollars in lifetime benefits. The Social Security Administration's my Social Security portal allows you to see your estimated benefit at various claiming ages.
Defined benefit pension plans — increasingly rare in the private sector but still common in government and education — guarantee a monthly payment for life based on your years of service and final salary. If you have a pension, enter your estimated monthly payment in the "other income" field. Be aware that many pensions have limited or no cost-of-living adjustments, which means inflation will erode their real value over a long retirement.
Rental real estate, dividends from taxable investment accounts, royalties, or part-time work can all supplement retirement income. Any reliable monthly income from these sources should be included in the "other income" field to accurately calculate how much of your retirement needs must come from your nest egg.
Our second calculator answers the question: "Given what I have and what I want, how much do I need to save each month?" The answer depends entirely on your current savings, your return assumptions, your timeline, and your target nest egg. A few principles dramatically influence the required savings rate.
Compound interest is the most powerful force in long-term wealth building, and time is its essential ingredient. Consider two investors: Alex starts saving $500 per month at age 25 and stops at 35 (10 years of contributions, $60,000 total invested). Jordan starts saving $500 per month at 35 and continues until age 65 (30 years of contributions, $180,000 total invested). Assuming a 7% annual return, at age 65 Alex has approximately $602,000 while Jordan has $567,000 — despite investing three times less money. This is the power of compound interest compounding for more years.
If you are in your 20s or 30s, saving consistently — even modest amounts — will outperform trying to "catch up" later with larger contributions. Use our second calculator to see exactly how much your current savings rate will grow by retirement.
Financial planners commonly recommend saving 10–15% of gross income for retirement, including any employer match. Those who start late or have more ambitious retirement goals may need to save 20–25% or more. As a practical benchmark, Fidelity suggests having 1x your salary saved by age 30, 3x by 40, 6x by 50, 8x by 60, and 10x by retirement age. If you're behind these milestones, our calculator can show you the monthly savings required to close the gap.
Our third calculator answers "how much can I safely spend each month in retirement?" This is the flip side of the accumulation question, and it's often more emotionally fraught — because spending from savings rather than adding to it requires a different psychological relationship with money.
The calculator computes your monthly withdrawal in two ways: in today's purchasing power (real dollars) and in the nominal dollars you would actually withdraw at the start of retirement. Both figures are important — the real dollar figure helps you understand your lifestyle in familiar terms, while the nominal figure is what you'd actually see in your bank account. For example, if you can withdraw $3,000 per month in today's purchasing power, but you retire in 25 years at 3% inflation, you'd actually withdraw about $6,277 per month in nominal terms — same purchasing power, higher dollar amount.
One of the most important and underappreciated risks in retirement is sequence of returns risk — the danger of experiencing poor investment returns in the early years of retirement while simultaneously withdrawing from the portfolio. Even if average returns over a 30-year retirement are perfectly acceptable, poor returns in years 1–5 can permanently deplete a portfolio, while the same average return earned in a different sequence leaves the portfolio healthy. Diversification, maintaining a cash buffer of 1–2 years of expenses, and flexible withdrawal strategies (spending less in down markets) all help manage sequence risk.
Our fourth calculator addresses the straightforward question: given a fixed savings balance, a fixed monthly withdrawal, and a fixed investment return, how many years will the money last? This is useful for stress-testing your retirement plan — "what happens if my portfolio underperforms?" — or for specific drawdown scenarios like an annuity or a specific savings account.
If your investment return exceeds the effective annual withdrawal rate (annual withdrawal ÷ portfolio balance), your money will technically last indefinitely — the portfolio grows faster than you spend it. The calculator displays this when it applies. In all other cases, the formula for the number of periods is derived from the present value of an annuity equation solved for n. The result is expressed in years and months for clarity.
Each of the four calculators on this page answers a different retirement question, but they work best when used together as a system. Start with Calculator 1 to understand how much you need and whether your current savings trajectory will get you there. If there's a shortfall, use Calculator 2 to determine exactly how much additional monthly saving would close the gap. Once you have a projected nest egg, use Calculator 3 to translate that lump sum into a sustainable monthly income. Finally, use Calculator 4 to stress-test specific scenarios — what if you only save half as much? What if markets return 5% instead of 7%? Running multiple scenarios builds a resilient retirement plan that can weather real-world uncertainty.
For a diversified portfolio of stocks and bonds, financial planners commonly use 5–7% as a nominal annual return assumption for long-term projections. The stock market has historically returned 9–10% nominally, but a retirement portfolio is typically not 100% stocks. After accounting for bonds, fees, and behavioral factors, 6–7% is often cited as a reasonable balanced portfolio assumption. For the real (inflation-adjusted) return, subtract your inflation assumption — so a 7% nominal return with 3% inflation gives a real return of approximately 3.9%.
Enter your estimated monthly Social Security benefit in the "Other income after retirement" field in Calculator 1. This reduces the amount you need to withdraw from your nest egg each month, which in turn reduces the total savings you need. If you're unsure of your benefit, visit the Social Security Administration website (ssa.gov) and log into My Social Security to see your personalized benefit estimate.
Common benchmarks suggest: 1× your annual salary by age 30, 3× by 40, 6× by 50, 8× by 60, and 10× by retirement. These are rough guidelines for someone targeting retirement at 67 with a 15% savings rate. Use Calculator 1 with your specific income, spending needs, and desired retirement age for a personalized answer.
The 4% rule was derived from historical data and assumes a 30-year retirement with a balanced stock/bond portfolio. It remains a useful starting point, but many financial planners now recommend 3–3.5% for those retiring before 65 (longer potential retirement) or in low interest rate environments. More sophisticated planning uses dynamic withdrawal strategies that adjust spending based on portfolio performance. Our calculators allow you to enter your specific return and inflation assumptions to compute your personalized sustainable withdrawal rate.
These calculators use standard financial math — compound interest, present and future value calculations, and real-rate-of-return adjustments — that produce reliable estimates for planning purposes. The largest source of uncertainty is not the math but the inputs: actual investment returns, inflation, and longevity are unpredictable. Treat results as planning ranges, not precise forecasts. Revisit your plan annually and whenever major life changes occur.