What investment return should I assume for retirement planning?

For long-term retirement planning, a 6–7% nominal annual return is commonly used (reflecting a diversified stock/bond portfolio). After 2–3% inflation, this is approximately 4–5% in real terms. The stock market has historically returned about 10% nominally, but a retirement portfolio is typically not 100% equities. Use 6–7% for balanced portfolios, 7–8% for equity-heavy portfolios.

How does Social Security factor into retirement planning?

Social Security replaces approximately 40% of the average worker's pre-retirement income. The exact benefit depends on your 35 highest-earning years and the age you claim - claiming at 62 reduces benefits by up to 30%, while delaying to 70 increases benefits by 8% per year past full retirement age. Many retirees rely on Social Security as the foundation, with personal savings providing supplemental income. Enter your estimated Social Security benefit in this calculator to see the gap your savings must fill.

Retirement Calculator

Q: How much do I need to retire?

The most common rule of thumb is the 25x rule: multiply your desired annual retirement income by 25. For example, if you want $60,000/year in retirement, you need a $1.5 million nest egg. This is based on the 4% safe withdrawal rate - a portfolio of 25x annual expenses can sustain a 4% withdrawal (inflation-adjusted) for at least 30 years in nearly all historical market scenarios.

Q: How much should I save for retirement each year?

Most financial planners recommend saving 10–15% of gross income for retirement throughout your career. Fidelity suggests saving 15% including employer contributions. The 'Fidelity multiplier' benchmarks: 1x salary by 30, 3x by 40, 6x by 50, 8x by 60, 10x by 67. If you start later, you'll need to save a higher percentage to reach these benchmarks.

Q: What is a retirement income gap?

The retirement income gap is the difference between your retirement income needs and your guaranteed income sources (Social Security, pension). For example, if you need $5,000/month and will receive $2,000/month from Social Security, your gap is $3,000/month - $36,000/year. Your investment portfolio must generate $36,000/year sustainably, requiring a nest egg of $36,000 / 4% = $900,000.

Find out if you're on track for a comfortable retirement - and what it takes to get there.

🏖️ What Does Retirement Planning Involve?

Retirement planning is the process of determining how much money you need to retire comfortably and what you must do during your working years to reach that target. The two fundamental questions are: How large a portfolio do I need? And am I on track to build it? This calculator answers both by projecting your retirement nest egg based on current savings and future contributions, then comparing it to the amount required to generate your desired monthly income for your expected retirement duration.

The target nest egg is derived from the 4% rule (or a chosen safe withdrawal rate): divide your annual income need by the SWR. For $60,000/year at a 4% SWR, you need $1.5 million. The income need is the gap between your desired monthly income and guaranteed income sources like Social Security or a pension. A Social Security benefit of $2,000/month reduces the gap from savings by $24,000/year - requiring $600,000 less in the portfolio at a 4% SWR.

Retirement readiness is the percentage ratio of your projected nest egg to your required nest egg. A score above 100% means you're on track to meet (or exceed) your income goal. A score below 100% indicates a shortfall. Key levers to improve readiness: increase annual contributions, extend working years, reduce target retirement income, increase investment return, or factor in higher Social Security benefits by delaying claiming.

📐 Retirement Calculator Formula

Projected Nest Egg = PV × (1+r)ⁿ + PMT × [(1+r)ⁿ − 1] / r × (1+r)

Required Nest Egg = (Monthly Income − SS) × 12 / SWR

Readiness = Projected / Required × 100%

PV = Current retirement savings

PMT = Annual savings contribution

r = Annual return rate during accumulation

n = Years to retirement

SS = Monthly Social Security income

SWR = Safe withdrawal rate (default 4%)

The Required Nest Egg calculation adjusts for Social Security - only the income gap (desired income minus SS) must come from savings. The readiness percentage tells you at a glance how well-positioned you are. A readiness above 100% may allow for earlier retirement, higher income, or leaving a legacy.

📖 How to Use This Calculator

Steps

Enter current savings and annual contribution - include all retirement accounts (401k, IRA, taxable investments earmarked for retirement).

Enter age details - current age, target retirement age, and estimated life expectancy (use 85–95 for conservative planning).

Enter income needs and Social Security - your desired monthly spending in retirement and your estimated Social Security benefit (check SSA.gov).

Click Calculate to see your projected vs. required nest egg, readiness percentage, and income gap from savings.

💡 Example Calculations

Example 1 - On-Track Saver, Age 35

Savings = $100K | Annual contribution = $15K | Age 35→65 | SS = $2K/mo | Income need = $5K/mo | Return = 7%

FV of $100K over 30 years = $100,000 × (1.07)³⁰ = $761,226

FV of $15K/year over 30 years = $15,000 × [(1.07)³⁰ − 1]/0.07 × 1.07 = $1,510,722

Projected nest egg = $761,226 + $1,510,722 = $2,271,948

Income gap = $5,000 − $2,000 = $3,000/mo = $36,000/yr. Required nest egg = $36,000 / 4% = $900,000

Readiness = $2,271,948 / $900,000 = 252% - Well on track!

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Example 2 - Late Starter, Age 45

Savings = $50K | Annual = $10K | Age 45→65 | SS = $1,500/mo | Income need = $4K/mo | Return = 7%

Projected: ~$540K | Required: ($4K − $1.5K) × 12 / 4% = $750K | Readiness: 72% - Gap of $210K

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❓ Frequently Asked Questions

How much do I need to retire?+

The most common rule is the 25x rule: multiply your desired annual retirement income by 25. For $60,000/year in retirement, you need $1.5 million. This is based on the 4% safe withdrawal rate - a portfolio of 25x annual expenses can sustain a 4% inflation-adjusted withdrawal for at least 30 years in nearly all historical scenarios.

How much should I save for retirement each year?+

Most planners recommend saving 10–15% of gross income throughout your career. Fidelity suggests 15% including employer contributions. Benchmarks: 1x salary by 30, 3x by 40, 6x by 50, 8x by 60, 10x by 67. Starting later requires a higher savings rate to reach these targets.

What investment return should I assume?+

For long-term planning, 6–7% nominal annual return is commonly used for a diversified portfolio. After 2–3% inflation, this is 4–5% in real terms. Use 6–7% for balanced portfolios, 7–8% for equity-heavy portfolios, and 4–5% for conservative portfolios.

How does Social Security factor in?+

Social Security replaces about 40% of average pre-retirement income. The benefit depends on your 35 highest-earning years and claiming age. Claiming at 62 reduces benefits by up to 30%; delaying to 70 increases by 8%/year past full retirement age. Social Security reduces the gap your savings must fill, directly lowering your Required Nest Egg.

What is a retirement income gap?+

The retirement income gap is the difference between your desired monthly income and your guaranteed income sources (Social Security, pension). If you need $5,000/month and receive $2,000 from Social Security, your gap is $3,000/month - $36,000/year. Your portfolio must generate $36,000 sustainably, requiring a nest egg of $900,000 at 4% SWR.