Retirement Calculator — Savings Gap, Income Projection & Inflation-Adjusted 2026
You’re 35, earning $80,000 a year, putting $500/month into your 401k, and you plan to retire at 65. The question isn’t whether you’re saving — it’s whether you’re saving enough. This calculator runs your numbers forward year by year, adjusts for inflation, includes your Social Security estimate, and shows you the exact savings gap between what you’ll have and what you’ll need. If you’re behind, it shows you how much more per month closes that gap.
Retirement Calculator
Savings gap · Year-by-year projection · Inflation-adjusted — 2026 limits
Enter your age, savings, and income to see your retirement projection
A retirement calculator projects your savings balance at retirement, estimates the monthly income your portfolio can sustain, calculates your shortfall or surplus versus your income replacement target, and shows year-by-year projections adjusted for inflation using your real inputs — not generic assumptions.
How to Use This Retirement Calculator
Current Age and Retirement Age
Enter your current age and the age you plan to retire. The gap between these two numbers is your accumulation window — the years your money has to grow. Every year earlier you start, or every year you delay retirement, dramatically changes the outcome.
At a 7% annual return, $10,000 invested today becomes:
In 10 years: $19,672
In 20 years: $38,697
In 30 years: $76,123
The doubling effect is why starting at 25 versus 35 produces retirement savings 2× larger — even with identical monthly contributions throughout.
Life Expectancy — Why Your Choice Here Changes Everything
Select your planning horizon: 80, 85, 90, or 95 years. This isn’t morbid — it’s the most important input in the calculator.
Most retirement calculators use a fixed assumption (typically 85). Ours lets you control it because the difference is enormous:
| Plan to | Years in Retirement (retire at 65) | Monthly Withdrawal Supported |
|---|---|---|
| Age 80 | 15 years | Higher monthly amount |
| Age 85 | 20 years | Standard planning |
| Age 90 | 25 years | 25% lower than 80-plan |
| Age 95 | 30 years | 40% lower than 80-plan |
The longevity risk: A 65-year-old woman today has a 50% chance of living past 87. A couple, both 65, has a 50% chance that at least one partner lives past 92. Planning to age 85 means there’s a meaningful probability you outlive your money. Most financial planners now recommend planning to 90–95 for anyone in good health.
Monthly Contribution and 2026 Contribution Limits
Enter your total monthly retirement contributions across all accounts. The calculator hints show 2026 limits — use these to check whether you’re maximising:
401(k) / 403(b) / 457: $24,500/year ($2,042/month)
IRA (Traditional/Roth): $7,500/year ($625/month)
Catch-up if age 50+: additional $8,000/year
Special catch-up 60–63: additional $11,250/year (new in 2026)
HSA (family): $8,550/year (triple tax advantaged)
If your employer offers a match, contribute at minimum enough to capture the full match before anything else — it is a 50–100% instant return on that money.
Expected Annual Return — What 7% Actually Means
The default 7% slider reflects the historical S&P 500 inflation-adjusted average return. The gross nominal return is approximately 10%, but after 3% inflation adjustment, the real return is approximately 7%. The calculator works in real (inflation-adjusted) terms, so 7% is the right starting point.
Return assumptions by portfolio type:
Aggressive (mostly stocks): 6–8% real return
Balanced (60/40 stocks/bonds): 4–6% real return
Conservative (mostly bonds): 2–4% real return
The more years until retirement, the more aggressive a portfolio can reasonably be. A 30-year-old can weather market volatility that a 62-year-old cannot afford.
Income Replacement Rate — 70%, 80%, or 100%?
How much of your pre-retirement income do you need in retirement? The calculator defaults to 80%, which aligns with financial planning consensus.
Why less than 100%:
- You’re no longer saving for retirement (that 15-20% of income disappears)
- Payroll taxes (FICA) end at retirement
- Work-related expenses (commuting, clothing, lunches) reduce or disappear
- Mortgage may be paid off
Why some people need more than 80%:
- Active travel plans in early retirement years
- Medical costs increase with age
- Supporting adult children or parents
- High lifestyle spending that won’t naturally reduce
Choose 90-100% if you’re a high spender or plan significant early retirement activity. Choose 70-75% if you’ll have a paid-off home, minimal debt, and a simple lifestyle.
Social Security — How to Find Your Real Number
The calculator defaults to the 2026 average benefit of $1,976/month. Your actual benefit depends on your earnings history.
To find your real number: Visit ssa.gov/myaccount and log in. Your Social Security Statement shows your projected benefit at 62, 67 (full retirement age), and 70. Use the age-67 figure as your base, and read the Social Security section below for the claiming strategy impact.
→ Enter your actual Social Security estimate from ssa.gov above — the difference from the $1,976 average can shift your retirement gap by $100,000+.
Inflation Rate — Why 3% Is the Right Assumption
The default 3% inflation rate is the Federal Reserve’s long-term target and historical US average. Inflation is the silent retirement killer — $80,000 in today’s purchasing power requires $129,000 in 15 years at 3% inflation.
The calculator applies inflation-adjustments to both your retirement income need (what you’ll need to spend grows with inflation) and your savings projection (growth minus inflation gives real purchasing power). This is why the calculator defaults to showing inflation-adjusted numbers — nominal projections are misleading.
How Much Do I Need to Retire?
This is the most searched retirement question — and the one with the most straightforward answer once you have a method.
The Income Replacement Formula
Annual Income Needed in Retirement =
Pre-retirement Income × Replacement Rate − Social Security (annual)
Example:
$80,000 × 80% = $64,000 needed
$64,000 − ($1,976 × 12) = $64,000 − $23,712 = $40,288/year from savings
Portfolio Needed = $40,288 × 25 = $1,007,200
The × 25 multiplier is the 4% rule (described below). This formula shows the true target: not your gross income replacement, but the gap between your income need and what Social Security provides — which is what your portfolio must actually fund.
The 4% Rule — Is It Still Valid in 2026?
The 4% rule states that withdrawing 4% of your portfolio in year one of retirement, then adjusting for inflation each year, has historically sustained a 30-year retirement in 95%+ of historical scenarios.
Portfolio needed = Annual withdrawal needed ÷ 0.04 = Annual need × 25
$40,000/year needed ÷ 0.04 = $1,000,000 portfolio required
Is 4% still safe in 2026? The original research (Bengen 1994, Trinity Study) used historical US market data through the 20th century. With lower expected bond returns and longer lifespans, some researchers now recommend 3.3–3.5% as a safer rate for 35-year retirements. Practically:
| Rule | Withdrawal Rate | Portfolio for $40K/year | Works for |
|---|---|---|---|
| Traditional 4% | 4.0% | $1,000,000 | 30-year retirement |
| Conservative 3.5% | 3.5% | $1,143,000 | 35-year retirement |
| Very conservative 3% | 3.0% | $1,333,000 | 40+ year / FIRE |
If you’re planning to retire before 60, use 3–3.5% to account for the longer horizon.
Retirement Savings Target by Income Level
| Annual Income | Replacement (80%) | SS Reduces Need | Portfolio Required (4%) |
|---|---|---|---|
| $50,000 | $40,000/yr | −$17,900 | $550,000 |
| $75,000 | $60,000/yr | −$21,100 | $972,500 |
| $100,000 | $80,000/yr | −$24,500 | $1,387,500 |
| $150,000 | $120,000/yr | −$27,800 | $2,305,000 |
| $200,000 | $160,000/yr | −$30,000 | $3,250,000 |
These are inflation-adjusted in today’s dollars. Your actual target is what the calculator computes based on your specific inputs.
How Long Will My Retirement Savings Last?
This is the retirement question that keeps people awake at night — “how long will my money last in retirement?” — and it has a mathematical answer that most calculators bury.
The Withdrawal Rate Determines Everything
How long savings last = f(portfolio size, withdrawal amount, return rate)
$1,000,000 portfolio at 6% return:
Withdraw $30,000/year (3%): Lasts indefinitely — portfolio grows
Withdraw $40,000/year (4%): Lasts 35+ years (historically)
Withdraw $50,000/year (5%): Lasts approximately 26 years
Withdraw $60,000/year (6%): Lasts approximately 18 years
Withdraw $80,000/year (8%): Lasts approximately 12 years
The life expectancy input in the calculator directly controls this calculation. Setting 95 years and retiring at 65 forces the calculator to sustain withdrawals for 30 years — significantly more conservative than the 85-year assumption most calculators hide.
How Long Will My Money Last — Real Scenarios
| Retire at | Plan to | Years to Fund | $800K | $1.2M | $1.8M |
|---|---|---|---|---|---|
| 65 | 80 | 15 yrs | $53K/yr | $80K/yr | $120K/yr |
| 65 | 85 | 20 yrs | $43K/yr | $65K/yr | $97K/yr |
| 65 | 90 | 25 yrs | $36K/yr | $54K/yr | $82K/yr |
| 65 | 95 | 30 yrs | $32K/yr | $48K/yr | $72K/yr |
| 60 | 90 | 30 yrs | $32K/yr | $48K/yr | $72K/yr |
Annual withdrawal amounts in today’s dollars, inflation-adjusted, 6% portfolio return assumption.
→ Set your life expectancy to 90 or 95 in the calculator above and compare the result to 85. The gap in annual sustainable income is the cost of living longer — plan for it now.
Sequence of Returns Risk — The Hidden Danger Nobody Explains
Most retirement calculators assume a steady average return every year. Real markets don’t work that way — and the order of returns matters enormously.
Example: Two retirees, both with $1,000,000, both experiencing the same average 7% return over 20 years — but in different order.
Retiree A: Good returns early, bad returns late
Year 1-5: +18% average → Portfolio grows, withdrawals sustainable
Year 15-20: -15% average → Portfolio large enough to absorb
Outcome: Portfolio survives 30+ years
Retiree B: Bad returns early, good returns late
Year 1-5: -15% average → Portfolio shrinks while withdrawing
Year 15-20: +18% average → Too late, portfolio already depleted
Outcome: Portfolio runs out in year 18
This is sequence of returns risk. Retiring into a bear market with high withdrawal rates is the primary cause of retirement portfolio failure — even with identical average returns over time.
Mitigation strategies:
- Maintain 2-3 years of expenses in cash or short-term bonds at retirement — don’t sell stocks in a downturn
- Reduce withdrawals in down years if flexible
- Delay Social Security to maximise the guaranteed income floor
- Consider a Roth conversion ladder before retirement to reduce tax drag on withdrawals
When Can I Retire?
The calculator answers this by modelling different retirement ages with your current savings trajectory. The most useful framing: what retirement age makes your numbers work given your current contribution rate?
Retirement Age Break-Even — What Staying Longer Does
Each additional working year does four things simultaneously:
- Adds one more year of contributions to the portfolio
- Gives existing savings one more year to compound
- Reduces the number of retirement years the portfolio must fund
- Potentially increases your Social Security benefit
Combined effect on a $500K portfolio at 7%:
Retire at 62 vs 65: Working 3 extra years adds approximately $300,000 to the portfolio
(3 years × $2,000/month contributions = $72,000 in contributions
+ 3 years of compounding on existing $500K = approximately $115,000
+ 3 years of SS delay from 62 to 65 = significant benefit increase)
For most people, working 2-3 additional years has a greater impact on retirement security than any other single action available in their 60s.
The 62 vs 67 vs 70 Social Security Decision
You can claim Social Security at 62 (reduced benefit), 67 (full retirement age for those born after 1960), or 70 (maximum benefit). The stakes are large:
Full benefit at 67: $2,000/month (example)
Claim at 62: $1,400/month (30% reduction — permanently)
Delay to 70: $2,480/month (24% increase — permanently)
Break-even for delaying 67→70:
Lose 3 years of payments vs. gain $480/month more forever
Break-even age: approximately 82-83
Break-even for delaying 62→67:
Lose 5 years of reduced payments vs. gain $600/month more forever
Break-even age: approximately 78-79
Healthy people planning to live past 82-83 almost always benefit from delaying to 70. Couples should typically have the higher earner delay as long as possible — the survivor benefit goes to whichever spouse’s benefit is higher.
Taxes in Retirement — What Most Calculators Ignore
The calculator’s income replacement projection shows pre-tax income. But the tax treatment of your retirement income significantly affects what you actually spend. This is one of the most overlooked components in standard retirement calculators.
Traditional 401k and IRA Withdrawal Tax
Traditional 401k and IRA withdrawals are ordinary income — taxed at your marginal rate in retirement. At $60,000/year in withdrawals, a married couple’s effective federal tax rate is approximately 10-12%, but the marginal rate on each additional dollar can reach 22%.
Required Minimum Distributions (RMDs) begin at age 73 (SECURE Act 2.0).
On a $1,500,000 traditional IRA at 73:
RMD ≈ $1,500,000 ÷ 26.5 = $56,604/year — taxable income
This can push you into higher brackets + affect Medicare premiums
Roth vs Traditional — The Tax Timing Decision
Roth accounts (Roth IRA, Roth 401k) are funded with after-tax money but grow and withdraw tax-free. The choice:
Choose Traditional (pre-tax) if: You’re in a high tax bracket now and expect to be in a lower bracket in retirement. You get the deduction today when it’s most valuable.
Choose Roth if: You’re in a lower bracket now (common in early career), expect higher taxes in retirement, or want flexibility — Roth has no RMDs and withdrawals don’t affect Medicare premiums or Social Security taxation.
The practical strategy for most: Contribute to get the full employer match first (typically pre-tax). Then split between Roth and Traditional based on current bracket. In the 22% bracket, lean Roth. In the 32%+ bracket, lean Traditional.
Taxes on retirement income vary significantly by state. Nine states have no income tax (Florida, Texas, Nevada, etc.). Some states exempt Social Security and pension income. This affects where you retire as much as how much you’ve saved.
Early Retirement — FIRE and the Math Behind It
FIRE (Financial Independence, Retire Early) has grown into a major financial planning approach for people targeting retirement in their 40s or even 30s.
The FIRE Number
FIRE Number = Annual Expenses × 25 (at 4% rule)
OR Annual Expenses × 33 (at 3% rule — for 40+ year retirements)
Example: $48,000/year in expenses
At 4% rule: $48,000 × 25 = $1,200,000
At 3% rule: $48,000 × 33 = $1,584,000
The longer the retirement, the more conservative the withdrawal rate should be. Someone retiring at 40 with a 55-year horizon needs a more conservative withdrawal strategy than someone retiring at 65 with a 25-year horizon.
FIRE Calculation Using This Calculator
Set your retirement age to 45, 50, or wherever your FIRE target is. At current income of $80,000 and $500/month contributions, the calculator shows your savings gap at your target date — and how much monthly savings would close that gap.
Most FIRE practitioners achieve their numbers through two levers: high savings rate (50%+ of income) and expense reduction. A 50% savings rate on $80,000 income means saving $40,000/year — closing the FIRE gap in roughly 17 years from a zero start.
Retirement Planning for Couples
Two people, two Social Security records, two health histories, two different risk tolerances — couples retirement planning is more complex than running two individual calculators.
How Couples Should Use This Calculator
Run the calculator twice: once with combined household income and combined savings, once per person to understand each partner’s individual trajectory. The combined view gives your household target. The individual view reveals who’s more exposed if you separate finances at any point.
Key differences for couples:
- The higher earner should typically delay Social Security as long as possible — their benefit becomes the survivor benefit
- Health insurance before Medicare (65) for the non-working spouse is a major early retirement cost to budget
- Two sets of RMDs beginning at 73 can push combined income into higher brackets — Roth conversions in the 60s reduce this exposure
Survivor Benefits — The Planning Gap Most Couples Miss
When one partner dies, household income drops — often dramatically. Social Security survivor benefits pay the higher of the two benefits, not both. A couple receiving $2,000 + $1,500/month ($3,500 combined) becomes one person receiving $2,000 (the higher amount) — a 43% income reduction.
Plan for the survivor scenario explicitly: does the surviving partner’s income — Social Security plus portfolio withdrawals — support their lifestyle independently? For couples where one partner has significantly less career savings, this planning gap is critical.
Frequently Asked Questions
How much do I need to retire?
Multiply your annual retirement spending need by 25 (the 4% rule). If you need $50,000/year from your portfolio and Social Security provides $24,000, your portfolio must fund $26,000/year — requiring approximately $650,000. For longer retirements (30+ years) or early retirement, use a 3–3.5% withdrawal rate: $26,000 ÷ 0.035 = $743,000. Enter your income and Social Security estimate in the calculator above to see your specific target.
How long will my retirement savings last?
At a 4% withdrawal rate ($40,000/year from a $1,000,000 portfolio), your savings historically sustain a 30-year retirement in 95%+ of historical scenarios. At 5% withdrawal rate, the average portfolio runs out around year 26. At 6%, around year 18. The life expectancy input in the calculator lets you set your planning horizon — the longer the horizon, the lower the sustainable withdrawal rate.
When can I retire?
When your portfolio generates enough income — combined with Social Security — to replace 70-80% of your pre-retirement income. For most people, this happens between 60 and 67. The calculator shows your projected balance at any retirement age, and flags whether your number works. Each additional working year past your initial target typically adds $100,000-200,000 in combined savings and reduced withdrawal years.
What is the 4% rule in retirement?
The 4% rule states you can withdraw 4% of your retirement portfolio in year one and adjust for inflation annually — and your portfolio will last 30 years in 95%+ of historical US market scenarios. On a $1,000,000 portfolio, that’s $40,000/year. The rule was developed by financial planner Bill Bengen in 1994 using 50 years of historical data. For retirements lasting 35+ years, 3.3–3.5% is now recommended as a more conservative rate.
How does Social Security affect retirement savings needed?
Social Security directly reduces the amount your portfolio must generate. At a $1,976/month average benefit ($23,712/year), a couple receiving two benefits covers $47,424/year without touching savings. This substantially reduces the portfolio target. A household needing $80,000/year with $47,424 in Social Security only needs $32,576/year from savings — requiring approximately $814,000 at a 4% withdrawal rate versus $2,000,000 with no Social Security. Enter your actual SS estimate from ssa.gov for accurate results.
What is a good monthly retirement income?
It depends on your expenses and lifestyle, but $4,000–$6,000/month in inflation-adjusted income covers a comfortable retirement for most Americans outside high-cost cities. At a 4% withdrawal rate, $4,000/month requires $1,200,000 in portfolio assets (before Social Security). Combined with average Social Security of $1,976/month, a $700,000 portfolio sustains approximately $5,976/month total retirement income. Adjust the income replacement rate in the calculator to model your target.
Is it too late to start saving for retirement at 45?
No — but the math changes. At 45 with 20 years to 65, you need to save more aggressively. The catch-up provision at 50 allows an additional $8,000/year in 401k contributions. Maximising contributions at $32,500/year (base + catch-up) from age 50 generates approximately $960,000 at 7% return by age 65. That, combined with Social Security and any existing savings, can still fund a meaningful retirement. The calculator shows exactly what your trajectory looks like — enter your current savings and increase the monthly contribution to see the difference.
What is a FIRE retirement number?
Your FIRE number is your annual expenses multiplied by 25 (4% rule) or 33 (3% rule for longer horizons). Someone spending $48,000/year needs $1,200,000–$1,584,000 to retire by any age. Achieving FIRE in your 40s typically requires a savings rate of 40-60% of income. Set your retirement age to 45 or 50 in the calculator above to see your current trajectory versus your FIRE target.
Data source:
Federal Reserve Survey of Consumer Finances (2022), Social Security Administration 2026 average benefit data, Bengen (1994) and Trinity Study withdrawal rate research, IRS 2026 contribution limits
Disclaimer: Estimates only. Does not constitute financial advice.Consult a CFP/RIA for personalized retirement planning.
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