Retirement Calculator
Projected corpus · Readiness score · Action plan
How your corpus is projected to grow before retirement and draw down after, based on your current inputs.
Drag the sliders to see how small changes would move your score — nothing here changes your saved numbers above.
Every factor behind your score, with the benchmark each is measured against.
| Factor | Your value | Benchmark | Points |
|---|
Prioritized by potential impact — start from the top.
Full transparency on how each factor is scored, so you can check the math yourself.
How This Retirement Calculator Works
This calculator projects two numbers and compares them. First, it grows your current retirement savings and monthly contributions at your expected pre-retirement return to estimate the corpus you'll actually have on the day you retire. Second, it takes your current expenses, projects them forward with inflation, and works out the corpus required to fund every year of your expected retirement — after subtracting any pension or other guaranteed income.
The gap (or surplus) between those two numbers, along with your savings rate, time horizon, pension coverage, and real return margin, feeds a 0-100 readiness score across five weighted factors. The Action plan tab turns your weakest factors into specific next steps.
Why two different return rates
Most retirement plans use a higher expected return before retirement, when a portfolio can hold more growth-oriented assets over a long horizon, and a lower, more conservative return after retirement, when the priority shifts to preserving capital and generating steady income.
Why withdrawals grow with inflation
To maintain the same standard of living throughout retirement, this calculator assumes your monthly withdrawal grows with inflation every year after you retire — not just up to retirement age. That's why the corpus required can look larger than a simple "expenses × years" estimate.
The benchmarks used throughout (100% corpus coverage, 15% savings rate, 25-year time horizon, 50% pension coverage, 5% real return) are general guidelines commonly cited by financial planners — treat them as a starting point, not a fixed rule for your situation or region.
Tips for improving your retirement readiness
Start with time, not just money
An extra 5 years of compounding often does more for your corpus than a much larger monthly contribution started later. Use the What-if tab to compare delaying retirement against saving more each month.
Automate your annual step-up
Committing to raise your contribution by a fixed percentage every year, ideally alongside raises, compounds significantly over a multi-decade horizon without feeling like a bigger sacrifice.
Don't let a conservative post-retirement return sneak up on you
If your assumed post-retirement return is close to or below your inflation assumption, your real return during retirement can turn negative, sharply increasing the corpus you need. Check the Verify tab to see your real return margin.
Guaranteed income reduces the pressure on your corpus
Even a modest pension, rental income, or annuity meaningfully lowers how much your investment corpus alone needs to cover — see the effect in the Details tab.
Revisit your life expectancy assumption honestly
Planning for a shorter retirement than you might actually live is one of the most common ways people run short of money later in life. Err on the longer side if you're unsure.
Recheck every year
Income, expenses, and markets all shift. Revisiting this calculator annually, or after any major life change, keeps your score and action plan accurate.
Frequently asked questions
How does the retirement calculator work?
It projects your retirement corpus from your current savings and contributions, compares it to the corpus needed to cover inflation-adjusted expenses through your expected retirement, and scores five weighted factors. See the Verify tab for exact formulas.
How much money do I need to retire?
A common rule of thumb is 25 times annual expenses, but the real number depends on your retirement length, inflation, post-retirement returns, and any pension income — this calculator computes a personalized figure instead of a flat multiple.
What return rate should I assume?
Many planners use a higher return before retirement and a more conservative one after. What matters most is your real return — your return rate minus inflation — since that's what actually grows purchasing power.
What is a retirement readiness score?
A 0-100 score combining corpus coverage, savings rate, time horizon, pension coverage, and real return margin — five factors that most influence whether a retirement plan is on track.
Does this account for inflation?
Yes — expenses are projected forward to retirement age using your inflation assumption, and withdrawals during retirement grow with inflation each year to preserve purchasing power.
What if my corpus runs out before I expect it to?
The Projection tab simulates your corpus year by year through retirement and flags the age it would be depleted under your current assumptions, so you can adjust course early.
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Sources & further reading
Investopedia – Retirement Planning
A reference explainer on the core building blocks of a retirement plan and common rules of thumb.
SEC Investor.gov – The Power of Compounding
Official guidance from the U.S. Securities and Exchange Commission on how compounding returns build wealth over time.
CFPB – Planning for Retirement
Consumer Financial Protection Bureau tools and guidance for building and checking a retirement plan.
Disclaimer
This calculator is provided for general informational and educational purposes only and does not constitute financial, tax, or investment advice. It is not a substitute for consultation with a licensed financial advisor.
The retirement projection is a simplified model based only on the numbers and assumptions you enter. It does not access your bank accounts, pension records, or any external data, and actual investment returns, inflation, and life expectancy will differ from any assumption used here.
Benchmarks referenced (such as a 15% savings rate or a 5% real return margin) are general guidelines commonly cited by financial planners and may not fit every situation, income level, or life stage.
FinToku is not a financial institution, advisor, or pension provider. Use of this tool does not create any financial or advisory relationship between you and FinToku. You are solely responsible for decisions made using these estimates.
Free tool by FinToku · Results are indicative. Consult a financial advisor for personalized guidance.