How Much Money Do You Need to Retire?

How how much money do you need to retire? works in practice

Your retirement number is the portfolio size needed to fund living expenses after you stop working. The 4% rule (25× annual spending) estimates a sustainable withdrawal rate over a 30-year retirement — a planning guideline, not a guarantee.

The goal is not to memorize every term — it is to know which inputs matter and what outcome you are aiming for.

So what: When you can explain this in your own words, you are far less likely to accept a bad quote, fee, or assumption.

A real scenario worth running

Couple needs $80,000/year in today's dollars; Social Security provides $36,000; retire at 65. Step by step: Portfolio must cover $80,000 − $36,000 = $44,000/year → Target portfolio = $44,000 × 25 = $1,100,000 → At 7% return, saving $1,200/month for 25 years ≈ $973,000 — may need higher savings or later retirement. Bottom line: Gap analysis shows whether current savings rate hits the $1.1M target by retirement age.

So what: Plug your own numbers into the same logic before you decide.

The three retirement questions

Retirement planning answers:

1. How much will I spend each year after I stop working?
2. How large a portfolio funds that spending?
3. How much must I save now to reach that portfolio?

Most people underestimate spending (healthcare, inflation) and overestimate investment returns. Conservative assumptions beat optimistic surprises.

So what: Run your own inputs before you commit — small changes in assumptions can shift the outcome sharply.

The 25× rule and 4% withdrawal

Withdraw 4% of your portfolio in year one of retirement, then adjust for inflation each year. Need $60,000/year from your portfolio? Target ≈ $1.5 million (60,000 × 25).

The 4% rule comes from historical US market data — a guideline, not a guarantee. Early retirees (40+ year horizon) often use 3–3.5%.

So what: Run your own inputs before you commit — small changes in assumptions can shift the outcome sharply.

Subtract fixed income first

Don't multiply total spending by 25 — subtract income your portfolio doesn't need to cover:

Example: Couple needs $80,000/year; Social Security provides $36,000

1. Portfolio gap = $80,000 − $36,000 = $44,000/year
2. Target portfolio = $44,000 × 25 = $1,100,000

Also subtract pensions, rental income, and part-time work if planned.

So what: Run your own inputs before you commit — small changes in assumptions can shift the outcome sharply.

Worked example: are you on track?

Goal: $1,100,000 by age 65. Currently 40 with $150,000 saved. Assume 7% average return.

Starting 5 years earlier at age 35 cuts required monthly savings by roughly 30–40%.

So what: Run your own inputs before you commit — small changes in assumptions can shift the outcome sharply.

Inflation: today's dollars vs future dollars

$60,000 of spending today requires roughly $97,000 in 20 years at 2.5% inflation:

Social Security COLA helps but may not match personal healthcare inflation.

So what: Run your own inputs before you commit — small changes in assumptions can shift the outcome sharply.

Healthcare before Medicare (US, age 65)

Budget $500–$1,500+/month per person before Medicare eligibility — often the largest surprise for early retirees.

So what: Run your own inputs before you commit — small changes in assumptions can shift the outcome sharply.

Is $1 million enough?

Home equity counts only if you downsize or use a reverse mortgage — your primary home doesn't generate income while you live in it.

So what: Run your own inputs before you commit — small changes in assumptions can shift the outcome sharply.

Common mistakes

1. 25× rule: portfolio = annual spending × 25 (4% withdrawal rate) — this quietly costs you over time.
2. Subtract Social Security, pension, rental income from spending need — this quietly costs you over time.
3. Healthcare before Medicare (65) is often $500–$1,500+/month in the US — this quietly costs you over time.
4. Inflate future spending — $60k today ≠ $60k in 20 years..

What to do next

Use our Retirement Calculator to model your situation — change one input at a time to see what moves the result most.