To retire early, start with 25 times your yearly spending: Kestrel Bay Retirement Advisors treats $160,000 of spending as a $4 million starting target. Health insurance before Medicare at 65 adds about $300,000 at 45, $225,000 at 50 and $150,000 at 55 if premiums run an illustrative $15,000 a year, while Social Security at 67 lowers what the portfolio must cover later.
Say you're 42, your RSUs have been vesting for a decade, and a look at your brokerage login makes you wonder whether you're already done. Maybe you are close. Maybe you're not even halfway, because a big stock balance and a spendable balance are different numbers. The Kestrel Bay Retirement Advisors team wrote this article to help you sort out which one you have, starting with taxes, since that's where we begin every decision.
How much do you need to retire early at 45, 50 or 55?
The table below uses a single person spending $160,000 a year. The base number is the same at every age: $160,000 × 25 = $4,000,000. What changes is the cost of buying health insurance until Medicare starts, which gives adjusted totals of $4,300,000, $4,225,000 and $4,150,000.
The $160,000 excludes insurance premiums, so the health cost is a separate line. We added it as a simple lump sum with no growth, for illustration only. Notice that the base target never moves with age, but the adjustment shrinks by $75,000 for every 5 years you keep working, because you have 5 fewer years of premiums to carry. Five more years of work also adds savings and cuts the years your portfolio must last, which this table doesn't show.
| Retire at | 25-times target | Health cost to 65 | Adjusted target |
|---|---|---|---|
| 45 | $4,000,000 | $300,000 | $4,300,000 |
| 50 | $4,000,000 | $225,000 | $4,225,000 |
| 55 | $4,000,000 | $150,000 | $4,150,000 |
How does the target change with your age and balance?
The 25-times rule assumes roughly 30 years of spending, and at 45 you may need 50. That's why many planners test a lower withdrawal rate such as 3.5%: $160,000 ÷ 0.035 = $4,571,429, about $4.57 million. We'd rather you see both numbers, because the gap between them is the cost of retiring 20 years sooner than the rule assumes.
Access matters as much as size. A 401(k) withdrawal before 59½ generally carries a 10% additional tax, so your taxable account carries the years until then. Starting at 55, that's 4.5 years × $160,000 = $720,000. Starting at 45, it's 14.5 years × $160,000 = $2,320,000. If you leave your employer at 55 or older, you may be able to withdraw from that employer's 401(k) without the 10% tax, so check the rule before you choose a retirement date.
Here's a quick balance test. Count only after-tax holdings. If they're under half of the adjusted target, you have a long runway. If they're three-quarters or more, it's time to test the date in detail, year by year, with taxes included.
What does health insurance before Medicare add?
Medicare generally starts at 65, so you'd cover 20 years at 45, 15 at 50 and 10 at 55. At an illustrative $15,000 a year that's $300,000, $225,000 and $150,000. Real quotes vary a lot by state, age and plan, so get one for your own state before you trust any figure here.
Selling stock raises your income, and income can change what you pay for coverage. We cover that link on a separate page, so here it's one sentence: plan your sales with the premium in mind.
Medicare doesn't make the cost vanish. At 65, Part B costs $202.90 each month in 2026, or $2,434.80 over twelve months, plus a $283 annual deductible. The bill gets smaller, but you still pay it.
What does Social Security change for an early retiree?
For people born in 1960 or later, full retirement age is 67, and a claim at 62 pays 30% less each month. The benefit uses your highest 35 years of earnings. If you stop at 45 after about 23 years of work (assuming you started at 22), 12 of those 35 years count as zero.
Don't subtract the benefit from today's target. It starts between 62 and 67, not now, and your portfolio has to carry you until then. Once it begins, it helps. At an illustrative $36,000 a year in today's dollars, the portfolio draw after 67 falls from $160,000 to $124,000.
Has the stock already made Leah free?
Hypothetical: Leah, 38, spends $160,000 a year, so the rule of thumb gives $160,000 × 25 = $4,000,000. Her $1,200,000 of company stock has an $800,000 basis, so selling it all realizes a $400,000 gain. At an assumed 20% tax that's $80,000, leaving $1,200,000 − $80,000 = $1,120,000.
She also has a $180,000 401(k) and $220,000 of other savings: $1,120,000 + $180,000 + $220,000 = $1,520,000. That is $1,520,000 ÷ $4,000,000 = 38% of the target, a gap of $2,480,000, before tax on the 401(k).
So the answer today is no. Selling all of it in one year would also create one huge tax year, so we'd spread the sale over several years and estimate each year's bill before any shares are sold. All investing involves risk, including loss of principal.
Myths about retiring early, and what is true
Myth: a big stock position means you're done. Stock counts only after tax, and only if a 30% fall doesn't cut it down. In Leah's case it covers 38% of the target.
Myth: you can draw on your 401(k) whenever you stop working. Before 59½ a 10% additional tax usually applies unless an exception fits.
Myth: Social Security will be about the same either way. Fewer working years lower it, and a claim at 62 lowers it by another 30%.
Mistakes that make an early-retirement number too low
The costliest one is counting company stock at full value. Leah's $1.2 million carries a $400,000 gain, which costs about $80,000 if we assume a 20% tax rate, and a 30% fall would remove another $360,000 from a plan that depends on it. Concentrated stock positions are their own topic, but the point here is simple: a number built on full value is too low a bar.
Two more show up often. People treat the 25-times target as a finished plan, when it's only a starting estimate: it ignores inflation, a bad run of early returns, taxes on 401(k) withdrawals and any children's costs, and a pension or a spouse's income changes the number a lot.
- Leaving out health insurance: $300,000 at 45, $225,000 at 50 and $150,000 at 55 in the illustration.
- Treating the 401(k) as available cash at 45: Leah's $180,000 is locked behind the 59½ rule unless an exception applies.
Checklist and what to do this week, and how we can help
Take 25 times your spending (without premiums), add your yearly health-insurance quote times the years until 65, and count your holdings only after tax. If they're under half of that total, retiring within five years is a long shot. Also note the 2026 401(k) deferral limit of $24,500 and how much of it you actually use, since saving more shortens the runway.
Kestrel Bay Retirement Advisors can run this math with your real grants, basis and accounts, and estimate what every sale will cost in tax before you place it. Fill in the request form to set up a video or phone call.
- Write down yearly spending without premiums and multiply by 25.
- Add the health-insurance quote times the years to 65.
- List each account by the age you can reach it without penalty.
- This week: pull your Social Security estimate and a health-insurance quote for your state, then write down the basis of every vested share.
- This week: pick one tranche of stock to sell this year and estimate its tax before you place the order.
Your questions about how much do I need to retire early, answered
Is $4 million enough to retire at 45?
Usually not by itself. $4 million is 25 times $160,000, but a 45-year-old may need 50 years of spending, and health insurance before 65 adds about $300,000 at an illustrative $15,000 a year. A 3.5% rate would need about $4.57 million. Taxes and inflation add more.
Can I take money from my 401(k) before 59½ if I retire at 55?
Possibly. Leaving your employer at 55 or older can allow penalty-free withdrawals from that employer's 401(k), but not from an IRA or an old employer's plan. Otherwise a 10% additional tax generally applies before 59½. Check your plan's rules before you pick a date or roll anything over.
Does retiring early reduce my Social Security check?
Yes, in two ways. Benefits use your highest 35 years of earnings, so stopping at 45 after about 23 years leaves 12 years as zero. Claiming at 62 instead of the full retirement age of 67 cuts the monthly benefit by 30%.
This information is general education only and does not account for your specific circumstances, goals or finances. It is not investment, tax or legal advice. Investing involves risk, including the possible loss of principal. Before making any financial decision, consult a qualified professional about your own situation.