How much do you need to retire on $100k a year?
To spend $100,000/year after tax ($8,333/month) in retirement, you'd need roughly $2,120,000 if you retire at 65 — and more if you retire earlier, because the money has to last longer. Here's the nest egg required at each retirement age.
Nest egg needed for $100k/year, by retirement age
Retire earlier and the same income needs a bigger cushion, because the horizon is longer and Social Security is further off. Assuming 6% nominal return, 3% inflation, no Social Security:
| Retire at | Horizon | You need about |
|---|---|---|
| 55 | 40 yrs | $2,530,000 |
| 60 | 35 yrs | $2,340,000 |
| 62 | 33 yrs | $2,260,000 |
| 65 | 30 yrs | $2,120,000 |
| 67 | 28 yrs | $2,020,000 |
What moves this number
- Social Security. A typical benefit can cover a large slice of $100k/year on its own, so the portfolio only has to supply the rest — often cutting the required nest egg substantially.
- Taxes and account mix. $100,000 of spendable income requires a larger pre-tax withdrawal, since traditional-account money is taxed on the way out. A Roth-heavy portfolio needs less.
- How long it must last. Retiring at 55 instead of 65 adds a decade of withdrawals, which is why the earlier rows above are larger.
Keeping a six-figure income below the IRMAA and NIIT tripwires
A six-figure retirement income lives close to two thresholds that raise costs sharply once crossed. IRMAA lifts Medicare Part B and Part D premiums when income two years earlier clears a limit, and the net investment income tax adds a surtax on dividends, interest, and capital gains above a set level. Neither is gradual at the edge — nudging a dollar past a limit can cost far more than that dollar — so the aim is to control the shape of taxable income, not just its total.
Roth balances are the quietest tool for this. Qualified Roth withdrawals do not count toward the income that IRMAA and the surtax measure, so a portfolio with a healthy Roth share can fund the same spending while showing less income to those tests. Building that share through conversions in the lower-income years before Medicare and RMDs begin is the groundwork.
- Locate bonds and other tax-inefficient assets inside tax-advantaged accounts to hold down taxable investment income.
- Watch the IRMAA limit two years before each Medicare year when sizing conversions or withdrawals.
- Convert and harvest gains in lower-income years, before benefits and RMDs stack on top.
Common questions
How much do I need to retire on $100,000 a year?
About $2,120,000 retiring at 65, or roughly $2,530,000 if you retire at 55 (the money must last longer). These are after-tax spending figures including the tax on withdrawals.
How much does $100k/year require if I retire early?
Retiring at 55 rather than 65 raises the nest egg needed to about $2,530,000 in this projection, because a longer retirement means more total withdrawals and Social Security is further away.
Does Social Security reduce what I need?
Substantially. Social Security is inflation-adjusted lifetime income, so every dollar it provides is a dollar the portfolio doesn't have to. Add your benefit in the calculator to see the lower target.