Can I retire at 61 with $370k in a 401 (k)?  

The honest answer is that it depends far more on your spending than on the account balance alone. A $370,000 401(k) can support retirement for some people and be far too little for others. As a rough rule of thumb, 4% of $370,000 is about $14,800 a year, 3.5% is about $12,950, and 5% is about $18,500. Those figures are before tax, and higher withdrawal rates create more risk that the money will not last through a long retirement. The math is simple, but the decision depends on whether your actual spending can fit within that income plus any other resources.

At age 61, the timing issue matters a lot. Social Security retirement benefits can start as early as 62, but SSA says benefits are reduced if you claim before full retirement age. SSA also says that for people born in 1960 or later, full retirement age is 67, and that starting as early as 62 can reduce the benefit substantially; SSA gives the example that if you turn 62 in 2026, your benefit would be about 30% lower than if you waited until full retirement age 67.

Healthcare is another major factor. Medicare says it is generally for people 65 or older, so someone retiring at 61 typically needs to cover health insurance for about four years before Medicare begins, unless they qualify earlier through disability or another path. That bridge period can be expensive enough to make an early-retirement plan work or fail.

The good news is that, from a tax penalty standpoint, age 61 is past one major hurdle. The IRS says distributions from qualified retirement plans are not subject to the 10% additional tax on early distributions once the recipient turns 59½, though ordinary income tax can still apply to traditional 401(k) withdrawals.

So the best answer is: yes, retirement at 61 could be possible with $370,000, but usually only if your spending is modest and you also have meaningful support from Social Security, low housing costs, low debt, manageable healthcare costs, or other savings or income. If you need middle-class spending from the portfolio alone, $370,000 is usually too thin. The most useful next step is to compare your expected annual spending against what the portfolio can safely provide, then layer in your estimated Social Security at 62, 67, and 70 using SSA’s calculators.