How to Maximize Your 401(k) and IRA in 2019

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The more money you save for retirement during your working years, the more comfort you'll enjoy as a senior. Not only will saving aggressively during your career buy you a more rewarding retirement, but it will also spare you the financial struggles facing so many of today's retirees -- especially because Social Security won't provide enough income to live on.

When it comes to retirement savings, there are two popular tax-advantaged plans to choose from: the 401(k) and the IRA, or individual retirement account. Here, we'll review how these accounts work in 2019 and the steps you can take to use them wisely for your retirement.

On a table outdoors, an alarm clock sits next to successively taller stacks of coins. Next to that, a hand prepares to drop a coin into a glass jar filled with coins and labeled retirement.
On a table outdoors, an alarm clock sits next to successively taller stacks of coins. Next to that, a hand prepares to drop a coin into a glass jar filled with coins and labeled retirement.

IMAGE SOURCE: GETTY IMAGES.

How do 401(k)s work?

A 401(k) is an employer-sponsored retirement plan that's funded directly from your earnings. There are two types of 401(k): the traditional 401(k) and the Roth 401(k). The annual contribution limits for both types of 401(k) in 2019 are $19,000 for workers under 50, and $25,000 for workers 50 or older, and these limits apply no matter how much you earn.

Once you put money into either type of 401(k), you can invest it according to your plan's offerings. Most plans offer a variety of investment choices, ranging from conservative (money markets or bond-focused funds) to aggressive (stock-focused funds). Keep in mind that your investment options with a 401(k) is usually limited to mutual funds, as opposed to individual bonds or stocks.

The money you put into a traditional 401(k) goes in tax-free -- meaning it's deducted from your earnings on a pre-tax basis. As such, if you contribute to a traditional 401(k) in 2019, you'll save money on your 2019 taxes, and those savings will be a function of your effective tax rate. For example, if that rate is 30% and you contribute $15,000, you'll shave $4,500 off of your 2019 IRS bill.

The money in your traditional 401(k) grows on a tax-deferred basis, meaning as your investments earn money year after year, you won't be forced to pay taxes on your gains until you start taking withdrawals in retirement. Once you turn 59 1/2, you're allowed to take withdrawals from your 401(k), at which point those distributions will be taxable. You'll also be required to start taking minimum required distributions, or RMDs, once you turn 70 1/2, and those, too, will be taxable.

Roth 401(k)s work a little differently. With a Roth 401(k), the money you contribute goes in on a post-tax basis, which means there's no immediate tax break for funding your plan. Once that money is in your account, however, it grows on a tax-free basis, and the withdrawals you take in retirement aren't subject to taxes at all. As is the case with a traditional 401(k), you can access your money penalty-free at age 59 1/2 and RMDs begin at 70 1/2. But unlike a traditional 401(k), your Roth 401(k) RMDs are yours free and clear of taxes.