I just realized something most people get wrong about inherited Roth IRAs—they assume it's all tax-free money waiting for them. The reality? It's way more complicated than that, and the tax implications depend heavily on your relationship to the person who left it to you.

Let me break this down because it matters. When you inherit a Roth IRA, whether inherited Roth IRAs are taxable basically comes down to one thing: the five-year rule and which type of beneficiary you are. The original owner could leave money sitting there forever without touching it, but you don't get that luxury. The SECURE Act changed everything back in 2019, and if the account owner died in 2020 or later, you're dealing with completely different rules than your parents might have dealt with.

If you're the surviving spouse, you've actually got some flexibility. You can treat the inherited Roth as your own by rolling it into an account in your name—and here's the good part—you won't owe taxes on withdrawals the way you would with a traditional IRA. But here's where inherited Roth IRAs are taxable becomes relevant: if you take out earnings before five years have passed since your spouse first contributed, you're paying ordinary income tax on that portion. Most of the time you won't hit this issue because distributions come from contributions first, then conversions, then earnings. Only if you're cashing out a small account or taking huge distributions do you actually trigger this.

Now, if you're not the spouse—say you're a sibling, friend, or named beneficiary—things tighten up significantly. You can't just roll it to your own account. You need to set up a beneficiary designated Roth IRA, and this is critical: it has to be a trustee-to-trustee transfer. Any other method counts as a distribution, and that's when inherited Roth IRAs are taxable in ways that could really hurt. You've got ten years to empty the account entirely.

Here's what trips people up: the RMD rules. If you don't take distributions when you're supposed to, the IRS hits you with a penalty up to 25% of what you should have withdrawn—that's if it's 2023 or later. Before that, it was 50%. So ignoring these deadlines gets expensive fast.

The five-year rule applies across the board. If the account hasn't been open for five full years, and you're pulling out investment earnings, you're paying taxes on those earnings. It's one of those hidden gotchas people miss when they inherit money they thought was tax-free.

Bottom line: inherited Roth IRAs are taxable in specific situations, and knowing which beneficiary category you fall into changes everything about your strategy. If you're in this situation, talk to a financial advisor before making any moves. The difference between handling this right and wrong could easily cost you thousands in unnecessary taxes.