Every January, millions of Americans log into their brokerage accounts, ready to fund their Roth IRA for the new year.
What many of them don't realize is that the ability to contribute at all depends on a number that changed on January 1 — and it's based on income, not net worth or account balance.
For 2025, the income phase-out for single filers runs from $150,000 to $165,000 in modified adjusted gross income.
Married couples filing jointly see their phase-out start at $236,000 and end at $246,000.
Below those ranges, you can contribute the full $7,000 (or $8,000 if you're 50 or older).
The catch is that "modified adjusted gross income" isn't the same as the number on your W-2.
It includes things like taxable investment income, and it can shift based on deductions you take elsewhere.
Plenty of people who assume they're under the limit find out in April that they weren't.
If you fall inside the phase-out window, you don't lose the whole contribution — you just get a reduced amount.
The IRS publishes a worksheet to calculate your exact figure, and most brokerage platforms will walk you through it when you make a deposit.
Contribution limits apply across all your IRAs combined, so maxing out a traditional IRA and a Roth in the same year isn't allowed.
Here's where it gets uncomfortable: if your income ends up too high and you already contributed, you're looking at a 6% excise tax on the excess amount for every year it stays in the account.
That penalty stacks annually, which is why fixing an overcontribution quickly matters more than most people think.
The most common fix is a "recharacterization" — essentially asking your broker to move the money (plus earnings) into a traditional IRA instead, where income limits don't apply to contributions.
You generally have until your tax filing deadline, including extensions, to request it.
There's also a workaround that's become popular, though it deserves a caveat.
If you have no existing pre-tax money in any traditional IRA, you can make a non-deductible traditional IRA contribution and then convert it to a Roth.
This is often called a backdoor Roth, and it's legal — but if you do have pre-tax IRA money sitting around, the pro-rata rule can trigger an unexpected tax bill.
Talking to a tax professional before trying it is a reasonable idea, not an overreaction.
One more thing worth flagging: the income limits don't apply to Roth conversions or to money already inside a Roth account.
Those keep growing tax-free regardless of what you earn later.
The limits only govern new contributions.
Parents and grandparents sometimes forget that a working teenager can open a Roth IRA too, with contribution limits tied to that kid's earned income — not the household's.
It can be a quiet head start, though the account belongs to the child once they're of age.
If your income lands anywhere near these thresholds and fluctuates year to year — commissions, bonuses, freelance work, a side gig — the safest move is to wait until you've done your taxes before contributing, or contribute early and be ready to recharacterize if things change.
The takeaway: the Roth income limits aren't a wall, they're a sliding door.
Knowing exactly where you land on the scale before you hit "contribute" can save you a penalty, a phone call to your broker, and a headache in April.
Final Thoughts
Check the current-year numbers, not last year's — they shift, and so does your income.