Rollover IRA Rules: Contributions, Deductibility & the Once-Per-Year Limit (2026)

You've rolled your 401(k) into an IRA. Now what? Most people don't realize that the rollover account has its own rulebook — on whether you can still make annual contributions, whether those contributions are tax-deductible, and a hidden trap (the once-per-year indirect rollover rule) that has cost thousands of people unexpected tax bills. This guide covers all of it, with a 2026 deductibility calculator to find your exact situation.

What is a rollover IRA, legally?

Until 2001, the IRS required rollovers to be held in a separate "conduit IRA" to preserve the ability to later roll those funds back into an employer plan. The Economic Growth and Tax Relief Reconciliation Act (EGTRRA) of 2001 eliminated that requirement — conduit IRAs became unnecessary. Today, a rollover IRA is simply a traditional IRA that received a 401(k) or other qualified plan rollover. There is no IRS Form, no special tax treatment, and no distinction from a traditional IRA funded entirely by annual contributions.

Practically, many custodians still label the account "Rollover IRA" internally — but that is for their record-keeping, not the tax code. Once funds are in the account, they follow traditional IRA rules in every respect: contribution limits, deductibility, RMD rules, and beneficiary rules.

One important exception: if you want to later reverse the rollover and move funds back into a new employer's 401(k) plan, the plan must accept incoming IRA rollovers (many do, but not all). Pre-tax funds rolled into a traditional IRA can be moved to a qualified plan; after-tax (non-deductible) contributions tracked on Form 8606 generally cannot.

Can you still contribute to a rollover IRA?

Yes. Making a 401(k) rollover into an IRA does not count against your annual contribution limit. The rollover is not a "contribution" under IRC § 408 — it's a nontaxable transfer. You can roll over $500,000 and still make your $7,500 annual IRA contribution in the same year.¹

For 2026, the annual IRA contribution limits are:²

• Under age 50: $7,500
• Age 50 or older: $8,500 (includes $1,000 catch-up; IRA catch-up is not indexed for inflation)

These limits apply across all your traditional and Roth IRAs combined. If you contribute $4,000 to a Roth IRA, you can contribute at most $3,500 more to your traditional rollover IRA (for someone under 50).

Are those contributions tax-deductible?

This is where it gets nuanced. Traditional IRA contributions are deductible only if your income is below IRS-set thresholds — and the thresholds depend on whether you (or your spouse) are covered by a workplace retirement plan like a 401(k), 403(b), SIMPLE IRA, or SEP IRA.

If you have no active workplace retirement plan and neither does your spouse, your traditional IRA contributions are fully deductible at any income level. But if you or your spouse is in an active workplace plan, deductibility phases out:

Below the lower threshold: fully deductible. Above the upper threshold: not deductible at all. In between: a prorated deductible amount, rounded down to the nearest $10 with a $200 minimum.³

2026 IRA Deductibility Calculator

What to do with non-deductible contributions

If your income puts you in the phase-out range or above it, you can still contribute to a traditional IRA — you just don't get the upfront deduction. These are called nondeductible contributions. You track them on IRS Form 8606, which establishes your cost basis. When you eventually withdraw, the basis portion comes out tax-free; only the earnings are taxable.

However, nondeductible traditional IRA contributions interact badly with the Backdoor Roth strategy if you already have pre-tax IRA money (including the rollover balance). The pro-rata rule means you can't designate only the nondeductible dollars for conversion — every conversion draws proportionally from all your traditional IRA balances. A $100,000 rollover IRA plus $7,500 in nondeductible contributions means only about 7% of any conversion is tax-free. See Backdoor Roth and the Pro-Rata Trap for the full mechanics.

If your income is too high for traditional IRA deductibility and you have pre-tax rollover money in the IRA, the better move is usually either (a) move the pre-tax money back into a 401(k) via a reverse rollover to clear the pro-rata problem, or (b) skip the traditional IRA entirely and accept that the Backdoor Roth isn't available in your current account structure.

The once-per-year indirect rollover rule (the Bobrow trap)

This is the most commonly violated — and most expensive — rollover IRA rule. It does not appear on any standard rollover checklist, but it has triggered six-figure unexpected tax bills for people who assumed "rollover" means the same thing every time.

The rule

You may complete only one indirect (60-day) IRA-to-IRA rollover per 12-month period across all of your IRAs combined — not one per account.⁴ The rule comes from IRC § 408(d)(3)(B) and was clarified by the Tax Court in Bobrow v. Commissioner (T.C. Memo. 2014-21).

An indirect rollover is when you take a distribution from IRA #1, receive the check payable to you, and deposit it into IRA #2 within 60 days. This is a rollover — not a transfer. The 12-month clock starts on the date of the IRA distribution (not the date you deposit it).

What it does NOT apply to

• Direct (trustee-to-trustee) transfers between IRAs — unlimited per year. The money never touches your hands.
• Rollovers from a 401(k) or other employer plan to an IRA — these are plan-to-IRA rollovers under IRC § 402(c), not IRA-to-IRA rollovers. Completely separate rule; no per-year limit.
• Roth conversions — converting from a traditional IRA to a Roth IRA is not subject to the once-per-year limit.

The violation scenario

Example: In January 2026, Dave takes a $50,000 distribution from IRA #1 at Fidelity and deposits it into IRA #2 at Schwab within 60 days — a valid rollover. In August 2026, he takes $30,000 from IRA #2 at Schwab and deposits it into IRA #3 at Vanguard within 60 days, thinking he's just doing another rollover.

He's not. The second transaction violates the once-per-year rule. The $30,000 is treated as a taxable distribution from IRA #2 — ordinary income in 2026 plus a 10% penalty if he's under 59½. If he deposited it into IRA #3, that $30,000 is also treated as an excess contribution to IRA #3, subject to a 6% penalty for each year it remains. Total tax exposure: potentially $30,000 of ordinary income + $3,000 penalty + years of 6% excess contribution penalties on the IRA #3 deposit.

RMD rules for a rollover IRA

Because a rollover IRA is a traditional IRA, required minimum distributions apply:

• RMD start age: 73 if you were born between 1951 and 1959; 75 if born in 1960 or later (SECURE 2.0 Act § 107).⁵
• RMD aggregation: You must calculate an RMD for each traditional IRA separately, but you can take the total from any one IRA or a combination of them. You cannot use a 401(k) RMD to satisfy an IRA RMD — they're separate pools.
• No still-working exception: Unlike 401(k) plans, traditional IRAs do not have a still-working exception. RMDs begin at your required beginning date regardless of employment status.
• No Roth IRA lifetime RMDs: If you convert the rollover IRA to a Roth IRA, there are no lifetime RMDs on the Roth IRA balance. Roth 401(k) accounts were also freed from lifetime RMDs starting in 2024 under SECURE 2.0 § 325.

If reducing RMDs is a goal, the rollover IRA can be a source for annual Roth conversions in the years between retirement and RMD start age — reducing the future balance subject to mandatory distributions while filling lower tax brackets.

Rollover IRA vs. keeping funds in the old 401(k)

The rollover IRA has advantages (unlimited investment options, single account, Roth conversion flexibility) but two specific situations favor leaving funds in an employer plan or rolling to a new employer's 401(k) instead:

1. Rule of 55: If you leave your employer at 55 or older, you can take penalty-free distributions directly from that employer's 401(k). Rolling to an IRA forfeits this exception permanently. See Rule of 55.
2. Backdoor Roth (pro-rata): Pre-tax balances in a rollover IRA count against the pro-rata calculation for Backdoor Roth contributions. If you're a high earner who relies on the Backdoor Roth, rolling to a new employer's 401(k) instead of an IRA may be better — or executing a reverse rollover after the fact. See Reverse Rollover.

Three real scenarios

Scenario 1: The high earner with a workplace plan who wants to keep contributing

Priya, 42, earns $220,000 (MAGI) in 2026 and is covered by her employer's 401(k). She just rolled a $380,000 old 401(k) into a traditional IRA. She wants to also make annual IRA contributions.

Her MAGI exceeds the $91,000 single phase-out ceiling — her traditional IRA contributions are not deductible. Contributing $7,500 nondeductible and tracking it on Form 8606 creates basis, but the pro-rata rule means any future Backdoor Roth conversion is mostly taxable because she now has $380,000 in pre-tax rollover money in the same IRA pool. Her better options: (a) move the rollover into her new employer's 401(k) via direct rollover to clear the pro-rata problem, or (b) skip the IRA and put additional savings into her 401(k) or taxable account instead.

Scenario 2: The early retiree who wants maximum flexibility

Kevin, 58, retired in 2026 with $620,000 rolled into a traditional IRA and no active workplace plan. His 2026 income consists of $28,000 in dividends and a $15,000 part-time consulting contract — total MAGI $43,000. No workplace plan means no phase-out: his traditional IRA contribution of $8,500 (catch-up) is fully deductible, reducing his 2026 taxable income to $34,500. He also plans to convert $60,000 of his rollover IRA to Roth annually, staying within the 12% bracket ($50,400 top for single in 2026) after the $16,100 standard deduction. Annual contribution + conversion + deduction = three separate tax-advantaged moves running in parallel.

Scenario 3: The couple who nearly triggered the Bobrow trap

Lisa and her husband have separate rollover IRAs — both from different old employers rolled over in 2024. In early 2026, Lisa takes a $45,000 distribution from her rollover IRA at Fidelity (intending to deposit it at a new custodian within 60 days) while simultaneously initiating a similar move for her husband's separate IRA. She completes her rollover in March. Her husband completes his in May.

Because each spouse has their own IRA accounts, the once-per-year rule applies separately to each — a husband and wife each get one indirect rollover per year from their own accounts. Neither one violates the rule here. But if Lisa had also tried to move a second IRA of her own in October, that second transaction would be a taxable distribution. The couple avoids the trap but only because they're operating separate IRAs — if Lisa had wanted to consolidate two of her own IRAs, she'd need to use a direct transfer (not a 60-day rollover) for the second one.