The excess contribution tax is a 6% annual excise tax under Internal Revenue Code Section 4973 on money you put into a tax-favored account above the yearly limit, and it keeps hitting every year until you take the extra out or absorb it with a later year’s unused room.1Office of the Law Revision Counsel. 26 U.S. Code 4973 – Tax on Excess Contributions to Certain Tax-Favored Accounts and Annuities It applies to traditional and Roth IRAs, SEP and SIMPLE IRAs, health savings accounts, Coverdell education savings accounts, Archer MSAs, and ABLE accounts. A small overage left alone for several years quietly turns into a real tax bill.
How the 6% Tax Works Year Over Year
At the end of each tax year, the IRS looks at whether any uncorrected excess is still sitting in the account. If it is, you owe 6% of that amount, and you owe it again the next year, and the year after that, until the excess is gone.1Office of the Law Revision Counsel. 26 U.S. Code 4973 – Tax on Excess Contributions to Certain Tax-Favored Accounts and Annuities
An example makes the arithmetic concrete. Say you over-contributed $2,000 to your Roth IRA. That’s $120 in excise tax the first year. Do nothing and you owe another $120 the second year, and $120 the third. After five years of inaction, a $2,000 mistake has cost $600 in penalties. The tax is computed on the excess contribution itself, not on any gains or losses that money produced inside the account, and it comes out of your pocket rather than the account. It is nondeductible.
One built-in limit softens the blow for accounts that have lost value: the 6% tax for any year cannot exceed 6% of the account’s total value at year-end.1Office of the Law Revision Counsel. 26 U.S. Code 4973 – Tax on Excess Contributions to Certain Tax-Favored Accounts and Annuities If you opened an IRA with a $2,000 excess contribution and the balance dropped to $1,500 by December 31, the tax caps at $90 instead of $120.
The excess also rolls forward. For any year, the excess equals the current overage plus any uncorrected excess from prior years, minus withdrawals and any amount soaked up by unused contribution room in the current year.2Internal Revenue Service. IRA Year-End Reminders Once the excess reaches zero, the recurring tax stops.
How People End Up With an Excess
Going over the dollar limit is the obvious way. Several less obvious situations produce excess contributions in accounts that look fine on the surface.
Roth IRA Income Phase-Outs
This is the most common accidental excess. Roth eligibility phases out as your modified adjusted gross income rises, and above the top of the range you cannot contribute at all.1Office of the Law Revision Counsel. 26 U.S. Code 4973 – Tax on Excess Contributions to Certain Tax-Favored Accounts and Annuities People often fund their Roth early in the year based on expected income, then a year-end bonus, a vesting event, or a large capital gain distribution pushes them past the limit. Part or all of what they contributed is now excess.
Not Enough Earned Income
You need taxable compensation to contribute to an IRA at all, and your contribution cannot exceed that compensation.3Internal Revenue Service. Topic No. 451, Individual Retirement Arrangements (IRAs) Contribute $7,500 on $3,000 of wages and the $4,500 difference is excess. Investment and rental income do not count as compensation for this purpose. For couples where one spouse stops working, the working spouse can fund the other’s IRA, but only up to their own compensation minus their own IRA contributions.4Internal Revenue Service. Retirement Topics – IRA Contribution Limits
HSA Mid-Year Coverage Changes
HSA limits are prorated if you weren’t covered by a qualifying high-deductible health plan for the full year. Six months of family HDHP coverage means roughly half the annual maximum. Contribute the full amount anyway and the difference becomes excess. This trips up people who change jobs, switch plans, or enroll in Medicare mid-year, especially when automatic payroll contributions were set in January and never adjusted.
The last-month rule offers a workaround: if you’re enrolled in an HDHP on December 1, you can contribute the full annual amount as if you had been covered all year. But you must then stay in an HDHP through December 31 of the following year. Drop coverage inside that 13-month testing period and the extra contributions become taxable income and get a separate 10% penalty.5Internal Revenue Service. Publication 969, Health Savings Accounts and Other Tax-Favored Health Plans
Duplicate and Overlapping Contributions
The IRA limit is combined across all your traditional and Roth IRAs, not per account.4Internal Revenue Service. Retirement Topics – IRA Contribution Limits Put $5,000 in a Roth and $5,000 in a traditional IRA and you’re $2,500 over. The Coverdell $2,000 cap is per beneficiary, not per contributor or per account, so when grandparents and parents each fund the same child’s account, the total often crosses the line without anyone noticing.6Internal Revenue Service. Topic No. 310, Coverdell Education Savings Accounts
Fixing an Excess Before the Filing Deadline
The cleanest fix is to pull the excess out before your tax return is due, including extensions. For most filers that means October 15 of the year after the contribution. A timely correction wipes out the 6% tax for that contribution year entirely.7Internal Revenue Service. Publication 590-A – Contributions to Individual Retirement Arrangements (IRAs)
A timely corrective distribution has to include two pieces: the excess contribution itself and the net income attributable to it, meaning the earnings (or losses) the money generated while sitting in the account. Your custodian runs the calculation under a formula in the Treasury regulations.8eCFR. 26 CFR 1.408-11 – Net Income Calculation for Returned or Recharacterized IRA Contributions Tell them you need a corrective distribution of an excess contribution and they’ll handle the math. If the investment lost money, the NIA can be negative, and you’ll withdraw less than you put in.
The earnings portion is taxable as ordinary income in the year the original contribution was made, not the year of the withdrawal. Under Section 333 of SECURE 2.0, the 10% early distribution penalty no longer applies to the earnings pulled out in a timely corrective distribution, even if you’re under 59½. That change took effect for determinations made on or after December 29, 2022, regardless of when the original contribution went in.7Internal Revenue Service. Publication 590-A – Contributions to Individual Retirement Arrangements (IRAs)
Recharacterization as an Alternative
If your excess is in a Roth IRA because income pushed you past the phase-out, you may be able to recharacterize the contribution as a traditional IRA contribution rather than withdraw it. Recharacterization is a trustee-to-trustee transfer that treats the contribution as if it had gone into the other type of IRA from the start, and it must include the NIA.9Office of the Law Revision Counsel. 26 U.S. Code 408A – Roth IRAs The deadline is the same as for withdrawal: the filing due date including extensions.
Recharacterization applies only to regular contributions. The Tax Cuts and Jobs Act eliminated it for Roth conversions starting in 2018. It also helps only if you’re eligible to make a traditional IRA contribution at all. For high-income taxpayers, recharacterizing into a nondeductible traditional IRA is often the first step of a backdoor Roth.
Fixing an Excess After the Filing Deadline
Once your extended filing deadline passes, you can no longer make the 6% tax for that year disappear. What you can still do is stop it from accruing again.
The simpler route is to withdraw the excess principal. You don’t need to calculate or remove the NIA after the deadline; take out just the excess amount. If the original contribution was nondeductible, which is always true for Roth contributions, the withdrawn principal generally isn’t taxable. The 6% tax stops recurring from that point forward.
The other route is to let the following year’s unused contribution room absorb the excess. If you carried a $1,500 excess into a year with a $7,500 limit and contribute only $6,000, the $1,500 of unused room soaks up the carryover.2Internal Revenue Service. IRA Year-End Reminders You still owe the 6% for the years the excess was actually sitting in the account, but no new penalty accrues once it’s absorbed.
If you already filed without reporting an excess and later discover it, file an amended return with a corrected Form 5329. Write “Filed pursuant to section 301.9100-2” at the top if you’re making the correction within six months of the original due date.7Internal Revenue Service. Publication 590-A – Contributions to Individual Retirement Arrangements (IRAs)
Reporting on Form 5329
Every excess contribution and its associated 6% tax is reported on Form 5329, filed with your Form 1040.10Internal Revenue Service. Instructions for Form 5329 The form has separate parts by account type: Part III for traditional IRAs, Part IV for Roth IRAs, and later parts for HSAs, Coverdells, and ABLE accounts. On each relevant part you report prior-year uncorrected excess, current-year contributions, corrective distributions, and any amount absorbed by unused room. The form walks the math to the 6% tax, which flows to Schedule 2 and into your total liability.
File Form 5329 even when you owe nothing, such as when a corrective distribution zeroed things out. The statute of limitations for the IRS to assess the excise tax generally doesn’t start running until you file the form. Leave it off and the IRS can circle back years later with no time limit. A few minutes of paperwork closes that window.