Yes, you can deduct Traditional IRA contributions even if you have a 401(k), but once you’re covered by a workplace plan the deduction phases out based on income. For 2026, a single filer’s deduction starts shrinking at $81,000 of modified adjusted gross income and disappears at $91,000. For married couples filing jointly where the contributor is covered at work, the range is $129,000 to $149,000. Above those ceilings you can still put money into a Traditional IRA, but none of it comes off your taxable income.
When Your 401(k) Makes You “Covered”
The phase-out only applies if you count as an “active participant” in an employer plan. The fastest check is Box 13 of your W-2. If the “Retirement plan” box is checked, the IRS treats you as covered for that year.1Internal Revenue Service. Are You Covered by an Employer’s Retirement Plan?
You don’t have to contribute anything yourself. Under the federal rules, you’re an active participant in a profit-sharing or stock-bonus plan, which includes most 401(k)s, whenever an employer contribution is allocated to your account during the plan year.2eCFR. 26 CFR 1.219-2 – Definition of Active Participant So if your employer drops a 3% non-elective contribution into your account and you’ve never touched the enrollment form, you’re still covered for deduction purposes.
Your spouse’s coverage matters too. If you have no plan of your own but your spouse does, you fall under a separate, more generous phase-out rather than the general uncovered rule.
2026 Income Phase-Outs
If You’re Covered at Work
- Single or head of household: deduction phases out between $81,000 and $91,000 of MAGI.
- Married filing jointly, contributor is the covered spouse: $129,000 to $149,000.
- Married filing separately, if you lived with your spouse at any time during the year: $0 to $10,000. This range wipes out the deduction for nearly everyone in this filing status.
If Only Your Spouse Is Covered
Filing jointly with a spouse who has a workplace plan while you don’t? Your deduction phases out between $242,000 and $252,000 of combined MAGI for 2026.4Internal Revenue Service. 2026 Amounts Relating to Retirement Plans and IRAs
If neither of you is covered at work, no phase-out applies and the contribution is fully deductible at any income level.
How a Partial Deduction Is Calculated
Inside the phase-out range, the deduction shrinks proportionally. Take a single filer with $86,000 of MAGI in 2026. The range spans $10,000, and $86,000 sits $5,000 in, or halfway. The deduction is reduced by 50%. On a $7,500 contribution, $3,750 is deductible and $3,750 is non-deductible. IRS Publication 590-A has the exact worksheet.5Internal Revenue Service. Publication 590-A – Contributions to Individual Retirement Arrangements
What MAGI Means Here
Modified adjusted gross income for this rule is not exactly your AGI. Start with the AGI from Form 1040 and add back the IRA deduction itself, any student loan interest deduction, any foreign earned income or housing exclusion, any excluded savings bond interest, and any excluded employer-provided adoption benefits. For most people with ordinary W-2 income, MAGI and AGI are the same or nearly so. Publication 590-A walks through the calculation.5Internal Revenue Service. Publication 590-A – Contributions to Individual Retirement Arrangements
When the Deduction Is Reduced or Gone
Losing the deduction doesn’t take the Traditional IRA off the table. It just changes what the account is doing for you. You have three practical options.
Contribute anyway on a non-deductible basis. The money still grows tax-deferred, and the portion you already paid tax on won’t be taxed again when you withdraw it, provided you track your basis (see below).
Put the money into a Roth IRA instead. Roth contributions are never deductible, so the deduction phase-out is irrelevant. Qualified withdrawals in retirement, including all growth, come out tax-free. Roth eligibility has its own income limits: for 2026, the phase-out is $153,000 to $168,000 for single filers and $242,000 to $252,000 for married filing jointly.3Internal Revenue Service. 401(k) Limit Increases to $24,500 for 2026, IRA Limit Increases to $7,500
If your income exceeds the Roth limits, the backdoor route is a non-deductible Traditional IRA contribution followed by a Roth conversion. There is no income limit on conversions. Watch the pro-rata rule: if you hold pre-tax money in any Traditional, SEP, or SIMPLE IRA, the IRS treats every dollar you convert as coming proportionally from both pre-tax and after-tax balances, so a chunk of the conversion will be taxable even if the money you just deposited was after-tax.5Internal Revenue Service. Publication 590-A – Contributions to Individual Retirement Arrangements Rolling existing pre-tax IRA balances into your 401(k) first, if the plan accepts incoming rollovers, clears the path.
Track Non-Deductible Contributions on Form 8606
Any dollar you put into a Traditional IRA that you couldn’t deduct becomes basis: money you’ve already been taxed on. Tracking it is how you avoid paying tax on it a second time when you withdraw it years later.
Report the basis on Form 8606, Nondeductible IRAs. File it for any year you make a non-deductible Traditional IRA contribution, take a distribution from a Traditional IRA when you have basis, or convert Traditional IRA money to a Roth.6Internal Revenue Service. About Form 8606, Nondeductible IRAs It attaches to your Form 1040.
The stated penalties for skipping it are modest — $50 for failing to file, $100 for overstating non-deductible contributions.7Internal Revenue Service. Instructions for Form 8606 The real cost shows up decades later when you can’t prove which dollars were already taxed and the IRS treats the whole distribution as ordinary income.
Deadline to Make the Contribution
You have until the tax filing deadline to make a Traditional IRA contribution for the prior year, which is April 15 for most filers. A deposit made in early 2027 can be designated as a 2026 contribution as long as it lands before that April date.8Internal Revenue Service. IRA Year-End Reminders A filing extension does not extend the contribution deadline.