How to Pay Zero Federal Tax in Retirement: The 2026 Tax-Free Income Stack

For many married retirees, paying zero — or near-zero — federal income tax on $80,000 to $100,000 in annual spending is not a tax shelter. It's the natural result of four overlapping 2026 rules stacking in your favor: an expanded standard deduction, a new OBBBA senior bonus deduction, the 0% long-term capital gains rate, and Roth distributions that don't appear in gross income at all. Understanding how these layers interact — and how Social Security taxation complicates the picture — is the difference between leaving money on the table and keeping it in your portfolio.

The four-layer tax-free income stack (2026)

Federal income tax for retirees is built on taxable income, which is gross income minus deductions. Four tools reduce that number, often to zero:

Layer 1: Standard deduction — $32,200 (MFJ) / $16,100 (single)

The 2026 base standard deduction for married filing jointly is $32,200. For single filers: $16,100. This absorbs the first $32,200 of IRA withdrawals, pension income, or other ordinary income before a single dollar of tax is owed.¹

Layer 2: Age-65 additional deduction — $3,200 more (MFJ, both 65+)

Taxpayers age 65 and older receive an additional standard deduction on top of the base. In 2026: $1,600 per qualifying spouse for married filers (so $3,200 if both spouses are 65+), and $2,000 for single filers age 65+. These are separate from the OBBBA deduction below and have been part of the tax code for decades.¹

Layer 3: OBBBA senior bonus deduction — $12,000 more (MFJ, both 65+)

The One Big Beautiful Bill Act (signed July 2025) created a new additional deduction of $6,000 per eligible person age 65 and older, available for tax years 2025–2028. For a married couple where both spouses are 65+, this adds $12,000 to your total deductions. Single filers age 65+ get $6,000.

The phase-out begins at $150,000 MAGI for MFJ (and $75,000 for single filers) — reducing the deduction by 6 cents for every dollar above that threshold. Full phase-out at $250,000 MFJ / $175,000 single. For most retirees drawing from a combination of Roth, IRAs, and Social Security, MAGI stays well below the phase-out start.²

Layer 4: 0% long-term capital gains rate — up to $98,900 (MFJ)

Long-term capital gains (assets held more than one year) are taxed at 0%, 15%, or 20% depending on your total taxable income. In 2026, the 0% rate applies to all long-term gains when total taxable income — ordinary plus capital gains — stays at or below $98,900 for MFJ ($49,450 for single filers).³

Here's the key interaction: if your ordinary income (IRA withdrawals, pension) is fully absorbed by deductions — leaving zero ordinary taxable income — then your entire 0% LTCG capacity of $98,900 is available. Every dollar of appreciated stock, bond fund, or taxable account you sell at a gain costs zero federal tax.

The combined deduction stack: how much income it shelters

Roth IRA and Roth 401(k) distributions — qualified withdrawals from accounts held five years and past age 59½ — are excluded from gross income entirely. They don't appear in AGI and don't count toward MAGI for the OBBBA phase-out. Stacking Roth distributions on top of the deduction capacity above extends the zero-tax range further.

The Social Security complication: provisional income

Social Security adds a critical wrinkle. The SS taxation rules under IRC §86 operate on "provisional income" — a concept separate from AGI — defined as:

Provisional income = adjusted gross income + tax-exempt interest + ½ of Social Security benefits

The thresholds:

• MFJ: provisional income below $32,000 → $0 of SS is taxable; $32,001–$44,000 → up to 50% taxable; above $44,000 → up to 85% taxable
• Single: below $25,000 → $0 taxable; $25,001–$34,000 → up to 50% taxable; above $34,000 → up to 85% taxable

The trap: IRA distributions count toward provisional income. Even if your deductions wipe out the taxable income from a $40,000 IRA withdrawal, that $40,000 still sits in your provisional income calculation and can push 85% of your Social Security into gross income — which then also sits in AGI.

Roth distributions do not count toward provisional income. This is why Roth funds are the preferred income source once SS has started: they keep provisional income low, which keeps SS non-taxable, which keeps AGI low, which keeps the entire tax-free stack intact.

Worked Example 1: Bridge period — no Social Security yet

Mark and Helen, both 68, MFJ. Delaying SS to 70 for maximum benefits. Current portfolio: $900K Roth IRA, $600K traditional IRA, $300K taxable brokerage (mostly appreciated index funds, average cost basis 40% of value). Annual spending: $90,000.

Strategy for each dollar of spending:

• Traditional IRA: $44,200 — exactly equal to their combined deduction ($32,200 + $3,200 + $12,000)
• LTCG from taxable account: $25,800 — selling appreciated positions; basis recovered tax-free, gains qualify for 0% rate
• Roth IRA: $20,000 — fills the remaining gap, tax-free

The math: AGI = $44,200 (IRA) + $25,800 (LTCG) = $70,000. Deductions: $47,400. Taxable ordinary income: $0. LTCG taxable income: $25,800 — well below $98,900 threshold → 0% rate. Federal tax: $0. MAGI: $70,000, safely under the $150,000 OBBBA phase-out start and the $218,000 IRMAA Tier 1 threshold.

Note: with a $300K taxable account and $25,800 in annual LTCG, Mark and Helen can sustain this strategy for roughly 12 years before the taxable account is depleted (longer if the account grows). By then, they'll be 80 and drawing mostly from IRA + Roth, with RMDs that may push some income above zero tax — but the Roth conversion work done in their 60s will have reduced that exposure significantly.

Worked Example 2: Post-Social Security — keeping SS non-taxable

Same couple, now both 72. Social Security started at 70: combined $56,000/year ($4,667/month). Taxable account substantially depleted. Annual spending: $90,000.

The provisional income constraint: ½ × $56,000 = $28,000 already counts. They have $4,000 of remaining "room" before provisional income hits $32,000 (the MFJ 50% taxability threshold). Using more than $4,000 in IRA distributions triggers SS taxation.

Strategy: Let the 50% SS taxability threshold work in their favor rather than trying to stay below $32,000.

• IRA: $12,000 → provisional income = $28,000 + $12,000 = $40,000 (within $32K–$44K range; 50% of SS taxable)
• Taxable SS in gross income: 50% × $56,000 = $28,000
• AGI: $12,000 (IRA) + $28,000 (taxable SS) = $40,000
• Deductions: $47,400
• Taxable income: $40,000 − $47,400 = $0
• Roth: $90,000 − $56,000 (SS) − $12,000 (IRA) = $22,000
• Federal tax: $0

The Roth balance funds the remaining $22,000 gap. A couple with a $600K+ Roth can sustain this for 25+ years. This is the direct payoff from Roth conversion work done in their 60s during the pre-RMD, pre-SS bridge period.

What breaks the zero-tax result

Several forces push your tax bill above zero, often unavoidably:

RMDs arrive at age 73 or 75

Required minimum distributions begin at age 73 for those born 1951–1959, and age 75 for those born 1960 or later (SECURE 2.0). RMDs are ordinary income — and they're calculated on your traditional IRA balance at December 31 of the prior year, without regard to spending needs. A $1M IRA at 75 generates roughly $40,000 in RMDs. A $1.5M IRA generates roughly $60,000. When RMDs push AGI above the deduction ceiling, some ordinary income becomes taxable.

The solution: Roth conversions done during the bridge period (before RMDs begin) reduce the future IRA balance and shrink mandatory distributions. Every $10,000 converted from IRA to Roth in your 60s eliminates roughly $400–$500 in future annual RMDs at age 75. See the Roth Conversion Window guide for the math.

The OBBBA senior deduction expires after 2028

The $6,000/person OBBBA senior deduction is available for tax years 2025–2028 only. Starting in 2029, the stack shrinks by $12,000 (MFJ) or $6,000 (single). The zero-tax strategies above still work with fewer resources — you simply have less room for IRA income before the tax bill begins — but the window through 2028 is particularly favorable for heavy Roth conversion or LTCG harvesting.

SS at 85% taxability with a large IRA withdrawal

If provisional income exceeds $44,000 (MFJ) or $34,000 (single), 85% of SS benefits become taxable income. A retiree drawing $50,000 from an IRA with $50,000 in SS faces provisional income of $50,000 + $25,000 (½ SS) = $75,000 — well above $44,000 — so $42,500 (85% of SS) is added to gross income. Combined AGI: $50,000 + $42,500 = $92,500. After $47,400 in deductions, taxable income = $45,100. Tax: roughly $4,700.

The remedy is Roth distributions replacing IRA distributions to keep provisional income controlled. This is why the Roth balance is the most tax-efficient asset in late-stage retirement — it provides spending without triggering SS taxation or consuming deduction capacity.

NIIT at $250,000 MAGI (MFJ)

The Net Investment Income Tax (3.8%) applies to investment income — including LTCG — when MAGI exceeds $250,000 (MFJ) or $200,000 (single). At the income levels where the zero-tax strategies work best ($70K–$120K AGI), NIIT is not a factor. It becomes relevant for retirees with larger portfolios generating higher LTCG, pension income, or RMDs that push MAGI above the threshold.

IRMAA: the hidden Medicare tax that deductions don't help

IRMAA (Income-Related Monthly Adjustment Amount) is the Medicare Part B and Part D surcharge for higher-income beneficiaries. Unlike income taxes, IRMAA is based entirely on MAGI — and the standard deduction, the OBBBA senior bonus, and the age-65+ additional deduction do not reduce MAGI. A Roth conversion that stays within the deduction ceiling still raises MAGI by the full conversion amount.

The 2026 IRMAA Tier 1 threshold is $218,000 MAGI for MFJ ($109,000 for single). Retirees using the zero-tax strategies in this guide typically have MAGI well below that threshold — the worked examples above show MAGI of $40,000–$70,000. IRMAA only becomes relevant when RMDs, Roth conversions, or large LTCG realizations push MAGI above $218,000. At those income levels, the zero-tax strategies described here are no longer applicable anyway. See the Medicare IRMAA Planning guide for the full tier table and avoidance strategies.

Single retiree version: tighter but achievable

Single retirees face smaller thresholds on every dimension: lower standard deduction ($24,100 total vs. $47,400 for MFJ), lower 0% LTCG threshold ($49,450 vs. $98,900), and lower SS provisional income thresholds ($25,000/$34,000 vs. $32,000/$44,000). Zero-tax is still achievable, but it requires more reliance on Roth and smaller IRA draws.

Example: Susan, single, 70, $28,800/year SS ($2,400/month), $850K portfolio (70% Roth, 30% traditional IRA).

• Target: keep provisional income below $25,000 so SS is fully non-taxable
• Provisional income from SS alone: ½ × $28,800 = $14,400. Room remaining: $25,000 − $14,400 = $10,600
• IRA: $10,600 (keeps provisional income at exactly $25,000 → SS non-taxable)
• Roth: spending target minus SS minus IRA

If Susan spends $65,000/year: Roth needed = $65,000 − $28,800 (SS) − $10,600 (IRA) = $25,600. AGI: $10,600 (IRA). Deductions: $24,100. Taxable income: $0. Federal tax: $0.

Who benefits most from these strategies

The zero-tax strategies described above work best for retirees who have:

1. Meaningful Roth balances — built through workplace Roth contributions or Roth conversions during lower-income years
2. Some taxable brokerage account — appreciated positions available for 0% LTCG harvesting
3. Moderate traditional IRA balances — large enough to provide spending without being so large that RMDs overwhelm the deduction stack
4. Social Security delayed to 70 (or near it) — higher SS benefits require less IRA draw to meet spending, which reduces provisional income risk
5. A plan made before 73 — the Roth conversion window and LTCG harvesting window are most effective in the pre-RMD years when income is low and deduction capacity is high

Retirees with $1M–$2.5M portfolios and a thoughtful mix of account types (taxable + traditional + Roth) are the prime candidates for years of near-zero federal tax. Retirees with very large traditional IRAs and minimal Roth balances — who never converted — face mandatory RMDs that may push them above the deduction ceiling permanently.

Sources

1. IRS Rev. Proc. 2025-32 — 2026 inflation-adjusted standard deduction and tax bracket amounts. Standard deduction: $32,200 MFJ / $16,100 single. Additional standard deduction for age 65+: $1,600 per qualifying spouse (MFJ) / $2,000 single. Values reflect 2026 tax year filings.
2. IRS — One Big Beautiful Bill Act: Tax Deductions for Working Americans and Seniors. OBBBA senior bonus deduction: $6,000 per person age 65+, available 2025–2028. Phase-out: 6% reduction per dollar above $75,000 MAGI (single) / $150,000 MAGI (MFJ); fully phased out at $175,000 / $250,000. Applies to both itemizers and non-itemizers.
3. Kiplinger — IRS Updates Capital Gains Tax Thresholds for 2026. 0% long-term capital gains rate: taxable income up to $98,900 MFJ / $49,450 single. 15% rate: $98,901–$613,700 MFJ. 20%: above $613,700 MFJ. Confirmed for 2026 via IRS Rev. Proc. 2025-61.
4. IRC §86 — Taxation of Social Security benefits (static thresholds). Provisional income thresholds have not been adjusted for inflation since 1984: MFJ $32,000 (50% taxable threshold) / $44,000 (85% taxable threshold); single $25,000 / $34,000. Applies unchanged in 2026.
5. CMS — 2026 Medicare Parts B and D Premiums and Deductibles. IRMAA Tier 1 threshold: $218,000 MAGI (MFJ) / $109,000 (single). Part B base premium: $202.90/month. IRMAA does not interact with the standard deduction or OBBBA senior bonus deduction.

Tax values verified June 2026. The OBBBA senior bonus deduction expires after tax year 2028 unless extended by Congress. Standard deduction and LTCG thresholds are adjusted annually for inflation. Verify with IRS.gov or a qualified tax professional for your specific situation.