Senior tax deduction phase out calculator
For 2026, the enhanced deduction is up to $6,000 per eligible person. It begins shrinking above $75,000 of modified AGI, or $150,000 for married couples filing jointly, at 6% of excess MAGI per eligible person.
MAGI ceilings for target household deductions
Each cell gives the greatest MAGI, in whole cents, that retains at least the target before the deduction is rounded for display. The boundary comes from reversing the same per-person formula used by the calculator.
| Target deduction | Nonjoint, one eligible | Joint, one eligible | Joint, two eligible |
|---|---|---|---|
| $0.01 | $174,999.83 | $249,999.83 | $249,999.91 |
| $1,000.00 | $158,333.33 | $233,333.33 | $241,666.66 |
| $3,000.00 | $125,000.00 | $200,000.00 | $225,000.00 |
| $6,000.00 | $75,000.00 | $150,000.00 | $200,000.00 |
| $9,000.00 | Unattainable | Unattainable | $175,000.00 |
| $12,000.00 | Unattainable | Unattainable | $150,000.00 |
A positive target above the household maximum cannot be reached. A zero target has no ceiling because the deduction never turns negative. One cent above a displayed ceiling drops below the unrounded target, even when both round to the same cent on screen.
How income changes the deduction
The comparison runs each income through the complete formula. Signed change means the second deduction minus the first, so a negative number is deduction lost.
| Scenario | MAGI before | MAGI after | Deduction before | Deduction after | Change |
|---|---|---|---|---|---|
| Single, enters the band | $74,500 | $84,500 | $6,000 | $5,430 | -$570 |
| Single, middle of the band | $125,000 | $135,000 | $3,000 | $2,400 | -$600 |
| Single, leaves the band | $174,500 | $184,500 | $30 | $0 | -$30 |
| Joint, one eligible spouse | $200,000 | $210,000 | $3,000 | $2,400 | -$600 |
| Joint, two eligible spouses | $200,000 | $210,000 | $6,000 | $4,800 | -$1,200 |
The illustrative incomes are TaxBreakCalc scenarios, separate from the IRS examples and recommendations.
Full 2026 phaseout grids
All 63 rows are computed at build time from the calculator engine in $5,000 MAGI increments. Joint households with two eligible spouses lose twice the deduction of a one-person household at each income step.
Single, head of household or qualifying surviving spouse, one eligible person
| Modified AGI | Household deduction |
|---|---|
| $75,000 | $6,000 |
| $80,000 | $5,700 |
| $85,000 | $5,400 |
| $90,000 | $5,100 |
| $95,000 | $4,800 |
| $100,000 | $4,500 |
| $105,000 | $4,200 |
| $110,000 | $3,900 |
| $115,000 | $3,600 |
| $120,000 | $3,300 |
| $125,000 | $3,000 |
| $130,000 | $2,700 |
| $135,000 | $2,400 |
| $140,000 | $2,100 |
| $145,000 | $1,800 |
| $150,000 | $1,500 |
| $155,000 | $1,200 |
| $160,000 | $900 |
| $165,000 | $600 |
| $170,000 | $300 |
| $175,000 | $0 |
Married filing jointly, one eligible spouse
| Modified AGI | Household deduction |
|---|---|
| $150,000 | $6,000 |
| $155,000 | $5,700 |
| $160,000 | $5,400 |
| $165,000 | $5,100 |
| $170,000 | $4,800 |
| $175,000 | $4,500 |
| $180,000 | $4,200 |
| $185,000 | $3,900 |
| $190,000 | $3,600 |
| $195,000 | $3,300 |
| $200,000 | $3,000 |
| $205,000 | $2,700 |
| $210,000 | $2,400 |
| $215,000 | $2,100 |
| $220,000 | $1,800 |
| $225,000 | $1,500 |
| $230,000 | $1,200 |
| $235,000 | $900 |
| $240,000 | $600 |
| $245,000 | $300 |
| $250,000 | $0 |
Married filing jointly, two eligible spouses
| Modified AGI | Household deduction |
|---|---|
| $150,000 | $12,000 |
| $155,000 | $11,400 |
| $160,000 | $10,800 |
| $165,000 | $10,200 |
| $170,000 | $9,600 |
| $175,000 | $9,000 |
| $180,000 | $8,400 |
| $185,000 | $7,800 |
| $190,000 | $7,200 |
| $195,000 | $6,600 |
| $200,000 | $6,000 |
| $205,000 | $5,400 |
| $210,000 | $4,800 |
| $215,000 | $4,200 |
| $220,000 | $3,600 |
| $225,000 | $3,000 |
| $230,000 | $2,400 |
| $235,000 | $1,800 |
| $240,000 | $1,200 |
| $245,000 | $600 |
| $250,000 | $0 |
The CSV button above produces the same three grids in the browser and includes the assumptions and IRS source URLs.
How the 2026 deduction is calculated
Who can be counted
For 2026, an eligible person generally was born before January 2, 1962 and holds a Social Security number valid for employment by the return due date, extensions included. Married taxpayers file jointly or they do not count. On a joint return, only the spouses who meet the individual tests go into the count.
This sits apart from the ordinary age-based additional standard deduction (see the standard deduction calculator), and itemizing makes no difference to it. It lowers income. It is not a credit, a cash payment, a guaranteed tax saving, or a blanket exclusion of Social Security benefits.
Primary IRS sources and scope
- IRS Publication 505 (2026), enhanced deduction amount, age test and income thresholds
- IRS Schedule 1-A, Part V, the per-person 6% phaseout calculation
- IRS Form 1040 instructions, Schedule 1-A eligibility and filing-status rules
- IRS eligibility announcement, including the 2025 through 2028 effective years
Tax year 2026 · verified 2026-09-12 · client-only inputs · pending CPA sign-off
Publication 505 supplies the 2026 amount, cutoff date, and thresholds. The available Schedule 1-A and Form 1040 instructions supply the calculation and eligibility method. This page does not claim to have inspected a final 2026 Schedule 1-A.
Educational estimate of the enhanced federal deduction for seniors. It does not calculate taxable income, tax savings, a refund, Social Security taxation, Medicare premiums, state tax, or eligibility under every special rule. Not tax advice.