Traditional IRA Calculator
Model tax-deferred compound accumulation, solve MAGI workplace deductibility phase-out corridors, track IRS Form 8606 non-deductible basis, and project SECURE 2.0 Required Minimum Distributions (RMDs).
Net Balance (After Withdrawal Taxes): $1,008,088
| Year | Age | Projected MAGI | Contribution | Deductible Part | Non-Deductible Basis | Current Tax Savings | Ending Balance | Net After-Tax Balance |
|---|---|---|---|---|---|---|---|---|
| Year 1 | Age 30 | $70,000 | $7,000 | $7,000 | $0 | $1,540 | $12,656 | $10,758 |
| Year 2 | Age 31 | $72,100 | $7,000 | $7,000 | $0 | $1,540 | $20,887 | $17,754 |
| Year 3 | Age 32 | $74,263 | $7,000 | $7,000 | $0 | $1,540 | $29,734 | $25,274 |
| Year 4 | Age 33 | $76,491 | $7,000 | $7,000 | $0 | $1,540 | $39,246 | $33,359 |
| Year 5 | Age 34 | $78,786 | $7,000 | $7,000 | $0 | $1,540 | $49,470 | $42,050 |
| Year 6 | Age 35 | $81,149 | $7,000 | $7,000 | $0 | $1,540 | $60,462 | $51,393 |
| Year 7 | Age 36 | $83,584 | $7,000 | $7,000 | $0 | $1,540 | $72,278 | $61,436 |
| Year 8 | Age 37 | $86,091 | $7,000 | $7,000 | $0 | $1,540 | $84,980 | $72,233 |
| Year 9 | Age 38 | $88,674 | $7,000 | $7,000 | $0 | $1,540 | $98,635 | $83,839 |
| Year 10 | Age 39 | $91,334 | $7,000 | $7,000 | $0 | $1,540 | $113,313 | $96,316 |
| Year 11 | Age 40 | $94,074 | $7,000 | $7,000 | $0 | $1,540 | $129,093 | $109,729 |
| Year 12 | Age 41 | $96,896 | $7,000 | $7,000 | $0 | $1,540 | $146,056 | $124,148 |
| Year 13 | Age 42 | $99,803 | $7,000 | $7,000 | $0 | $1,540 | $164,292 | $139,648 |
| Year 14 | Age 43 | $102,797 | $7,000 | $7,000 | $0 | $1,540 | $183,895 | $156,311 |
| Year 15 | Age 44 | $105,881 | $7,000 | $7,000 | $0 | $1,540 | $204,968 | $174,223 |
| Year 16 | Age 45 | $109,058 | $7,000 | $7,000 | $0 | $1,540 | $227,622 | $193,479 |
| Year 17 | Age 46 | $112,329 | $7,000 | $7,000 | $0 | $1,540 | $251,975 | $214,179 |
| Year 18 | Age 47 | $115,699 | $7,000 | $7,000 | $0 | $1,540 | $278,154 | $236,431 |
| Year 19 | Age 48 | $119,170 | $7,000 | $7,000 | $0 | $1,540 | $306,297 | $260,353 |
| Year 20 | Age 49 | $122,745 | $7,000 | $7,000 | $0 | $1,540 | $336,551 | $286,068 |
| Year 21 | Age 50 | $126,428 | $7,000 | $7,000 | $0 | $1,540 | $369,073 | $313,712 |
| Year 22 | Age 51 | $130,221 | $7,000 | $7,000 | $0 | $1,540 | $404,035 | $343,430 |
| Year 23 | Age 52 | $134,127 | $7,000 | $7,000 | $0 | $1,540 | $441,619 | $375,376 |
| Year 24 | Age 53 | $138,151 | $7,000 | $7,000 | $0 | $1,540 | $482,022 | $409,718 |
| Year 25 | Age 54 | $142,296 | $7,000 | $7,000 | $0 | $1,540 | $525,454 | $446,636 |
| Year 26 | Age 55 | $146,564 | $7,000 | $7,000 | $0 | $1,540 | $572,145 | $486,323 |
| Year 27 | Age 56 | $150,961 | $7,000 | $7,000 | $0 | $1,540 | $622,337 | $528,986 |
| Year 28 | Age 57 | $155,490 | $7,000 | $7,000 | $0 | $1,540 | $676,293 | $574,849 |
| Year 29 | Age 58 | $160,155 | $7,000 | $7,000 | $0 | $1,540 | $734,296 | $624,152 |
| Year 30 | Age 59 | $164,960 | $7,000 | $7,000 | $0 | $1,540 | $796,650 | $677,152 |
| Year 31 | Age 60 | $169,908 | $7,000 | $7,000 | $0 | $1,540 | $863,680 | $734,128 |
| Year 32 | Age 61 | $175,006 | $7,000 | $7,000 | $0 | $1,540 | $935,737 | $795,377 |
| Year 33 | Age 62 | $180,256 | $7,000 | $7,000 | $0 | $1,540 | $1,013,199 | $861,219 |
| Year 34 | Age 63 | $185,663 | $7,000 | $7,000 | $0 | $1,540 | $1,096,470 | $931,999 |
| Year 35 | Age 64 | $191,233 | $7,000 | $7,000 | $0 | $1,540 | $1,185,986 | $1,008,088 |
1. Mathematical Foundations of Traditional IRA Accumulation
Formulas for tax-deferred future value, IRS MAGI phase-out deductibility, and Form 8606 pro-rata ratios
A Traditional Individual Retirement Arrangement (IRC § 408) functions under an exempt-exempt-taxed (EET) framework: contributions are deductible (reducing current gross income), dividends and capital gains compound untaxed during accumulation, and withdrawals are taxed as ordinary income upon retirement distribution.
Tax-Deferred Future Value
Because zero tax drag occurs annually on reinvested capital, assets compound at the full nominal growth rate r over time t without annual tax friction.
MAGI Phase-Out Deductibility
Calculates allowable tax deduction when modified AGI falls inside the statutory phase-out corridor. Values are rounded up to the nearest $10.
IRS Pro-Rata Basis Fraction
IRS Form 8606 aggregates all non-Roth IRAs (Traditional, SEP, SIMPLE). Non-taxable distribution percentage equals cumulative after-tax basis divided by year-end balance.
Under the classic Traditional vs. Roth Equivalence Theorem, if an investor's marginal tax rate at contribution (T_now) equals their effective tax rate at withdrawal (T_ret), both accounts produce identical after-tax terminal wealth: P × (1 - T_now) × (1 + r)^t = P × (1 + r)^t × (1 - T_ret). Consequently, the decision between Traditional and Roth is fundamentally an exercise in multi-decade tax arbitrage.
2. IRS Traditional IRA Deductibility & Phase-Out Matrix
Statutory MAGI phase-out thresholds based on tax filing status and employer retirement plan coverage
| Filing Status | Workplace Plan Coverage | 2024 MAGI Phase-Out | 2025 MAGI Phase-Out | Deductibility Above Upper Ceiling | IRS Reporting Required |
|---|---|---|---|---|---|
| Single / Head of Household | NOT Covered by Workplace Plan | No Income Limit | No Income Limit | 100% Fully Deductible | Form 1040 Schedule 1 |
| Single / Head of Household | Covered by Workplace Plan (401k/403b) | $77,000 – $87,000 | $79,000 – $89,000 | Non-Deductible (0%) | Form 8606 (Non-deductible basis) |
| Married Filing Jointly (MFJ) | Contributing Spouse Covered | $123,000 – $143,000 | $126,000 – $146,000 | Non-Deductible (0%) | Form 8606 (Non-deductible basis) |
| Married Filing Jointly (MFJ) | Only Spouse Covered (Not You) | $230,000 – $240,000 | $236,000 – $246,000 | Non-Deductible (0%) | Form 8606 (Non-deductible basis) |
| Married Filing Separately (MFS) | Either Spouse Covered | $0 – $10,000 | $0 – $10,000 | Non-Deductible (0%) | Form 8606 (Severe tax penalty) |
Frequently Asked Questions
Authoritative answers regarding IRS deductibility phase-outs, basis tracking, and retirement distributions
How does the MAGI phase-out range affect my Traditional IRA deduction if I am covered by a workplace retirement plan?
Under IRS rules, single filers covered by an employer retirement plan face a phased-out deduction when MAGI falls within statutory corridors ($77,000–$87,000 for 2024; $79,000–$89,000 for 2025). Above the upper ceiling, contributions are strictly non-deductible.
What is the difference between deductible contributions and non-deductible basis tracked on IRS Form 8606?
Deductible contributions reduce current ordinary taxable income on Form 1040, whereas non-deductible contributions are funded with after-tax dollars and must be tracked on Form 8606 to prevent double taxation upon retirement distribution.
How does the IRS pro-rata rule work when converting a Traditional IRA with mixed basis to a Roth IRA?
IRS IRC § 408(d)(2) aggregates all non-Roth IRAs (Traditional, SEP, SIMPLE). The tax-free percentage of any conversion equals total after-tax basis divided by the aggregate year-end value of all non-Roth IRAs combined.
At what age must Required Minimum Distributions (RMDs) begin under the SECURE 2.0 Act?
Under the SECURE 2.0 Act, RMDs must begin at age 73 for individuals reaching age 72 after December 31, 2022, escalating to age 75 starting in 2033, calculated using the IRS Uniform Lifetime Table.
When is a Traditional IRA mathematically superior to a Roth IRA?
A Traditional IRA provides higher terminal wealth when your marginal income tax rate during working accumulation years exceeds your expected effective tax rate during retirement withdrawals.