Does Idaho tax Social Security benefits?

No. Idaho fully exempts Social Security retirement benefits from state income tax. No matter how much you receive, your Social Security is not added to Idaho taxable income. This calculator excludes it entirely from the Idaho tax base.

Does Idaho tax pension income?

Generally yes, but with a notable exception. Most private pensions are taxed at Idaho's flat 5.8% rate. However, Idaho offers a Retirement Benefits Deduction for certain qualifying pensions — federal Civil Service (CSRS), Idaho firefighters and police retirement, and U.S. military retirement — for recipients who are 65 or older (or 62 and disabled). The deduction is reduced dollar-for-dollar by Social Security benefits received.

How is the Idaho pension deduction calculated?

If you qualify by age and pension type, Idaho lets you deduct your qualifying pension up to an annual maximum (roughly $45,864 for single and $68,796 for married filing jointly in 2024). That maximum is then reduced dollar-for-dollar by the Social Security benefits you received, since those are already tax-free. So large Social Security benefits shrink the available pension deduction.

How are 401(k) and IRA withdrawals taxed in Idaho?

Withdrawals from traditional 401(k) and IRA accounts are taxed as ordinary income at Idaho's flat 5.8% rate, just like wages. They do not qualify for the Retirement Benefits Deduction. Roth withdrawals, if qualified, are generally tax-free at both the federal and Idaho level.

Is this an exact figure?

No. It is an estimate of the Idaho state tax on your retirement income. It does not include the federal tax on these streams, the Idaho standard deduction applied on Form 40, or the grocery tax credit. Confirm pension eligibility and current deduction limits with the Idaho State Tax Commission.

Idaho Retirement Income Tax Calculator 2024

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How Idaho taxes retirement income

Idaho is moderately retiree-friendly. Social Security is fully exempt from Idaho income tax. Idaho’s flat 5.8% income tax applies to most other retirement income — private pensions and traditional 401(k)/IRA withdrawals — but a special Retirement Benefits Deduction can shelter qualifying government, civil-service, and military pensions for people 65 and older (or 62 and disabled). That deduction is capped at an annual maximum and is reduced dollar-for-dollar by Social Security benefits, since those are already tax-free.

How it works

The calculator builds the Idaho taxable base stream by stream:

social security        -> excluded (0% Idaho tax)
pension deduction      = qualifies ? max(0, cap - social security) : 0
                         (cap ~ $45,864 single / $68,796 joint, 2024)
taxable pension        = max(0, pension - pension deduction)
taxable withdrawals    = full 401(k)/IRA amount
idaho taxable          = taxable pension + taxable withdrawals
idaho tax              = idaho taxable x 5.8%

The deduction can never exceed your actual pension, and Social Security both stays tax-free and erodes the pension deduction.

Example and notes

A 67-year-old retiree with $24,000 Social Security, a $40,000 qualifying military pension, and $15,000 of IRA withdrawals (single):

pension deduction = min($45,864 - $24,000, $40,000) = $21,864
taxable pension   = $40,000 - $21,864 = $18,136
idaho taxable     = $18,136 + $15,000 = $33,136
idaho tax         = $33,136 x 0.058   = $1,921.89

Note: Only specific pensions (CSRS, Idaho police/fire, U.S. military) qualify, and the age and disability tests must be met. Deduction caps are adjusted yearly. This estimate covers Idaho state tax only — federal tax on pensions and withdrawals is separate. Verify eligibility with the Idaho State Tax Commission.