Pension income is generally taxable when it is paid to you, but the taxable amount depends on whether your contributions were made with pre-tax or after-tax dollars. This guide explains the federal rules, the forms involved, and the questions to ask your plan administrator before you file.
1. What part of a pension is taxable?
Most employer-funded pensions are paid with pre-tax dollars, so the payments are taxable as ordinary income when you receive them. If you made after-tax contributions, part of each payment may be a tax-free return of your own contributions. The plan reports the taxable portion in Box 2a of Form 1099-R.
If Box 2a is blank, the plan may not have calculated the taxable amount. In that case, you may need to use the Simplified Method in IRS Publication 575 to recover your after-tax basis over the expected number of payments. Keep your contribution records; the plan’s calculation depends on them.
2. Federal withholding: Form W-4P
Periodic pension payments are generally subject to federal income tax withholding unless you elect otherwise on Form W-4P. The form lets you choose a withholding amount based on your filing status, other income, and credits. If you do not submit a form, the payer applies the default withholding rules.
Nonperiodic payments, such as a lump-sum distribution that is not an eligible rollover distribution, generally have 10% withheld unless you elect out. Eligible rollover distributions have a separate rule: if the plan pays the money to you instead of transferring it directly to an IRA or another eligible plan, the plan must withhold 20%. A direct trustee-to-trustee rollover avoids that withholding.
3. State tax is separate
Federal tax is only half of the picture. States treat pension income differently. Some states have no income tax; some tax pension income in full; others offer exclusions, credits, or retirement-income deductions. The state where you live generally taxes the pension, but source-tax rules and reciprocal agreements can complicate a pension earned in another state.
Check your state tax department’s current instructions before estimating a state liability. If state tax is withheld, the amount appears on your 1099-R and your state return.
4. Early distributions and the 10% additional tax
If you take a pension distribution before age 59½, a 10% additional tax may apply on top of ordinary income tax. There are exceptions, including separation from service at or after age 55, disability, death, a qualified domestic relations order, and certain medical expenses. Public safety employees may have a lower separation-from-service age.
The exception depends on the facts and the plan’s reporting. Ask the plan administrator which distribution code appears in Box 7 of Form 1099-R and whether an exception applies. Do not assume that leaving a job automatically removes the 10% tax.
5. RMDs, rollovers, and Roth accounts
Traditional IRAs and most employer plans require required minimum distributions (RMDs) after a certain age. The age is generally 73, or 75 if you were born in 1960 or later under SECURE 2.0; check the current IRS rule rather than relying on an old age-70½ rule. Roth 401(k) accounts are no longer subject to lifetime RMDs starting in 2024, but other Roth rules still apply.
A direct rollover from a pension to an IRA or another eligible plan can defer tax, but not every payment is an eligible rollover distribution. Periodic payments, hardship withdrawals, and certain annuities may not qualify. Get the plan’s rollover notice and confirm the destination accepts the rollover before you move the money.
6. Plan-specific notes
CalSTRS
CalSTRS benefits are reported on Form 1099-R. Federal tax generally applies; California treatment can differ from the federal treatment, and CalSTRS publishes its own tax-withholding guidance. Check your 1099-R and CalSTRS/California Franchise Tax Board guidance for your residency and benefit type.
OPM, FERS, and CSRS
Federal civilian annuities are reported on Form 1099-R. The taxable portion depends on your contributions and the annuity method. OPM’s retirement services and IRS Publication 721 are the starting points for FERS and CSRS questions.
Kentucky teachers
Kentucky Retirement Systems and KTRS benefits are reported on Form 1099-R. Kentucky tax rules for retirement income can change. The 2025 Form 740 instructions include a pension income exclusion of up to $31,110, subject to eligibility; confirm the current amount and rules with the Kentucky Department of Revenue before filing.
Disability pensions
Disability payments may be taxable, partly taxable, or excluded depending on whether they are for a service-connected disability and how the plan funded them. The 1099-R and the plan’s determination are the evidence to review. Veterans’ disability benefits are separate and generally excluded from federal income tax.
7. Survivors and beneficiaries
When a pension continues to a survivor or beneficiary, the tax is generally reported to that person on Form 1099-R. The taxable amount depends on the decedent’s contributions and the payment method. Estates and trusts may have different reporting rules; get the plan’s beneficiary tax statement before filing.
8. Forms and records to keep
- Form 1099-R for each pension payer, including corrected forms.
- Form W-4P elections and any state withholding forms.
- Plan statements showing after-tax contributions and the starting date of payments.
- The plan’s rollover notice and direct-rollover confirmation, if you moved money.
- Records of any disability determination or survivor status.
Check Box 7 distribution codes carefully. A code that looks minor can change whether an early-distribution penalty applies. If a 1099-R is wrong, ask the payer for a corrected form before you file.
9. Common errors
- Reporting the gross pension instead of the taxable amount in Box 2a.
- Forgetting that a rollover paid to you had 20% withheld.
- Using the old 70½ RMD age after SECURE 2.0.
- Assuming a state follows the federal tax treatment.
- Missing the 10% early-distribution exception that applies to your separation date.
Worked example: a $3,000 monthly pension
Assume you receive $3,000 per month from a private employer pension. The plan reports $2,400 as taxable income and $600 as a tax-free return of your after-tax contributions. The $600 is not included in your taxable income; the $2,400 is. Your Form W-4P election controls how much federal tax is withheld from the $3,000 payment.
Now assume you instead take a $30,000 lump sum that is an eligible rollover distribution and have it paid to you personally. The plan must withhold 20% ($6,000) unless you choose a direct rollover to an IRA or another eligible plan. A direct trustee-to-trustee rollover avoids the 20% withholding and defers the tax. These numbers are illustrative; use the amounts on your own Form 1099-R.
| Situation | Federal treatment | Form |
|---|---|---|
| Periodic pension payment | Taxable except for after-tax basis; withholding per W-4P | 1099-R |
| Lump sum paid to you (eligible rollover) | 20% mandatory withholding; taxable unless rolled over | 1099-R |
| Direct rollover | No current tax; no 20% withholding | 1099-R + rollover confirmation |
| Early distribution | 10% additional tax unless an exception applies | 1099-R, Box 7 code |
| Survivor benefit | Generally taxable to the beneficiary; basis rules apply | 1099-R |
| RMD | Required after the applicable age; 25% penalty, with a reduced 10% if corrected within the IRS window | 1099-R |
Federal vs. state at a glance
| Question | Federal | State |
|---|---|---|
| Who taxes the pension? | IRS, based on your residency and the plan | Usually your state of residence; source-tax rules can differ |
| Does the state follow federal taxable income? | N/A | Not always; many states have their own exclusions or credits |
| Is withholding automatic? | Periodic payments: default withholding unless W-4P says otherwise | Depends on the state and the payer |
| Where is it reported? | Form 1099-R and Form 1040 | State return; the 1099-R usually shows state withholding |
Questions to ask your plan administrator
- Is this payment periodic, nonperiodic, or an eligible rollover distribution?
- What is the taxable amount in Box 2a, and how was my after-tax basis calculated?
- Which distribution code will appear in Box 7, and does it affect the 10% early-distribution tax?
- What is the default federal withholding, and what happens if I file a W-4P?
- Does the plan withhold state tax, and for which state?
- What is my RMD age under the plan and my birth year?
- If I die, who reports the survivor benefit and on what form?
Key takeaways
- Pension income is generally taxable, except for the after-tax contributions you recover.
- Form 1099-R Box 2a is the taxable amount; Box 7 can signal an early-distribution issue.
- Form W-4P controls federal withholding; an eligible rollover paid to you has 20% withholding.
- State rules differ, and moving states can create a two-state question.
- The RMD age is 73 or 75 depending on your birth year; check the current IRS rule.
If you move states
Moving does not erase the tax history of a pension. The state where you live generally taxes the payment, but a state where you worked may also claim a source-tax interest. Some states have reciprocal agreements; others do not. Keep your plan statements, W-2s, and state returns so you can show which state has the stronger claim.
If two states tax the same pension, one may allow a credit for tax paid to the other. The rules are state-specific; check both states’ instructions and consider a tax professional if the amounts are material.
How to read Form 1099-R
| Box | What it shows | Why it matters |
|---|---|---|
| 1 | Gross distribution | The total paid before withholding |
| 2a | Taxable amount | The amount to report as pension income; blank means the payer did not determine it |
| 4 | Federal income tax withheld | A credit on your federal return |
| 5 | Employee contributions or after-tax basis | Tracks the part that can be recovered tax-free |
| 7 | Distribution code | May trigger the 10% early-distribution tax or indicate an exception |
| 14–16 | State tax withheld, state payer ID, state distribution | Used on the state return |
If Box 2a is blank, do not assume the whole payment is taxable. Use the plan’s records and the Simplified Method in IRS Publication 575 to calculate the after-tax portion. If Box 7 has a code that does not match your situation, ask the payer for a corrected form before filing.
Second example: after-tax contributions and the Simplified Method
Assume you contributed $60,000 after tax over your career and receive $2,000 per month for 20 years (240 expected payments). Under the Simplified Method, roughly $250 per month ($60,000 ÷ 240) would be a tax-free return of your contributions, and about $1,750 would be taxable. The exact number of expected payments depends on your age and the IRS table; this example is illustrative, not a calculation for your plan.
If you take a partial lump sum instead, the plan may recover your after-tax basis differently. Ask the administrator how it calculated Box 2a and whether any portion is a return of contributions.
10. Official Sources
- IRS Publication 575 — Pension and Annuity Income
- IRS Publication 590-B — Distributions from IRAs
- IRS Publication 721 — Tax Guide to U.S. Civil Service Retirement Benefits
- IRS Publication 939 — General Rule for Pensions and Annuities
- IRS Form W-4P
- IRS Instructions for Forms 1099-R and 5498
- Pension Benefit Guaranty Corporation
- CalSTRS
- OPM Retirement Services
- Kentucky Retirement Systems
- IRS — Required minimum distributions FAQs
- IRS IR-2024-309 — RMD reminder and SECURE 2.0 updates
Related guides
Last reviewed: 11 November 2026.
This guide is general information, not tax advice. Confirm your own numbers with the plan administrator, the current IRS instructions, and a qualified tax professional.