State tax guide
401(k) Rollover in Colorado
Colorado taxes 401(k) distributions as ordinary income at up to 4.40% flat (2026, subject to TABOR certification). A correctly executed direct rollover avoids all state tax. A failed rollover adds Colorado income tax on top of the federal bill.
What Colorado residents need to know
- Colorado has a flat income tax of 4.40% for 2026 under current law. The rate can drop in a given year if a TABOR surplus triggers a temporary reduction; the 2026 rate is not finalized until the surplus is certified in fall 2026, and the current forecast projects no reduction (4.40%).
- Colorado taxes 401(k) and IRA distributions as ordinary income, but offers a pension/annuity subtraction: up to $20,000 for taxpayers aged 55–64 and up to $24,000 at 65+, computed separately per spouse.
- Qualifying income for the subtraction includes taxable IRA distributions and pension/annuity income. Under-55 taxpayers generally get no subtraction (except certain death benefits).
- A failed 60-day rollover for someone under 55 is taxed at 4.40% with no subtraction; a 55+ taxpayer may shelter part of it within the cap. A successful direct rollover has no Colorado tax consequence.
- Social Security is fully deductible at 65+; for ages 55–64 it is fully deductible only if AGI is at or below $75,000 (single) / $95,000 (joint), otherwise it counts toward the $20,000 cap.
Watch out for
- The subtraction has a premature-distribution limit: IRA or self-employed-plan distributions that are actually subject to the federal 10% early-withdrawal penalty do NOT qualify. Distributions that escape the penalty via a federal exception can qualify.
- Whether a Roth conversion qualifies for the pension subtraction is not addressed by Colorado's official guidance — a literal reading suggests a 55+ filer can apply the cap, but confirm with a CPA rather than relying on it.
The right move for Colorado residents
The most important step is the same in every state: do a direct rollover — custodian-to-custodian, no check issued to you. This eliminates the 20% mandatory federal withholding, the 60-day deadline risk, and all state tax exposure in one step.
The nesthelm plan generates custodian-specific transfer instructions for your exact situation — your custodian, your balance, your destination, and your state. Free preview, $49 full plan.
Free tools for Colorado residents
Custodian guides
State rules are half the picture — the transfer itself runs through your custodian's process.
This guide provides educational information about Colorado state tax rules as applied to 401(k) rollovers. State tax law changes frequently. Verify with a Colorado-licensed CPA before acting on this information.