Colorado business owners, including sole proprietors and owners of S corporations and partnerships, face two state rules that reach the same federal tax break. One rule, which Colorado lawmakers extended with no end date, requires higher-income owners to add back their federal qualified business income (QBI) deduction on their state return. The other rule requires every owner of a business that makes the state’s SALT Parity election to add back the same deduction, regardless of income. The SALT Parity election, also called the pass-through entity tax (PTET) election, lets the business pay Colorado income tax itself.
Does your business make the SALT Parity election each year? Here’s how both rules work, with examples that show where different owners fit.
What Is the Colorado QBI Add-Back?
The Colorado QBI add-back requires certain taxpayers to add their federal QBI deduction back into income when they calculate Colorado taxable income, even though the deduction still applies on their federal return. The federal QBI deduction allows individuals, along with some trusts and estates, to deduct up to 20% of their net qualified business income, which includes income passed through from an S corporation or partnership.
Here’s the rule at a glance:
- Who it affects. The rule reaches any individual who claims the federal QBI deduction with adjusted gross income (AGI) over the income limits, including sole proprietors and single-member LLC owners, along with owners of an S corporation or partnership that makes the SALT Parity election.
- How much is added back. Affected taxpayers add back the full amount of their federal QBI deduction.
- Where it’s reported. The add-back appears on line 3 of the Colorado individual income tax return (Form DR 0104).
- How long it lasts. Colorado House Bill 25B-1001 removed the end date for the income-based add-back, so it now continues indefinitely. The SALT Parity add-back applies in any year a business makes the election.
Who Has to Add Back the QBI Deduction in Colorado?
Taxpayers with AGI over $500,000, or over $1,000,000 for joint filers, must add back the full amount of their federal QBI deduction. The $500,000 limit applies to every filing status other than married filing jointly, including single, head of household, and married filing separately.
For example, a married couple filing jointly owns a two-location restaurant group through an S corporation. Their AGI is $1.2 million, and their federal QBI deduction is $80,000, so they add the full $80,000 back on their Colorado return. If the same couple’s AGI were $950,000 and none of their businesses made the SALT Parity election, they wouldn’t owe this add-back.
Are There Exceptions to the Colorado QBI Add-Back?
Colorado allows one exception to the income-based add-back. Taxpayers who are required to file a federal Schedule F, which reports profit or loss from farming, for the same year they claim the QBI deduction don’t have to add it back, even when their AGI is over the limits. The exception is tied to the income-based rule, so farm owners in a business that makes the SALT Parity election should still review the SALT Parity rule below.
How Does the Colorado PTET Election Affect the QBI Deduction?
When an S corporation or partnership makes the SALT Parity election, every owner must add back their entire QBI deduction on their Colorado return, regardless of income. The election lets the business pay Colorado tax at the business level so owners may claim a larger federal deduction for state taxes, while owners below the income limits lose the Colorado benefit of their QBI deduction.
The federal side of that trade changed in 2025. The One Big Beautiful Bill Act raised the federal cap on state and local tax (SALT) deductions to $40,400 for 2026, with the cap phasing down for owners with modified AGI over about $500,000. Owners whose state and local taxes already fit under the higher cap may see less federal benefit from the election than in past years.
Consider a single owner of a home remodeling company with $250,000 in AGI and a $40,000 QBI deduction. Without the election, they keep the deduction on their Colorado return because their income is under $500,000. Once the business elects, they add back the full $40,000, which at Colorado’s current 4.4% rate means roughly $1,760 in added state tax in this example, an amount the federal savings from the election would need to outweigh.
The add-back also reaches beyond the electing business, since Colorado requires each owner to add back their full QBI deduction, including any portion that comes from other businesses they own.
When Does the Colorado QBI Add-Back Apply?
Colorado has required the income-based add-back since the 2021 tax year, and before HB25B-1001 it was set to end after the 2025 tax year. The first return affected by the change covers the 2026 tax year, which is generally due April 15, 2027, and under current law, the add-back continues on each return after that.
A business makes the SALT Parity election one year at a time, either by checking the election box on its Colorado partnership or S corporation return or by filing a separate election form before that return is filed. Once made, the election can’t be changed for that year and applies to every owner.
Is the Colorado SALT Parity Election Worth It?
The SALT Parity election may lower an owner’s federal tax and may also raise their Colorado tax, so comparing the two effects is one way to judge its value. Looking at both outcomes before the election is made can help each owner see how it affects them. These four steps can help you evaluate your options:
- Compare your projected AGI to the income limits. Owners already over the limits who aren’t required to file a Schedule F add back the QBI deduction either way, so the election doesn’t change their add-back.
- Calculate your Colorado tax with and without the election. Include the full add-back and any QBI from other businesses.
- Review the impact on each co-owner. The election applies to every owner, so owners under the income limits may carry more of the added Colorado tax than co-owners who already exceed them.
- Adjust your estimated payments if needed. Colorado’s individual estimated payments are generally due April 15, June 15, September 15, and January 15 of the following year.
What Should Colorado Business Owners Do Next?
If you own a Colorado business or part of one, two checks from this article can help you see whether these rules affect your return: your AGI against the income limits, and the add-back across every business you own. MBE CPAs can run those numbers with you and any co-owners before you make any election decisions.