Colorado voters approved Proposition NN on November 3, letting the state keep tax money it would otherwise have handed back to residents under the Taxpayer’s Bill of Rights. The measure wipes out two years of TABOR refunds that state analysts valued at $329.9 million and $521.0 million.
For most households the loss is a small check that never comes. For the state, it is a new stream of money aimed first at property tax breaks for seniors and disabled veterans, then at schools and children’s programs.
How Proposition NN takes $850.9 million in TABOR refunds
TABOR caps how much revenue Colorado can keep each year and sends the excess back to taxpayers. Proposition NN raises that cap. The voter guide prepared by the Legislative Council, known as the Blue Book, says the new limit equals the old one plus the highest prior-year spending on K-12 schools from certain sources, which puts it $4.6 billion above the current limit in the first year.
The state is not expected to collect anywhere near that much extra. The Blue Book estimates Colorado will keep only about $500 million in the first year. The official fiscal impact statement puts the net cut to refunds at $329.9 million for the 2026-27 budget year and $521.0 million for 2027-28. Together that is $850.9 million that would have gone back to taxpayers.
The statement says the measure is expected to eliminate those refunds. In 2027-28, the lost money comes from three refund channels: $213.2 million in property tax refunds, $148.7 million tied to an income tax rate reduction, and $159.1 million in the six-tier sales tax refund.
The relief Proposition NN pays for first: The measure’s first use of kept revenue is reimbursing Colorado’s senior and disabled-veteran property tax exemptions, which only reach homeowners who file with the county assessor. The five kinds of relief in The Senior Property Tax & Home-Cost Relief Kit show where an exemption like Colorado’s fits among freezes, deferrals and credits.
What the lost TABOR refunds look like by income
The Blue Book includes a table of estimated refunds per filer under current law, all of which drop to zero under Proposition NN. It assumes the standard deduction and no other deductions.
- $50,000 in income: $21 single or $42 joint in 2027; $39 single or $58 joint in 2028.
- $100,000 in income: $28 single or $56 joint in 2027; $68 single or $96 joint in 2028.
- $200,000 in income: $38 single or $76 joint in 2027; $121 single or $162 joint in 2028.
- $500,000 in income: $65 single or $130 joint in 2027; $276 single or $352 joint in 2028.
Those are modest sums for a single year. The Blue Book also warns that the impact varies from year to year and that in some years the measure could reduce refunds by more than $1,000 per taxpayer.
Where the kept money goes under the measure
The order of spending is written into the measure. Kept revenue first reimburses local governments for property tax exemptions for seniors, veterans with a disability and Gold Star surviving spouses. What remains goes into a new Children’s Account for K-12 teacher pay, career and technical courses and smaller classes, plus preschool and child care.
The fiscal statement says at least half of the retained money must go to K-12 schools through the 2035-36 budget year, with the rest for children’s programs. After that, lawmakers decide how to use the extra revenue. The statement adds that no forecast of TABOR revenue exists beyond 2027-28, so the size of later refund losses is unknown.
The senior property tax exemption funded first
Colorado’s senior property tax exemption removes 50% of the first $200,000 of a home’s actual value from taxation when the state budget allows. To qualify, a homeowner must be 65 by January 1 of the application year and must have owned and lived in the home as a primary residence for at least 10 straight years. Some surviving spouses also qualify.
Applications go to the county assessor by July 15. Assessors must take late applications through August 15, but late filers give up their appeal rights. The state reimburses local governments for the lost property tax, and that reimbursement is now the first claim on money kept under Proposition NN.
The costly mistake for an older Colorado homeowner is assuming the exemption is automatic. It is not. A qualifying senior who never files with the assessor gets no exemption at all, regardless of how the state funds it.
When the Proposition NN results become final
The Associated Press called the race at 11:23 p.m. on election night with the measure passing 55.3% to 44.7%, KUNC reported. Election-night returns remain unofficial until the state certifies them.
Colorado Democratic Party Chair Shad Murib said the vote gave the state more resources to meet its responsibility to students. A voter who opposed the measure told KUNC that every penny counts. The refunds tied to 2026-27 and 2027-28 are the first ones affected.
Colorado’s senior exemption after Proposition NN
Proposition NN puts reimbursement of Colorado’s senior and disabled-veteran property tax exemptions first in line for the money the state keeps under the measure. That protection only reaches a homeowner who has filed with the county assessor, and an older homeowner who never applied gets none of it.
The Senior Property Tax & Home-Cost Relief Kit sets out the 5 kinds of property-tax relief alongside an application log and renewal calendar for tracking each filing.
Compare the five kinds of relief in The Senior Property Tax & Home-Cost Relief Kit.
This article was created with AI assistance and reviewed for accuracy against Colorado Legislative Council ballot analysis, the state fiscal impact statement, Colorado property tax guidance and news reports.
Julian Harrow specializes in taxation, IRS rules, and compliance strategy. His work helps readers navigate complex tax codes, deadlines, and reporting requirements while identifying opportunities for efficiency and risk reduction. At The Daily Overview, Julian breaks down tax-related topics with precision and clarity, making a traditionally dense subject easier to understand.
