Colorado Proposition NN
Raise the state revenue limit and keep the surplus · November 3, 2026 · Tax year 2027
What Proposition NN would do
Colorado Proposition NN would permanently raise the state’s TABOR revenue limit by its K-12 education spending, letting the state keep revenue it would otherwise refund; PolicyEngine scores the sales tax refunds projected for tax years 2027 and 2028.
What changes if it passes
- Starts with the 2026-27 budget year and has no end date.
- Spends the retained revenue first on property tax exemption reimbursements to local governments, as current law already does, and deposits the rest in a new Children’s Account.
- For ten years, directs the Children’s Account to K-12 education and to programs for children.
- Requires an annual independent audit of how the money is spent.
Estimates at a glance
Sales tax refunds not paid, 2027
Loading…
PolicyEngine estimate
Official estimate
$259.8M
Legislative Council Staff, September 2026 forecast, FY 2026-27 surplus (tax year 2027 refunds)
Returns receiving a refund under current law
Loading…
Returns receiving the six-tier refund
Current law and if it passes
| Group | Current law | If it passes |
|---|---|---|
| Up to $57,000 | $43 | $0 |
| $57,001 to $117,000 | $58 | $0 |
| $117,001 to $187,000 | $67 | $0 |
| $187,001 to $265,000 | $79 | $0 |
| $265,001 to $349,000 | $85 | $0 |
| Over $349,000 | $137 | $0 |
| Group | Current law | If it passes |
|---|---|---|
| Up to $59,000 | $47 | $0 |
| $59,001 to $120,000 | $62 | $0 |
| $120,001 to $192,000 | $71 | $0 |
| $192,001 to $272,000 | $85 | $0 |
| $272,001 to $358,000 | $91 | $0 |
| Over $358,000 | $147 | $0 |
Who is affected
Under current law, Colorado filers receive the six-tier sales tax refund on their income tax returns; if Proposition NN passes, those refunds are not paid for tax years 2027 and 2028.
Key facts
- Vote needed
- A majority vote.
- Takes effect
- Budget years beginning July 1, 2026, with no end date.
- Years modeled
- Tax years 2027 and 2028