With one month to go until Election Day, the campaigns for votes on Proposition HH have now generated close to $3 million from all sides.

Proposition HH will ask voters next month whether to use Taxpayer’s Bill of Rights surplus revenue – which is usually refunded to taxpayers – to reduce property taxes, fund school districts and backfill counties, water districts, fire districts, ambulance or hospital districts and other local governments.

A companion measure from the legislature, which would only be implemented if HH passes, would provide a one-time only equalized TABOR refund to all taxpayers, paid next April when tax filings are due.

Beginning the following year, TABOR refunds would be reduced over the next decade and potentially beyond that. Under current law, TABOR refunds are first paid to cover senior and veteran property tax homestead exemptions; next through a temporary reduction in the state income tax; and, if any money is left, through a six-tiered sales tax refund with annual tax filings.

Those who oppose Prop HH lead in fundraising and spending with just weeks to go, but almost all of the money is coming from undisclosed funders.

No on HH, the issue committee run by Advance Colorado Action and led by Michael Fields, has now spent $728,000 to oppose the measure. Advance Colorado Action has contributed $1 million, including $500,000 in September.

As a dark money group that does not disclose its contributors, the source of Advance Colorado’s money is unknown.

The No on HH committee has now raised nearly $1.6 million. The committee also got $10,000 from the Special District Association, which represents many of the special districts that would be affected by changes in property tax revenue.

The committee has just over $833,000 in the bank for the final month of the election season.

Under its issue committee Taxpayers for a Better Deal, the Independence Institute, which also doesn’t disclose its funders, has now spent just over $9,000 in in-kind contributions to oppose Proposition HH.

The only issue committee that has raised money to support Proposition HH, Property Tax Relief Now, is up to $1.15 million in cash and in-kind contributions. 

In the past month, the pro-HH issue committee received $200,000 from the dark money group Education Reform Now Advocacy, and $100,000 from a “special account” from the National Education Association. The committee has more than $800,000 in the bank for the campaign’s final weeks. Boldly Forward, which has ties to Gov. Jared Polis, contributed another $17,000 in the last month, bringing its total funding to $67,000.

The pro-HH side also announced Wednesday that the measure is now supported by AARP, ProgressNow Colorado and the League of Women Voters of Colorado.