Larimer County property tax due dates give you two options: pay in two installments due by the last day of February and by June 15, or pay the full bill in one payment by April 30. Taxes always cover the prior calendar year, so a payment you make in 2026 settles your 2025 tax obligation.1Justia. Colorado Code 39-10-104.5 – Payment Dates – Optional Payment Dates – Failure to Pay – Delinquency – Repeal
The Two Payment Schedules
Colorado law sets both schedules. If you split the bill, the first half is due by the last day of February (February 28 in most years, February 29 in a leap year), and the second half is due by June 15. If you pay all at once, the full amount is due by April 30.1Justia. Colorado Code 39-10-104.5 – Payment Dates – Optional Payment Dates – Failure to Pay – Delinquency – Repeal
When any of these deadlines falls on a weekend or legal holiday, the due date shifts to the next business day.1Justia. Colorado Code 39-10-104.5 – Payment Dates – Optional Payment Dates – Failure to Pay – Delinquency – Repeal
One rule catches people off guard. If your total tax bill is under $25, you cannot split it. The entire amount must be paid by April 30.1Justia. Colorado Code 39-10-104.5 – Payment Dates – Optional Payment Dates – Failure to Pay – Delinquency – Repeal
How To Pay
The Treasurer’s office accepts payments four ways. You can pay online through the Treasurer’s portal using an eCheck or a credit or debit card.2Larimer County. Treasurer and Public Trustee You can pay in person at 200 West Oak Street in Fort Collins, or drop a payment into the 24-hour secure drop box at the same address outside business hours.
Mailed payments go to:
Larimer County Treasurer
PO Box 1250
Fort Collins, CO 805223Colorado Division of Property Taxation. Larimer County Treasurer
eCheck payments online are typically free. Credit and debit card payments carry a 2.29% convenience fee with a $1 minimum, so on a $1,000 bill the fee adds $22.90. On a bill of $43.50 or less the fee is just $1.4Larimer County. Credit Card and Electronic Check Information For a larger bill, eCheck is the cheaper route by a wide margin.
Every property has a unique Schedule Number (also called a Parcel Number) printed on your tax statement. If you pay by check, write that number in the memo line and make sure the dollar amount matches the installment figure on your voucher. A mismatch can cause a processing delay or an accidental underpayment. If your statement never arrived in the mail, you can download a copy or a payment voucher from the Treasurer’s website.2Larimer County. Treasurer and Public Trustee
If You Miss a Deadline
A missed deadline triggers delinquent interest at 1% per month on the unpaid balance. Partial months count as full months, so being one day into a new month costs the same as being 29 days late.1Justia. Colorado Code 39-10-104.5 – Payment Dates – Optional Payment Dates – Failure to Pay – Delinquency – Repeal
How the interest clock starts depends on which option you chose:
- First installment missed: interest runs at 1% per month beginning March 1. If you pay within 30 days of the Treasurer mailing your tax statement, no interest accrues, even if that falls past the end of February.
- Second installment missed: interest accrues at 1% per month beginning June 16, and any unpaid interest on a late first installment keeps compounding alongside it.
- Full payment missed: interest accrues at 1% per month beginning May 1.1Justia. Colorado Code 39-10-104.5 – Payment Dates – Optional Payment Dates – Failure to Pay – Delinquency – Repeal
There is one safety valve worth knowing. If you miss the February installment but pay the entire bill by April 30, no interest accrues on any portion of the taxes. In practical terms, a missed first installment can be cured by switching to a lump-sum payment before the end of April.1Justia. Colorado Code 39-10-104.5 – Payment Dates – Optional Payment Dates – Failure to Pay – Delinquency – Repeal
If Taxes Stay Unpaid
Taxes that remain unpaid eventually go to a tax lien sale. In Larimer County, that sale happens each November.5Larimer County. Delinquent Property Tax Payments At the sale, an investor pays off your delinquent taxes and receives a lien certificate against your property. You do not lose your home at that moment, but you now owe the investor rather than the county, and that debt accrues interest at a rate set annually by the State Banking Commission.
Under Colorado law, you have three years from the original sale date to redeem the lien by paying the outstanding amount plus accrued interest. If you do not redeem within that window, the lien holder can eventually apply for a treasurer’s deed and take ownership of the property.6El Paso County Treasurer. Real Estate Tax Lien Questions Clearing a delinquent balance before the November sale avoids all of that.
If Your Mortgage Escrows Taxes
If you have a mortgage, there is a good chance your lender collects property taxes through an escrow account built into your monthly payment, and your servicer pays the Treasurer’s office on your behalf. One thing to keep in mind: if the servicer misses a deadline, the delinquent interest attaches to your property, not to the servicer. Check your escrow statements each cycle and confirm the payment was actually disbursed on time.
When your escrow balance shifts because of a reassessment or a mill levy change, your monthly mortgage payment shifts with it. Lenders typically send an escrow adjustment notice once a year.