Late payment penalties in Colorado are governed by different rules depending on what you owe. A landlord cannot charge a late fee until rent is seven days overdue and cannot charge more than the greater of $50 or 5% of the past-due rent. State tax penalties start at 5% or 10% of the balance and climb with each month of delay. Utility late charges must be disclosed in the service agreement. Consumer loan fees are capped by the Uniform Consumer Credit Code. Charges above these limits are not enforceable, even if your lease or contract says otherwise.
Rent Late Fees
Colorado sets some of the clearest limits in the country on rent late fees. Under C.R.S. ยง 38-12-105, a landlord cannot charge any late fee unless your rent is at least seven calendar days overdue. That grace period is mandatory and cannot be shortened by anything written in your lease.1Justia. Colorado Revised Statutes Title 38-12-105 – Late Fees Charged to Tenants and Mobile Home Owners
Once the grace period passes, the fee itself is capped at the greater of $50 or 5% of the past-due rent. On $1,500 rent, the maximum fee is $75. On $900 rent, it is $50, because 5% of $900 is only $45.1Justia. Colorado Revised Statutes Title 38-12-105 – Late Fees Charged to Tenants and Mobile Home Owners
Lease templates pulled off the internet routinely list late fees that exceed Colorado’s cap or set a grace period shorter than seven days. The statute overrides those terms. If a landlord bills you for a fee that violates the law, you can raise it as a defense in an eviction case or pursue it as a separate claim.
Colorado State Tax Penalties
Penalties from the Colorado Department of Revenue escalate the longer you wait, and the starting rate depends on the tax.
Income Tax and Wage Withholding
Late filing or late payment on Colorado income tax triggers a penalty of 5% of the unpaid tax, plus 0.5% for each additional full or partial month the balance stays open, capped at 12%. The minimum penalty is $5. Wage withholding tax follows the same formula.2Colorado Department of Revenue. Tax Topics: Penalties and Interest
Sales, Use, and Excise Taxes
Sales tax, retailer’s use tax, marijuana taxes, cigarette and tobacco taxes, and fuel excise tax all start at 10% of the unpaid amount and add 0.5% per month, capping at 18%. Minimum penalties vary: $15 for most of these, $30 for fuel excise.2Colorado Department of Revenue. Tax Topics: Penalties and Interest
Interest on the Unpaid Tax
Interest runs on top of the penalty, from the original due date until payment. For 2026, the discounted rate is 8% per year and the regular rate is 11%. You get the lower rate if you pay before the department issues a deficiency notice, or within 30 days after receiving one. Miss that window and 11% applies. Interest accrues daily.3Colorado Department of Revenue. Tax Topics: Penalties and Interest
Asking for a Waiver
The Department of Revenue can waive tax penalties for “good cause shown.” There is no fixed list of qualifying reasons, but natural disasters, serious illness, and reliance on erroneous written guidance from the department are the kinds of circumstances most likely to succeed. A denial can be escalated through the state’s administrative protest process.4Colorado Department of Revenue. Penalties and Interest
Federal Tax Penalties
Colorado residents also file federally, and the IRS penalties are structured differently. The failure-to-file penalty is 5% of the unpaid tax per month, up to 25%. If your return is more than 60 days late, the minimum penalty for returns due in 2026 is the lesser of $525 or 100% of the tax owed.5Internal Revenue Service. Topic No. 653, IRS Notices and Bills, Penalties and Interest Charges
The failure-to-pay penalty is separate, running at 0.5% of the unpaid tax per month and also capping at 25%. If you set up an approved payment plan, that rate drops to 0.25%. If you ignore a notice of intent to levy, it jumps to 1%.6Internal Revenue Service. Failure to Pay Penalty
The costly mistake is not filing because you cannot pay. The failure-to-file penalty is ten times the failure-to-pay penalty. File on time even when you owe money you do not have yet.
Consumer Loan and Credit Card Late Fees
Colorado’s Uniform Consumer Credit Code governs late fees on most consumer loans, credit cards, and installment agreements. The UCCC sets maximum rates and charges, requires lenders to disclose the cost of credit, and gives borrowers legal remedies when creditors overcharge.7Colorado Attorney General. Colorado Uniform Consumer Credit Code
Under the UCCC, a lender can charge a delinquency fee on any installment that is not paid in full within ten days of its scheduled due date. That ten-day window acts as a built-in grace period for most consumer loans in the state.
Credit card late fees still follow the terms of your cardholder agreement and existing UCCC limits. The Consumer Financial Protection Bureau finalized a rule in 2024 that would have capped late fees at $8 for large card issuers, but a federal court stayed that rule and it is not in effect.8Consumer Financial Protection Bureau. Credit Card Penalty Fees Final Rule
Colorado’s general usury ceiling lets parties to a written agreement stipulate interest up to 45% per year, but the UCCC’s consumer-specific articles impose much lower caps on supervised consumer loans. If a late fee or interest rate on a consumer loan looks extreme, the UCCC probably limits what the lender can actually collect.9Justia. Colorado Revised Statutes Title 5-12-103 – Greater Rate May Be Stipulated
Utility Late Charges
The Colorado Public Utilities Commission regulates late payment charges for utilities like electric, gas, and water. Utility companies must file their late payment policies in their tariffs with the PUC, and those policies must be disclosed to you when you set up service. A utility cannot spring a late fee on you that was never mentioned.10Public Utilities Commission. Tariff Filings
Fees are typically flat charges rather than interest, and the PUC requires that they stay reasonable. Regulated charges must generally exceed $50 before a late payment charge can apply. If a utility imposes a fee that was not properly disclosed or that you believe is unreasonable, you can file a complaint with the PUC, which can order a refund or waiver.10Public Utilities Commission. Tariff Filings
If You Are on Active Duty
The federal Servicemembers Civil Relief Act caps interest at 6% per year on debts a service member took on before entering active duty. “Interest” is defined broadly to include service charges, renewal charges, fees, and any other charge except bona fide insurance, so the cap effectively limits most late fees on pre-service obligations.11Office of the Law Revision Counsel. 50 USC 3937 – Maximum Rate of Interest on Debts Incurred Before Military Service
To claim the cap, send the creditor written notice with a copy of your military orders within 180 days after your service ends. The protection covers active-duty members on Title 10 orders, reservists, National Guard on qualifying orders lasting more than 30 consecutive days during a presidential emergency, and commissioned officers of the Public Health Service and NOAA.12U.S. Department of Justice. Your Rights as a Servicemember: 6 Percent Interest Rate Cap for Servicemembers on Pre-Service Debts
Watch two limits. Refinancing or consolidating a pre-service loan during active duty can create a new debt that originated during service, which would make it ineligible for the cap. And the SCRA does not stop creditors from reporting late or missed payments to credit bureaus. The protection shrinks what you owe; it does not shield your credit score.13Consumer Financial Protection Bureau. Servicemembers Civil Relief Act (SCRA)
How to Dispute a Penalty You Think Is Wrong
The channel depends on who imposed the fee.
For a utility charge that was not disclosed or that exceeds the filed tariff, file a complaint with the PUC and bring your billing statements and any paperwork from when service started.10Public Utilities Commission. Tariff Filings
For a late charge on a loan or credit account, the UCCC gives you the right to sue a creditor that overcharges. You can also file a complaint with the Colorado Attorney General’s Consumer Credit Unit, which investigates UCCC violations.7Colorado Attorney General. Colorado Uniform Consumer Credit Code
For a state tax penalty, request abatement from the Department of Revenue for good cause. If denied, you can pursue the formal protest process and, if necessary, go to the Colorado Office of Administrative Courts or state court.4Colorado Department of Revenue. Penalties and Interest
For a rent late fee charged before day seven or above the statutory cap, you can raise the violation as a defense in an eviction proceeding or pursue it as a separate claim.1Justia. Colorado Revised Statutes Title 38-12-105 – Late Fees Charged to Tenants and Mobile Home Owners
One point that catches people off guard: disputing a penalty does not automatically pause it. In most cases you still pay the amount while the dispute is pending and get a refund if you win. With tax penalties, interest keeps accruing during the dispute, so the cash-flow timing matters.
What a Late Payment Does to Your Credit
The penalty is often the smaller problem. Under the Fair Credit Reporting Act, adverse items like late payments can stay on your credit report for up to seven years.14Federal Trade Commission. Fair Credit Reporting Act
A single late payment can drop a credit score by up to 100 points depending on your history and the severity of the delinquency, which can affect loan approval, interest rates, and rental applications.
Medical debt is treated more leniently. The three major credit bureaus voluntarily agreed to exclude medical debts under $500 from credit reports entirely and will not report any medical debt that is less than one year delinquent, giving you time to resolve billing disputes or set up a payment plan.
If a late payment is reported inaccurately, the FCRA gives you the right to dispute it. The credit bureau must investigate and correct or remove unverifiable information, usually within 30 days.15Consumer Financial Protection Bureau. A Summary of Your Rights Under the Fair Credit Reporting Act
If you know a payment will be late, contact the creditor before the due date. Many lenders will agree to a short deferral or modified payment plan, especially if you have a history of paying on time, and a creditor who agrees in advance is far less likely to report the account as delinquent.